androidx.compose.material

Build Jetpack Compose UIs with ready to use Material Design Components. This is the higher level entry point of Compose, designed to provide components that match those described at material.io.

Material Design image

In this page, you'll find documentation for types, properties, and functions available in the androidx.compose.material package.

For more information, check out the Material Theming in Compose guide.

Overview

Theming

Material Theming refers to the customization of your Material Design app to better reflect your product’s brand.

APIs Description
Material Theming MaterialTheme Material Theme
Color Colors Material Design color system
Typography Typography Material Design type scale
Shape Shapes Material Design shape

Components

Material Components are interactive building blocks for creating a user interface.

APIs Description
App bars: bottom BottomAppBar Bottom app bar
App bars: top TopAppBar Top app bar
Backdrop BackdropScaffold Backdrop
Bottom navigation BottomNavigation Bottom navigation
Buttons Button Contained button
OutlinedButton Outlined button
TextButton Text button
Buttons: floating action button FloatingActionButton Floating action button
ExtendedFloatingActionButton Extended floating action button
Cards Card Card
Checkboxes Checkbox Checkbox
TriStateCheckbox Parent checkbox
Dialogs AlertDialog Alert dialog
Dividers Divider Divider
Lists ListItem List item
Menus DropdownMenu Dropdown menu
DropdownMenuItem Dropdown menu item
Navigation drawer ModalDrawer Modal navigation drawer
BottomDrawer Bottom navigation drawer
Progress indicators LinearProgressIndicator Linear progress indicator
CircularProgressIndicator Circular progress indicator
Radio buttons RadioButton Radio button
Sheets: bottom BottomSheetScaffold Standard bottom sheet
ModalBottomSheetLayout Modal bottom sheet
Sliders Slider Slider
Snackbars Snackbar Snackbar
Switches Switch Switch
Tabs Tab Tab
LeadingIconTab Icon tab
TabRow Fixed tabs
ScrollableTabRow Scrollable tabs
Text fields TextField Filled text field
OutlinedTextField Outlined text field

Dark theme

A dark theme is a low-light UI that displays mostly dark surfaces.

APIs Description
System androidx.compose.foundation.isSystemInDarkTheme System dark theme
Elevation ElevationOverlay Elevation overlay
Color primarySurface Primary surface color

Surfaces and layout

Material Design defines the qualities that can be expressed by UI regions, surfaces, and components.

APIs Description
Surfaces Surface Material surface
Layout Scaffold Basic Material Design visual layout structure

Icons

APIs Description
Icon Icon Icon
Icon button IconButton Icon button
Icon toggle button IconToggleButton Icon toggle button

Also check out the androidx.compose.material.icons package.

Interfaces

AlertDialogProvider

Defines how to create dialog in which will be placed AlertDialog's content.

android
ButtonColors

Represents the background and content colors used in a button in different states.

Cmn
ButtonElevation

Represents the elevation for a button in different states.

Cmn
CheckboxColors

Represents the colors used by the three different sections (checkmark, box, and border) of a Checkbox or TriStateCheckbox in different states.

Cmn
ChipColors

Represents the background and content colors used in a clickable chip in different states.

Cmn
ElevationOverlay

An ElevationOverlay is an overlay applied to the background color of Surface components, used to emphasize elevation in dark theme, where shadows are not as visible.

Cmn
FloatingActionButtonElevation

Represents the elevation for a floating action button in different states.

Cmn
RadioButtonColors

Represents the color used by a RadioButton in different states.

Cmn
SelectableChipColors

Represents the background and content colors used in a selectable chip in different states.

Cmn
SliderColors

Represents the colors used by a Slider and its parts in different states

Cmn
SnackbarData

Interface to represent one particular Snackbar as a piece of the SnackbarHostState

Cmn
SwitchColors

Represents the colors used by a Switch in different states

Cmn
TextFieldColors

Represents the colors of the input text, background and content (including label, placeholder, leading and trailing icons) used in a text field in different states.

Cmn
TextFieldColorsWithIcons

This interface is deprecated. Empty interface; use parent TextFieldColors instead

Cmn
ThresholdConfig

This interface is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn

Classes

BackdropScaffoldState

State of the BackdropScaffold composable.

Cmn
BottomDrawerState

State of the BottomDrawer composable.

Cmn
BottomSheetScaffoldState

State of the BottomSheetScaffold composable.

Cmn
BottomSheetState

State of the persistent bottom sheet in BottomSheetScaffold.

Cmn
Colors

Material Design color system.

Cmn
DismissState

State of the SwipeToDismiss composable.

Cmn
DrawerState

State of the ModalDrawer composable.

Cmn
ExposedDropdownMenuBoxScope

Scope for ExposedDropdownMenuBox.

android
FabPosition

The possible positions for a FloatingActionButton attached to a Scaffold.

Cmn
FixedThreshold

This class is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn
FractionalThreshold

This class is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn
ModalBottomSheetState

State of the ModalBottomSheetLayout composable.

Cmn
ResistanceConfig

This class is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn
RippleConfiguration

Configuration for ripple appearance, provided using LocalRippleConfiguration.

Cmn
ScaffoldState

State for Scaffold composable component.

Cmn
Shapes

Material Design shape.

Cmn
SnackbarHostState

State of the SnackbarHost, controls the queue and the current Snackbar being shown inside the SnackbarHost.

Cmn
SwipeProgress

This class is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn
SwipeableState

This class is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn
TabPosition

Data class that contains information about a tab's position on screen, used for calculating where to place the indicator that shows which tab is selected.

Cmn
Typography

Material Design type scale.

Cmn

Objects

AppBarDefaults

Contains default values used for TopAppBar and BottomAppBar.

Cmn
BackdropScaffoldDefaults

Contains useful defaults for BackdropScaffold.

Cmn
BottomNavigationDefaults

Contains default values used for BottomNavigation.

Cmn
BottomSheetScaffoldDefaults

Contains useful defaults for BottomSheetScaffold.

Cmn
ButtonDefaults

Contains the default values used by Button

Cmn
CheckboxDefaults

Defaults used in Checkbox and TriStateCheckbox.

Cmn
ChipDefaults

Contains the baseline values used by chips.

Cmn
ContentAlpha

Default alpha levels used by Material components.

Cmn
DrawerDefaults

Object to hold default values for ModalDrawer and BottomDrawer

Cmn
ExposedDropdownMenuDefaults

Contains default values used by Exposed Dropdown Menu.

android
FloatingActionButtonDefaults

Contains the default values used by FloatingActionButton

Cmn
MaterialTheme

Contains functions to access the current theme values provided at the call site's position in the hierarchy.

Cmn
MenuDefaults

Contains default values used for DropdownMenuItem.

Cmn
ModalBottomSheetDefaults

Contains useful Defaults for ModalBottomSheetLayout.

Cmn
NavigationRailDefaults

Contains default values used for NavigationRail.

Cmn
PopupAlertDialogProvider

Shows Alert dialog as popup in the middle of the window.

android
ProgressIndicatorDefaults

Contains the default values used for LinearProgressIndicator and CircularProgressIndicator.

Cmn
RadioButtonDefaults

Defaults used in RadioButton.

Cmn
RippleDefaults

Default values used by ripple.

Cmn
ScaffoldDefaults

Object containing various default values for Scaffold component.

Cmn
SliderDefaults

Object to hold defaults used by Slider

Cmn
SnackbarDefaults

Object to hold defaults used by Snackbar

Cmn
SwipeableDefaults

This object is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn
SwitchDefaults

Contains the default values used by Switch

Cmn
TabRowDefaults

Contains default implementations and values used for TabRow.

Cmn
TextFieldDefaults

Contains the default values used by TextField and OutlinedTextField.

Cmn
UndecoratedWindowAlertDialogProvider

Shows Alert dialog as undecorated draggable window.

android

Annotations

Enums

BackdropValue

Possible values of BackdropScaffoldState.

Cmn
BottomDrawerValue

Possible values of BottomDrawerState.

Cmn
BottomSheetValue

Possible values of BottomSheetState.

Cmn
DismissDirection

The directions in which a SwipeToDismiss can be dismissed.

Cmn
DismissValue

Possible values of DismissState.

Cmn
DrawerValue

Possible values of DrawerState.

Cmn
ModalBottomSheetValue

Possible values of ModalBottomSheetState.

Cmn
SnackbarDuration

Possible durations of the Snackbar in SnackbarHost

Cmn
SnackbarResult

Possible results of the SnackbarHostState.showSnackbar call

Cmn

Top-level functions summary

Unit
@Composable
@ExperimentalMaterialApi
AlertDialog(
    onDismissRequest: () -> Unit,
    buttons: @Composable () -> Unit,
    modifier: Modifier,
    title: (@Composable () -> Unit)?,
    text: (@Composable () -> Unit)?,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    dialogProvider: AlertDialogProvider
)

Alert dialog is a Dialog which interrupts the user with urgent information, details or actions.

android
Unit
@Composable
AlertDialog(
    onDismissRequest: () -> Unit,
    buttons: @Composable () -> Unit,
    modifier: Modifier,
    title: (@Composable () -> Unit)?,
    text: (@Composable () -> Unit)?,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    properties: DialogProperties
)

Material Design alert dialog.

android
Unit
@Composable
@ExperimentalMaterialApi
AlertDialog(
    onDismissRequest: () -> Unit,
    confirmButton: @Composable () -> Unit,
    modifier: Modifier,
    dismissButton: (@Composable () -> Unit)?,
    title: (@Composable () -> Unit)?,
    text: (@Composable () -> Unit)?,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    dialogProvider: AlertDialogProvider
)

Alert dialog is a Dialog which interrupts the user with urgent information, details or actions.

android
Unit
@Composable
AlertDialog(
    onDismissRequest: () -> Unit,
    confirmButton: @Composable () -> Unit,
    modifier: Modifier,
    dismissButton: (@Composable () -> Unit)?,
    title: (@Composable () -> Unit)?,
    text: (@Composable () -> Unit)?,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    properties: DialogProperties
)

Material Design alert dialog.

android
Unit
@Composable
BackdropScaffold(
    appBar: @Composable () -> Unit,
    backLayerContent: @Composable () -> Unit,
    frontLayerContent: @Composable () -> Unit,
    modifier: Modifier,
    scaffoldState: BackdropScaffoldState,
    snackbarHost: @Composable (SnackbarHostState) -> Unit,
    gesturesEnabled: Boolean,
    peekHeight: Dp,
    headerHeight: Dp,
    persistentAppBar: Boolean,
    stickyFrontLayer: Boolean,
    backLayerBackgroundColor: Color,
    backLayerContentColor: Color,
    frontLayerShape: Shape,
    frontLayerElevation: Dp,
    frontLayerBackgroundColor: Color,
    frontLayerContentColor: Color,
    frontLayerScrimColor: Color
)

Material Design backdrop.

Cmn
BackdropScaffoldState
BackdropScaffoldState(
    initialValue: BackdropValue,
    density: Density,
    animationSpec: AnimationSpec<Float>,
    confirmValueChange: (BackdropValue) -> Boolean,
    snackbarHostState: SnackbarHostState
)

State of the persistent bottom sheet in BackdropScaffold.

Cmn
Unit
@Composable
Badge(
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    content: (@Composable RowScope.() -> Unit)?
)

Badge is a component that can contain dynamic information, such as the presence of a new notification or a number of pending requests.

Cmn
Unit
@Composable
BadgedBox(
    badge: @Composable BoxScope.() -> Unit,
    modifier: Modifier,
    content: @Composable BoxScope.() -> Unit
)

A BadgeBox is used to decorate content with a badge that can contain dynamic information, such as the presence of a new notification or a number of pending requests.

Cmn
Unit
@Composable
BottomAppBar(
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    cutoutShape: Shape?,
    elevation: Dp,
    contentPadding: PaddingValues,
    content: @Composable RowScope.() -> Unit
)

Material Design bottom app bar.

Cmn
Unit
@Composable
BottomAppBar(
    windowInsets: WindowInsets,
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    cutoutShape: Shape?,
    elevation: Dp,
    contentPadding: PaddingValues,
    content: @Composable RowScope.() -> Unit
)

Material Design bottom app bar.

Cmn
Unit
@Composable
BottomDrawer(
    drawerContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier,
    drawerState: BottomDrawerState,
    gesturesEnabled: Boolean,
    drawerShape: Shape,
    drawerElevation: Dp,
    drawerBackgroundColor: Color,
    drawerContentColor: Color,
    scrimColor: Color,
    content: @Composable () -> Unit
)

Material Design bottom navigation drawer.

Cmn
Unit
@Composable
BottomNavigation(
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp,
    content: @Composable RowScope.() -> Unit
)

Material Design bottom navigation.

Cmn
Unit
@Composable
BottomNavigation(
    windowInsets: WindowInsets,
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp,
    content: @Composable RowScope.() -> Unit
)

Material Design bottom navigation.

Cmn
Unit
@Composable
BottomSheetScaffold(
    sheetContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier,
    scaffoldState: BottomSheetScaffoldState,
    topBar: (@Composable () -> Unit)?,
    snackbarHost: @Composable (SnackbarHostState) -> Unit,
    floatingActionButton: (@Composable () -> Unit)?,
    floatingActionButtonPosition: FabPosition,
    sheetGesturesEnabled: Boolean,
    sheetShape: Shape,
    sheetElevation: Dp,
    sheetBackgroundColor: Color,
    sheetContentColor: Color,
    sheetPeekHeight: Dp,
    backgroundColor: Color,
    contentColor: Color,
    content: @Composable (PaddingValues) -> Unit
)

Material Design standard bottom sheet.

Cmn
Unit
@Composable
Button(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    elevation: ButtonElevation?,
    shape: Shape,
    border: BorderStroke?,
    colors: ButtonColors,
    contentPadding: PaddingValues,
    content: @Composable RowScope.() -> Unit
)

Material Design contained button.

Cmn
Unit
@Composable
@NonRestartableComposable
Card(
    modifier: Modifier,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    border: BorderStroke?,
    elevation: Dp,
    content: @Composable () -> Unit
)

Material Design card.

Cmn
Unit
@ExperimentalMaterialApi
@Composable
@NonRestartableComposable
Card(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    border: BorderStroke?,
    elevation: Dp,
    interactionSource: MutableInteractionSource?,
    content: @Composable () -> Unit
)

Cards are Surfaces that display content and actions on a single topic.

Cmn
Unit
@Composable
Checkbox(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    colors: CheckboxColors
)

Material Design checkbox.

Cmn
Unit
@ExperimentalMaterialApi
@Composable
Chip(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    border: BorderStroke?,
    colors: ChipColors,
    leadingIcon: (@Composable () -> Unit)?,
    content: @Composable RowScope.() -> Unit
)

Material Design implementation of an action Chip.

Cmn
Unit
@Composable
CircularProgressIndicator(
    modifier: Modifier,
    color: Color,
    strokeWidth: Dp,
    backgroundColor: Color,
    strokeCap: StrokeCap
)

Indeterminate Material Design circular progress indicator.

Cmn
Unit
@Composable
CircularProgressIndicator(
    progress: @FloatRange(from = 0.0, to = 1.0) Float,
    modifier: Modifier,
    color: Color,
    strokeWidth: Dp,
    backgroundColor: Color,
    strokeCap: StrokeCap
)

Determinate Material Design circular progress indicator.

Cmn
Unit
@Composable
CursorDropdownMenu(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    focusable: Boolean,
    modifier: Modifier,
    scrollState: ScrollState,
    content: @Composable ColumnScope.() -> Unit
)

A CursorDropdownMenu behaves similarly to Popup and will use the current position of the mouse cursor to position itself on screen.

android
Unit
@Composable
Divider(modifier: Modifier, color: Color, thickness: Dp, startIndent: Dp)

Material Design divider.

Cmn
Unit
@Composable
DropdownMenu(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    focusable: Boolean,
    modifier: Modifier,
    offset: DpOffset,
    scrollState: ScrollState,
    content: @Composable ColumnScope.() -> Unit
)

A Material Design dropdown menu.

android
Unit
@Composable
DropdownMenu(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    modifier: Modifier,
    offset: DpOffset,
    scrollState: ScrollState,
    properties: PopupProperties,
    content: @Composable ColumnScope.() -> Unit
)

Material Design dropdown menu.

android
Unit
@Composable
DropdownMenuItem(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    contentPadding: PaddingValues,
    interactionSource: MutableInteractionSource?,
    content: @Composable RowScope.() -> Unit
)

Material Design dropdown menu item.

android
Unit
@Composable
DropdownMenuItem(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    contentPadding: PaddingValues,
    interactionSource: MutableInteractionSource?,
    content: @Composable RowScope.() -> Unit
)

A dropdown menu item, as defined by the Material Design spec.

android
Unit
@ExperimentalMaterialApi
@Composable
ExposedDropdownMenuBox(
    expanded: Boolean,
    onExpandedChange: (Boolean) -> Unit,
    modifier: Modifier,
    content: @Composable ExposedDropdownMenuBoxScope.() -> Unit
)

Material Design Exposed Dropdown Menu.

android
Unit
@Composable
ExtendedFloatingActionButton(
    text: @Composable () -> Unit,
    onClick: () -> Unit,
    modifier: Modifier,
    icon: (@Composable () -> Unit)?,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    elevation: FloatingActionButtonElevation
)

Material Design extended floating action button.

Cmn
Unit
@ExperimentalMaterialApi
@Composable
FilterChip(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    border: BorderStroke?,
    colors: SelectableChipColors,
    leadingIcon: (@Composable () -> Unit)?,
    selectedIcon: (@Composable () -> Unit)?,
    trailingIcon: (@Composable () -> Unit)?,
    content: @Composable RowScope.() -> Unit
)

Material Design filter chip.

Cmn
Unit
@Composable
FloatingActionButton(
    onClick: () -> Unit,
    modifier: Modifier,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    elevation: FloatingActionButtonElevation,
    content: @Composable () -> Unit
)

Material Design floating action button.

Cmn
Unit
@Composable
@NonRestartableComposable
Icon(
    bitmap: ImageBitmap,
    contentDescription: String?,
    modifier: Modifier,
    tint: Color
)

A Material Design icon component that draws bitmap using tint, with a default value of LocalContentColor.

Cmn
Unit
@Composable
@NonRestartableComposable
Icon(
    imageVector: ImageVector,
    contentDescription: String?,
    modifier: Modifier,
    tint: Color
)

A Material Design icon component that draws imageVector using tint, with a default value of LocalContentColor.

Cmn
Unit
@Composable
Icon(
    painter: Painter,
    contentDescription: String?,
    modifier: Modifier,
    tint: Color
)

A Material Design icon component that draws painter using tint, with a default value of LocalContentColor.

Cmn
Unit
@Composable
IconButton(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    content: @Composable () -> Unit
)

IconButton is a clickable icon, used to represent actions.

Cmn
Unit
@Composable
IconToggleButton(
    checked: Boolean,
    onCheckedChange: (Boolean) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    content: @Composable () -> Unit
)

An IconButton with two states, for icons that can be toggled 'on' and 'off', such as a bookmark icon, or a navigation icon that opens a drawer.

Cmn
Unit
@Composable
LeadingIconTab(
    selected: Boolean,
    onClick: () -> Unit,
    text: @Composable () -> Unit,
    icon: @Composable () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    selectedContentColor: Color,
    unselectedContentColor: Color
)

Material Design tab.

Cmn
Unit
@Composable
LinearProgressIndicator(
    modifier: Modifier,
    color: Color,
    backgroundColor: Color,
    strokeCap: StrokeCap
)

Indeterminate Material Design linear progress indicator.

Cmn
Unit
@Composable
LinearProgressIndicator(
    progress: @FloatRange(from = 0.0, to = 1.0) Float,
    modifier: Modifier,
    color: Color,
    backgroundColor: Color,
    strokeCap: StrokeCap
)

Determinate Material Design linear progress indicator.

Cmn
Unit
@Composable
@ExperimentalMaterialApi
ListItem(
    modifier: Modifier,
    icon: (@Composable () -> Unit)?,
    secondaryText: (@Composable () -> Unit)?,
    singleLineSecondaryText: Boolean,
    overlineText: (@Composable () -> Unit)?,
    trailing: (@Composable () -> Unit)?,
    text: @Composable () -> Unit
)

Material Design list item.

Cmn
Unit
@Composable
MaterialTheme(
    colors: Colors,
    typography: Typography,
    shapes: Shapes,
    content: @Composable () -> Unit
)

Material Theming.

Cmn
Unit
@Composable
ModalBottomSheetLayout(
    sheetContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier,
    sheetState: ModalBottomSheetState,
    sheetGesturesEnabled: Boolean,
    sheetShape: Shape,
    sheetElevation: Dp,
    sheetBackgroundColor: Color,
    sheetContentColor: Color,
    scrimColor: Color,
    content: @Composable () -> Unit
)

Material Design modal bottom sheet.

Cmn
Unit
@Composable
ModalDrawer(
    drawerContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier,
    drawerState: DrawerState,
    gesturesEnabled: Boolean,
    drawerShape: Shape,
    drawerElevation: Dp,
    drawerBackgroundColor: Color,
    drawerContentColor: Color,
    scrimColor: Color,
    content: @Composable () -> Unit
)

Material Design modal navigation drawer.

Cmn
Unit
@Composable
NavigationRail(
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp,
    header: (@Composable ColumnScope.() -> Unit)?,
    content: @Composable ColumnScope.() -> Unit
)

Material Design navigation rail.

Cmn
Unit
@Composable
NavigationRail(
    windowInsets: WindowInsets,
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp,
    header: (@Composable ColumnScope.() -> Unit)?,
    content: @Composable ColumnScope.() -> Unit
)

Material Design navigation rail.

Cmn
Unit
@Composable
NavigationRailItem(
    selected: Boolean,
    onClick: () -> Unit,
    icon: @Composable () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    label: (@Composable () -> Unit)?,
    alwaysShowLabel: Boolean,
    interactionSource: MutableInteractionSource?,
    selectedContentColor: Color,
    unselectedContentColor: Color
)

Material Design navigation rail item.

Cmn
Unit
@Composable
@NonRestartableComposable
OutlinedButton(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    elevation: ButtonElevation?,
    shape: Shape,
    border: BorderStroke?,
    colors: ButtonColors,
    contentPadding: PaddingValues,
    content: @Composable RowScope.() -> Unit
)

Material Design outlined button.

Cmn
Unit
@Composable
OutlinedTextField(
    value: String,
    onValueChange: (String) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    readOnly: Boolean,
    textStyle: TextStyle,
    label: (@Composable () -> Unit)?,
    placeholder: (@Composable () -> Unit)?,
    leadingIcon: (@Composable () -> Unit)?,
    trailingIcon: (@Composable () -> Unit)?,
    isError: Boolean,
    visualTransformation: VisualTransformation,
    keyboardOptions: KeyboardOptions,
    keyboardActions: KeyboardActions,
    singleLine: Boolean,
    maxLines: Int,
    minLines: Int,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    colors: TextFieldColors
)

Material Design outlined text field.

Cmn
Unit
@Composable
OutlinedTextField(
    value: TextFieldValue,
    onValueChange: (TextFieldValue) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    readOnly: Boolean,
    textStyle: TextStyle,
    label: (@Composable () -> Unit)?,
    placeholder: (@Composable () -> Unit)?,
    leadingIcon: (@Composable () -> Unit)?,
    trailingIcon: (@Composable () -> Unit)?,
    isError: Boolean,
    visualTransformation: VisualTransformation,
    keyboardOptions: KeyboardOptions,
    keyboardActions: KeyboardActions,
    singleLine: Boolean,
    maxLines: Int,
    minLines: Int,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    colors: TextFieldColors
)

Material Design outlined text field.

Cmn
Unit

This function is used to set the current value of LocalTextStyle, merging the given style with the current style values for any missing attributes.

Cmn
Unit
@Composable
RadioButton(
    selected: Boolean,
    onClick: (() -> Unit)?,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    colors: RadioButtonColors
)

Material Design radio button.

Cmn
Unit
@Composable
@ExperimentalMaterialApi
RangeSlider(
    value: ClosedFloatingPointRange<Float>,
    onValueChange: (ClosedFloatingPointRange<Float>) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    valueRange: ClosedFloatingPointRange<Float>,
    steps: @IntRange(from = 0) Int,
    onValueChangeFinished: (() -> Unit)?,
    colors: SliderColors
)

Material Design slider.

Cmn
Unit
@Composable
Scaffold(
    modifier: Modifier,
    scaffoldState: ScaffoldState,
    topBar: @Composable () -> Unit,
    bottomBar: @Composable () -> Unit,
    snackbarHost: @Composable (SnackbarHostState) -> Unit,
    floatingActionButton: @Composable () -> Unit,
    floatingActionButtonPosition: FabPosition,
    isFloatingActionButtonDocked: Boolean,
    drawerContent: (@Composable ColumnScope.() -> Unit)?,
    drawerGesturesEnabled: Boolean,
    drawerShape: Shape,
    drawerElevation: Dp,
    drawerBackgroundColor: Color,
    drawerContentColor: Color,
    drawerScrimColor: Color,
    backgroundColor: Color,
    contentColor: Color,
    content: @Composable (PaddingValues) -> Unit
)

Material Design layout.

Cmn
Unit
@Composable
Scaffold(
    contentWindowInsets: WindowInsets,
    modifier: Modifier,
    scaffoldState: ScaffoldState,
    topBar: @Composable () -> Unit,
    bottomBar: @Composable () -> Unit,
    snackbarHost: @Composable (SnackbarHostState) -> Unit,
    floatingActionButton: @Composable () -> Unit,
    floatingActionButtonPosition: FabPosition,
    isFloatingActionButtonDocked: Boolean,
    drawerContent: (@Composable ColumnScope.() -> Unit)?,
    drawerGesturesEnabled: Boolean,
    drawerShape: Shape,
    drawerElevation: Dp,
    drawerBackgroundColor: Color,
    drawerContentColor: Color,
    drawerScrimColor: Color,
    backgroundColor: Color,
    contentColor: Color,
    content: @Composable (PaddingValues) -> Unit
)

Material Design layout.

Cmn
Unit
@Composable
@UiComposable
ScrollableTabRow(
    selectedTabIndex: Int,
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    edgePadding: Dp,
    indicator: @Composable @UiComposable (tabPositions: List<TabPosition>) -> Unit,
    divider: @Composable @UiComposable () -> Unit,
    tabs: @Composable @UiComposable () -> Unit
)

Material Design scrollable tabs.

Cmn
Unit
@Composable
Slider(
    value: Float,
    onValueChange: (Float) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    valueRange: ClosedFloatingPointRange<Float>,
    steps: @IntRange(from = 0) Int,
    onValueChangeFinished: (() -> Unit)?,
    interactionSource: MutableInteractionSource?,
    colors: SliderColors
)

Material Design slider.

Cmn
Unit
@Composable
Snackbar(
    modifier: Modifier,
    action: (@Composable () -> Unit)?,
    actionOnNewLine: Boolean,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp,
    content: @Composable () -> Unit
)

Material Design snackbar.

Cmn
Unit
@Composable
Snackbar(
    snackbarData: SnackbarData,
    modifier: Modifier,
    actionOnNewLine: Boolean,
    shape: Shape,
    backgroundColor: Color,
    contentColor: Color,
    actionColor: Color,
    elevation: Dp
)

Material Design snackbar.

Cmn
Unit
@Composable
SnackbarHost(
    hostState: SnackbarHostState,
    modifier: Modifier,
    snackbar: @Composable (SnackbarData) -> Unit
)

Host for Snackbars to be used in Scaffold to properly show, hide and dismiss items based on material specification and the hostState.

Cmn
Unit
@Composable
Surface(
    modifier: Modifier,
    shape: Shape,
    color: Color,
    contentColor: Color,
    border: BorderStroke?,
    elevation: Dp,
    content: @Composable () -> Unit
)

Material Design surface.

Cmn
Unit
@ExperimentalMaterialApi
@Composable
Surface(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    shape: Shape,
    color: Color,
    contentColor: Color,
    border: BorderStroke?,
    elevation: Dp,
    interactionSource: MutableInteractionSource?,
    content: @Composable () -> Unit
)

Material surface is the central metaphor in material design.

Cmn
Unit
@ExperimentalMaterialApi
@Composable
Surface(
    checked: Boolean,
    onCheckedChange: (Boolean) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    shape: Shape,
    color: Color,
    contentColor: Color,
    border: BorderStroke?,
    elevation: Dp,
    interactionSource: MutableInteractionSource?,
    content: @Composable () -> Unit
)

Material surface is the central metaphor in material design.

Cmn
Unit
@ExperimentalMaterialApi
@Composable
Surface(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    shape: Shape,
    color: Color,
    contentColor: Color,
    border: BorderStroke?,
    elevation: Dp,
    interactionSource: MutableInteractionSource?,
    content: @Composable () -> Unit
)

Material surface is the central metaphor in material design.

Cmn
Unit
@Composable
@ExperimentalMaterialApi
@<Error class: unknown class>
SwipeToDismiss(
    state: DismissState,
    modifier: Modifier,
    directions: Set<DismissDirection>,
    dismissThresholds: (DismissDirection) -> ThresholdConfig,
    background: @Composable RowScope.() -> Unit,
    dismissContent: @Composable RowScope.() -> Unit
)

A composable that can be dismissed by swiping left or right.

Cmn
Unit
@Composable
Switch(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    colors: SwitchColors
)

Material Design switch.

Cmn
Unit
@Composable
Tab(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    selectedContentColor: Color,
    unselectedContentColor: Color,
    content: @Composable ColumnScope.() -> Unit
)

Material Design tab.

Cmn
Unit
@Composable
Tab(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    text: (@Composable () -> Unit)?,
    icon: (@Composable () -> Unit)?,
    interactionSource: MutableInteractionSource?,
    selectedContentColor: Color,
    unselectedContentColor: Color
)

Material Design tab.

Cmn
Unit
@Composable
@UiComposable
TabRow(
    selectedTabIndex: Int,
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    indicator: @Composable @UiComposable (tabPositions: List<TabPosition>) -> Unit,
    divider: @Composable @UiComposable () -> Unit,
    tabs: @Composable @UiComposable () -> Unit
)

Material Design fixed tabs.

Cmn
Unit
@Composable
Text(
    text: String,
    modifier: Modifier,
    color: Color,
    fontSize: TextUnit,
    fontStyle: FontStyle?,
    fontWeight: FontWeight?,
    fontFamily: FontFamily?,
    letterSpacing: TextUnit,
    textDecoration: TextDecoration?,
    textAlign: TextAlign?,
    lineHeight: TextUnit,
    overflow: TextOverflow,
    softWrap: Boolean,
    maxLines: Int,
    minLines: Int,
    onTextLayout: ((TextLayoutResult) -> Unit)?,
    style: TextStyle
)

High level element that displays text and provides semantics / accessibility information.

Cmn
Unit
@Composable
Text(
    text: AnnotatedString,
    modifier: Modifier,
    color: Color,
    fontSize: TextUnit,
    fontStyle: FontStyle?,
    fontWeight: FontWeight?,
    fontFamily: FontFamily?,
    letterSpacing: TextUnit,
    textDecoration: TextDecoration?,
    textAlign: TextAlign?,
    lineHeight: TextUnit,
    overflow: TextOverflow,
    softWrap: Boolean,
    maxLines: Int,
    minLines: Int,
    inlineContent: Map<StringInlineTextContent>,
    onTextLayout: (TextLayoutResult) -> Unit,
    style: TextStyle
)

High level element that displays text and provides semantics / accessibility information.

Cmn
Unit
@Composable
@NonRestartableComposable
TextButton(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    elevation: ButtonElevation?,
    shape: Shape,
    border: BorderStroke?,
    colors: ButtonColors,
    contentPadding: PaddingValues,
    content: @Composable RowScope.() -> Unit
)

Material Design text button.

Cmn
Unit
@Composable
TextField(
    value: String,
    onValueChange: (String) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    readOnly: Boolean,
    textStyle: TextStyle,
    label: (@Composable () -> Unit)?,
    placeholder: (@Composable () -> Unit)?,
    leadingIcon: (@Composable () -> Unit)?,
    trailingIcon: (@Composable () -> Unit)?,
    isError: Boolean,
    visualTransformation: VisualTransformation,
    keyboardOptions: KeyboardOptions,
    keyboardActions: KeyboardActions,
    singleLine: Boolean,
    maxLines: Int,
    minLines: Int,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    colors: TextFieldColors
)

Material Design filled text field.

Cmn
Unit
@Composable
TextField(
    value: TextFieldValue,
    onValueChange: (TextFieldValue) -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    readOnly: Boolean,
    textStyle: TextStyle,
    label: (@Composable () -> Unit)?,
    placeholder: (@Composable () -> Unit)?,
    leadingIcon: (@Composable () -> Unit)?,
    trailingIcon: (@Composable () -> Unit)?,
    isError: Boolean,
    visualTransformation: VisualTransformation,
    keyboardOptions: KeyboardOptions,
    keyboardActions: KeyboardActions,
    singleLine: Boolean,
    maxLines: Int,
    minLines: Int,
    interactionSource: MutableInteractionSource?,
    shape: Shape,
    colors: TextFieldColors
)

Material Design filled text field.

Cmn
Unit
@Composable
TopAppBar(
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp,
    contentPadding: PaddingValues,
    content: @Composable RowScope.() -> Unit
)

Material Design top app bar.

Cmn
Unit
@Composable
TopAppBar(
    title: @Composable () -> Unit,
    modifier: Modifier,
    navigationIcon: (@Composable () -> Unit)?,
    actions: @Composable RowScope.() -> Unit,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp
)

Material Design top app bar.

Cmn
Unit
@Composable
TopAppBar(
    windowInsets: WindowInsets,
    modifier: Modifier,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp,
    contentPadding: PaddingValues,
    content: @Composable RowScope.() -> Unit
)

Material Design top app bar.

Cmn
Unit
@Composable
TopAppBar(
    title: @Composable () -> Unit,
    windowInsets: WindowInsets,
    modifier: Modifier,
    navigationIcon: (@Composable () -> Unit)?,
    actions: @Composable RowScope.() -> Unit,
    backgroundColor: Color,
    contentColor: Color,
    elevation: Dp
)

Material Design top app bar.

Cmn
Unit
@Composable
TriStateCheckbox(
    state: ToggleableState,
    onClick: (() -> Unit)?,
    modifier: Modifier,
    enabled: Boolean,
    interactionSource: MutableInteractionSource?,
    colors: CheckboxColors
)

Material Design checkbox parent.

Cmn
Color
@Composable
contentColorFor(backgroundColor: Color)

The Material color system contains pairs of colors that are typically used for the background and content color inside a component.

Cmn
Colors
darkColors(
    primary: Color,
    primaryVariant: Color,
    secondary: Color,
    secondaryVariant: Color,
    background: Color,
    surface: Color,
    error: Color,
    onPrimary: Color,
    onSecondary: Color,
    onBackground: Color,
    onSurface: Color,
    onError: Color
)

Creates a complete color definition for the Material color specification using the default dark theme values.

Cmn
Colors
lightColors(
    primary: Color,
    primaryVariant: Color,
    secondary: Color,
    secondaryVariant: Color,
    background: Color,
    surface: Color,
    error: Color,
    onPrimary: Color,
    onSecondary: Color,
    onBackground: Color,
    onSurface: Color,
    onError: Color
)

Creates a complete color definition for the Material color specification using the default light theme values.

Cmn
BackdropScaffoldState
@Composable
rememberBackdropScaffoldState(
    initialValue: BackdropValue,
    animationSpec: AnimationSpec<Float>,
    confirmStateChange: (BackdropValue) -> Boolean,
    snackbarHostState: SnackbarHostState
)

Create and remember a BackdropScaffoldState.

Cmn
BottomDrawerState
@Composable
rememberBottomDrawerState(
    initialValue: BottomDrawerValue,
    confirmStateChange: (BottomDrawerValue) -> Boolean,
    animationSpec: AnimationSpec<Float>
)

Create and remember a BottomDrawerState.

Cmn
BottomSheetScaffoldState
@Composable
rememberBottomSheetScaffoldState(
    bottomSheetState: BottomSheetState,
    snackbarHostState: SnackbarHostState
)

Create and remember a BottomSheetScaffoldState.

Cmn
BottomSheetState
@Composable
rememberBottomSheetState(
    initialValue: BottomSheetValue,
    animationSpec: AnimationSpec<Float>,
    confirmStateChange: (BottomSheetValue) -> Boolean
)

Create a BottomSheetState and remember it.

Cmn
DismissState
@Composable
@ExperimentalMaterialApi
rememberDismissState(
    initialValue: DismissValue,
    confirmStateChange: (DismissValue) -> Boolean
)

Create and remember a DismissState.

Cmn
DrawerState
@Composable
rememberDrawerState(
    initialValue: DrawerValue,
    confirmStateChange: (DrawerValue) -> Boolean
)

Create and remember a DrawerState.

Cmn
ModalBottomSheetState
@Composable
rememberModalBottomSheetState(
    initialValue: ModalBottomSheetValue,
    animationSpec: AnimationSpec<Float>,
    confirmValueChange: (ModalBottomSheetValue) -> Boolean,
    skipHalfExpanded: Boolean
)

Create a ModalBottomSheetState and remember it.

Cmn
ScaffoldState
@Composable
rememberScaffoldState(
    drawerState: DrawerState,
    snackbarHostState: SnackbarHostState
)

Creates a ScaffoldState with the default animation clock and memoizes it.

Cmn
SwipeableState<T>
@Composable
@ExperimentalMaterialApi
<T : Any> rememberSwipeableState(
    initialValue: T,
    animationSpec: AnimationSpec<Float>,
    confirmStateChange: (newValue) -> Boolean
)

This function is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn
IndicationNodeFactory
ripple(bounded: Boolean, radius: Dp, color: Color)

Creates a Ripple using the provided values and values inferred from the theme.

Cmn
IndicationNodeFactory
ripple(color: ColorProducer, bounded: Boolean, radius: Dp)

Creates a Ripple using the provided values and values inferred from the theme.

Cmn

Extension functions summary

Unit
@Composable
RowScope.BottomNavigationItem(
    selected: Boolean,
    onClick: () -> Unit,
    icon: @Composable () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    label: (@Composable () -> Unit)?,
    alwaysShowLabel: Boolean,
    interactionSource: MutableInteractionSource?,
    selectedContentColor: Color,
    unselectedContentColor: Color
)

Material Design bottom navigation item.

Cmn
Color
Colors.contentColorFor(backgroundColor: Color)

The Material color system contains pairs of colors that are typically used for the background and content color inside a component.

Cmn
Modifier

Reserves at least 48.dp in size to disambiguate touch interactions if the element would measure smaller.

Cmn
Modifier
@ExperimentalMaterialApi
<T : Any?> Modifier.swipeable(
    state: SwipeableState<T>,
    anchors: Map<Float, T>,
    orientation: Orientation,
    enabled: Boolean,
    reverseDirection: Boolean,
    interactionSource: MutableInteractionSource?,
    thresholds: (from, to) -> ThresholdConfig,
    resistance: ResistanceConfig?,
    velocityThreshold: Dp
)

This function is deprecated. Material's Swipeable has been replaced by Foundation's AnchoredDraggable APIs.

Cmn

Top-level properties summary

ProvidableCompositionLocal<Dp>

CompositionLocal containing the current absolute elevation provided by Surface components.

Cmn
ProvidableCompositionLocal<Float>

CompositionLocal containing the preferred content alpha for a given position in the hierarchy.

Cmn
ProvidableCompositionLocal<Color>

CompositionLocal containing the preferred content color for a given position in the hierarchy.

Cmn
ProvidableCompositionLocal<ElevationOverlay?>

CompositionLocal containing the ElevationOverlay used by Surface components.

Cmn
ProvidableCompositionLocal<Boolean>

CompositionLocal that configures whether Material components that have a visual size that is lower than the minimum touch target size for accessibility (such as Button) will include extra space outside the component to ensure that they are accessible.

Cmn
ProvidableCompositionLocal<Boolean>

This property is deprecated. Use LocalMinimumInteractiveComponentEnforcement instead.

Cmn
ProvidableCompositionLocal<RippleConfiguration>

CompositionLocal used for providing RippleConfiguration down the tree.

Cmn
ProvidableCompositionLocal<TextStyle>

CompositionLocal containing the preferred TextStyle that will be used by Text components by default.

Cmn
ProvidableCompositionLocal<Boolean>

Temporary CompositionLocal to allow configuring whether the old ripple implementation that uses the deprecated androidx.compose.material.ripple.RippleTheme API should be used in Material components and LocalIndication, instead of the new ripple API.

Cmn
Boolean

Flag indicating if Scaffold should subcompose and measure its children during measurement or during placement.

Cmn

Extension properties summary

Color

primarySurface represents the background color of components that are Colors.primary in light theme, and Colors.surface in dark theme, such as androidx.compose.material.TabRow and androidx.compose.material.TopAppBar.

Cmn

Top-level functions

AlertDialog

@Composable
@ExperimentalMaterialApi
fun AlertDialog(
    onDismissRequest: () -> Unit,
    buttons: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    title: (@Composable () -> Unit)? = null,
    text: (@Composable () -> Unit)? = null,
    shape: Shape = MaterialTheme.shapes.medium,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    dialogProvider: AlertDialogProvider = PopupAlertDialogProvider
): Unit

Alert dialog is a Dialog which interrupts the user with urgent information, details or actions.

This function can be used to fully customize the button area, e.g. with:

import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.material.AlertDialog
import androidx.compose.material.Button
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val openDialog = remember { mutableStateOf(true) }

if (openDialog.value) {
    AlertDialog(
        onDismissRequest = {
            openDialog.value = false
        },
        title = {
            Text(text = "Title")
        },
        text = {
            Text(
                "This area typically contains the supportive text " +
                    "which presents the details regarding the Dialog's purpose."
            )
        },
        buttons = {
            Row(
                modifier = Modifier.padding(all = 8.dp),
                horizontalArrangement = Arrangement.Center
            ) {
                Button(
                    modifier = Modifier.fillMaxWidth(),
                    onClick = { openDialog.value = false }
                ) {
                    Text("Dismiss")
                }
            }
        }
    )
}
Parameters
onDismissRequest: () -> Unit

Callback that will be called when the user closes the dialog.

buttons: @Composable () -> Unit

Function that emits the layout with the buttons.

modifier: Modifier = Modifier

Modifier to be applied to the layout of the dialog.

title: (@Composable () -> Unit)? = null

The title of the Dialog which should specify the purpose of the Dialog. The title is not mandatory, because there may be sufficient information inside the text. Provided text style will be Typography.subtitle1.

text: (@Composable () -> Unit)? = null

The text which presents the details regarding the Dialog's purpose. Provided text style will be Typography.body2.

shape: Shape = MaterialTheme.shapes.medium

Defines the Dialog's shape.

backgroundColor: Color = MaterialTheme.colors.surface

The background color of the dialog.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this dialog to its children.

dialogProvider: AlertDialogProvider = PopupAlertDialogProvider

Defines how to create dialog in which will be placed AlertDialog's content.

AlertDialog

@Composable
fun AlertDialog(
    onDismissRequest: () -> Unit,
    buttons: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    title: (@Composable () -> Unit)? = null,
    text: (@Composable () -> Unit)? = null,
    shape: Shape = MaterialTheme.shapes.medium,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    properties: DialogProperties = DialogProperties()
): Unit

Material Design alert dialog.

Alert dialogs interrupt users with urgent information, details, or actions.

Dialogs image

This function can be used to fully customize the button area, e.g. with:

import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.material.AlertDialog
import androidx.compose.material.Button
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val openDialog = remember { mutableStateOf(true) }

if (openDialog.value) {
    AlertDialog(
        onDismissRequest = {
            openDialog.value = false
        },
        title = {
            Text(text = "Title")
        },
        text = {
            Text(
                "This area typically contains the supportive text " +
                    "which presents the details regarding the Dialog's purpose."
            )
        },
        buttons = {
            Row(
                modifier = Modifier.padding(all = 8.dp),
                horizontalArrangement = Arrangement.Center
            ) {
                Button(
                    modifier = Modifier.fillMaxWidth(),
                    onClick = { openDialog.value = false }
                ) {
                    Text("Dismiss")
                }
            }
        }
    )
}
Parameters
onDismissRequest: () -> Unit

Executes when the user tries to dismiss the Dialog by clicking outside or pressing the back button. This is not called when the dismiss button is clicked.

buttons: @Composable () -> Unit

Function that emits the layout with the buttons.

modifier: Modifier = Modifier

Modifier to be applied to the layout of the dialog.

title: (@Composable () -> Unit)? = null

The title of the Dialog which should specify the purpose of the Dialog. The title is not mandatory, because there may be sufficient information inside the text. Provided text style will be Typography.subtitle1.

text: (@Composable () -> Unit)? = null

The text which presents the details regarding the Dialog's purpose. Provided text style will be Typography.body2.

shape: Shape = MaterialTheme.shapes.medium

Defines the Dialog's shape.

backgroundColor: Color = MaterialTheme.colors.surface

The background color of the dialog.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this dialog to its children.

properties: DialogProperties = DialogProperties()

Typically platform specific properties to further configure the dialog.

AlertDialog

@Composable
@ExperimentalMaterialApi
fun AlertDialog(
    onDismissRequest: () -> Unit,
    confirmButton: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    dismissButton: (@Composable () -> Unit)? = null,
    title: (@Composable () -> Unit)? = null,
    text: (@Composable () -> Unit)? = null,
    shape: Shape = MaterialTheme.shapes.medium,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    dialogProvider: AlertDialogProvider = PopupAlertDialogProvider
): Unit

Alert dialog is a Dialog which interrupts the user with urgent information, details or actions.

The dialog will position its buttons based on the available space. By default it will try to place them horizontally next to each other and fallback to horizontal placement if not enough space is available. There is also another version of this composable that has a slot for buttons to provide custom buttons layout.

Sample of dialog:

import androidx.compose.material.AlertDialog
import androidx.compose.material.Text
import androidx.compose.material.TextButton
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val openDialog = remember { mutableStateOf(true) }

if (openDialog.value) {
    AlertDialog(
        onDismissRequest = {
            // Dismiss the dialog when the user clicks outside the dialog or on the back
            // button. If you want to disable that functionality, simply use an empty
            // onCloseRequest.
            openDialog.value = false
        },
        title = {
            Text(text = "Title")
        },
        text = {
            Text(
                "This area typically contains the supportive text " +
                    "which presents the details regarding the Dialog's purpose."
            )
        },
        confirmButton = {
            TextButton(
                onClick = {
                    openDialog.value = false
                }
            ) {
                Text("Confirm")
            }
        },
        dismissButton = {
            TextButton(
                onClick = {
                    openDialog.value = false
                }
            ) {
                Text("Dismiss")
            }
        }
    )
}
Parameters
onDismissRequest: () -> Unit

Callback that will be called when the user closes the dialog.

confirmButton: @Composable () -> Unit

A button which is meant to confirm a proposed action, thus resolving what triggered the dialog. The dialog does not set up any events for this button so they need to be set up by the caller.

modifier: Modifier = Modifier

Modifier to be applied to the layout of the dialog.

dismissButton: (@Composable () -> Unit)? = null

A button which is meant to dismiss the dialog. The dialog does not set up any events for this button so they need to be set up by the caller.

title: (@Composable () -> Unit)? = null

The title of the Dialog which should specify the purpose of the Dialog. The title is not mandatory, because there may be sufficient information inside the text. Provided text style will be Typography.subtitle1.

text: (@Composable () -> Unit)? = null

The text which presents the details regarding the Dialog's purpose. Provided text style will be Typography.body2.

shape: Shape = MaterialTheme.shapes.medium

Defines the Dialog's shape

backgroundColor: Color = MaterialTheme.colors.surface

The background color of the dialog.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this dialog to its children.

dialogProvider: AlertDialogProvider = PopupAlertDialogProvider

Defines how to create dialog in which will be placed AlertDialog's content.

AlertDialog

@Composable
fun AlertDialog(
    onDismissRequest: () -> Unit,
    confirmButton: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    dismissButton: (@Composable () -> Unit)? = null,
    title: (@Composable () -> Unit)? = null,
    text: (@Composable () -> Unit)? = null,
    shape: Shape = MaterialTheme.shapes.medium,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    properties: DialogProperties = DialogProperties()
): Unit

Material Design alert dialog.

Alert dialogs interrupt users with urgent information, details, or actions.

Dialogs image

The dialog will position its buttons based on the available space. By default it will try to place them horizontally next to each other and fallback to horizontal placement if not enough space is available. There is also another version of this composable that has a slot for buttons to provide custom buttons layout.

Sample of dialog:

import androidx.compose.material.AlertDialog
import androidx.compose.material.Text
import androidx.compose.material.TextButton
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val openDialog = remember { mutableStateOf(true) }

if (openDialog.value) {
    AlertDialog(
        onDismissRequest = {
            // Dismiss the dialog when the user clicks outside the dialog or on the back
            // button. If you want to disable that functionality, simply use an empty
            // onCloseRequest.
            openDialog.value = false
        },
        title = {
            Text(text = "Title")
        },
        text = {
            Text(
                "This area typically contains the supportive text " +
                    "which presents the details regarding the Dialog's purpose."
            )
        },
        confirmButton = {
            TextButton(
                onClick = {
                    openDialog.value = false
                }
            ) {
                Text("Confirm")
            }
        },
        dismissButton = {
            TextButton(
                onClick = {
                    openDialog.value = false
                }
            ) {
                Text("Dismiss")
            }
        }
    )
}
Parameters
onDismissRequest: () -> Unit

Executes when the user tries to dismiss the Dialog by clicking outside or pressing the back button. This is not called when the dismiss button is clicked.

confirmButton: @Composable () -> Unit

A button which is meant to confirm a proposed action, thus resolving what triggered the dialog. The dialog does not set up any events for this button so they need to be set up by the caller.

modifier: Modifier = Modifier

Modifier to be applied to the layout of the dialog.

dismissButton: (@Composable () -> Unit)? = null

A button which is meant to dismiss the dialog. The dialog does not set up any events for this button so they need to be set up by the caller.

title: (@Composable () -> Unit)? = null

The title of the Dialog which should specify the purpose of the Dialog. The title is not mandatory, because there may be sufficient information inside the text. Provided text style will be Typography.subtitle1.

text: (@Composable () -> Unit)? = null

The text which presents the details regarding the Dialog's purpose. Provided text style will be Typography.body2.

shape: Shape = MaterialTheme.shapes.medium

Defines the Dialog's shape

backgroundColor: Color = MaterialTheme.colors.surface

The background color of the dialog.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this dialog to its children.

properties: DialogProperties = DialogProperties()

Typically platform specific properties to further configure the dialog.

BackdropScaffold

@Composable
fun BackdropScaffold(
    appBar: @Composable () -> Unit,
    backLayerContent: @Composable () -> Unit,
    frontLayerContent: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    scaffoldState: BackdropScaffoldState = rememberBackdropScaffoldState(Concealed),
    snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) },
    gesturesEnabled: Boolean = true,
    peekHeight: Dp = BackdropScaffoldDefaults.PeekHeight,
    headerHeight: Dp = BackdropScaffoldDefaults.HeaderHeight,
    persistentAppBar: Boolean = true,
    stickyFrontLayer: Boolean = true,
    backLayerBackgroundColor: Color = MaterialTheme.colors.primary,
    backLayerContentColor: Color = contentColorFor(backLayerBackgroundColor),
    frontLayerShape: Shape = BackdropScaffoldDefaults.frontLayerShape,
    frontLayerElevation: Dp = BackdropScaffoldDefaults.FrontLayerElevation,
    frontLayerBackgroundColor: Color = MaterialTheme.colors.surface,
    frontLayerContentColor: Color = contentColorFor(frontLayerBackgroundColor),
    frontLayerScrimColor: Color = BackdropScaffoldDefaults.frontLayerScrimColor
): Unit

Material Design backdrop.

A backdrop appears behind all other surfaces in an app, displaying contextual and actionable content.

Backdrop image

This component provides an API to put together several material components to construct your screen. For a similar component which implements the basic material design layout strategy with app bars, floating action buttons and navigation drawers, use the standard Scaffold. For similar component that uses a bottom sheet as the centerpiece of the screen, use BottomSheetScaffold.

Either the back layer or front layer can be active at a time. When the front layer is active, it sits at an offset below the top of the screen. This is the peekHeight and defaults to 56dp which is the default app bar height. When the front layer is inactive, it sticks to the height of the back layer's content if stickyFrontLayer is set to true and the height of the front layer exceeds the headerHeight, and otherwise it minimizes to the headerHeight. To switch between the back layer and front layer, you can either swipe on the front layer if gesturesEnabled is set to true or use any of the methods in BackdropScaffoldState.

The scaffold also contains an app bar, which by default is placed above the back layer's content. If persistentAppBar is set to false, then the backdrop will not show the app bar when the back layer is revealed; instead it will switch between the app bar and the provided content with an animation. For best results, the peekHeight should match the app bar height. To show a snackbar, use the method showSnackbar of BackdropScaffoldState.snackbarHostState.

A simple example of a backdrop scaffold looks like this:

import androidx.compose.foundation.clickable
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material.BackdropScaffold
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.ListItem
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.rememberBackdropScaffoldState
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scope = rememberCoroutineScope()
val selection = remember { mutableStateOf(1) }
val scaffoldState = rememberBackdropScaffoldState(BackdropValue.Concealed)
LaunchedEffect(scaffoldState) {
    scaffoldState.reveal()
}
BackdropScaffold(
    scaffoldState = scaffoldState,
    appBar = {
        TopAppBar(
            title = { Text("Backdrop scaffold") },
            navigationIcon = {
                if (scaffoldState.isConcealed) {
                    IconButton(onClick = { scope.launch { scaffoldState.reveal() } }) {
                        Icon(Icons.Default.Menu, contentDescription = "Localized description")
                    }
                } else {
                    IconButton(onClick = { scope.launch { scaffoldState.conceal() } }) {
                        Icon(Icons.Default.Close, contentDescription = "Localized description")
                    }
                }
            },
            actions = {
                var clickCount by remember { mutableStateOf(0) }
                IconButton(
                    onClick = {
                        // show snackbar as a suspend function
                        scope.launch {
                            scaffoldState.snackbarHostState
                                .showSnackbar("Snackbar #${++clickCount}")
                        }
                    }
                ) {
                    Icon(Icons.Default.Favorite, contentDescription = "Localized description")
                }
            },
            elevation = 0.dp,
            backgroundColor = Color.Transparent
        )
    },
    backLayerContent = {
        LazyColumn {
            items(if (selection.value >= 3) 3 else 5) {
                ListItem(
                    Modifier.clickable {
                        selection.value = it
                        scope.launch { scaffoldState.conceal() }
                    },
                    text = { Text("Select $it") }
                )
            }
        }
    },
    frontLayerContent = {
        Text("Selection: ${selection.value}")
        LazyColumn {
            items(50) {
                ListItem(
                    text = { Text("Item $it") },
                    icon = {
                        Icon(
                            Icons.Default.Favorite,
                            contentDescription = "Localized description"
                        )
                    }
                )
            }
        }
    }
)
Parameters
appBar: @Composable () -> Unit

App bar for the back layer. Make sure that the peekHeight is equal to the height of the app bar, so that the app bar is fully visible. Consider using TopAppBar but set the elevation to 0dp and background color to transparent as a surface is already provided.

backLayerContent: @Composable () -> Unit

The content of the back layer.

frontLayerContent: @Composable () -> Unit

The content of the front layer.

modifier: Modifier = Modifier

Optional Modifier for the root of the scaffold.

scaffoldState: BackdropScaffoldState = rememberBackdropScaffoldState(Concealed)

The state of the scaffold.

snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) }

The component hosting the snackbars shown inside the scaffold.

gesturesEnabled: Boolean = true

Whether or not the backdrop can be interacted with by gestures.

peekHeight: Dp = BackdropScaffoldDefaults.PeekHeight

The height of the visible part of the back layer when it is concealed.

headerHeight: Dp = BackdropScaffoldDefaults.HeaderHeight

The minimum height of the front layer when it is inactive.

persistentAppBar: Boolean = true

Whether the app bar should be shown when the back layer is revealed. By default, it will always be shown above the back layer's content. If this is set to false, the back layer will automatically switch between the app bar and its content with an animation.

stickyFrontLayer: Boolean = true

Whether the front layer should stick to the height of the back layer.

backLayerBackgroundColor: Color = MaterialTheme.colors.primary

The background color of the back layer.

backLayerContentColor: Color = contentColorFor(backLayerBackgroundColor)

The preferred content color provided by the back layer to its children. Defaults to the matching content color for backLayerBackgroundColor, or if that is not a color from the theme, this will keep the same content color set above the back layer.

frontLayerShape: Shape = BackdropScaffoldDefaults.frontLayerShape

The shape of the front layer.

frontLayerElevation: Dp = BackdropScaffoldDefaults.FrontLayerElevation

The elevation of the front layer.

frontLayerBackgroundColor: Color = MaterialTheme.colors.surface

The background color of the front layer.

frontLayerContentColor: Color = contentColorFor(frontLayerBackgroundColor)

The preferred content color provided by the back front to its children. Defaults to the matching content color for frontLayerBackgroundColor, or if that is not a color from the theme, this will keep the same content color set above the front layer.

frontLayerScrimColor: Color = BackdropScaffoldDefaults.frontLayerScrimColor

The color of the scrim applied to the front layer when the back layer is revealed. If the color passed is Color.Unspecified, then a scrim will not be applied and interaction with the front layer will not be blocked when the back layer is revealed.

BackdropScaffoldState

fun BackdropScaffoldState(
    initialValue: BackdropValue,
    density: Density,
    animationSpec: AnimationSpec<Float> = BackdropScaffoldDefaults.AnimationSpec,
    confirmValueChange: (BackdropValue) -> Boolean = { true },
    snackbarHostState: SnackbarHostState = SnackbarHostState()
): BackdropScaffoldState

State of the persistent bottom sheet in BackdropScaffold.

Parameters
initialValue: BackdropValue

The initial value of the state.

density: Density

The density that this state can use to convert values to and from dp.

animationSpec: AnimationSpec<Float> = BackdropScaffoldDefaults.AnimationSpec

The default animation that will be used to animate to a new state.

confirmValueChange: (BackdropValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

snackbarHostState: SnackbarHostState = SnackbarHostState()

The SnackbarHostState used to show snackbars inside the scaffold.

@Composable
fun Badge(
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.error,
    contentColor: Color = contentColorFor(backgroundColor),
    content: (@Composable RowScope.() -> Unit)? = null
): Unit

Badge is a component that can contain dynamic information, such as the presence of a new notification or a number of pending requests. Badges can be icon only or contain short text.

See BadgedBox for a top level layout that will properly place the badge relative to content such as text or an icon.

Parameters
modifier: Modifier = Modifier

optional Modifier for this item

backgroundColor: Color = MaterialTheme.colors.error

the background color for the badge

contentColor: Color = contentColorFor(backgroundColor)

the color of label text rendered in the badge

content: (@Composable RowScope.() -> Unit)? = null

optional content to be rendered inside the badge

BadgedBox

@Composable
fun BadgedBox(
    badge: @Composable BoxScope.() -> Unit,
    modifier: Modifier = Modifier,
    content: @Composable BoxScope.() -> Unit
): Unit

A BadgeBox is used to decorate content with a badge that can contain dynamic information, such as the presence of a new notification or a number of pending requests. Badges can be icon only or contain short text.

A common use case is to display a badge with bottom navigation items. For more information, see Bottom Navigation

A simple icon with badge example looks like:

import androidx.compose.material.Badge
import androidx.compose.material.BadgedBox
import androidx.compose.material.BottomNavigation
import androidx.compose.material.BottomNavigationItem
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.ui.semantics.semantics

BottomNavigation {
    BottomNavigationItem(
        icon = {
            BadgedBox(badge = {
                Badge {
                    val badgeNumber = "8"
                    Text(
                        badgeNumber,
                        modifier = Modifier.semantics {
                            contentDescription = "$badgeNumber new notifications"
                        }
                    )
                }
            }) {
                Icon(
                    Icons.Filled.Favorite,
                    contentDescription = "Favorite"
                )
            }
        },
        selected = false,
        onClick = {}
    )
}
Parameters
badge: @Composable BoxScope.() -> Unit

the badge to be displayed - typically a Badge

modifier: Modifier = Modifier

optional Modifier for this item

content: @Composable BoxScope.() -> Unit

the anchor to which this badge will be positioned

BottomAppBar

@Composable
fun BottomAppBar(
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    cutoutShape: Shape? = null,
    elevation: Dp = AppBarDefaults.BottomAppBarElevation,
    contentPadding: PaddingValues = AppBarDefaults.ContentPadding,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design bottom app bar.

A bottom app bar displays navigation and key actions at the bottom of screens.

App bars: bottom image

It can also optionally display a FloatingActionButton, which is either overlaid on top of the BottomAppBar, or inset, carving a cutout in the BottomAppBar.

See BottomAppBar anatomy for the recommended content depending on the FloatingActionButton position.

Note that when you pass a non-null cutoutShape this makes the AppBar shape concave. The shadows for such shapes will not be drawn on Android versions less than 10.

The LocalContentAlpha inside a BottomAppBar is ContentAlpha.medium - this is the default for trailing and overflow icons. It is recommended that any leading icons at the start of the BottomAppBar, such as a menu icon, use ContentAlpha.high instead. This is demonstrated in the sample below.

Also see BottomNavigation.

import androidx.compose.foundation.layout.Spacer
import androidx.compose.material.BottomAppBar
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.runtime.CompositionLocalProvider

BottomAppBar(windowInsets = AppBarDefaults.bottomAppBarWindowInsets) {
    // Leading icons should typically have a high content alpha
    CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.high) {
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Menu, contentDescription = "Localized description")
        }
    }
    // The actions should be at the end of the BottomAppBar. They use the default medium
    // content alpha provided by BottomAppBar
    Spacer(Modifier.weight(1f, true))
    IconButton(onClick = { /* doSomething() */ }) {
        Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
    }
    IconButton(onClick = { /* doSomething() */ }) {
        Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
    }
}
Parameters
modifier: Modifier = Modifier

The Modifier to be applied to this BottomAppBar

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the BottomAppBar. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this BottomAppBar to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this BottomAppBar.

cutoutShape: Shape? = null

the shape of the cutout that will be added to the BottomAppBar - this should typically be the same shape used inside the FloatingActionButton, when BottomAppBar and FloatingActionButton are being used together in Scaffold. This shape will be drawn with an offset around all sides. If null, where will be no cutout.

elevation: Dp = AppBarDefaults.BottomAppBarElevation

the elevation of this BottomAppBar.

contentPadding: PaddingValues = AppBarDefaults.ContentPadding

the padding applied to the content of this BottomAppBar

content: @Composable RowScope.() -> Unit

the content of this BottomAppBar. The default layout here is a Row, so content inside will be placed horizontally.

BottomAppBar

@Composable
fun BottomAppBar(
    windowInsets: WindowInsets,
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    cutoutShape: Shape? = null,
    elevation: Dp = AppBarDefaults.BottomAppBarElevation,
    contentPadding: PaddingValues = AppBarDefaults.ContentPadding,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design bottom app bar.

A bottom app bar displays navigation and key actions at the bottom of screens.

App bars: bottom image

This particular overload provides ability to specify WindowInsets. Recommended value can be found in AppBarDefaults.bottomAppBarWindowInsets.

It can also optionally display a FloatingActionButton, which is either overlaid on top of the BottomAppBar, or inset, carving a cutout in the BottomAppBar.

See BottomAppBar anatomy for the recommended content depending on the FloatingActionButton position.

Note that when you pass a non-null cutoutShape this makes the AppBar shape concave. The shadows for such shapes will not be drawn on Android versions less than 10.

The LocalContentAlpha inside a BottomAppBar is ContentAlpha.medium - this is the default for trailing and overflow icons. It is recommended that any leading icons at the start of the BottomAppBar, such as a menu icon, use ContentAlpha.high instead. This is demonstrated in the sample below.

Also see BottomNavigation.

import androidx.compose.foundation.layout.Spacer
import androidx.compose.material.BottomAppBar
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.runtime.CompositionLocalProvider

BottomAppBar(windowInsets = AppBarDefaults.bottomAppBarWindowInsets) {
    // Leading icons should typically have a high content alpha
    CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.high) {
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Menu, contentDescription = "Localized description")
        }
    }
    // The actions should be at the end of the BottomAppBar. They use the default medium
    // content alpha provided by BottomAppBar
    Spacer(Modifier.weight(1f, true))
    IconButton(onClick = { /* doSomething() */ }) {
        Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
    }
    IconButton(onClick = { /* doSomething() */ }) {
        Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
    }
}
Parameters
windowInsets: WindowInsets

a window insets that app bar will respect.

modifier: Modifier = Modifier

The Modifier to be applied to this BottomAppBar

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the BottomAppBar. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this BottomAppBar to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this BottomAppBar.

cutoutShape: Shape? = null

the shape of the cutout that will be added to the BottomAppBar - this should typically be the same shape used inside the FloatingActionButton, when BottomAppBar and FloatingActionButton are being used together in Scaffold. This shape will be drawn with an offset around all sides. If null, where will be no cutout.

elevation: Dp = AppBarDefaults.BottomAppBarElevation

the elevation of this BottomAppBar.

contentPadding: PaddingValues = AppBarDefaults.ContentPadding

the padding applied to the content of this BottomAppBar

content: @Composable RowScope.() -> Unit

the content of this BottomAppBar. The default layout here is a Row, so content inside will be placed horizontally.

BottomDrawer

@Composable
fun BottomDrawer(
    drawerContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier = Modifier,
    drawerState: BottomDrawerState = rememberBottomDrawerState(Closed),
    gesturesEnabled: Boolean = true,
    drawerShape: Shape = MaterialTheme.shapes.large,
    drawerElevation: Dp = DrawerDefaults.Elevation,
    drawerBackgroundColor: Color = MaterialTheme.colors.surface,
    drawerContentColor: Color = contentColorFor(drawerBackgroundColor),
    scrimColor: Color = DrawerDefaults.scrimColor,
    content: @Composable () -> Unit
): Unit

Material Design bottom navigation drawer.

Bottom navigation drawers are modal drawers that are anchored to the bottom of the screen instead of the left or right edge. They are only used with bottom app bars.

Bottom drawer image

See ModalDrawer for a layout that introduces a classic from-the-side drawer.

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.selection.toggleable
import androidx.compose.material.BottomDrawer
import androidx.compose.material.Button
import androidx.compose.material.Checkbox
import androidx.compose.material.Icon
import androidx.compose.material.ListItem
import androidx.compose.material.Text
import androidx.compose.material.rememberBottomDrawerState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val (gesturesEnabled, toggleGesturesEnabled) = remember { mutableStateOf(true) }
val scope = rememberCoroutineScope()
Column {
    Row(
        modifier = Modifier.fillMaxWidth().toggleable(
            value = gesturesEnabled,
            onValueChange = toggleGesturesEnabled
        )
    ) {
        Checkbox(gesturesEnabled, null)
        Text(text = if (gesturesEnabled) "Gestures Enabled" else "Gestures Disabled")
    }
    val drawerState = rememberBottomDrawerState(BottomDrawerValue.Closed)
    BottomDrawer(
        gesturesEnabled = gesturesEnabled,
        drawerState = drawerState,
        drawerContent = {
            Button(
                modifier = Modifier.align(Alignment.CenterHorizontally).padding(top = 16.dp),
                onClick = { scope.launch { drawerState.close() } },
                content = { Text("Close Drawer") }
            )
            LazyColumn {
                items(25) {
                    ListItem(
                        text = { Text("Item $it") },
                        icon = {
                            Icon(
                                Icons.Default.Favorite,
                                contentDescription = "Localized description"
                            )
                        }
                    )
                }
            }
        },
        content = {
            Column(
                modifier = Modifier.fillMaxSize().padding(16.dp),
                horizontalAlignment = Alignment.CenterHorizontally
            ) {
                val openText = if (gesturesEnabled) "▲▲▲ Pull up ▲▲▲" else "Click the button!"
                Text(text = if (drawerState.isClosed) openText else "▼▼▼ Drag down ▼▼▼")
                Spacer(Modifier.height(20.dp))
                Button(onClick = { scope.launch { drawerState.open() } }) {
                    Text("Click to open")
                }
            }
        }
    )
}
Parameters
drawerContent: @Composable ColumnScope.() -> Unit

composable that represents content inside the drawer

modifier: Modifier = Modifier

optional Modifier for the entire component

drawerState: BottomDrawerState = rememberBottomDrawerState(Closed)

state of the drawer

gesturesEnabled: Boolean = true

whether or not drawer can be interacted by gestures

drawerShape: Shape = MaterialTheme.shapes.large

shape of the drawer sheet

drawerElevation: Dp = DrawerDefaults.Elevation

drawer sheet elevation. This controls the size of the shadow below the drawer sheet

drawerBackgroundColor: Color = MaterialTheme.colors.surface

background color to be used for the drawer sheet

drawerContentColor: Color = contentColorFor(drawerBackgroundColor)

color of the content to use inside the drawer sheet. Defaults to either the matching content color for drawerBackgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

scrimColor: Color = DrawerDefaults.scrimColor

color of the scrim that obscures content when the drawer is open. If the color passed is Color.Unspecified, then a scrim will no longer be applied and the bottom drawer will not block interaction with the rest of the screen when visible.

content: @Composable () -> Unit

content of the rest of the UI

BottomNavigation

@Composable
fun BottomNavigation(
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = BottomNavigationDefaults.Elevation,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design bottom navigation.

Bottom navigation bars allow movement between primary destinations in an app.

Bottom navigation image

BottomNavigation should contain multiple BottomNavigationItems, each representing a singular destination.

A simple example looks like:

import androidx.compose.material.BottomNavigation
import androidx.compose.material.BottomNavigationItem
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var selectedItem by remember { mutableStateOf(0) }
val items = listOf("Songs", "Artists", "Playlists")

BottomNavigation(windowInsets = BottomNavigationDefaults.windowInsets) {
    items.forEachIndexed { index, item ->
        BottomNavigationItem(
            icon = { Icon(Icons.Filled.Favorite, contentDescription = null) },
            label = { Text(item) },
            selected = selectedItem == index,
            onClick = { selectedItem = index }
        )
    }
}

See BottomNavigationItem for configuration specific to each item, and not the overall BottomNavigation component.

For more information, see Bottom Navigation

Parameters
modifier: Modifier = Modifier

optional Modifier for this BottomNavigation

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for this BottomNavigation

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this BottomNavigation to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this BottomNavigation.

elevation: Dp = BottomNavigationDefaults.Elevation

elevation for this BottomNavigation

content: @Composable RowScope.() -> Unit

destinations inside this BottomNavigation, this should contain multiple BottomNavigationItems

BottomNavigation

@Composable
fun BottomNavigation(
    windowInsets: WindowInsets,
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = BottomNavigationDefaults.Elevation,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design bottom navigation.

Bottom navigation bars allow movement between primary destinations in an app.

Bottom navigation image

This particular overload provides ability to specify WindowInsets. Recommended value can be found in BottomNavigationDefaults.windowInsets.

BottomNavigation should contain multiple BottomNavigationItems, each representing a singular destination.

A simple example looks like:

import androidx.compose.material.BottomNavigation
import androidx.compose.material.BottomNavigationItem
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var selectedItem by remember { mutableStateOf(0) }
val items = listOf("Songs", "Artists", "Playlists")

BottomNavigation(windowInsets = BottomNavigationDefaults.windowInsets) {
    items.forEachIndexed { index, item ->
        BottomNavigationItem(
            icon = { Icon(Icons.Filled.Favorite, contentDescription = null) },
            label = { Text(item) },
            selected = selectedItem == index,
            onClick = { selectedItem = index }
        )
    }
}

See BottomNavigationItem for configuration specific to each item, and not the overall BottomNavigation component.

For more information, see Bottom Navigation

Parameters
windowInsets: WindowInsets

a window insets that bottom navigation will respect.

modifier: Modifier = Modifier

optional Modifier for this BottomNavigation

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for this BottomNavigation

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this BottomNavigation to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this BottomNavigation.

elevation: Dp = BottomNavigationDefaults.Elevation

elevation for this BottomNavigation

content: @Composable RowScope.() -> Unit

destinations inside this BottomNavigation, this should contain multiple BottomNavigationItems

BottomSheetScaffold

@Composable
fun BottomSheetScaffold(
    sheetContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier = Modifier,
    scaffoldState: BottomSheetScaffoldState = rememberBottomSheetScaffoldState(),
    topBar: (@Composable () -> Unit)? = null,
    snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) },
    floatingActionButton: (@Composable () -> Unit)? = null,
    floatingActionButtonPosition: FabPosition = FabPosition.End,
    sheetGesturesEnabled: Boolean = true,
    sheetShape: Shape = MaterialTheme.shapes.large,
    sheetElevation: Dp = BottomSheetScaffoldDefaults.SheetElevation,
    sheetBackgroundColor: Color = MaterialTheme.colors.surface,
    sheetContentColor: Color = contentColorFor(sheetBackgroundColor),
    sheetPeekHeight: Dp = BottomSheetScaffoldDefaults.SheetPeekHeight,
    backgroundColor: Color = MaterialTheme.colors.background,
    contentColor: Color = contentColorFor(backgroundColor),
    content: @Composable (PaddingValues) -> Unit
): Unit

Material Design standard bottom sheet.

Standard bottom sheets co-exist with the screen’s main UI region and allow for simultaneously viewing and interacting with both regions. They are commonly used to keep a feature or secondary content visible on screen when content in main UI region is frequently scrolled or panned.

Standard bottom sheet image

This component provides an API to put together several material components to construct your screen. For a similar component which implements the basic material design layout strategy with app bars, floating action buttons and navigation drawers, use the standard Scaffold. For similar component that uses a backdrop as the centerpiece of the screen, use BackdropScaffold.

A simple example of a bottom sheet scaffold looks like this:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material.BottomSheetScaffold
import androidx.compose.material.Button
import androidx.compose.material.FloatingActionButton
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.rememberBottomSheetScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scope = rememberCoroutineScope()
val scaffoldState = rememberBottomSheetScaffoldState()
BottomSheetScaffold(
    sheetContent = {
        Box(
            Modifier
                .fillMaxWidth()
                .height(128.dp),
            contentAlignment = Alignment.Center
        ) {
            Text("Swipe up to expand sheet")
        }
        Column(
            Modifier
                .fillMaxWidth()
                .padding(64.dp),
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            Text("Sheet content")
            Spacer(Modifier.height(20.dp))
            Button(
                onClick = {
                    scope.launch { scaffoldState.bottomSheetState.collapse() }
                }
            ) {
                Text("Click to collapse sheet")
            }
        }
    },
    scaffoldState = scaffoldState,
    topBar = {
        TopAppBar {
            Text("Bottom sheet scaffold")
        }
    },
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        FloatingActionButton(
            onClick = {
                // show snackbar as a suspend function
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar #${++clickCount}")
                }
            }
        ) {
            Icon(Icons.Default.Favorite, contentDescription = "Localized description")
        }
    },
    floatingActionButtonPosition = FabPosition.End,
    sheetPeekHeight = 128.dp
) { innerPadding ->
    LazyColumn(contentPadding = innerPadding) {
        items(100) {
            Box(
                Modifier
                    .fillMaxWidth()
                    .height(50.dp)
                    .background(colors[it % colors.size])
            )
        }
    }
}
Parameters
sheetContent: @Composable ColumnScope.() -> Unit

The content of the bottom sheet.

modifier: Modifier = Modifier

An optional Modifier for the root of the scaffold.

scaffoldState: BottomSheetScaffoldState = rememberBottomSheetScaffoldState()

The state of the scaffold.

topBar: (@Composable () -> Unit)? = null

An optional top app bar.

snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) }

The composable hosting the snackbars shown inside the scaffold.

floatingActionButton: (@Composable () -> Unit)? = null

An optional floating action button.

floatingActionButtonPosition: FabPosition = FabPosition.End

The position of the floating action button.

sheetGesturesEnabled: Boolean = true

Whether the bottom sheet can be interacted with by gestures.

sheetShape: Shape = MaterialTheme.shapes.large

The shape of the bottom sheet.

sheetElevation: Dp = BottomSheetScaffoldDefaults.SheetElevation

The elevation of the bottom sheet.

sheetBackgroundColor: Color = MaterialTheme.colors.surface

The background color of the bottom sheet.

sheetContentColor: Color = contentColorFor(sheetBackgroundColor)

The preferred content color provided by the bottom sheet to its children. Defaults to the matching content color for sheetBackgroundColor, or if that is not a color from the theme, this will keep the same content color set above the bottom sheet.

sheetPeekHeight: Dp = BottomSheetScaffoldDefaults.SheetPeekHeight

The height of the bottom sheet when it is collapsed. If the peek height equals the sheet's full height, the sheet will only have a collapsed state.

backgroundColor: Color = MaterialTheme.colors.background

The background color of the scaffold body.

contentColor: Color = contentColorFor(backgroundColor)

The color of the content in scaffold body. Defaults to either the matching content color for backgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

content: @Composable (PaddingValues) -> Unit

The main content of the screen. You should use the provided PaddingValues to properly offset the content, so that it is not obstructed by the bottom sheet when collapsed.

Button

@Composable
fun Button(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    elevation: ButtonElevation? = ButtonDefaults.elevation(),
    shape: Shape = MaterialTheme.shapes.small,
    border: BorderStroke? = null,
    colors: ButtonColors = ButtonDefaults.buttonColors(),
    contentPadding: PaddingValues = ButtonDefaults.ContentPadding,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design contained button.

Contained buttons are high-emphasis, distinguished by their use of elevation and fill. They contain actions that are primary to your app.

Contained button image

The default text style for internal Text components will be set to Typography.button.

import androidx.compose.material.Button
import androidx.compose.material.Text

Button(onClick = { /* Do something! */ }) {
    Text("Button")
}

If you need to add an icon just put it inside the content slot together with a spacing and a text:

import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.size
import androidx.compose.material.Button
import androidx.compose.material.Icon
import androidx.compose.material.Text

Button(onClick = { /* Do something! */ }) {
    Icon(
        Icons.Filled.Favorite,
        contentDescription = null,
        modifier = Modifier.size(ButtonDefaults.IconSize)
    )
    Spacer(Modifier.size(ButtonDefaults.IconSpacing))
    Text("Like")
}
Parameters
onClick: () -> Unit

Will be called when the user clicks the button

modifier: Modifier = Modifier

Modifier to be applied to the button

enabled: Boolean = true

Controls the enabled state of the button. When false, this button will not be clickable

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this button. You can use this to change the button's appearance or preview the button in different states. Note that if null is provided, interactions will still happen internally.

elevation: ButtonElevation? = ButtonDefaults.elevation()

ButtonElevation used to resolve the elevation for this button in different states. This controls the size of the shadow below the button. Pass null here to disable elevation for this button. See ButtonDefaults.elevation.

shape: Shape = MaterialTheme.shapes.small

Defines the button's shape as well as its shadow

border: BorderStroke? = null

Border to draw around the button

colors: ButtonColors = ButtonDefaults.buttonColors()

ButtonColors that will be used to resolve the background and content color for this button in different states. See ButtonDefaults.buttonColors.

contentPadding: PaddingValues = ButtonDefaults.ContentPadding

The spacing values to apply internally between the container and the content

@Composable
@NonRestartableComposable
fun Card(
    modifier: Modifier = Modifier,
    shape: Shape = MaterialTheme.shapes.medium,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    border: BorderStroke? = null,
    elevation: Dp = 1.dp,
    content: @Composable () -> Unit
): Unit

Material Design card.

Cards contain content and actions about a single subject.

Cards image

This version of Card will block clicks behind it. For clickable card, please use another overload that accepts onClick as a parameter.

import androidx.compose.material.Card
import androidx.compose.material.Text

Card {
    Text("Card Content")
}
Parameters
modifier: Modifier = Modifier

Modifier to be applied to the layout of the card.

shape: Shape = MaterialTheme.shapes.medium

Defines the card's shape as well its shadow. A shadow is only displayed if the elevation is greater than zero.

backgroundColor: Color = MaterialTheme.colors.surface

The background color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this card to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this card.

border: BorderStroke? = null

Optional border to draw on top of the card

elevation: Dp = 1.dp

The z-coordinate at which to place this card. This controls the size of the shadow below the card.

@ExperimentalMaterialApi
@Composable
@NonRestartableComposable
fun Card(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    shape: Shape = MaterialTheme.shapes.medium,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    border: BorderStroke? = null,
    elevation: Dp = 1.dp,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit
): Unit

Cards are Surfaces that display content and actions on a single topic.

This version of Card provides click handling as well. If you do not want Card to handle clicks, consider using another overload.

import androidx.compose.material.Card
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var count by remember { mutableStateOf(0) }
Card(onClick = { count++ }) {
    Text("Clickable card content with count: $count")
}
Parameters
onClick: () -> Unit

callback to be called when the card is clicked

modifier: Modifier = Modifier

Modifier to be applied to the layout of the card.

enabled: Boolean = true

Controls the enabled state of the card. When false, this card will not be clickable

shape: Shape = MaterialTheme.shapes.medium

Defines the card's shape as well its shadow. A shadow is only displayed if the elevation is greater than zero.

backgroundColor: Color = MaterialTheme.colors.surface

The background color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this card to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this card.

border: BorderStroke? = null

Optional border to draw on top of the card

elevation: Dp = 1.dp

The z-coordinate at which to place this card. This controls the size of the shadow below the card.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this card. You can use this to change the card's appearance or preview the card in different states. Note that if null is provided, interactions will still happen internally.

Checkbox

@Composable
fun Checkbox(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    colors: CheckboxColors = CheckboxDefaults.colors()
): Unit

Material Design checkbox.

Checkboxes allow users to select one or more items from a set. Checkboxes can turn an option on or off.

Checkboxes image

import androidx.compose.material.Checkbox
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val checkedState = remember { mutableStateOf(true) }
Checkbox(
    checked = checkedState.value,
    onCheckedChange = { checkedState.value = it }
)
Parameters
checked: Boolean

whether Checkbox is checked or unchecked

onCheckedChange: ((Boolean) -> Unit)?

callback to be invoked when checkbox is being clicked, therefore the change of checked state in requested. If null, then this is passive and relies entirely on a higher-level component to control the "checked" state.

modifier: Modifier = Modifier

Modifier to be applied to the layout of the checkbox

enabled: Boolean = true

whether the component is enabled or grayed out

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this checkbox. You can use this to change the checkbox's appearance or preview the checkbox in different states. Note that if null is provided, interactions will still happen internally.

colors: CheckboxColors = CheckboxDefaults.colors()

CheckboxColors that will be used to determine the color of the checkmark / box / border in different states. See CheckboxDefaults.colors.

See also
TriStateCheckbox

if you require support for an indeterminate state, or more advanced color customization between states.

@ExperimentalMaterialApi
@Composable
fun Chip(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = MaterialTheme.shapes.small.copy(CornerSize(percent = 50)),
    border: BorderStroke? = null,
    colors: ChipColors = ChipDefaults.chipColors(),
    leadingIcon: (@Composable () -> Unit)? = null,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design implementation of an action Chip.

Action chips offer actions related to primary content. They should appear dynamically and contextually in a UI.

import androidx.compose.material.Chip
import androidx.compose.material.Text

Chip(onClick = { /* Do something! */ }) {
    Text("Action Chip")
}

You can create an outlined action chip using ChipDefaults.outlinedChipColors and ChipDefaults.outlinedBorder

import androidx.compose.material.Chip
import androidx.compose.material.Icon
import androidx.compose.material.Text

Chip(
    onClick = { /* Do something! */ },
    border = ChipDefaults.outlinedBorder,
    colors = ChipDefaults.outlinedChipColors(),
    leadingIcon = {
        Icon(
            Icons.Filled.Settings,
            contentDescription = "Localized description"
        )
    }
) {
    Text("Change settings")
}

Action chips should appear in a set and can be horizontally scrollable

import androidx.compose.foundation.horizontalScroll
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.rememberScrollState
import androidx.compose.material.Chip
import androidx.compose.material.Text

Column(horizontalAlignment = Alignment.CenterHorizontally) {
    Row(modifier = Modifier.horizontalScroll(rememberScrollState())) {
        repeat(9) { index ->
            Chip(
                modifier = Modifier.padding(horizontal = 4.dp),
                onClick = { /* do something*/ }) {
                Text("Chip $index")
            }
        }
    }
}

Alternatively, use androidx.compose.foundation.layout.FlowRow to wrap chips to a new line.

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.FlowRow
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentHeight
import androidx.compose.material.Chip
import androidx.compose.material.Text

Column {
    FlowRow(
        Modifier
            .fillMaxWidth(1f)
            .wrapContentHeight(align = Alignment.Top),
        horizontalArrangement = Arrangement.Start,
    ) {
        repeat(10) { index ->
            Chip(
                modifier = Modifier
                    .padding(horizontal = 4.dp)
                    .align(alignment = Alignment.CenterVertically),
                onClick = { /* do something*/ }) {
                Text("Chip $index")
            }
        }
    }
}
Parameters
onClick: () -> Unit

called when the chip is clicked.

modifier: Modifier = Modifier

Modifier to be applied to the chip

enabled: Boolean = true

When disabled, chip will not respond to user input. It will also appear visually disabled and disabled to accessibility services.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this chip. You can use this to change the chip's appearance or preview the chip in different states. Note that if null is provided, interactions will still happen internally.

border: BorderStroke? = null

Border to draw around the chip. Pass null here for no border.

colors: ChipColors = ChipDefaults.chipColors()

ChipColors that will be used to resolve the background and content color for this chip in different states. See ChipDefaults.chipColors.

leadingIcon: (@Composable () -> Unit)? = null

Optional icon at the start of the chip, preceding the content text.

content: @Composable RowScope.() -> Unit

the content of this chip

CircularProgressIndicator

@Composable
fun CircularProgressIndicator(
    modifier: Modifier = Modifier,
    color: Color = MaterialTheme.colors.primary,
    strokeWidth: Dp = ProgressIndicatorDefaults.StrokeWidth,
    backgroundColor: Color = Color.Transparent,
    strokeCap: StrokeCap = StrokeCap.Square
): Unit

Indeterminate Material Design circular progress indicator.

Progress indicators express an unspecified wait time or display the length of a process.

Circular progress indicator image

Parameters
modifier: Modifier = Modifier

the Modifier to be applied to this progress indicator

color: Color = MaterialTheme.colors.primary

The color of the progress indicator.

strokeWidth: Dp = ProgressIndicatorDefaults.StrokeWidth

The stroke width for the progress indicator.

backgroundColor: Color = Color.Transparent

The color of the background behind the indicator, visible when the progress has not reached that area of the overall indicator yet.

strokeCap: StrokeCap = StrokeCap.Square

stroke cap to use for the ends of this progress indicator

CircularProgressIndicator

@Composable
fun CircularProgressIndicator(
    progress: @FloatRange(from = 0.0, to = 1.0) Float,
    modifier: Modifier = Modifier,
    color: Color = MaterialTheme.colors.primary,
    strokeWidth: Dp = ProgressIndicatorDefaults.StrokeWidth,
    backgroundColor: Color = Color.Transparent,
    strokeCap: StrokeCap = StrokeCap.Butt
): Unit

Determinate Material Design circular progress indicator.

Progress indicators express an unspecified wait time or display the length of a process.

Circular progress indicator image

By default there is no animation between progress values. You can use ProgressIndicatorDefaults.ProgressAnimationSpec as the default recommended AnimationSpec when animating progress, such as in the following example:

import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.requiredHeight
import androidx.compose.material.CircularProgressIndicator
import androidx.compose.material.OutlinedButton
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var progress by remember { mutableStateOf(0.1f) }
val animatedProgress by animateFloatAsState(
    targetValue = progress,
    animationSpec = ProgressIndicatorDefaults.ProgressAnimationSpec
)

Column(horizontalAlignment = Alignment.CenterHorizontally) {
    CircularProgressIndicator(progress = animatedProgress)
    Spacer(Modifier.requiredHeight(30.dp))
    OutlinedButton(
        onClick = {
            if (progress < 1f) progress += 0.1f
        }
    ) {
        Text("Increase")
    }
}
Parameters
progress: @FloatRange(from = 0.0, to = 1.0) Float

The progress of this progress indicator, where 0.0 represents no progress and 1.0 represents full progress. Values outside of this range are coerced into the range.

modifier: Modifier = Modifier

the Modifier to be applied to this progress indicator

color: Color = MaterialTheme.colors.primary

The color of the progress indicator.

strokeWidth: Dp = ProgressIndicatorDefaults.StrokeWidth

The stroke width for the progress indicator.

backgroundColor: Color = Color.Transparent

The color of the background behind the indicator, visible when the progress has not reached that area of the overall indicator yet.

strokeCap: StrokeCap = StrokeCap.Butt

stroke cap to use for the ends of this progress indicator

CursorDropdownMenu

@Composable
fun CursorDropdownMenu(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    focusable: Boolean = true,
    modifier: Modifier = Modifier,
    scrollState: ScrollState = rememberScrollState(),
    content: @Composable ColumnScope.() -> Unit
): Unit

A CursorDropdownMenu behaves similarly to Popup and will use the current position of the mouse cursor to position itself on screen.

The content of a CursorDropdownMenu will typically be DropdownMenuItems, as well as custom content. Using DropdownMenuItems will result in a menu that matches the Material specification for menus.

Parameters
expanded: Boolean

Whether the menu is currently open and visible to the user

onDismissRequest: () -> Unit

Called when the user requests to dismiss the menu, such as by tapping outside the menu's bounds

focusable: Boolean = true

Whether the dropdown can capture focus

modifier: Modifier = Modifier

Modifier to be applied to the menu's content

scrollState: ScrollState = rememberScrollState()

a ScrollState to used by the menu's content for items vertical scrolling

content: @Composable ColumnScope.() -> Unit

the content of this dropdown menu, typically a DropdownMenuItem

@Composable
fun Divider(
    modifier: Modifier = Modifier,
    color: Color = MaterialTheme.colors.onSurface.copy(alpha = DividerAlpha),
    thickness: Dp = 1.dp,
    startIndent: Dp = 0.dp
): Unit

Material Design divider.

A divider is a thin line that groups content in lists and layouts.

Dividers image

Parameters
color: Color = MaterialTheme.colors.onSurface.copy(alpha = DividerAlpha)

color of the divider line

thickness: Dp = 1.dp

thickness of the divider line, 1 dp is used by default. Using Dp.Hairline will produce a single pixel divider regardless of screen density.

startIndent: Dp = 0.dp

start offset of this line, no offset by default

@Composable
fun DropdownMenu(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    focusable: Boolean = true,
    modifier: Modifier = Modifier,
    offset: DpOffset = DpOffset(0.dp, 0.dp),
    scrollState: ScrollState = rememberScrollState(),
    content: @Composable ColumnScope.() -> Unit
): Unit

A Material Design dropdown menu.

A DropdownMenu behaves similarly to a Popup, and will use the position of the parent layout to position itself on screen. Commonly a DropdownMenu will be placed in a Box with a sibling that will be used as the 'anchor'. Note that a DropdownMenu by itself will not take up any space in a layout, as the menu is displayed in a separate window, on top of other content.

The content of a DropdownMenu will typically be DropdownMenuItems, as well as custom content. Using DropdownMenuItems will result in a menu that matches the Material specification for menus. Also note that the content is placed inside a scrollable Column, so using a LazyColumn as the root layout inside content is unsupported.

onDismissRequest will be called when the menu should close - for example when there is a tap outside the menu, or when the back key is pressed.

DropdownMenu changes its positioning depending on the available space, always trying to be fully visible. It will try to expand horizontally, depending on layout direction, to the end of its parent, then to the start of its parent, and then screen end-aligned. Vertically, it will try to expand to the bottom of its parent, then from the top of its parent, and then screen top-aligned. An offset can be provided to adjust the positioning of the menu for cases when the layout bounds of its parent do not coincide with its visual bounds. Note the offset will be applied in the direction in which the menu will decide to expand.

Example usage:

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.Divider
import androidx.compose.material.DropdownMenu
import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var expanded by remember { mutableStateOf(false) }

Box(modifier = Modifier
    .fillMaxSize()
    .wrapContentSize(Alignment.TopStart)) {
    IconButton(onClick = { expanded = true }) {
        Icon(Icons.Default.MoreVert, contentDescription = "Localized description")
    }
    DropdownMenu(
        expanded = expanded,
        onDismissRequest = { expanded = false }
    ) {
        DropdownMenuItem(onClick = { /* Handle refresh! */ }) {
            Text("Refresh")
        }
        DropdownMenuItem(onClick = { /* Handle settings! */ }) {
            Text("Settings")
        }
        Divider()
        DropdownMenuItem(onClick = { /* Handle send feedback! */ }) {
            Text("Send Feedback")
        }
    }
}

Example usage with a ScrollState to control the menu items scroll position:

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.foundation.rememberScrollState
import androidx.compose.material.DropdownMenu
import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var expanded by remember { mutableStateOf(false) }
val scrollState = rememberScrollState()
Box(
    modifier = Modifier
        .fillMaxSize()
        .wrapContentSize(Alignment.TopStart)
) {
    IconButton(onClick = { expanded = true }) {
        Icon(Icons.Default.MoreVert, contentDescription = "Localized description")
    }
    DropdownMenu(
        expanded = expanded,
        onDismissRequest = { expanded = false },
        scrollState = scrollState
    ) {
        repeat(30) {
            DropdownMenuItem(onClick = { /* Handle item! */ }) {
                Text("Item ${it + 1}")
            }
        }
    }
    LaunchedEffect(expanded) {
        if (expanded) {
            // Scroll to show the bottom menu items.
            scrollState.scrollTo(scrollState.maxValue)
        }
    }
}
Parameters
expanded: Boolean

Whether the menu is currently open and visible to the user

onDismissRequest: () -> Unit

Called when the user requests to dismiss the menu, such as by tapping outside the menu's bounds

focusable: Boolean = true

Whether the dropdown can capture focus

modifier: Modifier = Modifier

Modifier to be applied to the menu's content

offset: DpOffset = DpOffset(0.dp, 0.dp)

DpOffset to be added to the position of the menu

scrollState: ScrollState = rememberScrollState()

a ScrollState to used by the menu's content for items vertical scrolling

content: @Composable ColumnScope.() -> Unit

the content of this dropdown menu, typically a DropdownMenuItem

@Composable
fun DropdownMenu(
    expanded: Boolean,
    onDismissRequest: () -> Unit,
    modifier: Modifier = Modifier,
    offset: DpOffset = DpOffset(0.dp, 0.dp),
    scrollState: ScrollState = rememberScrollState(),
    properties: PopupProperties = PopupProperties(focusable = true),
    content: @Composable ColumnScope.() -> Unit
): Unit

Material Design dropdown menu.

A dropdown menu is a compact way of displaying multiple choices. It appears upon interaction with an element (such as an icon or button) or when users perform a specific action.

Menus image

A DropdownMenu behaves similarly to a Popup, and will use the position of the parent layout to position itself on screen. Commonly a DropdownMenu will be placed in a Box with a sibling that will be used as the 'anchor'. Note that a DropdownMenu by itself will not take up any space in a layout, as the menu is displayed in a separate window, on top of other content.

The content of a DropdownMenu will typically be DropdownMenuItems, as well as custom content. Using DropdownMenuItems will result in a menu that matches the Material specification for menus. Also note that the content is placed inside a scrollable Column, so using a LazyColumn as the root layout inside content is unsupported.

onDismissRequest will be called when the menu should close - for example when there is a tap outside the menu, or when the back key is pressed.

DropdownMenu changes its positioning depending on the available space, always trying to be fully visible. Depending on layout direction, first it will try to align its start to the start of its parent, then its end to the end of its parent, and then to the edge of the window. Vertically, it will try to align its top to the bottom of its parent, then its bottom to top of its parent, and then to the edge of the window.

An offset can be provided to adjust the positioning of the menu for cases when the layout bounds of its parent do not coincide with its visual bounds.

Example usage:

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.Divider
import androidx.compose.material.DropdownMenu
import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var expanded by remember { mutableStateOf(false) }

Box(modifier = Modifier
    .fillMaxSize()
    .wrapContentSize(Alignment.TopStart)) {
    IconButton(onClick = { expanded = true }) {
        Icon(Icons.Default.MoreVert, contentDescription = "Localized description")
    }
    DropdownMenu(
        expanded = expanded,
        onDismissRequest = { expanded = false }
    ) {
        DropdownMenuItem(onClick = { /* Handle refresh! */ }) {
            Text("Refresh")
        }
        DropdownMenuItem(onClick = { /* Handle settings! */ }) {
            Text("Settings")
        }
        Divider()
        DropdownMenuItem(onClick = { /* Handle send feedback! */ }) {
            Text("Send Feedback")
        }
    }
}

Example usage with a ScrollState to control the menu items scroll position:

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.foundation.rememberScrollState
import androidx.compose.material.DropdownMenu
import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.runtime.LaunchedEffect
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var expanded by remember { mutableStateOf(false) }
val scrollState = rememberScrollState()
Box(
    modifier = Modifier
        .fillMaxSize()
        .wrapContentSize(Alignment.TopStart)
) {
    IconButton(onClick = { expanded = true }) {
        Icon(Icons.Default.MoreVert, contentDescription = "Localized description")
    }
    DropdownMenu(
        expanded = expanded,
        onDismissRequest = { expanded = false },
        scrollState = scrollState
    ) {
        repeat(30) {
            DropdownMenuItem(onClick = { /* Handle item! */ }) {
                Text("Item ${it + 1}")
            }
        }
    }
    LaunchedEffect(expanded) {
        if (expanded) {
            // Scroll to show the bottom menu items.
            scrollState.scrollTo(scrollState.maxValue)
        }
    }
}
Parameters
expanded: Boolean

whether the menu is expanded or not

onDismissRequest: () -> Unit

called when the user requests to dismiss the menu, such as by tapping outside the menu's bounds

modifier: Modifier = Modifier

Modifier to be applied to the menu's content

offset: DpOffset = DpOffset(0.dp, 0.dp)

DpOffset from the original position of the menu. The offset respects the LayoutDirection, so the offset's x position will be added in LTR and subtracted in RTL.

scrollState: ScrollState = rememberScrollState()

a ScrollState to used by the menu's content for items vertical scrolling

properties: PopupProperties = PopupProperties(focusable = true)

PopupProperties for further customization of this popup's behavior

content: @Composable ColumnScope.() -> Unit

the content of this dropdown menu, typically a DropdownMenuItem

@Composable
fun DropdownMenuItem(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    contentPadding: PaddingValues = MenuDefaults.DropdownMenuItemContentPadding,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design dropdown menu item.

Example usage:

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.Divider
import androidx.compose.material.DropdownMenu
import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var expanded by remember { mutableStateOf(false) }

Box(modifier = Modifier
    .fillMaxSize()
    .wrapContentSize(Alignment.TopStart)) {
    IconButton(onClick = { expanded = true }) {
        Icon(Icons.Default.MoreVert, contentDescription = "Localized description")
    }
    DropdownMenu(
        expanded = expanded,
        onDismissRequest = { expanded = false }
    ) {
        DropdownMenuItem(onClick = { /* Handle refresh! */ }) {
            Text("Refresh")
        }
        DropdownMenuItem(onClick = { /* Handle settings! */ }) {
            Text("Settings")
        }
        Divider()
        DropdownMenuItem(onClick = { /* Handle send feedback! */ }) {
            Text("Send Feedback")
        }
    }
}
Parameters
onClick: () -> Unit

Called when the menu item was clicked

modifier: Modifier = Modifier

The modifier to be applied to the menu item

enabled: Boolean = true

Controls the enabled state of the menu item - when false, the menu item will not be clickable and onClick will not be invoked

contentPadding: PaddingValues = MenuDefaults.DropdownMenuItemContentPadding

the padding applied to the content of this menu item

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this menu item. You can use this to change the menu item's appearance or preview the menu item in different states. Note that if null is provided, interactions will still happen internally.

@Composable
fun DropdownMenuItem(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    contentPadding: PaddingValues = MenuDefaults.DropdownMenuItemContentPadding,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable RowScope.() -> Unit
): Unit

A dropdown menu item, as defined by the Material Design spec.

Example usage:

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.Divider
import androidx.compose.material.DropdownMenu
import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var expanded by remember { mutableStateOf(false) }

Box(modifier = Modifier
    .fillMaxSize()
    .wrapContentSize(Alignment.TopStart)) {
    IconButton(onClick = { expanded = true }) {
        Icon(Icons.Default.MoreVert, contentDescription = "Localized description")
    }
    DropdownMenu(
        expanded = expanded,
        onDismissRequest = { expanded = false }
    ) {
        DropdownMenuItem(onClick = { /* Handle refresh! */ }) {
            Text("Refresh")
        }
        DropdownMenuItem(onClick = { /* Handle settings! */ }) {
            Text("Settings")
        }
        Divider()
        DropdownMenuItem(onClick = { /* Handle send feedback! */ }) {
            Text("Send Feedback")
        }
    }
}
Parameters
onClick: () -> Unit

Called when the menu item was clicked

modifier: Modifier = Modifier

The modifier to be applied to the menu item

enabled: Boolean = true

Controls the enabled state of the menu item - when false, the menu item will not be clickable and onClick will not be invoked

contentPadding: PaddingValues = MenuDefaults.DropdownMenuItemContentPadding

the padding applied to the content of this menu item

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this menu item. You can use this to change the menu item's appearance or preview the menu item in different states. Note that if null is provided, interactions will still happen internally.

ExposedDropdownMenuBox

@ExperimentalMaterialApi
@Composable
fun ExposedDropdownMenuBox(
    expanded: Boolean,
    onExpandedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    content: @Composable ExposedDropdownMenuBoxScope.() -> Unit
): Unit

Material Design Exposed Dropdown Menu.

Box for Exposed Dropdown Menu. Expected to contain TextField and ExposedDropdownMenuBoxScope.ExposedDropdownMenu as a content.

An example of read-only Exposed Dropdown Menu:

import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.ExposedDropdownMenuBox
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val options = listOf("Option 1", "Option 2", "Option 3", "Option 4", "Option 5")
var expanded by remember { mutableStateOf(false) }
var selectedOptionText by remember { mutableStateOf(options[0]) }
// We want to react on tap/press on TextField to show menu
ExposedDropdownMenuBox(
    expanded = expanded,
    onExpandedChange = { expanded = it },
) {
    TextField(
        readOnly = true,
        value = selectedOptionText,
        onValueChange = { },
        label = { Text("Label") },
        trailingIcon = {
            ExposedDropdownMenuDefaults.TrailingIcon(
                expanded = expanded
            )
        },
        colors = ExposedDropdownMenuDefaults.textFieldColors()
    )
    ExposedDropdownMenu(
        expanded = expanded,
        onDismissRequest = {
            expanded = false
        }
    ) {
        options.forEach { selectionOption ->
            DropdownMenuItem(
                onClick = {
                    selectedOptionText = selectionOption
                    expanded = false
                }
            ) {
                Text(text = selectionOption)
            }
        }
    }
}

An example of editable Exposed Dropdown Menu:

import androidx.compose.material.DropdownMenuItem
import androidx.compose.material.ExposedDropdownMenuBox
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val options = listOf("Option 1", "Option 2", "Option 3", "Option 4", "Option 5")
var expanded by remember { mutableStateOf(false) }
var selectedOptionText by remember { mutableStateOf("") }
ExposedDropdownMenuBox(
    expanded = expanded,
    onExpandedChange = { expanded = it },
) {
    TextField(
        value = selectedOptionText,
        onValueChange = { selectedOptionText = it },
        label = { Text("Label") },
        trailingIcon = {
            ExposedDropdownMenuDefaults.TrailingIcon(
                expanded = expanded
            )
        },
        colors = ExposedDropdownMenuDefaults.textFieldColors()
    )
    // filter options based on text field value
    val filteringOptions =
        options.filter { it.contains(selectedOptionText, ignoreCase = true) }
    if (filteringOptions.isNotEmpty()) {
        ExposedDropdownMenu(
            expanded = expanded,
            onDismissRequest = {
                expanded = false
            }
        ) {
            filteringOptions.forEach { selectionOption ->
                DropdownMenuItem(
                    onClick = {
                        selectedOptionText = selectionOption
                        expanded = false
                    }
                ) {
                    Text(text = selectionOption)
                }
            }
        }
    }
}
Parameters
expanded: Boolean

Whether Dropdown Menu should be expanded or not.

onExpandedChange: (Boolean) -> Unit

Executes when the user clicks on the ExposedDropdownMenuBox.

modifier: Modifier = Modifier

The modifier to apply to this layout

content: @Composable ExposedDropdownMenuBoxScope.() -> Unit

The content to be displayed inside ExposedDropdownMenuBox.

ExtendedFloatingActionButton

@Composable
fun ExtendedFloatingActionButton(
    text: @Composable () -> Unit,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    icon: (@Composable () -> Unit)? = null,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = MaterialTheme.shapes.small.copy(CornerSize(percent = 50)),
    backgroundColor: Color = MaterialTheme.colors.secondary,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation()
): Unit

Material Design extended floating action button.

The extended FAB is wider than a regular FAB, and it includes a text label.

Extended floating action button image

This extended FAB contains text and an optional icon that will be placed at the start. See FloatingActionButton for a FAB that just contains some content, typically an icon.

import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Icon
import androidx.compose.material.Text

ExtendedFloatingActionButton(
    icon = { Icon(Icons.Filled.Favorite, contentDescription = null) },
    text = { Text("ADD TO BASKET") },
    onClick = { /*do something*/ }
)

If you want FAB’s container to have a fluid width (to be defined by its relationship to something else on screen, such as screen width or the layout grid) just apply an appropriate modifier. For example to fill the whole available width you can do:

import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Icon
import androidx.compose.material.Text

ExtendedFloatingActionButton(
    icon = { Icon(Icons.Filled.Favorite, contentDescription = null) },
    text = { Text("FLUID FAB") },
    onClick = { /*do something*/ },
    modifier = Modifier.fillMaxWidth()
)
Parameters
text: @Composable () -> Unit

Text label displayed inside this FAB

onClick: () -> Unit

callback invoked when this FAB is clicked

modifier: Modifier = Modifier

Modifier to be applied to this FAB

icon: (@Composable () -> Unit)? = null

Optional icon for this FAB, typically this will be a Icon.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this FAB. You can use this to change the FAB's appearance or preview the FAB in different states. Note that if null is provided, interactions will still happen internally.

shape: Shape = MaterialTheme.shapes.small.copy(CornerSize(percent = 50))

The Shape of this FAB

backgroundColor: Color = MaterialTheme.colors.secondary

The background color. Use Color.Transparent to have no color

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color. Will be used by text and iconography

elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation()

FloatingActionButtonElevation used to resolve the elevation for this FAB in different states. This controls the size of the shadow below the FAB.

FilterChip

@ExperimentalMaterialApi
@Composable
fun FilterChip(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = MaterialTheme.shapes.small.copy(CornerSize(percent = 50)),
    border: BorderStroke? = null,
    colors: SelectableChipColors = ChipDefaults.filterChipColors(),
    leadingIcon: (@Composable () -> Unit)? = null,
    selectedIcon: (@Composable () -> Unit)? = null,
    trailingIcon: (@Composable () -> Unit)? = null,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design filter chip.

Filter chips use tags or descriptive words to filter a collection. They are a good alternative to toggle buttons or checkboxes.

import androidx.compose.foundation.layout.requiredSize
import androidx.compose.material.FilterChip
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val state = remember { mutableStateOf(false) }
FilterChip(
    selected = state.value,
    onClick = { state.value = !state.value },
    selectedIcon = {
        Icon(
            imageVector = Icons.Filled.Done,
            contentDescription = "Localized Description",
            modifier = Modifier.requiredSize(ChipDefaults.SelectedIconSize)
        )
    }) {
    Text("Filter chip")
}

A filter chip with leading icon and selected icon looks like:

import androidx.compose.foundation.layout.requiredSize
import androidx.compose.material.FilterChip
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val state = remember { mutableStateOf(false) }
FilterChip(
    selected = state.value,
    onClick = { state.value = !state.value },
    leadingIcon = {
        Icon(
            imageVector = Icons.Filled.Home,
            contentDescription = "Localized description",
            modifier = Modifier.requiredSize(ChipDefaults.LeadingIconSize)
        )
    },
    selectedIcon = {
        Icon(
            imageVector = Icons.Filled.Done,
            contentDescription = "Localized Description",
            modifier = Modifier.requiredSize(ChipDefaults.SelectedIconSize)
        )
    }
) {
    Text("Filter chip")
}

You can create an outlined filter chip using ChipDefaults.outlinedFilterChipColors and ChipDefaults.outlinedBorder

import androidx.compose.foundation.layout.requiredSize
import androidx.compose.material.FilterChip
import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val state = remember { mutableStateOf(false) }
FilterChip(
    selected = state.value,
    onClick = { state.value = !state.value },
    border = ChipDefaults.outlinedBorder,
    colors = ChipDefaults.outlinedFilterChipColors(),
    selectedIcon = {
        Icon(
            imageVector = Icons.Filled.Done,
            contentDescription = "Localized Description",
            modifier = Modifier.requiredSize(ChipDefaults.SelectedIconSize)
        )
    }) {
    Text("Filter chip")
}
Parameters
selected: Boolean

boolean state for this chip: either it is selected or not

onClick: () -> Unit

will be called when the user clicks the chip

modifier: Modifier = Modifier

Modifier to be applied to the chip

enabled: Boolean = true

controls the enabled state of the chip. When false, this chip will not be clickable

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this chip. You can use this to change the chip's appearance or preview the chip in different states. Note that if null is provided, interactions will still happen internally.

shape: Shape = MaterialTheme.shapes.small.copy(CornerSize(percent = 50))

defines the chip's shape as well as its shadow

border: BorderStroke? = null

border to draw around the chip

colors: SelectableChipColors = ChipDefaults.filterChipColors()

SelectableChipColors that will be used to resolve the background and content color for this chip in different states. See ChipDefaults.filterChipColors.

leadingIcon: (@Composable () -> Unit)? = null

Optional icon at the start of the chip, preceding the content text.

selectedIcon: (@Composable () -> Unit)? = null

Icon used to indicate a chip's selected state, it is commonly a Icons.Filled.Done. By default, if a leading icon is also provided, the leading icon will be obscured by a circle overlay and then the selected icon.

trailingIcon: (@Composable () -> Unit)? = null

Optional icon at the end of the chip, following the content text. Filter chips commonly do not display any trailing icon.

content: @Composable RowScope.() -> Unit

the content of this chip

FloatingActionButton

@Composable
fun FloatingActionButton(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = MaterialTheme.shapes.small.copy(CornerSize(percent = 50)),
    backgroundColor: Color = MaterialTheme.colors.secondary,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation(),
    content: @Composable () -> Unit
): Unit

Material Design floating action button.

A floating action button (FAB) represents the primary action of a screen.

Floating action button image

This FAB is typically used with an Icon:

import androidx.compose.material.FloatingActionButton
import androidx.compose.material.Icon

FloatingActionButton(onClick = { /*do something*/ }) {
    Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
}

See ExtendedFloatingActionButton for an extended FAB that contains text and an optional icon.

Parameters
onClick: () -> Unit

callback invoked when this FAB is clicked

modifier: Modifier = Modifier

Modifier to be applied to this FAB.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this FAB. You can use this to change the FAB's appearance or preview the FAB in different states. Note that if null is provided, interactions will still happen internally.

shape: Shape = MaterialTheme.shapes.small.copy(CornerSize(percent = 50))

The Shape of this FAB

backgroundColor: Color = MaterialTheme.colors.secondary

The background color. Use Color.Transparent to have no color

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color for content inside this FAB

elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation()

FloatingActionButtonElevation used to resolve the elevation for this FAB in different states. This controls the size of the shadow below the FAB.

content: @Composable () -> Unit

the content of this FAB - this is typically an Icon.

@Composable
@NonRestartableComposable
fun Icon(
    bitmap: ImageBitmap,
    contentDescription: String?,
    modifier: Modifier = Modifier,
    tint: Color = LocalContentColor.current.copy(alpha = LocalContentAlpha.current)
): Unit

A Material Design icon component that draws bitmap using tint, with a default value of LocalContentColor. If bitmap has no intrinsic size, this component will use the recommended default size. Icon is an opinionated component designed to be used with single-color icons so that they can be tinted correctly for the component they are placed in. For multicolored icons and icons that should not be tinted, use Color.Unspecified for tint. For generic images that should not be tinted, and do not follow the recommended icon size, use the generic androidx.compose.foundation.Image instead. For a clickable icon, see IconButton.

Parameters
bitmap: ImageBitmap

ImageBitmap to draw inside this Icon

contentDescription: String?

text used by accessibility services to describe what this icon represents. This should always be provided unless this icon is used for decorative purposes, and does not represent a meaningful action that a user can take. This text should be localized, such as by using androidx.compose.ui.res.stringResource or similar

modifier: Modifier = Modifier

optional Modifier for this Icon

tint: Color = LocalContentColor.current.copy(alpha = LocalContentAlpha.current)

tint to be applied to bitmap. If Color.Unspecified is provided, then no tint is applied

@Composable
@NonRestartableComposable
fun Icon(
    imageVector: ImageVector,
    contentDescription: String?,
    modifier: Modifier = Modifier,
    tint: Color = LocalContentColor.current.copy(alpha = LocalContentAlpha.current)
): Unit

A Material Design icon component that draws imageVector using tint, with a default value of LocalContentColor. If imageVector has no intrinsic size, this component will use the recommended default size. Icon is an opinionated component designed to be used with single-color icons so that they can be tinted correctly for the component they are placed in. For multicolored icons and icons that should not be tinted, use Color.Unspecified for tint. For generic images that should not be tinted, and do not follow the recommended icon size, use the generic androidx.compose.foundation.Image instead. For a clickable icon, see IconButton.

Parameters
imageVector: ImageVector

ImageVector to draw inside this Icon

contentDescription: String?

text used by accessibility services to describe what this icon represents. This should always be provided unless this icon is used for decorative purposes, and does not represent a meaningful action that a user can take. This text should be localized, such as by using androidx.compose.ui.res.stringResource or similar

modifier: Modifier = Modifier

optional Modifier for this Icon

tint: Color = LocalContentColor.current.copy(alpha = LocalContentAlpha.current)

tint to be applied to imageVector. If Color.Unspecified is provided, then no tint is applied

@Composable
fun Icon(
    painter: Painter,
    contentDescription: String?,
    modifier: Modifier = Modifier,
    tint: Color = LocalContentColor.current.copy(alpha = LocalContentAlpha.current)
): Unit

A Material Design icon component that draws painter using tint, with a default value of LocalContentColor. If painter has no intrinsic size, this component will use the recommended default size. Icon is an opinionated component designed to be used with single-color icons so that they can be tinted correctly for the component they are placed in. For multicolored icons and icons that should not be tinted, use Color.Unspecified for tint. For generic images that should not be tinted, and do not follow the recommended icon size, use the generic androidx.compose.foundation.Image instead. For a clickable icon, see IconButton.

Parameters
painter: Painter

Painter to draw inside this Icon

contentDescription: String?

text used by accessibility services to describe what this icon represents. This should always be provided unless this icon is used for decorative purposes, and does not represent a meaningful action that a user can take. This text should be localized, such as by using androidx.compose.ui.res.stringResource or similar

modifier: Modifier = Modifier

optional Modifier for this Icon

tint: Color = LocalContentColor.current.copy(alpha = LocalContentAlpha.current)

tint to be applied to painter. If Color.Unspecified is provided, then no tint is applied

IconButton

@Composable
fun IconButton(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit
): Unit

IconButton is a clickable icon, used to represent actions. An IconButton has an overall minimum touch target size of 48 x 48dp, to meet accessibility guidelines. content is centered inside the IconButton.

This component is typically used inside an App Bar for the navigation icon / actions. See App Bar documentation for samples of this.

content should typically be an Icon, using an icon from androidx.compose.material.icons.Icons. If using a custom icon, note that the typical size for the internal icon is 24 x 24 dp.

import androidx.compose.material.Icon
import androidx.compose.material.IconButton

IconButton(onClick = { /* doSomething() */ }) {
    Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
}
Parameters
onClick: () -> Unit

the lambda to be invoked when this icon is pressed

modifier: Modifier = Modifier

optional Modifier for this IconButton

enabled: Boolean = true

whether or not this IconButton will handle input events and appear enabled for semantics purposes

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this IconButton. You can use this to change the IconButton's appearance or preview the IconButton in different states. Note that if null is provided, interactions will still happen internally.

content: @Composable () -> Unit

the content (icon) to be drawn inside the IconButton. This is typically an Icon.

IconToggleButton

@Composable
fun IconToggleButton(
    checked: Boolean,
    onCheckedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit
): Unit

An IconButton with two states, for icons that can be toggled 'on' and 'off', such as a bookmark icon, or a navigation icon that opens a drawer.

import androidx.compose.animation.animateColorAsState
import androidx.compose.material.Icon
import androidx.compose.material.IconToggleButton
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.graphics.Color

var checked by remember { mutableStateOf(false) }

IconToggleButton(checked = checked, onCheckedChange = { checked = it }) {
    val tint by animateColorAsState(if (checked) Color(0xFFEC407A) else Color(0xFFB0BEC5))
    Icon(Icons.Filled.Favorite, contentDescription = "Localized description", tint = tint)
}
Parameters
checked: Boolean

whether this IconToggleButton is currently checked

onCheckedChange: (Boolean) -> Unit

callback to be invoked when this icon is selected

modifier: Modifier = Modifier

optional Modifier for this IconToggleButton

enabled: Boolean = true

enabled whether or not this IconToggleButton will handle input events and appear enabled for semantics purposes

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this IconButton. You can use this to change the IconButton's appearance or preview the IconButton in different states. Note that if null is provided, interactions will still happen internally.

content: @Composable () -> Unit

the content (icon) to be drawn inside the IconToggleButton. This is typically an Icon.

LeadingIconTab

@Composable
fun LeadingIconTab(
    selected: Boolean,
    onClick: () -> Unit,
    text: @Composable () -> Unit,
    icon: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    selectedContentColor: Color = LocalContentColor.current,
    unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium)
): Unit

Material Design tab.

Tabs organize content across different screens, data sets, and other interactions.

Tab image

A LeadingIconTab represents a single page of content using a text label and an icon in front of the label. It represents its selected state by tinting the text label and icon with selectedContentColor.

This should typically be used inside of a TabRow, see the corresponding documentation for example usage.

Parameters
selected: Boolean

whether this tab is selected or not

onClick: () -> Unit

the callback to be invoked when this tab is selected

text: @Composable () -> Unit

the text label displayed in this tab

icon: @Composable () -> Unit

the icon displayed in this tab

modifier: Modifier = Modifier

optional Modifier for this tab

enabled: Boolean = true

controls the enabled state of this tab. When false, this tab will not be clickable and will appear disabled to accessibility services.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this tab. You can use this to change the tab's appearance or preview the tab in different states. Note that if null is provided, interactions will still happen internally.

selectedContentColor: Color = LocalContentColor.current

the color for the content of this tab when selected, and the color of the ripple.

unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium)

the color for the content of this tab when not selected

See also
Tab

LinearProgressIndicator

@Composable
fun LinearProgressIndicator(
    modifier: Modifier = Modifier,
    color: Color = MaterialTheme.colors.primary,
    backgroundColor: Color = color.copy(alpha = IndicatorBackgroundOpacity),
    strokeCap: StrokeCap = StrokeCap.Butt
): Unit

Indeterminate Material Design linear progress indicator.

Progress indicators express an unspecified wait time or display the length of a process.

Linear progress indicator image

Parameters
modifier: Modifier = Modifier

the Modifier to be applied to this progress indicator

color: Color = MaterialTheme.colors.primary

The color of the progress indicator.

backgroundColor: Color = color.copy(alpha = IndicatorBackgroundOpacity)

The color of the background behind the indicator, visible when the progress has not reached that area of the overall indicator yet.

strokeCap: StrokeCap = StrokeCap.Butt

stroke cap to use for the ends of this progress indicator

LinearProgressIndicator

@Composable
fun LinearProgressIndicator(
    progress: @FloatRange(from = 0.0, to = 1.0) Float,
    modifier: Modifier = Modifier,
    color: Color = MaterialTheme.colors.primary,
    backgroundColor: Color = color.copy(alpha = IndicatorBackgroundOpacity),
    strokeCap: StrokeCap = StrokeCap.Butt
): Unit

Determinate Material Design linear progress indicator.

Progress indicators express an unspecified wait time or display the length of a process.

Linear progress indicator image

By default there is no animation between progress values. You can use ProgressIndicatorDefaults.ProgressAnimationSpec as the default recommended AnimationSpec when animating progress, such as in the following example:

import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.requiredHeight
import androidx.compose.material.LinearProgressIndicator
import androidx.compose.material.OutlinedButton
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var progress by remember { mutableStateOf(0.1f) }
val animatedProgress by animateFloatAsState(
    targetValue = progress,
    animationSpec = ProgressIndicatorDefaults.ProgressAnimationSpec
)

Column(horizontalAlignment = Alignment.CenterHorizontally) {
    LinearProgressIndicator(progress = animatedProgress)
    Spacer(Modifier.requiredHeight(30.dp))
    OutlinedButton(
        onClick = {
            if (progress < 1f) progress += 0.1f
        }
    ) {
        Text("Increase")
    }
}
Parameters
progress: @FloatRange(from = 0.0, to = 1.0) Float

The progress of this progress indicator, where 0.0 represents no progress and 1.0 represents full progress. Values outside of this range are coerced into the range.

modifier: Modifier = Modifier

the Modifier to be applied to this progress indicator

color: Color = MaterialTheme.colors.primary

The color of the progress indicator.

backgroundColor: Color = color.copy(alpha = IndicatorBackgroundOpacity)

The color of the background behind the indicator, visible when the progress has not reached that area of the overall indicator yet.

strokeCap: StrokeCap = StrokeCap.Butt

stroke cap to use for the ends of this progress indicator

ListItem

@Composable
@ExperimentalMaterialApi
fun ListItem(
    modifier: Modifier = Modifier,
    icon: (@Composable () -> Unit)? = null,
    secondaryText: (@Composable () -> Unit)? = null,
    singleLineSecondaryText: Boolean = true,
    overlineText: (@Composable () -> Unit)? = null,
    trailing: (@Composable () -> Unit)? = null,
    text: @Composable () -> Unit
): Unit

Material Design list item.

Lists are continuous, vertical indexes of text or images.

Lists image

To make this ListItem clickable, use Modifier.clickable. To add a background to the ListItem, wrap it with a Surface.

This component can be used to achieve the list item templates existing in the spec. For example:

  • one-line items

import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.size
import androidx.compose.material.Divider
import androidx.compose.material.Icon
import androidx.compose.material.ListItem
import androidx.compose.material.Text

Column {
    ListItem(text = { Text("One line list item with no icon") })
    Divider()
    ListItem(
        text = { Text("One line list item with 24x24 icon") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("One line list item with 40x40 icon") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null,
                modifier = Modifier.size(40.dp)
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("One line list item with 56x56 icon") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null,
                modifier = Modifier.size(56.dp)
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("One line clickable list item") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null,
                modifier = Modifier.size(56.dp)
            )
        },
        modifier = Modifier.clickable { }
    )
    Divider()
    ListItem(
        text = { Text("One line list item with trailing icon") },
        trailing = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = "Localized Description"
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("One line list item") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null,
                modifier = Modifier.size(40.dp)
            )
        },
        trailing = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = "Localized description"
            )
        }
    )
    Divider()
}
  • two-line items

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.size
import androidx.compose.material.Divider
import androidx.compose.material.Icon
import androidx.compose.material.ListItem
import androidx.compose.material.Text

Column {
    ListItem(
        text = { Text("Two line list item") },
        secondaryText = { Text("Secondary text") }
    )
    Divider()
    ListItem(
        text = { Text("Two line list item") },
        overlineText = { Text("OVERLINE") }
    )
    Divider()
    ListItem(
        text = { Text("Two line list item with 24x24 icon") },
        secondaryText = { Text("Secondary text") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("Two line list item with 40x40 icon") },
        secondaryText = { Text("Secondary text") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null,
                modifier = Modifier.size(40.dp)
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("Two line list item with 40x40 icon") },
        secondaryText = { Text("Secondary text") },
        trailing = { Text("meta") },
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null,
                modifier = Modifier.size(40.dp)
            )
        }
    )
    Divider()
}
  • three-line items

import androidx.compose.foundation.layout.Column
import androidx.compose.material.Divider
import androidx.compose.material.Icon
import androidx.compose.material.ListItem
import androidx.compose.material.Text

Column {
    ListItem(
        text = { Text("Three line list item") },
        secondaryText = {
            Text(
                "This is a long secondary text for the current list item, " +
                    "displayed on two lines"
            )
        },
        singleLineSecondaryText = false,
        trailing = { Text("meta") }
    )
    Divider()
    ListItem(
        text = { Text("Three line list item") },
        overlineText = { Text("OVERLINE") },
        secondaryText = { Text("Secondary text") }
    )
    Divider()
    ListItem(
        text = { Text("Three line list item with 24x24 icon") },
        secondaryText = {
            Text(
                "This is a long secondary text for the current list item " +
                    "displayed on two lines"
            )
        },
        singleLineSecondaryText = false,
        icon = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = null
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("Three line list item with trailing icon") },
        secondaryText = {
            Text(
                "This is a long secondary text for the current list" +
                    " item, displayed on two lines"
            )
        },
        singleLineSecondaryText = false,
        trailing = {
            Icon(
                Icons.Filled.Favorite,
                contentDescription = "Localized description"
            )
        }
    )
    Divider()
    ListItem(
        text = { Text("Three line list item") },
        overlineText = { Text("OVERLINE") },
        secondaryText = { Text("Secondary text") },
        trailing = { Text("meta") }
    )
    Divider()
}

You can combine this component with a checkbox or switch as in the following examples:

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.selection.toggleable
import androidx.compose.material.Checkbox
import androidx.compose.material.Divider
import androidx.compose.material.ListItem
import androidx.compose.material.Switch
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

Column {
    var switched by remember { mutableStateOf(false) }
    val onSwitchedChange: (Boolean) -> Unit = { switched = it }
    ListItem(
        text = { Text("Switch ListItem") },
        trailing = {
            Switch(
                checked = switched,
                onCheckedChange = null // null recommended for accessibility with screenreaders
            )
        },
        modifier = Modifier.toggleable(
            role = Role.Switch,
            value = switched,
            onValueChange = onSwitchedChange
        )
    )
    Divider()
    var checked by remember { mutableStateOf(true) }
    val onCheckedChange: (Boolean) -> Unit = { checked = it }
    ListItem(
        text = { Text("Checkbox ListItem") },
        trailing = {
            Checkbox(
                checked = checked,
                onCheckedChange = null // null recommended for accessibility with screenreaders
            )
        },
        modifier = Modifier.toggleable(
            role = Role.Checkbox,
            value = checked,
            onValueChange = onCheckedChange
        )
    )
    Divider()
}
Parameters
modifier: Modifier = Modifier

Modifier to be applied to the list item

icon: (@Composable () -> Unit)? = null

The leading supporting visual of the list item

secondaryText: (@Composable () -> Unit)? = null

The secondary text of the list item

singleLineSecondaryText: Boolean = true

Whether the secondary text is single line

overlineText: (@Composable () -> Unit)? = null

The text displayed above the primary text

trailing: (@Composable () -> Unit)? = null

The trailing meta text, icon, switch or checkbox

text: @Composable () -> Unit

The primary text of the list item

MaterialTheme

@Composable
fun MaterialTheme(
    colors: Colors = MaterialTheme.colors,
    typography: Typography = MaterialTheme.typography,
    shapes: Shapes = MaterialTheme.shapes,
    content: @Composable () -> Unit
): Unit

Material Theming.

Material Theming refers to the customization of your Material Design app to better reflect your product’s brand.

Material components such as Button and Checkbox use values provided here when retrieving default values.

It defines colors as specified in the Material Color theme creation spec, typography defined in the Material Type Scale spec, and shapes defined in the Shape scheme.

All values may be set by providing this component with the colors, typography, and shapes attributes. Use this to configure the overall theme of elements within this MaterialTheme.

Any values that are not set will inherit the current value from the theme, falling back to the defaults if there is no parent MaterialTheme. This allows using a MaterialTheme at the top of your application, and then separate MaterialTheme(s) for different screens / parts of your UI, overriding only the parts of the theme definition that need to change.

import androidx.compose.foundation.isSystemInDarkTheme
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Text
import androidx.compose.material.Typography
import androidx.compose.material.darkColors
import androidx.compose.material.lightColors
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.text.TextStyle

val lightColors = lightColors(
    primary = Color(0xFF1EB980)
)

val darkColors = darkColors(
    primary = Color(0xFF66ffc7)
)

val colors = if (isSystemInDarkTheme()) darkColors else lightColors

val typography = Typography(
    h1 = TextStyle(
        fontWeight = FontWeight.W100,
        fontSize = 96.sp
    ),
    button = TextStyle(
        fontWeight = FontWeight.W600,
        fontSize = 14.sp
    )
)

MaterialTheme(colors = colors, typography = typography) {
    val currentTheme = if (MaterialTheme.colors.isLight) "light" else "dark"
    ExtendedFloatingActionButton(
        text = { Text("FAB with text style and color from $currentTheme theme") },
        onClick = {}
    )
}
Parameters
colors: Colors = MaterialTheme.colors

A complete definition of the Material Color theme for this hierarchy

typography: Typography = MaterialTheme.typography

A set of text styles to be used as this hierarchy's typography system

shapes: Shapes = MaterialTheme.shapes

A set of shapes to be used by the components in this hierarchy

ModalBottomSheetLayout

@Composable
fun ModalBottomSheetLayout(
    sheetContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier = Modifier,
    sheetState: ModalBottomSheetState = rememberModalBottomSheetState(Hidden),
    sheetGesturesEnabled: Boolean = true,
    sheetShape: Shape = MaterialTheme.shapes.large,
    sheetElevation: Dp = ModalBottomSheetDefaults.Elevation,
    sheetBackgroundColor: Color = MaterialTheme.colors.surface,
    sheetContentColor: Color = contentColorFor(sheetBackgroundColor),
    scrimColor: Color = ModalBottomSheetDefaults.scrimColor,
    content: @Composable () -> Unit
): Unit

Material Design modal bottom sheet.

Modal bottom sheets present a set of choices while blocking interaction with the rest of the screen. They are an alternative to inline menus and simple dialogs, providing additional room for content, iconography, and actions.

Modal bottom sheet image

A simple example of a modal bottom sheet looks like this:

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.selection.toggleable
import androidx.compose.material.Button
import androidx.compose.material.Checkbox
import androidx.compose.material.Icon
import androidx.compose.material.ListItem
import androidx.compose.material.ModalBottomSheetLayout
import androidx.compose.material.Text
import androidx.compose.material.rememberModalBottomSheetState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

var skipHalfExpanded by remember { mutableStateOf(false) }
val state = rememberModalBottomSheetState(
    initialValue = ModalBottomSheetValue.Hidden,
    skipHalfExpanded = skipHalfExpanded
)
val scope = rememberCoroutineScope()
ModalBottomSheetLayout(
    sheetState = state,
    sheetContent = {
        LazyColumn {
            items(50) {
                ListItem(
                    text = { Text("Item $it") },
                    icon = {
                        Icon(
                            Icons.Default.Favorite,
                            contentDescription = "Localized description"
                        )
                    }
                )
            }
        }
    }
) {
    Column(
        modifier = Modifier.fillMaxSize().padding(16.dp),
        horizontalAlignment = Alignment.CenterHorizontally
    ) {
        Row(
            Modifier.toggleable(
                value = skipHalfExpanded,
                role = Role.Checkbox,
                onValueChange = { checked -> skipHalfExpanded = checked }
            )
        ) {
            Checkbox(checked = skipHalfExpanded, onCheckedChange = null)
            Spacer(Modifier.width(16.dp))
            Text("Skip Half Expanded State")
        }
        Spacer(Modifier.height(20.dp))
        Button(onClick = { scope.launch { state.show() } }) {
            Text("Click to show sheet")
        }
    }
}
Parameters
sheetContent: @Composable ColumnScope.() -> Unit

The content of the bottom sheet.

modifier: Modifier = Modifier

Optional Modifier for the entire component.

sheetState: ModalBottomSheetState = rememberModalBottomSheetState(Hidden)

The state of the bottom sheet.

sheetGesturesEnabled: Boolean = true

Whether the bottom sheet can be interacted with by gestures.

sheetShape: Shape = MaterialTheme.shapes.large

The shape of the bottom sheet.

sheetElevation: Dp = ModalBottomSheetDefaults.Elevation

The elevation of the bottom sheet.

sheetBackgroundColor: Color = MaterialTheme.colors.surface

The background color of the bottom sheet.

sheetContentColor: Color = contentColorFor(sheetBackgroundColor)

The preferred content color provided by the bottom sheet to its children. Defaults to the matching content color for sheetBackgroundColor, or if that is not a color from the theme, this will keep the same content color set above the bottom sheet.

scrimColor: Color = ModalBottomSheetDefaults.scrimColor

The color of the scrim that is applied to the rest of the screen when the bottom sheet is visible. If the color passed is Color.Unspecified, then a scrim will no longer be applied and the bottom sheet will not block interaction with the rest of the screen when visible.

content: @Composable () -> Unit

The content of rest of the screen.

@Composable
fun ModalDrawer(
    drawerContent: @Composable ColumnScope.() -> Unit,
    modifier: Modifier = Modifier,
    drawerState: DrawerState = rememberDrawerState(DrawerValue.Closed),
    gesturesEnabled: Boolean = true,
    drawerShape: Shape = MaterialTheme.shapes.large,
    drawerElevation: Dp = DrawerDefaults.Elevation,
    drawerBackgroundColor: Color = MaterialTheme.colors.surface,
    drawerContentColor: Color = contentColorFor(drawerBackgroundColor),
    scrimColor: Color = DrawerDefaults.scrimColor,
    content: @Composable () -> Unit
): Unit

Material Design modal navigation drawer.

Modal navigation drawers block interaction with the rest of an app’s content with a scrim. They are elevated above most of the app’s UI and don’t affect the screen’s layout grid.

Modal drawer image

See BottomDrawer for a layout that introduces a bottom drawer, suitable when using bottom navigation.

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.material.Button
import androidx.compose.material.ModalDrawer
import androidx.compose.material.Text
import androidx.compose.material.rememberDrawerState
import androidx.compose.runtime.rememberCoroutineScope

val drawerState = rememberDrawerState(DrawerValue.Closed)
val scope = rememberCoroutineScope()
ModalDrawer(
    drawerState = drawerState,
    drawerContent = {
        Button(
            modifier = Modifier.align(Alignment.CenterHorizontally).padding(top = 16.dp),
            onClick = { scope.launch { drawerState.close() } },
            content = { Text("Close Drawer") }
        )
    },
    content = {
        Column(
            modifier = Modifier.fillMaxSize().padding(16.dp),
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            Text(text = if (drawerState.isClosed) ">>> Swipe >>>" else "<<< Swipe <<<")
            Spacer(Modifier.height(20.dp))
            Button(onClick = { scope.launch { drawerState.open() } }) {
                Text("Click to open")
            }
        }
    }
)
Parameters
drawerContent: @Composable ColumnScope.() -> Unit

composable that represents content inside the drawer

modifier: Modifier = Modifier

optional modifier for the drawer

drawerState: DrawerState = rememberDrawerState(DrawerValue.Closed)

state of the drawer

gesturesEnabled: Boolean = true

whether or not drawer can be interacted by gestures

drawerShape: Shape = MaterialTheme.shapes.large

shape of the drawer sheet

drawerElevation: Dp = DrawerDefaults.Elevation

drawer sheet elevation. This controls the size of the shadow below the drawer sheet

drawerBackgroundColor: Color = MaterialTheme.colors.surface

background color to be used for the drawer sheet

drawerContentColor: Color = contentColorFor(drawerBackgroundColor)

color of the content to use inside the drawer sheet. Defaults to either the matching content color for drawerBackgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

scrimColor: Color = DrawerDefaults.scrimColor

color of the scrim that obscures content when the drawer is open

content: @Composable () -> Unit

content of the rest of the UI

@Composable
fun NavigationRail(
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = NavigationRailDefaults.Elevation,
    header: (@Composable ColumnScope.() -> Unit)? = null,
    content: @Composable ColumnScope.() -> Unit
): Unit

Material Design navigation rail.

A Navigation Rail is a side navigation component that allows movement between primary destinations in an app. A navigation rail should be used to display three to seven app destinations and, optionally, a FloatingActionButton or a logo inside header. Each destination is typically represented by an icon and an optional text label.

Navigation rail image

NavigationRail should contain multiple NavigationRailItems, each representing a singular destination.

A simple example looks like:

import androidx.compose.material.Icon
import androidx.compose.material.NavigationRail
import androidx.compose.material.NavigationRailItem
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var selectedItem by remember { mutableStateOf(0) }
val items = listOf("Home", "Search", "Settings")
val icons = listOf(Icons.Filled.Home, Icons.Filled.Search, Icons.Filled.Settings)
NavigationRail(windowInsets = NavigationRailDefaults.windowInsets) {
    items.forEachIndexed { index, item ->
        NavigationRailItem(
            icon = { Icon(icons[index], contentDescription = item) },
            label = { Text(item) },
            selected = selectedItem == index,
            onClick = { selectedItem = index }
        )
    }
}

See NavigationRailItem for configuration specific to each item, and not the overall NavigationRail component.

For more information, see Navigation Rail

Parameters
modifier: Modifier = Modifier

optional Modifier for this NavigationRail

backgroundColor: Color = MaterialTheme.colors.surface

The background color for this NavigationRail

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this NavigationRail to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this NavigationRail.

elevation: Dp = NavigationRailDefaults.Elevation

elevation for this NavigationRail

header: (@Composable ColumnScope.() -> Unit)? = null

an optional header that may hold a FloatingActionButton or a logo

content: @Composable ColumnScope.() -> Unit

destinations inside this NavigationRail, this should contain multiple NavigationRailItems

@Composable
fun NavigationRail(
    windowInsets: WindowInsets,
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = NavigationRailDefaults.Elevation,
    header: (@Composable ColumnScope.() -> Unit)? = null,
    content: @Composable ColumnScope.() -> Unit
): Unit

Material Design navigation rail.

A Navigation Rail is a side navigation component that allows movement between primary destinations in an app. A navigation rail should be used to display three to seven app destinations and, optionally, a FloatingActionButton or a logo inside header. Each destination is typically represented by an icon and an optional text label.

Navigation rail image

This particular overload provides ability to specify WindowInsets. Recommended value can be found in NavigationRailDefaults.windowInsets.

NavigationRail should contain multiple NavigationRailItems, each representing a singular destination.

A simple example looks like:

import androidx.compose.material.Icon
import androidx.compose.material.NavigationRail
import androidx.compose.material.NavigationRailItem
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var selectedItem by remember { mutableStateOf(0) }
val items = listOf("Home", "Search", "Settings")
val icons = listOf(Icons.Filled.Home, Icons.Filled.Search, Icons.Filled.Settings)
NavigationRail(windowInsets = NavigationRailDefaults.windowInsets) {
    items.forEachIndexed { index, item ->
        NavigationRailItem(
            icon = { Icon(icons[index], contentDescription = item) },
            label = { Text(item) },
            selected = selectedItem == index,
            onClick = { selectedItem = index }
        )
    }
}

See NavigationRailItem for configuration specific to each item, and not the overall NavigationRail component.

For more information, see Navigation Rail

Parameters
windowInsets: WindowInsets

a window insets that navigation rail will respect

modifier: Modifier = Modifier

optional Modifier for this NavigationRail

backgroundColor: Color = MaterialTheme.colors.surface

The background color for this NavigationRail

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this NavigationRail to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this NavigationRail.

elevation: Dp = NavigationRailDefaults.Elevation

elevation for this NavigationRail

header: (@Composable ColumnScope.() -> Unit)? = null

an optional header that may hold a FloatingActionButton or a logo

content: @Composable ColumnScope.() -> Unit

destinations inside this NavigationRail, this should contain multiple NavigationRailItems

@Composable
fun NavigationRailItem(
    selected: Boolean,
    onClick: () -> Unit,
    icon: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    label: (@Composable () -> Unit)? = null,
    alwaysShowLabel: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    selectedContentColor: Color = MaterialTheme.colors.primary,
    unselectedContentColor: Color = LocalContentColor.current.copy(alpha = ContentAlpha.medium)
): Unit

Material Design navigation rail item.

A NavigationRailItem always shows text labels (if it exists) when selected. Showing text labels if not selected is controlled by alwaysShowLabel.

Parameters
selected: Boolean

whether this item is selected (active)

onClick: () -> Unit

the callback to be invoked when this item is selected

icon: @Composable () -> Unit

icon for this item, typically this will be an Icon

modifier: Modifier = Modifier

optional Modifier for this item

enabled: Boolean = true

controls the enabled state of this item. When false, this item will not be clickable and will appear disabled to accessibility services.

label: (@Composable () -> Unit)? = null

optional text label for this item

alwaysShowLabel: Boolean = true

whether to always show the label for this item. If false, the label will only be shown when this item is selected.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this item. You can use this to change the item's appearance or preview the item in different states. Note that if null is provided, interactions will still happen internally.

selectedContentColor: Color = MaterialTheme.colors.primary

the color of the text label and icon when this item is selected, and the color of the ripple.

unselectedContentColor: Color = LocalContentColor.current.copy(alpha = ContentAlpha.medium)

the color of the text label and icon when this item is not selected

OutlinedButton

@Composable
@NonRestartableComposable
fun OutlinedButton(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    elevation: ButtonElevation? = null,
    shape: Shape = MaterialTheme.shapes.small,
    border: BorderStroke? = ButtonDefaults.outlinedBorder,
    colors: ButtonColors = ButtonDefaults.outlinedButtonColors(),
    contentPadding: PaddingValues = ButtonDefaults.ContentPadding,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design outlined button.

Outlined buttons are medium-emphasis buttons. They contain actions that are important, but aren't the primary action in an app.

Outlined button image

The default text style for internal Text components will be set to Typography.button.

import androidx.compose.material.OutlinedButton
import androidx.compose.material.Text

OutlinedButton(onClick = { /* Do something! */ }) {
    Text("Outlined Button")
}
Parameters
onClick: () -> Unit

Will be called when the user clicks the button

modifier: Modifier = Modifier

Modifier to be applied to the button

enabled: Boolean = true

Controls the enabled state of the button. When false, this button will not be clickable

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this button. You can use this to change the button's appearance or preview the button in different states. Note that if null is provided, interactions will still happen internally.

elevation: ButtonElevation? = null

ButtonElevation used to resolve the elevation for this button in different states. An OutlinedButton typically has no elevation, see Button for a button with elevation.

shape: Shape = MaterialTheme.shapes.small

Defines the button's shape as well as its shadow

border: BorderStroke? = ButtonDefaults.outlinedBorder

Border to draw around the button

colors: ButtonColors = ButtonDefaults.outlinedButtonColors()

ButtonColors that will be used to resolve the background and content color for this button in different states. See ButtonDefaults.outlinedButtonColors.

contentPadding: PaddingValues = ButtonDefaults.ContentPadding

The spacing values to apply internally between the container and the content

OutlinedTextField

@Composable
fun OutlinedTextField(
    value: String,
    onValueChange: (String) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    readOnly: Boolean = false,
    textStyle: TextStyle = LocalTextStyle.current,
    label: (@Composable () -> Unit)? = null,
    placeholder: (@Composable () -> Unit)? = null,
    leadingIcon: (@Composable () -> Unit)? = null,
    trailingIcon: (@Composable () -> Unit)? = null,
    isError: Boolean = false,
    visualTransformation: VisualTransformation = VisualTransformation.None,
    keyboardOptions: KeyboardOptions = KeyboardOptions.Default,
    keyboardActions: KeyboardActions = KeyboardActions.Default,
    singleLine: Boolean = false,
    maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE,
    minLines: Int = 1,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = MaterialTheme.shapes.small,
    colors: TextFieldColors = TextFieldDefaults.outlinedTextFieldColors()
): Unit

Material Design outlined text field.

Outlined text fields have less visual emphasis than filled text fields. When they appear in places like forms, where many text fields are placed together, their reduced emphasis helps simplify the layout.

Outlined text field image

See example usage:

import androidx.compose.material.OutlinedTextField
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable

var text by rememberSaveable { mutableStateOf("") }

OutlinedTextField(
    value = text,
    onValueChange = { text = it },
    label = { Text("Label") }
)

If apart from input text change you also want to observe the cursor location, selection range, or IME composition use the OutlinedTextField overload with the TextFieldValue parameter instead.

Parameters
value: String

the input text to be shown in the text field

onValueChange: (String) -> Unit

the callback that is triggered when the input service updates the text. An updated text comes as a parameter of the callback

modifier: Modifier = Modifier

a Modifier for this text field

enabled: Boolean = true

controls the enabled state of the OutlinedTextField. When false, the text field will be neither editable nor focusable, the input of the text field will not be selectable, visually text field will appear in the disabled UI state

readOnly: Boolean = false

controls the editable state of the OutlinedTextField. When true, the text field can not be modified, however, a user can focus it and copy text from it. Read-only text fields are usually used to display pre-filled forms that user can not edit

textStyle: TextStyle = LocalTextStyle.current

the style to be applied to the input text. The default textStyle uses the LocalTextStyle defined by the theme

label: (@Composable () -> Unit)? = null

the optional label to be displayed inside the text field container. The default text style for internal Text is Typography.caption when the text field is in focus and Typography.subtitle1 when the text field is not in focus

placeholder: (@Composable () -> Unit)? = null

the optional placeholder to be displayed when the text field is in focus and the input text is empty. The default text style for internal Text is Typography.subtitle1

leadingIcon: (@Composable () -> Unit)? = null

the optional leading icon to be displayed at the beginning of the text field container

trailingIcon: (@Composable () -> Unit)? = null

the optional trailing icon to be displayed at the end of the text field container

isError: Boolean = false

indicates if the text field's current value is in error. If set to true, the label, bottom indicator and trailing icon by default will be displayed in error color

visualTransformation: VisualTransformation = VisualTransformation.None

transforms the visual representation of the input value For example, you can use PasswordVisualTransformation to create a password text field. By default no visual transformation is applied

keyboardOptions: KeyboardOptions = KeyboardOptions.Default

software keyboard options that contains configuration such as KeyboardType and ImeAction

keyboardActions: KeyboardActions = KeyboardActions.Default

when the input service emits an IME action, the corresponding callback is called. Note that this IME action may be different from what you specified in KeyboardOptions.imeAction

singleLine: Boolean = false

when set to true, this text field becomes a single horizontally scrolling text field instead of wrapping onto multiple lines. The keyboard will be informed to not show the return key as the ImeAction. Note that maxLines parameter will be ignored as the maxLines attribute will be automatically set to 1

maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE

the maximum height in terms of maximum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

minLines: Int = 1

the minimum height in terms of minimum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this text field. You can use this to change the text field's appearance or preview the text field in different states. Note that if null is provided, interactions will still happen internally.

shape: Shape = MaterialTheme.shapes.small

the shape of the text field's border

colors: TextFieldColors = TextFieldDefaults.outlinedTextFieldColors()

TextFieldColors that will be used to resolve color of the text and content (including label, placeholder, leading and trailing icons, border) for this text field in different states. See TextFieldDefaults.outlinedTextFieldColors

OutlinedTextField

@Composable
fun OutlinedTextField(
    value: TextFieldValue,
    onValueChange: (TextFieldValue) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    readOnly: Boolean = false,
    textStyle: TextStyle = LocalTextStyle.current,
    label: (@Composable () -> Unit)? = null,
    placeholder: (@Composable () -> Unit)? = null,
    leadingIcon: (@Composable () -> Unit)? = null,
    trailingIcon: (@Composable () -> Unit)? = null,
    isError: Boolean = false,
    visualTransformation: VisualTransformation = VisualTransformation.None,
    keyboardOptions: KeyboardOptions = KeyboardOptions.Default,
    keyboardActions: KeyboardActions = KeyboardActions(),
    singleLine: Boolean = false,
    maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE,
    minLines: Int = 1,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = TextFieldDefaults.OutlinedTextFieldShape,
    colors: TextFieldColors = TextFieldDefaults.outlinedTextFieldColors()
): Unit

Material Design outlined text field.

Outlined text fields have less visual emphasis than filled text fields. When they appear in places like forms, where many text fields are placed together, their reduced emphasis helps simplify the layout.

Outlined text field image

See example usage:

import androidx.compose.material.OutlinedTextField
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.ui.text.TextRange
import androidx.compose.ui.text.input.TextFieldValue

var text by rememberSaveable(stateSaver = TextFieldValue.Saver) {
    mutableStateOf(TextFieldValue("example", TextRange(0, 7)))
}

OutlinedTextField(
    value = text,
    onValueChange = { text = it },
    label = { Text("Label") }
)

This overload provides access to the input text, cursor position and selection range and IME composition. If you only want to observe an input text change, use the OutlinedTextField overload with the String parameter instead.

Parameters
value: TextFieldValue

the input TextFieldValue to be shown in the text field

onValueChange: (TextFieldValue) -> Unit

the callback that is triggered when the input service updates values in TextFieldValue. An updated TextFieldValue comes as a parameter of the callback

modifier: Modifier = Modifier

a Modifier for this text field

enabled: Boolean = true

controls the enabled state of the OutlinedTextField. When false, the text field will be neither editable nor focusable, the input of the text field will not be selectable, visually text field will appear in the disabled UI state

readOnly: Boolean = false

controls the editable state of the OutlinedTextField. When true, the text field can not be modified, however, a user can focus it and copy text from it. Read-only text fields are usually used to display pre-filled forms that user can not edit

textStyle: TextStyle = LocalTextStyle.current

the style to be applied to the input text. The default textStyle uses the LocalTextStyle defined by the theme

label: (@Composable () -> Unit)? = null

the optional label to be displayed inside the text field container. The default text style for internal Text is Typography.caption when the text field is in focus and Typography.subtitle1 when the text field is not in focus

placeholder: (@Composable () -> Unit)? = null

the optional placeholder to be displayed when the text field is in focus and the input text is empty. The default text style for internal Text is Typography.subtitle1

leadingIcon: (@Composable () -> Unit)? = null

the optional leading icon to be displayed at the beginning of the text field container

trailingIcon: (@Composable () -> Unit)? = null

the optional trailing icon to be displayed at the end of the text field container

isError: Boolean = false

indicates if the text field's current value is in error state. If set to true, the label, bottom indicator and trailing icon by default will be displayed in error color

visualTransformation: VisualTransformation = VisualTransformation.None

transforms the visual representation of the input value For example, you can use PasswordVisualTransformation to create a password text field. By default no visual transformation is applied

keyboardOptions: KeyboardOptions = KeyboardOptions.Default

software keyboard options that contains configuration such as KeyboardType and ImeAction

keyboardActions: KeyboardActions = KeyboardActions()

when the input service emits an IME action, the corresponding callback is called. Note that this IME action may be different from what you specified in KeyboardOptions.imeAction

singleLine: Boolean = false

when set to true, this text field becomes a single horizontally scrolling text field instead of wrapping onto multiple lines. The keyboard will be informed to not show the return key as the ImeAction. Note that maxLines parameter will be ignored as the maxLines attribute will be automatically set to 1

maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE

the maximum height in terms of maximum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

minLines: Int = 1

the minimum height in terms of minimum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this text field. You can use this to change the text field's appearance or preview the text field in different states. Note that if null is provided, interactions will still happen internally.

shape: Shape = TextFieldDefaults.OutlinedTextFieldShape

the shape of the text field's border

colors: TextFieldColors = TextFieldDefaults.outlinedTextFieldColors()

TextFieldColors that will be used to resolve color of the text and content (including label, placeholder, leading and trailing icons, border) for this text field in different states. See TextFieldDefaults.outlinedTextFieldColors

ProvideTextStyle

@Composable
fun ProvideTextStyle(value: TextStyle, content: @Composable () -> Unit): Unit

This function is used to set the current value of LocalTextStyle, merging the given style with the current style values for any missing attributes. Any Text components included in this component's content will be styled with this style unless styled explicitly.

See also
LocalTextStyle

RadioButton

@Composable
fun RadioButton(
    selected: Boolean,
    onClick: (() -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    colors: RadioButtonColors = RadioButtonDefaults.colors()
): Unit

Material Design radio button.

Radio buttons allow users to select one option from a set.

Radio buttons image

import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.selection.selectableGroup
import androidx.compose.material.RadioButton
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

// We have two radio buttons and only one can be selected
var state by remember { mutableStateOf(true) }
// Note that Modifier.selectableGroup() is essential to ensure correct accessibility behavior
Row(Modifier.selectableGroup()) {
    RadioButton(
        selected = state,
        onClick = { state = true }
    )
    RadioButton(
        selected = !state,
        onClick = { state = false }
    )
}

RadioButtons can be combined together with Text in the desired layout (e.g. Column or Row) to achieve radio group-like behaviour, where the entire layout is selectable:

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.selection.selectable
import androidx.compose.foundation.selection.selectableGroup
import androidx.compose.material.RadioButton
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val radioOptions = listOf("Calls", "Missed", "Friends")
val (selectedOption, onOptionSelected) = remember { mutableStateOf(radioOptions[0]) }
// Note that Modifier.selectableGroup() is essential to ensure correct accessibility behavior
Column(Modifier.selectableGroup()) {
    radioOptions.forEach { text ->
        Row(
            Modifier
                .fillMaxWidth()
                .height(56.dp)
                .selectable(
                    selected = (text == selectedOption),
                    onClick = { onOptionSelected(text) },
                    role = Role.RadioButton
                )
                .padding(horizontal = 16.dp),
            verticalAlignment = Alignment.CenterVertically
        ) {
            RadioButton(
                selected = (text == selectedOption),
                onClick = null // null recommended for accessibility with screenreaders
            )
            Text(
                text = text,
                style = MaterialTheme.typography.body1.merge(),
                modifier = Modifier.padding(start = 16.dp)
            )
        }
    }
}
Parameters
selected: Boolean

whether this radio button is selected or not

onClick: (() -> Unit)?

callback to be invoked when the RadioButton is clicked. If null, then this RadioButton will not handle input events, and only act as a visual indicator of selected state

modifier: Modifier = Modifier

Modifier to be applied to the radio button

enabled: Boolean = true

Controls the enabled state of the RadioButton. When false, this button will not be selectable and appears disabled

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this radio button. You can use this to change the radio button's appearance or preview the radio button in different states. Note that if null is provided, interactions will still happen internally.

colors: RadioButtonColors = RadioButtonDefaults.colors()

RadioButtonColors that will be used to resolve the color used for this RadioButton in different states. See RadioButtonDefaults.colors.

RangeSlider

@Composable
@ExperimentalMaterialApi
fun RangeSlider(
    value: ClosedFloatingPointRange<Float>,
    onValueChange: (ClosedFloatingPointRange<Float>) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    valueRange: ClosedFloatingPointRange<Float> = 0f..1f,
    steps: @IntRange(from = 0) Int = 0,
    onValueChangeFinished: (() -> Unit)? = null,
    colors: SliderColors = SliderDefaults.colors()
): Unit

Material Design slider.

Range Sliders expand upon Slider using the same concepts but allow the user to select 2 values.

The two values are still bounded by the value range but they also cannot cross each other.

Use continuous Range Sliders to allow users to make meaningful selections that don’t require a specific values:

import androidx.compose.material.RangeSlider
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var sliderPosition by remember { mutableStateOf(0f..100f) }
Text(text = sliderPosition.toString())
RangeSlider(
    value = sliderPosition,
    onValueChange = { sliderPosition = it },
    valueRange = 0f..100f,
    onValueChangeFinished = {
        // launch some business logic update with the state you hold
        // viewModel.updateSelectedSliderValue(sliderPosition)
    },
)

You can allow the user to choose only between predefined set of values by specifying the amount of steps between min and max values:

import androidx.compose.material.RangeSlider
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var sliderPosition by remember { mutableStateOf(0f..100f) }
Text(text = sliderPosition.toString())
RangeSlider(
    steps = 5,
    value = sliderPosition,
    onValueChange = { sliderPosition = it },
    valueRange = 0f..100f,
    onValueChangeFinished = {
        // launch some business logic update with the state you hold
        // viewModel.updateSelectedSliderValue(sliderPosition)
    },
    colors = SliderDefaults.colors(
        thumbColor = MaterialTheme.colors.secondary,
        activeTrackColor = MaterialTheme.colors.secondary
    )
)
Parameters
value: ClosedFloatingPointRange<Float>

current values of the RangeSlider. If either value is outside of valueRange provided, it will be coerced to this range.

onValueChange: (ClosedFloatingPointRange<Float>) -> Unit

lambda in which values should be updated

modifier: Modifier = Modifier

modifiers for the Range Slider layout

enabled: Boolean = true

whether or not component is enabled and can we interacted with or not

valueRange: ClosedFloatingPointRange<Float> = 0f..1f

range of values that Range Slider values can take. Passed value will be coerced to this range

steps: @IntRange(from = 0) Int = 0

if greater than 0, specifies the amounts of discrete values, evenly distributed between across the whole value range. If 0, range slider will behave as a continuous slider and allow to choose any values from the range specified. Must not be negative.

onValueChangeFinished: (() -> Unit)? = null

lambda to be invoked when value change has ended. This callback shouldn't be used to update the range slider values (use onValueChange for that), but rather to know when the user has completed selecting a new value by ending a drag or a click.

colors: SliderColors = SliderDefaults.colors()

SliderColors that will be used to determine the color of the Range Slider parts in different state. See SliderDefaults.colors to customize.

@Composable
fun Scaffold(
    modifier: Modifier = Modifier,
    scaffoldState: ScaffoldState = rememberScaffoldState(),
    topBar: @Composable () -> Unit = {},
    bottomBar: @Composable () -> Unit = {},
    snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) },
    floatingActionButton: @Composable () -> Unit = {},
    floatingActionButtonPosition: FabPosition = FabPosition.End,
    isFloatingActionButtonDocked: Boolean = false,
    drawerContent: (@Composable ColumnScope.() -> Unit)? = null,
    drawerGesturesEnabled: Boolean = true,
    drawerShape: Shape = MaterialTheme.shapes.large,
    drawerElevation: Dp = DrawerDefaults.Elevation,
    drawerBackgroundColor: Color = MaterialTheme.colors.surface,
    drawerContentColor: Color = contentColorFor(drawerBackgroundColor),
    drawerScrimColor: Color = DrawerDefaults.scrimColor,
    backgroundColor: Color = MaterialTheme.colors.background,
    contentColor: Color = contentColorFor(backgroundColor),
    content: @Composable (PaddingValues) -> Unit
): Unit

Material Design layout.

Scaffold implements the basic material design visual layout structure.

This component provides API to put together several material components to construct your screen, by ensuring proper layout strategy for them and collecting necessary data so these components will work together correctly.

For similar components that implement different layout structures, see BackdropScaffold, which uses a backdrop as the centerpiece of the screen, and BottomSheetScaffold, which uses a persistent bottom sheet as the centerpiece of the screen.

Simple example of a Scaffold with TopAppBar, FloatingActionButton and drawer:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    drawerContent = { Text("Drawer content") },
    topBar = {
        TopAppBar(
            title = { Text("Simple Scaffold Screen") },
            navigationIcon = {
                IconButton(
                    onClick = {
                        scope.launch { scaffoldState.drawerState.open() }
                    }
                ) {
                    Icon(Icons.Filled.Menu, contentDescription = "Localized description")
                }
            }
        )
    },
    floatingActionButtonPosition = FabPosition.End,
    floatingActionButton = {
        ExtendedFloatingActionButton(
            text = { Text("Inc") },
            onClick = { /* fab click handler */ }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        LazyColumn(contentPadding = innerPadding) {
            items(count = 100) {
                Box(
                    Modifier
                        .fillMaxWidth()
                        .height(50.dp)
                        .background(colors[it % colors.size])
                )
            }
        }
    }
)

More fancy usage with BottomAppBar with cutout and docked FloatingActionButton, which animates it's shape when clicked:

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.TweenSpec
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.shape.CutCornerShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.BottomAppBar
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()

// Consider negative values to mean 'cut corner' and positive values to mean 'round corner'
val sharpEdgePercent = -50f
val roundEdgePercent = 45f
// Start with sharp edges
val animatedProgress = remember { Animatable(sharpEdgePercent) }
// Create a coroutineScope for the animation
val coroutineScope = rememberCoroutineScope()
// animation value to animate shape
val progress = animatedProgress.value.roundToInt()

// When progress is 0, there is no modification to the edges so we are just drawing a rectangle.
// This allows for a smooth transition between cut corners and round corners.
val fabShape = if (progress < 0) {
    CutCornerShape(abs(progress))
} else if (progress == roundEdgePercent.toInt()) {
    CircleShape
} else {
    RoundedCornerShape(progress)
}
// lambda to call to trigger shape animation
val changeShape: () -> Unit = {
    val target = animatedProgress.targetValue
    val nextTarget = if (target == roundEdgePercent) sharpEdgePercent else roundEdgePercent
    coroutineScope.launch {
        animatedProgress.animateTo(
            targetValue = nextTarget,
            animationSpec = TweenSpec(durationMillis = 600)
        )
    }
}

Scaffold(
    scaffoldState = scaffoldState,
    drawerContent = { Text("Drawer content") },
    topBar = { TopAppBar(title = { Text("Scaffold with bottom cutout") }) },
    bottomBar = {
        BottomAppBar(cutoutShape = fabShape) {
            IconButton(
                onClick = {
                    coroutineScope.launch { scaffoldState.drawerState.open() }
                }
            ) {
                Icon(Icons.Filled.Menu, contentDescription = "Localized description")
            }
        }
    },
    floatingActionButton = {
        ExtendedFloatingActionButton(
            text = { Text("Change shape") },
            onClick = changeShape,
            shape = fabShape
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    floatingActionButtonPosition = FabPosition.Center,
    isFloatingActionButtonDocked = true,
    content = { innerPadding ->
        LazyColumn(contentPadding = innerPadding) {
            items(count = 100) {
                Box(
                    Modifier
                        .fillMaxWidth()
                        .height(50.dp)
                        .background(colors[it % colors.size])
                )
            }
        }
    }
)

To show a Snackbar, use SnackbarHostState.showSnackbar. Scaffold state already have ScaffoldState.snackbarHostState when created

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                // show snackbar as a suspend function
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Body content",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)
Parameters
modifier: Modifier = Modifier

optional Modifier for the root of the Scaffold

scaffoldState: ScaffoldState = rememberScaffoldState()

state of this scaffold widget. It contains the state of the screen, e.g. variables to provide manual control over the drawer behavior, sizes of components, etc

topBar: @Composable () -> Unit = {}

top app bar of the screen. Consider using TopAppBar.

bottomBar: @Composable () -> Unit = {}

bottom bar of the screen. Consider using BottomAppBar.

snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) }

component to host Snackbars that are pushed to be shown via SnackbarHostState.showSnackbar. Usually it's a SnackbarHost

floatingActionButton: @Composable () -> Unit = {}

Main action button of your screen. Consider using FloatingActionButton for this slot.

floatingActionButtonPosition: FabPosition = FabPosition.End

position of the FAB on the screen. See FabPosition for possible options available.

isFloatingActionButtonDocked: Boolean = false

whether floatingActionButton should overlap with bottomBar for half a height, if bottomBar exists. Ignored if there's no bottomBar or no floatingActionButton.

drawerContent: (@Composable ColumnScope.() -> Unit)? = null

content of the Drawer sheet that can be pulled from the left side (right for RTL).

drawerGesturesEnabled: Boolean = true

whether or not drawer (if set) can be interacted with via gestures

drawerShape: Shape = MaterialTheme.shapes.large

shape of the drawer sheet (if set)

drawerElevation: Dp = DrawerDefaults.Elevation

drawer sheet elevation. This controls the size of the shadow below the drawer sheet (if set)

drawerBackgroundColor: Color = MaterialTheme.colors.surface

background color to be used for the drawer sheet

drawerContentColor: Color = contentColorFor(drawerBackgroundColor)

color of the content to use inside the drawer sheet. Defaults to either the matching content color for drawerBackgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

drawerScrimColor: Color = DrawerDefaults.scrimColor

color of the scrim that obscures content when the drawer is open

backgroundColor: Color = MaterialTheme.colors.background

background of the scaffold body

contentColor: Color = contentColorFor(backgroundColor)

color of the content in scaffold body. Defaults to either the matching content color for backgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

content: @Composable (PaddingValues) -> Unit

content of your screen. The lambda receives an PaddingValues that should be applied to the content root via Modifier.padding to properly offset top and bottom bars. If you're using VerticalScroller, apply this modifier to the child of the scroller, and not on the scroller itself.

@Composable
fun Scaffold(
    contentWindowInsets: WindowInsets,
    modifier: Modifier = Modifier,
    scaffoldState: ScaffoldState = rememberScaffoldState(),
    topBar: @Composable () -> Unit = {},
    bottomBar: @Composable () -> Unit = {},
    snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) },
    floatingActionButton: @Composable () -> Unit = {},
    floatingActionButtonPosition: FabPosition = FabPosition.End,
    isFloatingActionButtonDocked: Boolean = false,
    drawerContent: (@Composable ColumnScope.() -> Unit)? = null,
    drawerGesturesEnabled: Boolean = true,
    drawerShape: Shape = MaterialTheme.shapes.large,
    drawerElevation: Dp = DrawerDefaults.Elevation,
    drawerBackgroundColor: Color = MaterialTheme.colors.surface,
    drawerContentColor: Color = contentColorFor(drawerBackgroundColor),
    drawerScrimColor: Color = DrawerDefaults.scrimColor,
    backgroundColor: Color = MaterialTheme.colors.background,
    contentColor: Color = contentColorFor(backgroundColor),
    content: @Composable (PaddingValues) -> Unit
): Unit

Material Design layout.

Scaffold implements the basic material design visual layout structure.

This component provides API to put together several material components to construct your screen, by ensuring proper layout strategy for them and collecting necessary data so these components will work together correctly.

For similar components that implement different layout structures, see BackdropScaffold, which uses a backdrop as the centerpiece of the screen, and BottomSheetScaffold, which uses a persistent bottom sheet as the centerpiece of the screen.

This particular overload provides ability to specify WindowInsets. Recommended value can be found in ScaffoldDefaults.contentWindowInsets.

Simple example of a Scaffold with TopAppBar, FloatingActionButton and drawer:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    drawerContent = { Text("Drawer content") },
    topBar = {
        TopAppBar(
            title = { Text("Simple Scaffold Screen") },
            navigationIcon = {
                IconButton(
                    onClick = {
                        scope.launch { scaffoldState.drawerState.open() }
                    }
                ) {
                    Icon(Icons.Filled.Menu, contentDescription = "Localized description")
                }
            }
        )
    },
    floatingActionButtonPosition = FabPosition.End,
    floatingActionButton = {
        ExtendedFloatingActionButton(
            text = { Text("Inc") },
            onClick = { /* fab click handler */ }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        LazyColumn(contentPadding = innerPadding) {
            items(count = 100) {
                Box(
                    Modifier
                        .fillMaxWidth()
                        .height(50.dp)
                        .background(colors[it % colors.size])
                )
            }
        }
    }
)

More fancy usage with BottomAppBar with cutout and docked FloatingActionButton, which animates it's shape when clicked:

import androidx.compose.animation.core.Animatable
import androidx.compose.animation.core.TweenSpec
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.shape.CutCornerShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.BottomAppBar
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()

// Consider negative values to mean 'cut corner' and positive values to mean 'round corner'
val sharpEdgePercent = -50f
val roundEdgePercent = 45f
// Start with sharp edges
val animatedProgress = remember { Animatable(sharpEdgePercent) }
// Create a coroutineScope for the animation
val coroutineScope = rememberCoroutineScope()
// animation value to animate shape
val progress = animatedProgress.value.roundToInt()

// When progress is 0, there is no modification to the edges so we are just drawing a rectangle.
// This allows for a smooth transition between cut corners and round corners.
val fabShape = if (progress < 0) {
    CutCornerShape(abs(progress))
} else if (progress == roundEdgePercent.toInt()) {
    CircleShape
} else {
    RoundedCornerShape(progress)
}
// lambda to call to trigger shape animation
val changeShape: () -> Unit = {
    val target = animatedProgress.targetValue
    val nextTarget = if (target == roundEdgePercent) sharpEdgePercent else roundEdgePercent
    coroutineScope.launch {
        animatedProgress.animateTo(
            targetValue = nextTarget,
            animationSpec = TweenSpec(durationMillis = 600)
        )
    }
}

Scaffold(
    scaffoldState = scaffoldState,
    drawerContent = { Text("Drawer content") },
    topBar = { TopAppBar(title = { Text("Scaffold with bottom cutout") }) },
    bottomBar = {
        BottomAppBar(cutoutShape = fabShape) {
            IconButton(
                onClick = {
                    coroutineScope.launch { scaffoldState.drawerState.open() }
                }
            ) {
                Icon(Icons.Filled.Menu, contentDescription = "Localized description")
            }
        }
    },
    floatingActionButton = {
        ExtendedFloatingActionButton(
            text = { Text("Change shape") },
            onClick = changeShape,
            shape = fabShape
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    floatingActionButtonPosition = FabPosition.Center,
    isFloatingActionButtonDocked = true,
    content = { innerPadding ->
        LazyColumn(contentPadding = innerPadding) {
            items(count = 100) {
                Box(
                    Modifier
                        .fillMaxWidth()
                        .height(50.dp)
                        .background(colors[it % colors.size])
                )
            }
        }
    }
)

To show a Snackbar, use SnackbarHostState.showSnackbar. Scaffold state already have ScaffoldState.snackbarHostState when created

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                // show snackbar as a suspend function
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Body content",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)
Parameters
contentWindowInsets: WindowInsets

window insets to be passed to content slot via PaddingValues params. Scaffold will take the insets into account from the top/bottom only if the topBar/ bottomBar are not present, as the scaffold expect topBar/bottomBar to handle insets instead. Any insets consumed by other insets padding modifiers or consumeWindowInsets on a parent layout will be excluded from contentWindowInsets.

modifier: Modifier = Modifier

optional Modifier for the root of the Scaffold

scaffoldState: ScaffoldState = rememberScaffoldState()

state of this scaffold widget. It contains the state of the screen, e.g. variables to provide manual control over the drawer behavior, sizes of components, etc

topBar: @Composable () -> Unit = {}

top app bar of the screen. Consider using TopAppBar.

bottomBar: @Composable () -> Unit = {}

bottom bar of the screen. Consider using BottomAppBar.

snackbarHost: @Composable (SnackbarHostState) -> Unit = { SnackbarHost(it) }

component to host Snackbars that are pushed to be shown via SnackbarHostState.showSnackbar. Usually it's a SnackbarHost

floatingActionButton: @Composable () -> Unit = {}

Main action button of your screen. Consider using FloatingActionButton for this slot.

floatingActionButtonPosition: FabPosition = FabPosition.End

position of the FAB on the screen. See FabPosition for possible options available.

isFloatingActionButtonDocked: Boolean = false

whether floatingActionButton should overlap with bottomBar for half a height, if bottomBar exists. Ignored if there's no bottomBar or no floatingActionButton.

drawerContent: (@Composable ColumnScope.() -> Unit)? = null

content of the Drawer sheet that can be pulled from the left side (right for RTL).

drawerGesturesEnabled: Boolean = true

whether or not drawer (if set) can be interacted with via gestures

drawerShape: Shape = MaterialTheme.shapes.large

shape of the drawer sheet (if set)

drawerElevation: Dp = DrawerDefaults.Elevation

drawer sheet elevation. This controls the size of the shadow below the drawer sheet (if set)

drawerBackgroundColor: Color = MaterialTheme.colors.surface

background color to be used for the drawer sheet

drawerContentColor: Color = contentColorFor(drawerBackgroundColor)

color of the content to use inside the drawer sheet. Defaults to either the matching content color for drawerBackgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

drawerScrimColor: Color = DrawerDefaults.scrimColor

color of the scrim that obscures content when the drawer is open

backgroundColor: Color = MaterialTheme.colors.background

background of the scaffold body

contentColor: Color = contentColorFor(backgroundColor)

color of the content in scaffold body. Defaults to either the matching content color for backgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

content: @Composable (PaddingValues) -> Unit

content of your screen. The lambda receives an PaddingValues that should be applied to the content root via Modifier.padding to properly offset top and bottom bars. If you're using VerticalScroller, apply this modifier to the child of the scroller, and not on the scroller itself.

ScrollableTabRow

@Composable
@UiComposable
fun ScrollableTabRow(
    selectedTabIndex: Int,
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    edgePadding: Dp = TabRowDefaults.ScrollableTabRowPadding,
    indicator: @Composable @UiComposable (tabPositions: List<TabPosition>) -> Unit = @Composable { tabPositions -> TabRowDefaults.Indicator( Modifier.tabIndicatorOffset(tabPositions[selectedTabIndex]) ) },
    divider: @Composable @UiComposable () -> Unit = @Composable { TabRowDefaults.Divider() },
    tabs: @Composable @UiComposable () -> Unit
): Unit

Material Design scrollable tabs.

When a set of tabs cannot fit on screen, use scrollable tabs. Scrollable tabs can use longer text labels and a larger number of tabs. They are best used for browsing on touch interfaces.

Scrollable tabs image

A ScrollableTabRow contains a row of Tabs, and displays an indicator underneath the currently selected tab. A ScrollableTabRow places its tabs offset from the starting edge, and allows scrolling to tabs that are placed off screen. For a fixed tab row that does not allow scrolling, and evenly places its tabs, see TabRow.

Parameters
selectedTabIndex: Int

the index of the currently selected tab

modifier: Modifier = Modifier

optional Modifier for this ScrollableTabRow

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the ScrollableTabRow. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this ScrollableTabRow to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this ScrollableTabRow.

edgePadding: Dp = TabRowDefaults.ScrollableTabRowPadding

the padding between the starting and ending edge of ScrollableTabRow, and the tabs inside the ScrollableTabRow. This padding helps inform the user that this tab row can be scrolled, unlike a TabRow.

indicator: @Composable @UiComposable (tabPositions: List<TabPosition>) -> Unit = @Composable { tabPositions -> TabRowDefaults.Indicator( Modifier.tabIndicatorOffset(tabPositions[selectedTabIndex]) ) }

the indicator that represents which tab is currently selected. By default this will be a TabRowDefaults.Indicator, using a TabRowDefaults.tabIndicatorOffset modifier to animate its position. Note that this indicator will be forced to fill up the entire ScrollableTabRow, so you should use TabRowDefaults.tabIndicatorOffset or similar to animate the actual drawn indicator inside this space, and provide an offset from the start.

divider: @Composable @UiComposable () -> Unit = @Composable { TabRowDefaults.Divider() }

the divider displayed at the bottom of the ScrollableTabRow. This provides a layer of separation between the ScrollableTabRow and the content displayed underneath.

tabs: @Composable @UiComposable () -> Unit

the tabs inside this ScrollableTabRow. Typically this will be multiple Tabs. Each element inside this lambda will be measured and placed evenly across the TabRow, each taking up equal space.

Slider

@Composable
fun Slider(
    value: Float,
    onValueChange: (Float) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    valueRange: ClosedFloatingPointRange<Float> = 0f..1f,
    steps: @IntRange(from = 0) Int = 0,
    onValueChangeFinished: (() -> Unit)? = null,
    interactionSource: MutableInteractionSource? = null,
    colors: SliderColors = SliderDefaults.colors()
): Unit

Material Design slider.

Sliders allow users to make selections from a range of values.

Sliders reflect a range of values along a bar, from which users may select a single value. They are ideal for adjusting settings such as volume, brightness, or applying image filters.

Sliders image

Use continuous sliders to allow users to make meaningful selections that don’t require a specific value:

import androidx.compose.material.Slider
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var sliderPosition by remember { mutableStateOf(0f) }
Text(text = sliderPosition.toString())
Slider(value = sliderPosition, onValueChange = { sliderPosition = it })

You can allow the user to choose only between predefined set of values by specifying the amount of steps between min and max values:

import androidx.compose.material.Slider
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var sliderPosition by remember { mutableStateOf(0f) }
Text(text = sliderPosition.toString())
Slider(
    value = sliderPosition,
    onValueChange = { sliderPosition = it },
    valueRange = 0f..100f,
    onValueChangeFinished = {
        // launch some business logic update with the state you hold
        // viewModel.updateSelectedSliderValue(sliderPosition)
    },
    steps = 5,
    colors = SliderDefaults.colors(
        thumbColor = MaterialTheme.colors.secondary,
        activeTrackColor = MaterialTheme.colors.secondary
    )
)
Parameters
value: Float

current value of the Slider. If outside of valueRange provided, value will be coerced to this range.

onValueChange: (Float) -> Unit

lambda in which value should be updated

modifier: Modifier = Modifier

modifiers for the Slider layout

enabled: Boolean = true

whether or not component is enabled and can be interacted with or not

valueRange: ClosedFloatingPointRange<Float> = 0f..1f

range of values that Slider value can take. Passed value will be coerced to this range

steps: @IntRange(from = 0) Int = 0

if greater than 0, specifies the amounts of discrete values, evenly distributed between across the whole value range. If 0, slider will behave as a continuous slider and allow to choose any value from the range specified. Must not be negative.

onValueChangeFinished: (() -> Unit)? = null

lambda to be invoked when value change has ended. This callback shouldn't be used to update the slider value (use onValueChange for that), but rather to know when the user has completed selecting a new value by ending a drag or a click.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this slider. You can use this to change the slider's appearance or preview the slider in different states. Note that if null is provided, interactions will still happen internally.

colors: SliderColors = SliderDefaults.colors()

SliderColors that will be used to determine the color of the Slider parts in different state. See SliderDefaults.colors to customize.

@Composable
fun Snackbar(
    modifier: Modifier = Modifier,
    action: (@Composable () -> Unit)? = null,
    actionOnNewLine: Boolean = false,
    shape: Shape = MaterialTheme.shapes.small,
    backgroundColor: Color = SnackbarDefaults.backgroundColor,
    contentColor: Color = MaterialTheme.colors.surface,
    elevation: Dp = 6.dp,
    content: @Composable () -> Unit
): Unit

Material Design snackbar.

Snackbars provide brief messages about app processes at the bottom of the screen.

Snackbars inform users of a process that an app has performed or will perform. They appear temporarily, towards the bottom of the screen. They shouldn’t interrupt the user experience, and they don’t require user input to disappear.

A Snackbar can contain a single action. Because Snackbar disappears automatically, the action shouldn't be "Dismiss" or "Cancel".

Snackbars image

This components provides only the visuals of the Snackbar. If you need to show a Snackbar with defaults on the screen, use ScaffoldState.snackbarHostState and SnackbarHostState.showSnackbar:

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                // show snackbar as a suspend function
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Body content",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)

If you want to customize appearance of the Snackbar, you can pass your own version as a child of the SnackbarHost to the Scaffold:

import androidx.compose.foundation.border
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Snackbar
import androidx.compose.material.SnackbarHost
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    snackbarHost = {
        // reuse default SnackbarHost to have default animation and timing handling
        SnackbarHost(it) { data ->
            // custom snackbar with the custom border
            Snackbar(
                modifier = Modifier.border(2.dp, MaterialTheme.colors.secondary),
                snackbarData = data
            )
        }
    },
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Custom Snackbar Demo",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)
Parameters
modifier: Modifier = Modifier

modifiers for the Snackbar layout

action: (@Composable () -> Unit)? = null

action / button component to add as an action to the snackbar. Consider using SnackbarDefaults.primaryActionColor as the color for the action, if you do not have a predefined color you wish to use instead.

actionOnNewLine: Boolean = false

whether or not action should be put on the separate line. Recommended for action with long action text

shape: Shape = MaterialTheme.shapes.small

Defines the Snackbar's shape as well as its shadow

backgroundColor: Color = SnackbarDefaults.backgroundColor

background color of the Snackbar

contentColor: Color = MaterialTheme.colors.surface

color of the content to use inside the snackbar. Defaults to either the matching content color for backgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

elevation: Dp = 6.dp

The z-coordinate at which to place the SnackBar. This controls the size of the shadow below the SnackBar

content: @Composable () -> Unit

content to show information about a process that an app has performed or will perform

@Composable
fun Snackbar(
    snackbarData: SnackbarData,
    modifier: Modifier = Modifier,
    actionOnNewLine: Boolean = false,
    shape: Shape = MaterialTheme.shapes.small,
    backgroundColor: Color = SnackbarDefaults.backgroundColor,
    contentColor: Color = MaterialTheme.colors.surface,
    actionColor: Color = SnackbarDefaults.primaryActionColor,
    elevation: Dp = 6.dp
): Unit

Material Design snackbar.

Snackbars provide brief messages about app processes at the bottom of the screen.

Snackbars inform users of a process that an app has performed or will perform. They appear temporarily, towards the bottom of the screen. They shouldn’t interrupt the user experience, and they don’t require user input to disappear.

A Snackbar can contain a single action. Because they disappear automatically, the action shouldn't be "Dismiss" or "Cancel".

Snackbars image

This version of snackbar is designed to work with SnackbarData provided by the SnackbarHost, which is usually used inside of the Scaffold.

This components provides only the visuals of the Snackbar. If you need to show a Snackbar with defaults on the screen, use ScaffoldState.snackbarHostState and SnackbarHostState.showSnackbar:

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                // show snackbar as a suspend function
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Body content",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)

If you want to customize appearance of the Snackbar, you can pass your own version as a child of the SnackbarHost to the Scaffold:

import androidx.compose.foundation.border
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Snackbar
import androidx.compose.material.SnackbarHost
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    snackbarHost = {
        // reuse default SnackbarHost to have default animation and timing handling
        SnackbarHost(it) { data ->
            // custom snackbar with the custom border
            Snackbar(
                modifier = Modifier.border(2.dp, MaterialTheme.colors.secondary),
                snackbarData = data
            )
        }
    },
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Custom Snackbar Demo",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)
Parameters
snackbarData: SnackbarData

data about the current snackbar showing via SnackbarHostState

modifier: Modifier = Modifier

modifiers for the Snackbar layout

actionOnNewLine: Boolean = false

whether or not action should be put on the separate line. Recommended for action with long action text

shape: Shape = MaterialTheme.shapes.small

Defines the Snackbar's shape as well as its shadow

backgroundColor: Color = SnackbarDefaults.backgroundColor

background color of the Snackbar

contentColor: Color = MaterialTheme.colors.surface

color of the content to use inside the snackbar. Defaults to either the matching content color for backgroundColor, or, if it is not a color from the theme, this will keep the same value set above this Surface.

actionColor: Color = SnackbarDefaults.primaryActionColor

color of the action

elevation: Dp = 6.dp

The z-coordinate at which to place the SnackBar. This controls the size of the shadow below the SnackBar

SnackbarHost

@Composable
fun SnackbarHost(
    hostState: SnackbarHostState,
    modifier: Modifier = Modifier,
    snackbar: @Composable (SnackbarData) -> Unit = { Snackbar(it) }
): Unit

Host for Snackbars to be used in Scaffold to properly show, hide and dismiss items based on material specification and the hostState.

This component with default parameters comes build-in with Scaffold, if you need to show a default Snackbar, use use ScaffoldState.snackbarHostState and SnackbarHostState.showSnackbar.

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                // show snackbar as a suspend function
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Body content",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)

If you want to customize appearance of the Snackbar, you can pass your own version as a child of the SnackbarHost to the Scaffold:

import androidx.compose.foundation.border
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.wrapContentSize
import androidx.compose.material.ExtendedFloatingActionButton
import androidx.compose.material.Scaffold
import androidx.compose.material.Snackbar
import androidx.compose.material.SnackbarHost
import androidx.compose.material.Text
import androidx.compose.material.rememberScaffoldState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope

val scaffoldState = rememberScaffoldState()
val scope = rememberCoroutineScope()
Scaffold(
    scaffoldState = scaffoldState,
    snackbarHost = {
        // reuse default SnackbarHost to have default animation and timing handling
        SnackbarHost(it) { data ->
            // custom snackbar with the custom border
            Snackbar(
                modifier = Modifier.border(2.dp, MaterialTheme.colors.secondary),
                snackbarData = data
            )
        }
    },
    floatingActionButton = {
        var clickCount by remember { mutableStateOf(0) }
        ExtendedFloatingActionButton(
            text = { Text("Show snackbar") },
            onClick = {
                scope.launch {
                    scaffoldState.snackbarHostState.showSnackbar("Snackbar # ${++clickCount}")
                }
            }
        )
    },
    contentWindowInsets = ScaffoldDefaults.contentWindowInsets,
    content = { innerPadding ->
        Text(
            text = "Custom Snackbar Demo",
            modifier = Modifier.padding(innerPadding).fillMaxSize().wrapContentSize()
        )
    }
)
Parameters
hostState: SnackbarHostState

state of this component to read and show Snackbars accordingly

modifier: Modifier = Modifier

optional modifier for this component

snackbar: @Composable (SnackbarData) -> Unit = { Snackbar(it) }

the instance of the Snackbar to be shown at the appropriate time with appearance based on the SnackbarData provided as a param

@Composable
fun Surface(
    modifier: Modifier = Modifier,
    shape: Shape = RectangleShape,
    color: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(color),
    border: BorderStroke? = null,
    elevation: Dp = 0.dp,
    content: @Composable () -> Unit
): Unit

Material Design surface.

Material surface is the central metaphor in material design. Each surface exists at a given elevation, which influences how that piece of surface visually relates to other surfaces and how that surface casts shadows.

See the other overloads for clickable, selectable, and toggleable surfaces.

The Surface is responsible for:

  1. Clipping: Surface clips its children to the shape specified by shape

  2. Elevation: Surface draws a shadow to represent depth, where elevation represents the depth of this surface. If the passed shape is concave the shadow will not be drawn on Android versions less than 10.

  3. Borders: If shape has a border, then it will also be drawn.

  4. Background: Surface fills the shape specified by shape with the color. If color is Colors.surface, the ElevationOverlay from LocalElevationOverlay will be used to apply an overlay - by default this will only occur in dark theme. The color of the overlay depends on the elevation of this Surface, and the LocalAbsoluteElevation set by any parent surfaces. This ensures that a Surface never appears to have a lower elevation overlay than its ancestors, by summing the elevation of all previous Surfaces.

  5. Content color: Surface uses contentColor to specify a preferred color for the content of this surface - this is used by the Text and Icon components as a default color.

  6. Blocking touch propagation behind the surface.

If no contentColor is set, this surface will try and match its background color to a color defined in the theme Colors, and return the corresponding content color. For example, if the color of this surface is Colors.surface, contentColor will be set to Colors.onSurface. If color is not part of the theme palette, contentColor will keep the same value set above this Surface.

import androidx.compose.material.Surface
import androidx.compose.material.Text

Surface(
    color = MaterialTheme.colors.background
) {
    Text("Text color is `onBackground`")
}

To modify these default style values used by text, use ProvideTextStyle or explicitly pass a new TextStyle to your text.

To manually retrieve the content color inside a surface, use LocalContentColor.

Parameters
modifier: Modifier = Modifier

Modifier to be applied to the layout corresponding to the surface

shape: Shape = RectangleShape

Defines the surface's shape as well its shadow. A shadow is only displayed if the elevation is greater than zero.

color: Color = MaterialTheme.colors.surface

The background color. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(color)

The preferred content color provided by this Surface to its children. Defaults to either the matching content color for color, or if color is not a color from the theme, this will keep the same value set above this Surface.

border: BorderStroke? = null

Optional border to draw on top of the surface

elevation: Dp = 0.dp

The size of the shadow below the surface. Note that It will not affect z index of the Surface. If you want to change the drawing order you can use Modifier.zIndex.

@ExperimentalMaterialApi
@Composable
fun Surface(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    shape: Shape = RectangleShape,
    color: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(color),
    border: BorderStroke? = null,
    elevation: Dp = 0.dp,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit
): Unit

Material surface is the central metaphor in material design. Each surface exists at a given elevation, which influences how that piece of surface visually relates to other surfaces and how that surface casts shadows.

This version of Surface is responsible for a click handling as well al everything else that a regular Surface does:

This clickable Surface is responsible for:

  1. Clipping: Surface clips its children to the shape specified by shape

  2. Elevation: Surface draws a shadow to represent depth, where elevation represents the depth of this surface. If the passed shape is convex the shadow will not be drawn on Android versions less than 10.

  3. Borders: If shape has a border, then it will also be drawn.

  4. Background: Surface fills the shape specified by shape with the color. If color is Colors.surface, the ElevationOverlay from LocalElevationOverlay will be used to apply an overlay - by default this will only occur in dark theme. The color of the overlay depends on the elevation of this Surface, and the LocalAbsoluteElevation set by any parent surfaces. This ensures that a Surface never appears to have a lower elevation overlay than its ancestors, by summing the elevation of all previous Surfaces.

  5. Content color: Surface uses contentColor to specify a preferred color for the content of this surface - this is used by the Text and Icon components as a default color. If no contentColor is set, this surface will try and match its background color to a color defined in the theme Colors, and return the corresponding content color. For example, if the color of this surface is Colors.surface, contentColor will be set to Colors.onSurface. If color is not part of the theme palette, contentColor will keep the same value set above this Surface.

  6. Click handling. This version of surface will react to the clicks, calling onClick lambda, updating the interactionSource when PressInteraction occurs, and showing ripple indication in response to press events. If you don't need click handling, consider using the Surface function that doesn't require onClick param.

  7. Semantics for clicks. Just like with Modifier.clickable, clickable version of Surface will produce semantics to indicate that it is clicked. No semantic role is set by default, you may specify one by passing a desired Role with a Modifier.semantics.

import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var count by remember { mutableStateOf(0) }
Surface(
    onClick = { count++ },
    color = MaterialTheme.colors.background
) {
    Text("Clickable surface Text with `onBackground` color and count: $count")
}

To modify these default style values used by text, use ProvideTextStyle or explicitly pass a new TextStyle to your text.

To manually retrieve the content color inside a surface, use LocalContentColor.

Parameters
onClick: () -> Unit

callback to be called when the surface is clicked

modifier: Modifier = Modifier

Modifier to be applied to the layout corresponding to the surface

enabled: Boolean = true

Controls the enabled state of the surface. When false, this surface will not be clickable

shape: Shape = RectangleShape

Defines the surface's shape as well its shadow. A shadow is only displayed if the elevation is greater than zero.

color: Color = MaterialTheme.colors.surface

The background color. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(color)

The preferred content color provided by this Surface to its children. Defaults to either the matching content color for color, or if color is not a color from the theme, this will keep the same value set above this Surface.

border: BorderStroke? = null

Optional border to draw on top of the surface

elevation: Dp = 0.dp

The size of the shadow below the surface. Note that It will not affect z index of the Surface. If you want to change the drawing order you can use Modifier.zIndex.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this surface. You can use this to change the surface's appearance or preview the surface in different states. Note that if null is provided, interactions will still happen internally.

@ExperimentalMaterialApi
@Composable
fun Surface(
    checked: Boolean,
    onCheckedChange: (Boolean) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    shape: Shape = RectangleShape,
    color: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(color),
    border: BorderStroke? = null,
    elevation: Dp = 0.dp,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit
): Unit

Material surface is the central metaphor in material design. Each surface exists at a given elevation, which influences how that piece of surface visually relates to other surfaces and how that surface casts shadows.

This version of Surface is responsible for a toggling its checked state as well as everything else that a regular Surface does:

This toggleable Surface is responsible for:

  1. Clipping: Surface clips its children to the shape specified by shape

  2. Elevation: Surface draws a shadow to represent depth, where elevation represents the depth of this surface. If the passed shape is convex the shadow will not be drawn on Android versions less than 10.

  3. Borders: If shape has a border, then it will also be drawn.

  4. Background: Surface fills the shape specified by shape with the color. If color is Colors.surface, the ElevationOverlay from LocalElevationOverlay will be used to apply an overlay - by default this will only occur in dark theme. The color of the overlay depends on the elevation of this Surface, and the LocalAbsoluteElevation set by any parent surfaces. This ensures that a Surface never appears to have a lower elevation overlay than its ancestors, by summing the elevation of all previous Surfaces.

  5. Content color: Surface uses contentColor to specify a preferred color for the content of this surface - this is used by the Text and Icon components as a default color. If no contentColor is set, this surface will try and match its background color to a color defined in the theme Colors, and return the corresponding content color. For example, if the color of this surface is Colors.surface, contentColor will be set to Colors.onSurface. If color is not part of the theme palette, contentColor will keep the same value set above this Surface.

  6. Click handling. This version of surface will react to the check toggles, calling onCheckedChange lambda, updating the interactionSource when PressInteraction occurs, and showing ripple indication in response to press events. If you don't need check handling, consider using a Surface function that doesn't require onCheckedChange param.

  7. Semantics for toggle. Just like with Modifier.toggleable, toggleable version of Surface will produce semantics to indicate that it is checked. No semantic role is set by default, you may specify one by passing a desired Role with a Modifier.semantics.

import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var checked by remember { mutableStateOf(false) }
Surface(
    checked = checked,
    onCheckedChange = { checked = !checked },
    color = if (checked) {
        MaterialTheme.colors.primary
    } else {
        MaterialTheme.colors.background
    }
) {
    Text(
        text = if (checked) "ON" else "OFF",
        textAlign = TextAlign.Center
    )
}

To modify these default style values used by text, use ProvideTextStyle or explicitly pass a new TextStyle to your text.

To manually retrieve the content color inside a surface, use LocalContentColor.

Parameters
checked: Boolean

whether or not this Surface is toggled on or off

onCheckedChange: (Boolean) -> Unit

callback to be invoked when the toggleable Surface is clicked

modifier: Modifier = Modifier

Modifier to be applied to the layout corresponding to the surface

enabled: Boolean = true

Controls the enabled state of the surface. When false, this surface will not be selectable

shape: Shape = RectangleShape

Defines the surface's shape as well its shadow. A shadow is only displayed if the elevation is greater than zero.

color: Color = MaterialTheme.colors.surface

The background color. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(color)

The preferred content color provided by this Surface to its children. Defaults to either the matching content color for color, or if color is not a color from the theme, this will keep the same value set above this Surface.

border: BorderStroke? = null

Optional border to draw on top of the surface

elevation: Dp = 0.dp

The size of the shadow below the surface. Note that It will not affect z index of the Surface. If you want to change the drawing order you can use Modifier.zIndex.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this surface. You can use this to change the surface's appearance or preview the surface in different states. Note that if null is provided, interactions will still happen internally.

@ExperimentalMaterialApi
@Composable
fun Surface(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    shape: Shape = RectangleShape,
    color: Color = MaterialTheme.colors.surface,
    contentColor: Color = contentColorFor(color),
    border: BorderStroke? = null,
    elevation: Dp = 0.dp,
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit
): Unit

Material surface is the central metaphor in material design. Each surface exists at a given elevation, which influences how that piece of surface visually relates to other surfaces and how that surface casts shadows.

This version of Surface is responsible for a selection handling as well as everything else that a regular Surface does:

This selectable Surface is responsible for:

  1. Clipping: Surface clips its children to the shape specified by shape

  2. Elevation: Surface draws a shadow to represent depth, where elevation represents the depth of this surface. If the passed shape is convex the shadow will not be drawn on Android versions less than 10.

  3. Borders: If shape has a border, then it will also be drawn.

  4. Background: Surface fills the shape specified by shape with the color. If color is Colors.surface, the ElevationOverlay from LocalElevationOverlay will be used to apply an overlay - by default this will only occur in dark theme. The color of the overlay depends on the elevation of this Surface, and the LocalAbsoluteElevation set by any parent surfaces. This ensures that a Surface never appears to have a lower elevation overlay than its ancestors, by summing the elevation of all previous Surfaces.

  5. Content color: Surface uses contentColor to specify a preferred color for the content of this surface - this is used by the Text and Icon components as a default color. If no contentColor is set, this surface will try and match its background color to a color defined in the theme Colors, and return the corresponding content color. For example, if the color of this surface is Colors.surface, contentColor will be set to Colors.onSurface. If color is not part of the theme palette, contentColor will keep the same value set above this Surface.

  6. Click handling. This version of surface will react to the clicks, calling onClick lambda, updating the interactionSource when PressInteraction occurs, and showing ripple indication in response to press events. If you don't need click handling, consider using the Surface function that doesn't require onClick param.

  7. Semantics for selection. Just like with Modifier.selectable, selectable version of Surface will produce semantics to indicate that it is selected. No semantic role is set by default, you may specify one by passing a desired Role with a Modifier.semantics.

import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var selected by remember { mutableStateOf(false) }
Surface(
    selected = selected,
    onClick = { selected = !selected },
    color = MaterialTheme.colors.background
) {
    Text(
        text = if (selected) "Selected" else "Not Selected",
        textAlign = TextAlign.Center
    )
}

To modify these default style values used by text, use ProvideTextStyle or explicitly pass a new TextStyle to your text.

To manually retrieve the content color inside a surface, use LocalContentColor.

Parameters
selected: Boolean

whether this Surface is selected

onClick: () -> Unit

callback to be called when the surface is clicked

modifier: Modifier = Modifier

Modifier to be applied to the layout corresponding to the surface

enabled: Boolean = true

Controls the enabled state of the surface. When false, this surface will not be selectable

shape: Shape = RectangleShape

Defines the surface's shape as well its shadow. A shadow is only displayed if the elevation is greater than zero.

color: Color = MaterialTheme.colors.surface

The background color. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(color)

The preferred content color provided by this Surface to its children. Defaults to either the matching content color for color, or if color is not a color from the theme, this will keep the same value set above this Surface.

border: BorderStroke? = null

Optional border to draw on top of the surface

elevation: Dp = 0.dp

The size of the shadow below the surface. Note that It will not affect z index of the Surface. If you want to change the drawing order you can use Modifier.zIndex.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this surface. You can use this to change the surface's appearance or preview the surface in different states. Note that if null is provided, interactions will still happen internally.

SwipeToDismiss

@Composable
@ExperimentalMaterialApi
@<Error class: unknown class>
fun SwipeToDismiss(
    state: DismissState,
    modifier: Modifier = Modifier,
    directions: Set<DismissDirection> = setOf(EndToStart, StartToEnd),
    dismissThresholds: (DismissDirection) -> ThresholdConfig = { FixedThreshold(DISMISS_THRESHOLD) },
    background: @Composable RowScope.() -> Unit,
    dismissContent: @Composable RowScope.() -> Unit
): Unit

A composable that can be dismissed by swiping left or right.

import androidx.compose.animation.animateColorAsState
import androidx.compose.animation.core.animateDpAsState
import androidx.compose.animation.core.animateFloatAsState
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.items
import androidx.compose.material.Card
import androidx.compose.material.Icon
import androidx.compose.material.ListItem
import androidx.compose.material.SwipeToDismiss
import androidx.compose.material.Text
import androidx.compose.material.rememberDismissState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.draw.scale

// This is an example of a list of dismissible items, similar to what you would see in an
// email app. Swiping left reveals a 'delete' icon and swiping right reveals a 'done' icon.
// The background will start as grey, but once the dismiss threshold is reached, the colour
// will animate to red if you're swiping left or green if you're swiping right. When you let
// go, the item will animate out of the way if you're swiping left (like deleting an email) or
// back to its default position if you're swiping right (like marking an email as read/unread).
LazyColumn {
    items(items) { item ->
        var unread by remember { mutableStateOf(false) }
        val dismissState = rememberDismissState(
            confirmStateChange = {
                if (it == DismissedToEnd) unread = !unread
                it != DismissedToEnd
            }
        )
        SwipeToDismiss(
            state = dismissState,
            modifier = Modifier.padding(vertical = 4.dp),
            directions = setOf(StartToEnd, EndToStart),
            background = {
                val direction = dismissState.dismissDirection ?: return@SwipeToDismiss
                val color by animateColorAsState(
                    when (dismissState.targetValue) {
                        Default -> Color.LightGray
                        DismissedToEnd -> Color.Green
                        DismissedToStart -> Color.Red
                    }
                )
                val alignment = when (direction) {
                    StartToEnd -> Alignment.CenterStart
                    EndToStart -> Alignment.CenterEnd
                }
                val icon = when (direction) {
                    StartToEnd -> Icons.Default.Done
                    EndToStart -> Icons.Default.Delete
                }
                val scale by animateFloatAsState(
                    if (dismissState.targetValue == Default) 0.75f else 1f
                )

                Box(
                    Modifier.fillMaxSize().background(color).padding(horizontal = 20.dp),
                    contentAlignment = alignment
                ) {
                    Icon(
                        icon,
                        contentDescription = "Localized description",
                        modifier = Modifier.scale(scale)
                    )
                }
            },
            dismissContent = {
                Card(
                    elevation = animateDpAsState(
                        if (dismissState.dismissDirection != null) 4.dp else 0.dp
                    ).value
                ) {
                    ListItem(
                        text = {
                            Text(item, fontWeight = if (unread) FontWeight.Bold else null)
                        },
                        secondaryText = { Text("Swipe me left or right!") }
                    )
                }
            }
        )
    }
}
Parameters
state: DismissState

The state of this component.

modifier: Modifier = Modifier

Optional Modifier for this component.

directions: Set<DismissDirection> = setOf(EndToStart, StartToEnd)

The set of directions in which the component can be dismissed.

dismissThresholds: (DismissDirection) -> ThresholdConfig = { FixedThreshold(DISMISS_THRESHOLD) }

The thresholds the item needs to be swiped in order to be dismissed.

background: @Composable RowScope.() -> Unit

A composable that is stacked behind the content and is exposed when the content is swiped. You can/should use the state to have different backgrounds on each side.

dismissContent: @Composable RowScope.() -> Unit

The content that can be dismissed.

Switch

@Composable
fun Switch(
    checked: Boolean,
    onCheckedChange: ((Boolean) -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    colors: SwitchColors = SwitchDefaults.colors()
): Unit

Material Design switch.

Switches toggle the state of a single item on or off.

Switches image

import androidx.compose.foundation.layout.Row
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.selection.toggleable
import androidx.compose.material.Switch
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

val checkedState = remember { mutableStateOf(true) }
Switch(
    checked = checkedState.value,
    onCheckedChange = { checkedState.value = it }
)

var pineappleOnPizza by remember { mutableStateOf(true) }

Row(
    Modifier
        .padding(16.dp)
        .toggleable(
            role = Role.Switch,
            value = pineappleOnPizza,
            onValueChange = { pineappleOnPizza = it },
        )
) {
    Switch(checked = pineappleOnPizza, onCheckedChange = null)
    Spacer(Modifier.width(8.dp))
    Text("Pineapple on pizza?")
}
Parameters
checked: Boolean

whether or not this component is checked

onCheckedChange: ((Boolean) -> Unit)?

callback to be invoked when Switch is being clicked, therefore the change of checked state is requested. If null, then this is passive and relies entirely on a higher-level component to control the "checked" state.

modifier: Modifier = Modifier

Modifier to be applied to the switch layout

enabled: Boolean = true

whether the component is enabled or grayed out

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this switch. You can use this to change the switch's appearance or preview the switch in different states. Note that if null is provided, interactions will still happen internally.

colors: SwitchColors = SwitchDefaults.colors()

SwitchColors that will be used to determine the color of the thumb and track in different states. See SwitchDefaults.colors.

@Composable
fun Tab(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    selectedContentColor: Color = LocalContentColor.current,
    unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium),
    content: @Composable ColumnScope.() -> Unit
): Unit

Material Design tab.

Tabs organize content across different screens, data sets, and other interactions.

Tab image

Generic Tab overload that is not opinionated about content / color. See the other overload for a Tab that has specific slots for text and / or an icon, as well as providing the correct colors for selected / unselected states.

A custom tab using this API may look like:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material.Tab
import androidx.compose.material.Text

Tab(selected, onClick) {
    Column(
        Modifier.padding(10.dp).height(50.dp).fillMaxWidth(),
        verticalArrangement = Arrangement.SpaceBetween
    ) {
        Box(
            Modifier.size(10.dp)
                .align(Alignment.CenterHorizontally)
                .background(color = if (selected) Color.Red else Color.White)
        )
        Text(
            text = title,
            style = MaterialTheme.typography.body1,
            modifier = Modifier.align(Alignment.CenterHorizontally)
        )
    }
}
Parameters
selected: Boolean

whether this tab is selected or not

onClick: () -> Unit

the callback to be invoked when this tab is selected

modifier: Modifier = Modifier

optional Modifier for this tab

enabled: Boolean = true

controls the enabled state of this tab. When false, this tab will not be clickable and will appear disabled to accessibility services.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this tab. You can use this to change the tab's appearance or preview the tab in different states. Note that if null is provided, interactions will still happen internally.

selectedContentColor: Color = LocalContentColor.current

the color for the content of this tab when selected, and the color of the ripple.

unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium)

the color for the content of this tab when not selected

content: @Composable ColumnScope.() -> Unit

the content of this tab

@Composable
fun Tab(
    selected: Boolean,
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    text: (@Composable () -> Unit)? = null,
    icon: (@Composable () -> Unit)? = null,
    interactionSource: MutableInteractionSource? = null,
    selectedContentColor: Color = LocalContentColor.current,
    unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium)
): Unit

Material Design tab.

Tabs organize content across different screens, data sets, and other interactions.

Tab image

A Tab represents a single page of content using a text label and/or icon. It represents its selected state by tinting the text label and/or image with selectedContentColor.

This should typically be used inside of a TabRow, see the corresponding documentation for example usage.

This Tab has slots for text and/or icon - see the other Tab overload for a generic Tab that is not opinionated about its content.

Parameters
selected: Boolean

whether this tab is selected or not

onClick: () -> Unit

the callback to be invoked when this tab is selected

modifier: Modifier = Modifier

optional Modifier for this tab

enabled: Boolean = true

controls the enabled state of this tab. When false, this tab will not be clickable and will appear disabled to accessibility services.

text: (@Composable () -> Unit)? = null

the text label displayed in this tab

icon: (@Composable () -> Unit)? = null

the icon displayed in this tab

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this tab. You can use this to change the tab's appearance or preview the tab in different states. Note that if null is provided, interactions will still happen internally.

selectedContentColor: Color = LocalContentColor.current

the color for the content of this tab when selected, and the color of the ripple.

unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium)

the color for the content of this tab when not selected

See also
LeadingIconTab
@Composable
@UiComposable
fun TabRow(
    selectedTabIndex: Int,
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    indicator: @Composable @UiComposable (tabPositions: List<TabPosition>) -> Unit = @Composable { tabPositions -> TabRowDefaults.Indicator( Modifier.tabIndicatorOffset(tabPositions[selectedTabIndex]) ) },
    divider: @Composable @UiComposable () -> Unit = @Composable { TabRowDefaults.Divider() },
    tabs: @Composable @UiComposable () -> Unit
): Unit

Material Design fixed tabs.

Fixed tabs display all tabs in a set simultaneously. They are best for switching between related content quickly, such as between transportation methods in a map. To navigate between fixed tabs, tap an individual tab, or swipe left or right in the content area.

Fixed tabs image

A TabRow contains a row of Tabs, and displays an indicator underneath the currently selected tab. A TabRow places its tabs evenly spaced along the entire row, with each tab taking up an equal amount of space. See ScrollableTabRow for a tab row that does not enforce equal size, and allows scrolling to tabs that do not fit on screen.

A simple example with text tabs looks like:

import androidx.compose.foundation.layout.Column
import androidx.compose.material.Tab
import androidx.compose.material.TabRow
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var state by remember { mutableStateOf(0) }
val titles = listOf("TAB 1", "TAB 2", "TAB 3 WITH LOTS OF TEXT")
Column {
    TabRow(selectedTabIndex = state) {
        titles.forEachIndexed { index, title ->
            Tab(
                text = { Text(title) },
                selected = state == index,
                onClick = { state = index }
            )
        }
    }
    Text(
        modifier = Modifier.align(Alignment.CenterHorizontally),
        text = "Text tab ${state + 1} selected",
        style = MaterialTheme.typography.body1
    )
}

You can also provide your own custom tab, such as:

import androidx.compose.foundation.layout.Column
import androidx.compose.material.TabRow
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var state by remember { mutableStateOf(0) }
val titles = listOf("TAB 1", "TAB 2", "TAB 3")
Column {
    TabRow(selectedTabIndex = state) {
        titles.forEachIndexed { index, title ->
            FancyTab(title = title, onClick = { state = index }, selected = (index == state))
        }
    }
    Text(
        modifier = Modifier.align(Alignment.CenterHorizontally),
        text = "Fancy tab ${state + 1} selected",
        style = MaterialTheme.typography.body1
    )
}

Where the custom tab itself could look like:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.fillMaxWidth
import androidx.compose.foundation.layout.height
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material.Tab
import androidx.compose.material.Text

Tab(selected, onClick) {
    Column(
        Modifier.padding(10.dp).height(50.dp).fillMaxWidth(),
        verticalArrangement = Arrangement.SpaceBetween
    ) {
        Box(
            Modifier.size(10.dp)
                .align(Alignment.CenterHorizontally)
                .background(color = if (selected) Color.Red else Color.White)
        )
        Text(
            text = title,
            style = MaterialTheme.typography.body1,
            modifier = Modifier.align(Alignment.CenterHorizontally)
        )
    }
}

As well as customizing the tab, you can also provide a custom indicator, to customize the indicator displayed for a tab. indicator will be placed to fill the entire TabRow, so it should internally take care of sizing and positioning the indicator to match changes to selectedTabIndex.

For example, given an indicator that draws a rounded rectangle near the edges of the Tab:

import androidx.compose.foundation.BorderStroke
import androidx.compose.foundation.border
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.shape.RoundedCornerShape

// Draws a rounded rectangular with border around the Tab, with a 5.dp padding from the edges
// Color is passed in as a parameter [color]
Box(
    modifier
        .padding(5.dp)
        .fillMaxSize()
        .border(BorderStroke(2.dp, color), RoundedCornerShape(5.dp))
)

We can reuse TabRowDefaults.tabIndicatorOffset and just provide this indicator, as we aren't changing how the size and position of the indicator changes between tabs:

import androidx.compose.foundation.layout.Column
import androidx.compose.material.Tab
import androidx.compose.material.TabRow
import androidx.compose.material.TabRowDefaults.tabIndicatorOffset
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var state by remember { mutableStateOf(0) }
val titles = listOf("TAB 1", "TAB 2", "TAB 3")

// Reuse the default offset animation modifier, but use our own indicator
val indicator = @Composable { tabPositions: List<TabPosition> ->
    FancyIndicator(Color.White, Modifier.tabIndicatorOffset(tabPositions[state]))
}

Column {
    TabRow(
        selectedTabIndex = state,
        indicator = indicator
    ) {
        titles.forEachIndexed { index, title ->
            Tab(
                text = { Text(title) },
                selected = state == index,
                onClick = { state = index }
            )
        }
    }
    Text(
        modifier = Modifier.align(Alignment.CenterHorizontally),
        text = "Fancy indicator tab ${state + 1} selected",
        style = MaterialTheme.typography.body1
    )
}

You may also want to use a custom transition, to allow you to dynamically change the appearance of the indicator as it animates between tabs, such as changing its color or size. indicator is stacked on top of the entire TabRow, so you just need to provide a custom transition that animates the offset of the indicator from the start of the TabRow. For example, take the following example that uses a transition to animate the offset, width, and color of the same FancyIndicator from before, also adding a physics based 'spring' effect to the indicator in the direction of motion:

import androidx.compose.animation.animateColor
import androidx.compose.animation.core.animateDp
import androidx.compose.animation.core.spring
import androidx.compose.animation.core.updateTransition
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.width
import androidx.compose.foundation.layout.wrapContentSize

val colors = listOf(Color.Yellow, Color.Red, Color.Green)
val transition = updateTransition(selectedTabIndex)
val indicatorStart by transition.animateDp(
    transitionSpec = {
        // Handle directionality here, if we are moving to the right, we
        // want the right side of the indicator to move faster, if we are
        // moving to the left, we want the left side to move faster.
        if (initialState < targetState) {
            spring(dampingRatio = 1f, stiffness = 50f)
        } else {
            spring(dampingRatio = 1f, stiffness = 1000f)
        }
    }
) {
    tabPositions[it].left
}

val indicatorEnd by transition.animateDp(
    transitionSpec = {
        // Handle directionality here, if we are moving to the right, we
        // want the right side of the indicator to move faster, if we are
        // moving to the left, we want the left side to move faster.
        if (initialState < targetState) {
            spring(dampingRatio = 1f, stiffness = 1000f)
        } else {
            spring(dampingRatio = 1f, stiffness = 50f)
        }
    }
) {
    tabPositions[it].right
}

val indicatorColor by transition.animateColor {
    colors[it % colors.size]
}

FancyIndicator(
    // Pass the current color to the indicator
    indicatorColor,
    modifier = Modifier
        // Fill up the entire TabRow, and place the indicator at the start
        .fillMaxSize()
        .wrapContentSize(align = Alignment.BottomStart)
        // Apply an offset from the start to correctly position the indicator around the tab
        .offset(x = indicatorStart)
        // Make the width of the indicator follow the animated width as we move between tabs
        .width(indicatorEnd - indicatorStart)
)

We can now just pass this indicator directly to TabRow:

import androidx.compose.foundation.layout.Column
import androidx.compose.material.Tab
import androidx.compose.material.TabRow
import androidx.compose.material.Text
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

var state by remember { mutableStateOf(0) }
val titles = listOf("TAB 1", "TAB 2", "TAB 3")

val indicator = @Composable { tabPositions: List<TabPosition> ->
    FancyAnimatedIndicator(tabPositions = tabPositions, selectedTabIndex = state)
}

Column {
    TabRow(
        selectedTabIndex = state,
        indicator = indicator
    ) {
        titles.forEachIndexed { index, title ->
            Tab(
                text = { Text(title) },
                selected = state == index,
                onClick = { state = index }
            )
        }
    }
    Text(
        modifier = Modifier.align(Alignment.CenterHorizontally),
        text = "Fancy transition tab ${state + 1} selected",
        style = MaterialTheme.typography.body1
    )
}
Parameters
selectedTabIndex: Int

the index of the currently selected tab

modifier: Modifier = Modifier

optional Modifier for this TabRow

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the TabRow. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this TabRow to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this TabRow.

indicator: @Composable @UiComposable (tabPositions: List<TabPosition>) -> Unit = @Composable { tabPositions -> TabRowDefaults.Indicator( Modifier.tabIndicatorOffset(tabPositions[selectedTabIndex]) ) }

the indicator that represents which tab is currently selected. By default this will be a TabRowDefaults.Indicator, using a TabRowDefaults.tabIndicatorOffset modifier to animate its position. Note that this indicator will be forced to fill up the entire TabRow, so you should use TabRowDefaults.tabIndicatorOffset or similar to animate the actual drawn indicator inside this space, and provide an offset from the start.

divider: @Composable @UiComposable () -> Unit = @Composable { TabRowDefaults.Divider() }

the divider displayed at the bottom of the TabRow. This provides a layer of separation between the TabRow and the content displayed underneath.

tabs: @Composable @UiComposable () -> Unit

the tabs inside this TabRow. Typically this will be multiple Tabs. Each element inside this lambda will be measured and placed evenly across the TabRow, each taking up equal space.

@Composable
fun Text(
    text: String,
    modifier: Modifier = Modifier,
    color: Color = Color.Unspecified,
    fontSize: TextUnit = TextUnit.Unspecified,
    fontStyle: FontStyle? = null,
    fontWeight: FontWeight? = null,
    fontFamily: FontFamily? = null,
    letterSpacing: TextUnit = TextUnit.Unspecified,
    textDecoration: TextDecoration? = null,
    textAlign: TextAlign? = null,
    lineHeight: TextUnit = TextUnit.Unspecified,
    overflow: TextOverflow = TextOverflow.Clip,
    softWrap: Boolean = true,
    maxLines: Int = Int.MAX_VALUE,
    minLines: Int = 1,
    onTextLayout: ((TextLayoutResult) -> Unit)? = null,
    style: TextStyle = LocalTextStyle.current
): Unit

High level element that displays text and provides semantics / accessibility information.

The default style uses the LocalTextStyle provided by the MaterialTheme / components. If you are setting your own style, you may want to consider first retrieving LocalTextStyle, and using TextStyle.copy to keep any theme defined attributes, only modifying the specific attributes you want to override.

For ease of use, commonly used parameters from TextStyle are also present here. The order of precedence is as follows:

  • If a parameter is explicitly set here (i.e, it is not null or TextUnit.Unspecified), then this parameter will always be used.

  • If a parameter is not set, (null or TextUnit.Unspecified), then the corresponding value from style will be used instead.

Additionally, for color, if color is not set, and style does not have a color, then LocalContentColor will be used with an alpha of LocalContentAlpha- this allows this Text or element containing this Text to adapt to different background colors and still maintain contrast and accessibility.

Parameters
text: String

The text to be displayed.

modifier: Modifier = Modifier

Modifier to apply to this layout node.

color: Color = Color.Unspecified

Color to apply to the text. If Color.Unspecified, and style has no color set, this will be LocalContentColor.

fontSize: TextUnit = TextUnit.Unspecified

The size of glyphs to use when painting the text. See TextStyle.fontSize.

fontStyle: FontStyle? = null

The typeface variant to use when drawing the letters (e.g., italic). See TextStyle.fontStyle.

fontWeight: FontWeight? = null

The typeface thickness to use when painting the text (e.g., FontWeight.Bold).

fontFamily: FontFamily? = null

The font family to be used when rendering the text. See TextStyle.fontFamily.

letterSpacing: TextUnit = TextUnit.Unspecified

The amount of space to add between each letter. See TextStyle.letterSpacing.

textDecoration: TextDecoration? = null

The decorations to paint on the text (e.g., an underline). See TextStyle.textDecoration.

textAlign: TextAlign? = null

The alignment of the text within the lines of the paragraph. See TextStyle.textAlign.

lineHeight: TextUnit = TextUnit.Unspecified

Line height for the Paragraph in TextUnit unit, e.g. SP or EM. See TextStyle.lineHeight.

overflow: TextOverflow = TextOverflow.Clip

How visual overflow should be handled.

softWrap: Boolean = true

Whether the text should break at soft line breaks. If false, the glyphs in the text will be positioned as if there was unlimited horizontal space. If softWrap is false, overflow and TextAlign may have unexpected effects.

maxLines: Int = Int.MAX_VALUE

An optional maximum number of lines for the text to span, wrapping if necessary. If the text exceeds the given number of lines, it will be truncated according to overflow and softWrap. It is required that 1 <= minLines<= maxLines.

minLines: Int = 1

The minimum height in terms of minimum number of visible lines. It is required that 1 <= minLines<= maxLines.

onTextLayout: ((TextLayoutResult) -> Unit)? = null

Callback that is executed when a new text layout is calculated. A TextLayoutResult object that callback provides contains paragraph information, size of the text, baselines and other details. The callback can be used to add additional decoration or functionality to the text. For example, to draw selection around the text.

style: TextStyle = LocalTextStyle.current

Style configuration for the text such as color, font, line height etc.

@Composable
fun Text(
    text: AnnotatedString,
    modifier: Modifier = Modifier,
    color: Color = Color.Unspecified,
    fontSize: TextUnit = TextUnit.Unspecified,
    fontStyle: FontStyle? = null,
    fontWeight: FontWeight? = null,
    fontFamily: FontFamily? = null,
    letterSpacing: TextUnit = TextUnit.Unspecified,
    textDecoration: TextDecoration? = null,
    textAlign: TextAlign? = null,
    lineHeight: TextUnit = TextUnit.Unspecified,
    overflow: TextOverflow = TextOverflow.Clip,
    softWrap: Boolean = true,
    maxLines: Int = Int.MAX_VALUE,
    minLines: Int = 1,
    inlineContent: Map<StringInlineTextContent> = mapOf(),
    onTextLayout: (TextLayoutResult) -> Unit = {},
    style: TextStyle = LocalTextStyle.current
): Unit

High level element that displays text and provides semantics / accessibility information.

The default style uses the LocalTextStyle provided by the MaterialTheme / components. If you are setting your own style, you may want to consider first retrieving LocalTextStyle, and using TextStyle.copy to keep any theme defined attributes, only modifying the specific attributes you want to override.

For ease of use, commonly used parameters from TextStyle are also present here. The order of precedence is as follows:

  • If a parameter is explicitly set here (i.e, it is not null or TextUnit.Unspecified), then this parameter will always be used.

  • If a parameter is not set, (null or TextUnit.Unspecified), then the corresponding value from style will be used instead.

Additionally, for color, if color is not set, and style does not have a color, then LocalContentColor will be used with an alpha of LocalContentAlpha- this allows this Text or element containing this Text to adapt to different background colors and still maintain contrast and accessibility.

Parameters
text: AnnotatedString

The text to be displayed.

modifier: Modifier = Modifier

Modifier to apply to this layout node.

color: Color = Color.Unspecified

Color to apply to the text. If Color.Unspecified, and style has no color set, this will be LocalContentColor.

fontSize: TextUnit = TextUnit.Unspecified

The size of glyphs to use when painting the text. See TextStyle.fontSize.

fontStyle: FontStyle? = null

The typeface variant to use when drawing the letters (e.g., italic). See TextStyle.fontStyle.

fontWeight: FontWeight? = null

The typeface thickness to use when painting the text (e.g., FontWeight.Bold).

fontFamily: FontFamily? = null

The font family to be used when rendering the text. See TextStyle.fontFamily.

letterSpacing: TextUnit = TextUnit.Unspecified

The amount of space to add between each letter. See TextStyle.letterSpacing.

textDecoration: TextDecoration? = null

The decorations to paint on the text (e.g., an underline). See TextStyle.textDecoration.

textAlign: TextAlign? = null

The alignment of the text within the lines of the paragraph. See TextStyle.textAlign.

lineHeight: TextUnit = TextUnit.Unspecified

Line height for the Paragraph in TextUnit unit, e.g. SP or EM. See TextStyle.lineHeight.

overflow: TextOverflow = TextOverflow.Clip

How visual overflow should be handled.

softWrap: Boolean = true

Whether the text should break at soft line breaks. If false, the glyphs in the text will be positioned as if there was unlimited horizontal space. If softWrap is false, overflow and TextAlign may have unexpected effects.

maxLines: Int = Int.MAX_VALUE

An optional maximum number of lines for the text to span, wrapping if necessary. If the text exceeds the given number of lines, it will be truncated according to overflow and softWrap. It is required that 1 <= minLines<= maxLines.

minLines: Int = 1

The minimum height in terms of minimum number of visible lines. It is required that 1 <= minLines<= maxLines.

inlineContent: Map<StringInlineTextContent> = mapOf()

A map store composables that replaces certain ranges of the text. It's used to insert composables into text layout. Check InlineTextContent for more information.

onTextLayout: (TextLayoutResult) -> Unit = {}

Callback that is executed when a new text layout is calculated. A TextLayoutResult object that callback provides contains paragraph information, size of the text, baselines and other details. The callback can be used to add additional decoration or functionality to the text. For example, to draw selection around the text.

style: TextStyle = LocalTextStyle.current

Style configuration for the text such as color, font, line height etc.

TextButton

@Composable
@NonRestartableComposable
fun TextButton(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    elevation: ButtonElevation? = null,
    shape: Shape = MaterialTheme.shapes.small,
    border: BorderStroke? = null,
    colors: ButtonColors = ButtonDefaults.textButtonColors(),
    contentPadding: PaddingValues = ButtonDefaults.TextButtonContentPadding,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design text button.

Text buttons are typically used for less-pronounced actions, including those located in dialogs and cards. In cards, text buttons help maintain an emphasis on card content.

Text button image

The default text style for internal Text components will be set to Typography.button.

import androidx.compose.material.Text
import androidx.compose.material.TextButton

TextButton(onClick = { /* Do something! */ }) {
    Text("Text Button")
}
Parameters
onClick: () -> Unit

Will be called when the user clicks the button

modifier: Modifier = Modifier

Modifier to be applied to the button

enabled: Boolean = true

Controls the enabled state of the button. When false, this button will not be clickable

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this button. You can use this to change the button's appearance or preview the button in different states. Note that if null is provided, interactions will still happen internally.

elevation: ButtonElevation? = null

ButtonElevation used to resolve the elevation for this button in different states. A TextButton typically has no elevation, see Button for a button with elevation.

shape: Shape = MaterialTheme.shapes.small

Defines the button's shape as well as its shadow

border: BorderStroke? = null

Border to draw around the button

colors: ButtonColors = ButtonDefaults.textButtonColors()

ButtonColors that will be used to resolve the background and content color for this button in different states. See ButtonDefaults.textButtonColors.

contentPadding: PaddingValues = ButtonDefaults.TextButtonContentPadding

The spacing values to apply internally between the container and the content

TextField

@Composable
fun TextField(
    value: String,
    onValueChange: (String) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    readOnly: Boolean = false,
    textStyle: TextStyle = LocalTextStyle.current,
    label: (@Composable () -> Unit)? = null,
    placeholder: (@Composable () -> Unit)? = null,
    leadingIcon: (@Composable () -> Unit)? = null,
    trailingIcon: (@Composable () -> Unit)? = null,
    isError: Boolean = false,
    visualTransformation: VisualTransformation = VisualTransformation.None,
    keyboardOptions: KeyboardOptions = KeyboardOptions.Default,
    keyboardActions: KeyboardActions = KeyboardActions(),
    singleLine: Boolean = false,
    maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE,
    minLines: Int = 1,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = MaterialTheme.shapes.small.copy(bottomEnd = ZeroCornerSize, bottomStart = ZeroCornerSize),
    colors: TextFieldColors = TextFieldDefaults.textFieldColors()
): Unit

Material Design filled text field.

Filled text fields have more visual emphasis than outlined text fields, making them stand out when surrounded by other content and components.

Filled text field image

If you are looking for an outlined version, see OutlinedTextField.

A simple single line text field looks like:

import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable

var text by rememberSaveable { mutableStateOf("") }

TextField(
    value = text,
    onValueChange = { text = it },
    label = { Text("Label") },
    singleLine = true
)

You may provide a placeholder:

import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable

var text by rememberSaveable { mutableStateOf("") }

TextField(
    value = text,
    onValueChange = { text = it },
    label = { Text("Email") },
    placeholder = { Text("example@gmail.com") }
)

You can also provide leading and trailing icons:

import androidx.compose.material.Icon
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable

var text by rememberSaveable { mutableStateOf("") }

TextField(
    value = text,
    onValueChange = { text = it },
    placeholder = { Text("placeholder") },
    leadingIcon = { Icon(Icons.Filled.Favorite, contentDescription = "Localized description") },
    trailingIcon = { Icon(Icons.Filled.Info, contentDescription = "Localized description") }
)

To handle the error input state, use isError parameter:

import androidx.compose.foundation.text.KeyboardActions
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.ui.semantics.error
import androidx.compose.ui.semantics.semantics

var text by rememberSaveable { mutableStateOf("") }
var isError by rememberSaveable { mutableStateOf(false) }

fun validate(text: String) {
    isError = text.count() < 5
}

TextField(
    value = text,
    onValueChange = {
        text = it
        isError = false
    },
    singleLine = true,
    label = { Text(if (isError) "Email*" else "Email") },
    isError = isError,
    keyboardActions = KeyboardActions { validate(text) },
    modifier = Modifier.semantics {
        // Provide localized description of the error
        if (isError) error("Email format is invalid.")
    }
)

Additionally, you may provide additional message at the bottom:

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.padding
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable

var text by rememberSaveable { mutableStateOf("") }

Column {
    TextField(
        value = text,
        onValueChange = { text = it },
        label = { Text("Label") }
    )
    Text(
        text = "Helper message",
        color = MaterialTheme.colors.onSurface.copy(alpha = ContentAlpha.medium),
        style = MaterialTheme.typography.caption,
        modifier = Modifier.padding(start = 16.dp)
    )
}

Password text field example:

import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.ui.text.input.PasswordVisualTransformation

var password by rememberSaveable { mutableStateOf("") }
var passwordHidden by rememberSaveable { mutableStateOf(true) }
TextField(
    value = password,
    onValueChange = { password = it },
    singleLine = true,
    label = { Text("Enter password") },
    visualTransformation =
    if (passwordHidden) PasswordVisualTransformation() else VisualTransformation.None,
    keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
    trailingIcon = {
        IconButton(onClick = { passwordHidden = !passwordHidden }) {
            val visibilityIcon =
                if (passwordHidden) Icons.Filled.Visibility else Icons.Filled.VisibilityOff
            // Please provide localized description for accessibility services
            val description = if (passwordHidden) "Show password" else "Hide password"
            Icon(imageVector = visibilityIcon, contentDescription = description)
        }
    }
)

Hiding a software keyboard on IME action performed:

import androidx.compose.foundation.text.KeyboardActions
import androidx.compose.foundation.text.KeyboardOptions
import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable

val keyboardController = LocalSoftwareKeyboardController.current
var text by rememberSaveable { mutableStateOf("") }
TextField(
    value = text,
    onValueChange = { text = it },
    label = { Text("Label") },
    keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
    keyboardActions = KeyboardActions(
        onDone = {
            keyboardController?.hide()
            // do something here
        }
    )
)

If apart from input text change you also want to observe the cursor location, selection range, or IME composition use the TextField overload with the TextFieldValue parameter instead.

Parameters
value: String

the input text to be shown in the text field

onValueChange: (String) -> Unit

the callback that is triggered when the input service updates the text. An updated text comes as a parameter of the callback

modifier: Modifier = Modifier

a Modifier for this text field

enabled: Boolean = true

controls the enabled state of the TextField. When false, the text field will be neither editable nor focusable, the input of the text field will not be selectable, visually text field will appear in the disabled UI state

readOnly: Boolean = false

controls the editable state of the TextField. When true, the text field can not be modified, however, a user can focus it and copy text from it. Read-only text fields are usually used to display pre-filled forms that user can not edit

textStyle: TextStyle = LocalTextStyle.current

the style to be applied to the input text. The default textStyle uses the LocalTextStyle defined by the theme

label: (@Composable () -> Unit)? = null

the optional label to be displayed inside the text field container. The default text style for internal Text is Typography.caption when the text field is in focus and Typography.subtitle1 when the text field is not in focus

placeholder: (@Composable () -> Unit)? = null

the optional placeholder to be displayed when the text field is in focus and the input text is empty. The default text style for internal Text is Typography.subtitle1

leadingIcon: (@Composable () -> Unit)? = null

the optional leading icon to be displayed at the beginning of the text field container

trailingIcon: (@Composable () -> Unit)? = null

the optional trailing icon to be displayed at the end of the text field container

isError: Boolean = false

indicates if the text field's current value is in error. If set to true, the label, bottom indicator and trailing icon by default will be displayed in error color

visualTransformation: VisualTransformation = VisualTransformation.None

transforms the visual representation of the input value For example, you can use PasswordVisualTransformation to create a password text field. By default no visual transformation is applied

keyboardOptions: KeyboardOptions = KeyboardOptions.Default

software keyboard options that contains configuration such as KeyboardType and ImeAction.

keyboardActions: KeyboardActions = KeyboardActions()

when the input service emits an IME action, the corresponding callback is called. Note that this IME action may be different from what you specified in KeyboardOptions.imeAction.

singleLine: Boolean = false

when set to true, this text field becomes a single horizontally scrolling text field instead of wrapping onto multiple lines. The keyboard will be informed to not show the return key as the ImeAction. Note that maxLines parameter will be ignored as the maxLines attribute will be automatically set to 1.

maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE

the maximum height in terms of maximum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

minLines: Int = 1

the minimum height in terms of minimum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this text field. You can use this to change the text field's appearance or preview the text field in different states. Note that if null is provided, interactions will still happen internally.

shape: Shape = MaterialTheme.shapes.small.copy(bottomEnd = ZeroCornerSize, bottomStart = ZeroCornerSize)

the shape of the text field's container

colors: TextFieldColors = TextFieldDefaults.textFieldColors()

TextFieldColors that will be used to resolve color of the text, content (including label, placeholder, leading and trailing icons, indicator line) and background for this text field in different states. See TextFieldDefaults.textFieldColors

TextField

@Composable
fun TextField(
    value: TextFieldValue,
    onValueChange: (TextFieldValue) -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    readOnly: Boolean = false,
    textStyle: TextStyle = LocalTextStyle.current,
    label: (@Composable () -> Unit)? = null,
    placeholder: (@Composable () -> Unit)? = null,
    leadingIcon: (@Composable () -> Unit)? = null,
    trailingIcon: (@Composable () -> Unit)? = null,
    isError: Boolean = false,
    visualTransformation: VisualTransformation = VisualTransformation.None,
    keyboardOptions: KeyboardOptions = KeyboardOptions.Default,
    keyboardActions: KeyboardActions = KeyboardActions(),
    singleLine: Boolean = false,
    maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE,
    minLines: Int = 1,
    interactionSource: MutableInteractionSource? = null,
    shape: Shape = TextFieldDefaults.TextFieldShape,
    colors: TextFieldColors = TextFieldDefaults.textFieldColors()
): Unit

Material Design filled text field.

Filled text fields have more visual emphasis than outlined text fields, making them stand out when surrounded by other content and components.

Filled text field image

If you are looking for an outlined version, see OutlinedTextField.

See example usage:

import androidx.compose.material.Text
import androidx.compose.material.TextField
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.saveable.rememberSaveable
import androidx.compose.ui.text.TextRange
import androidx.compose.ui.text.input.TextFieldValue

var text by rememberSaveable(stateSaver = TextFieldValue.Saver) {
    mutableStateOf(TextFieldValue("example", TextRange(0, 7)))
}

TextField(
    value = text,
    onValueChange = { text = it },
    label = { Text("Label") }
)

This overload provides access to the input text, cursor position, selection range and IME composition. If you only want to observe an input text change, use the TextField overload with the String parameter instead.

Parameters
value: TextFieldValue

the input TextFieldValue to be shown in the text field

onValueChange: (TextFieldValue) -> Unit

the callback that is triggered when the input service updates values in TextFieldValue. An updated TextFieldValue comes as a parameter of the callback

modifier: Modifier = Modifier

a Modifier for this text field

enabled: Boolean = true

controls the enabled state of the TextField. When false, the text field will be neither editable nor focusable, the input of the text field will not be selectable, visually text field will appear in the disabled UI state

readOnly: Boolean = false

controls the editable state of the TextField. When true, the text field can not be modified, however, a user can focus it and copy text from it. Read-only text fields are usually used to display pre-filled forms that user can not edit

textStyle: TextStyle = LocalTextStyle.current

the style to be applied to the input text. The default textStyle uses the LocalTextStyle defined by the theme

label: (@Composable () -> Unit)? = null

the optional label to be displayed inside the text field container. The default text style for internal Text is Typography.caption when the text field is in focus and Typography.subtitle1 when the text field is not in focus

placeholder: (@Composable () -> Unit)? = null

the optional placeholder to be displayed when the text field is in focus and the input text is empty. The default text style for internal Text is Typography.subtitle1

leadingIcon: (@Composable () -> Unit)? = null

the optional leading icon to be displayed at the beginning of the text field container

trailingIcon: (@Composable () -> Unit)? = null

the optional trailing icon to be displayed at the end of the text field container

isError: Boolean = false

indicates if the text field's current value is in error state. If set to true, the label, bottom indicator and trailing icon by default will be displayed in error color

visualTransformation: VisualTransformation = VisualTransformation.None

transforms the visual representation of the input value. For example, you can use PasswordVisualTransformation to create a password text field. By default no visual transformation is applied

keyboardOptions: KeyboardOptions = KeyboardOptions.Default

software keyboard options that contains configuration such as KeyboardType and ImeAction.

keyboardActions: KeyboardActions = KeyboardActions()

when the input service emits an IME action, the corresponding callback is called. Note that this IME action may be different from what you specified in KeyboardOptions.imeAction.

singleLine: Boolean = false

when set to true, this text field becomes a single horizontally scrolling text field instead of wrapping onto multiple lines. The keyboard will be informed to not show the return key as the ImeAction. Note that maxLines parameter will be ignored as the maxLines attribute will be automatically set to 1.

maxLines: Int = if (singleLine) 1 else Int.MAX_VALUE

the maximum height in terms of maximum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

minLines: Int = 1

the minimum height in terms of minimum number of visible lines. It is required that 1 <= minLines<= maxLines. This parameter is ignored when singleLine is true.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this text field. You can use this to change the text field's appearance or preview the text field in different states. Note that if null is provided, interactions will still happen internally.

shape: Shape = TextFieldDefaults.TextFieldShape

the shape of the text field's container

colors: TextFieldColors = TextFieldDefaults.textFieldColors()

TextFieldColors that will be used to resolve color of the text, content (including label, placeholder, leading and trailing icons, indicator line) and background for this text field in different states. See TextFieldDefaults.textFieldColors

@Composable
fun TopAppBar(
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = AppBarDefaults.TopAppBarElevation,
    contentPadding: PaddingValues = AppBarDefaults.ContentPadding,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design top app bar.

The top app bar displays information and actions relating to the current screen.

App bars: top image

This TopAppBar has no pre-defined slots for content, allowing you to customize the layout of content inside. See the other TopAppBar overload for a TopAppBar that has opinionated slots for title, navigation icon, and trailing actions.

The LocalContentAlpha inside this TopAppBar is ContentAlpha.medium - this is the default for trailing and overflow icons. It is recommended that any text, and leading icons at the start of the TopAppBar use ContentAlpha.high instead.

Parameters
modifier: Modifier = Modifier

The Modifier to be applied to this TopAppBar

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the TopAppBar. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this TopAppBar to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this TopAppBar.

elevation: Dp = AppBarDefaults.TopAppBarElevation

the elevation of this TopAppBar.

contentPadding: PaddingValues = AppBarDefaults.ContentPadding

the padding applied to the content of this TopAppBar

content: @Composable RowScope.() -> Unit

the content of this TopAppBar.The default layout here is a Row, so content inside will be placed horizontally.

@Composable
fun TopAppBar(
    title: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    navigationIcon: (@Composable () -> Unit)? = null,
    actions: @Composable RowScope.() -> Unit = {},
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = AppBarDefaults.TopAppBarElevation
): Unit

Material Design top app bar.

The top app bar displays information and actions relating to the current screen.

App bars: top image

This TopAppBar has slots for a title, navigation icon, and actions. Note that the title slot is inset from the start according to spec - for custom use cases such as horizontally centering the title, use the other TopAppBar overload for a generic TopAppBar with no restriction on content.

import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar

TopAppBar(
    windowInsets = AppBarDefaults.topAppBarWindowInsets,
    title = { Text("Simple TopAppBar") },
    navigationIcon = {
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Menu, contentDescription = null)
        }
    },
    actions = {
        // RowScope here, so these icons will be placed horizontally
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
        }
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
        }
    }
)
Parameters
title: @Composable () -> Unit

The title to be displayed in the center of the TopAppBar

modifier: Modifier = Modifier

The Modifier to be applied to this TopAppBar

navigationIcon: (@Composable () -> Unit)? = null

The navigation icon displayed at the start of the TopAppBar. This should typically be an IconButton or IconToggleButton.

actions: @Composable RowScope.() -> Unit = {}

The actions displayed at the end of the TopAppBar. This should typically be IconButtons. The default layout here is a Row, so icons inside will be placed horizontally.

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the TopAppBar. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this TopAppBar to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this TopAppBar.

elevation: Dp = AppBarDefaults.TopAppBarElevation

the elevation of this TopAppBar.

@Composable
fun TopAppBar(
    windowInsets: WindowInsets,
    modifier: Modifier = Modifier,
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = AppBarDefaults.TopAppBarElevation,
    contentPadding: PaddingValues = AppBarDefaults.ContentPadding,
    content: @Composable RowScope.() -> Unit
): Unit

Material Design top app bar.

The top app bar displays information and actions relating to the current screen.

App bars: top image

This particular overload provides ability to specify WindowInsets. Recommended value can be found in AppBarDefaults.topAppBarWindowInsets.

This TopAppBar has no pre-defined slots for content, allowing you to customize the layout of content inside. See the other TopAppBar overload for a TopAppBar that has opinionated slots for title, navigation icon, and trailing actions.

The LocalContentAlpha inside this TopAppBar is ContentAlpha.medium - this is the default for trailing and overflow icons. It is recommended that any text, and leading icons at the start of the TopAppBar use ContentAlpha.high instead.

Parameters
windowInsets: WindowInsets

a window insets that app bar will respect.

modifier: Modifier = Modifier

The Modifier to be applied to this TopAppBar

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the TopAppBar. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this TopAppBar to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this TopAppBar.

elevation: Dp = AppBarDefaults.TopAppBarElevation

the elevation of this TopAppBar.

contentPadding: PaddingValues = AppBarDefaults.ContentPadding

the padding applied to the content of this TopAppBar

content: @Composable RowScope.() -> Unit

the content of this TopAppBar.The default layout here is a Row, so content inside will be placed horizontally.

@Composable
fun TopAppBar(
    title: @Composable () -> Unit,
    windowInsets: WindowInsets,
    modifier: Modifier = Modifier,
    navigationIcon: (@Composable () -> Unit)? = null,
    actions: @Composable RowScope.() -> Unit = {},
    backgroundColor: Color = MaterialTheme.colors.primarySurface,
    contentColor: Color = contentColorFor(backgroundColor),
    elevation: Dp = AppBarDefaults.TopAppBarElevation
): Unit

Material Design top app bar.

The top app bar displays information and actions relating to the current screen.

App bars: top image

This particular overload provides ability to specify WindowInsets. Recommended value can be found in AppBarDefaults.topAppBarWindowInsets.

This TopAppBar has slots for a title, navigation icon, and actions. Note that the title slot is inset from the start according to spec - for custom use cases such as horizontally centering the title, use the other TopAppBar overload for a generic TopAppBar with no restriction on content.

import androidx.compose.material.Icon
import androidx.compose.material.IconButton
import androidx.compose.material.Text
import androidx.compose.material.TopAppBar

TopAppBar(
    windowInsets = AppBarDefaults.topAppBarWindowInsets,
    title = { Text("Simple TopAppBar") },
    navigationIcon = {
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Menu, contentDescription = null)
        }
    },
    actions = {
        // RowScope here, so these icons will be placed horizontally
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
        }
        IconButton(onClick = { /* doSomething() */ }) {
            Icon(Icons.Filled.Favorite, contentDescription = "Localized description")
        }
    }
)
Parameters
title: @Composable () -> Unit

The title to be displayed in the center of the TopAppBar

windowInsets: WindowInsets

a window insets that app bar will respect.

modifier: Modifier = Modifier

The Modifier to be applied to this TopAppBar

navigationIcon: (@Composable () -> Unit)? = null

The navigation icon displayed at the start of the TopAppBar. This should typically be an IconButton or IconToggleButton.

actions: @Composable RowScope.() -> Unit = {}

The actions displayed at the end of the TopAppBar. This should typically be IconButtons. The default layout here is a Row, so icons inside will be placed horizontally.

backgroundColor: Color = MaterialTheme.colors.primarySurface

The background color for the TopAppBar. Use Color.Transparent to have no color.

contentColor: Color = contentColorFor(backgroundColor)

The preferred content color provided by this TopAppBar to its children. Defaults to either the matching content color for backgroundColor, or if backgroundColor is not a color from the theme, this will keep the same value set above this TopAppBar.

elevation: Dp = AppBarDefaults.TopAppBarElevation

the elevation of this TopAppBar.

TriStateCheckbox

@Composable
fun TriStateCheckbox(
    state: ToggleableState,
    onClick: (() -> Unit)?,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    colors: CheckboxColors = CheckboxDefaults.colors()
): Unit

Material Design checkbox parent.

Checkboxes can have a parent-child relationship with other checkboxes. When the parent checkbox is checked, all child checkboxes are checked. If a parent checkbox is unchecked, all child checkboxes are unchecked. If some, but not all, child checkboxes are checked, the parent checkbox becomes an indeterminate checkbox.

Checkboxes image

import androidx.compose.foundation.layout.Column
import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.material.Checkbox
import androidx.compose.material.TriStateCheckbox
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember

Column {
    // define dependent checkboxes states
    val (state, onStateChange) = remember { mutableStateOf(true) }
    val (state2, onStateChange2) = remember { mutableStateOf(true) }

    // TriStateCheckbox state reflects state of dependent checkboxes
    val parentState = remember(state, state2) {
        if (state && state2) ToggleableState.On
        else if (!state && !state2) ToggleableState.Off
        else ToggleableState.Indeterminate
    }
    // click on TriStateCheckbox can set state for dependent checkboxes
    val onParentClick = {
        val s = parentState != ToggleableState.On
        onStateChange(s)
        onStateChange2(s)
    }

    TriStateCheckbox(
        state = parentState,
        onClick = onParentClick,
        colors = CheckboxDefaults.colors(
            checkedColor = MaterialTheme.colors.primary
        )
    )
    Spacer(Modifier.size(25.dp))
    Column(Modifier.padding(10.dp, 0.dp, 0.dp, 0.dp)) {
        Checkbox(state, onStateChange)
        Spacer(Modifier.size(25.dp))
        Checkbox(state2, onStateChange2)
    }
}
Parameters
state: ToggleableState

whether TriStateCheckbox is checked, unchecked or in indeterminate state

onClick: (() -> Unit)?

callback to be invoked when checkbox is being clicked, therefore the change of ToggleableState state is requested. If null, then this is passive and relies entirely on a higher-level component to control the state.

modifier: Modifier = Modifier

Modifier to be applied to the layout of the checkbox

enabled: Boolean = true

whether the component is enabled or grayed out

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this checkbox. You can use this to change the checkbox's appearance or preview the checkbox in different states. Note that if null is provided, interactions will still happen internally.

colors: CheckboxColors = CheckboxDefaults.colors()

CheckboxColors that will be used to determine the color of the checkmark / box / border in different states. See CheckboxDefaults.colors.

See also
Checkbox

if you want a simple component that represents Boolean state

contentColorFor

@Composable
fun contentColorFor(backgroundColor: Color): Color

The Material color system contains pairs of colors that are typically used for the background and content color inside a component. For example, a Button typically uses primary for its background, and onPrimary for the color of its content (usually text or iconography).

This function tries to match the provided backgroundColor to a 'background' color in this Colors, and then will return the corresponding color used for content. For example, when backgroundColor is Colors.primary, this will return Colors.onPrimary.

If backgroundColor does not match a background color in the theme, this will return the current value of LocalContentColor as a best-effort color.

Returns
Color

the matching content color for backgroundColor. If backgroundColor is not present in the theme's Colors, then returns the current value of LocalContentColor.

See also
contentColorFor
fun darkColors(
    primary: Color = Color(0xFFBB86FC),
    primaryVariant: Color = Color(0xFF3700B3),
    secondary: Color = Color(0xFF03DAC6),
    secondaryVariant: Color = secondary,
    background: Color = Color(0xFF121212),
    surface: Color = Color(0xFF121212),
    error: Color = Color(0xFFCF6679),
    onPrimary: Color = Color.Black,
    onSecondary: Color = Color.Black,
    onBackground: Color = Color.White,
    onSurface: Color = Color.White,
    onError: Color = Color.Black
): Colors

Creates a complete color definition for the Material color specification using the default dark theme values.

Note: secondaryVariant is typically the same as secondary in dark theme since contrast levels are higher, and hence there is less need for a separate secondary color.

See also
lightColors
fun lightColors(
    primary: Color = Color(0xFF6200EE),
    primaryVariant: Color = Color(0xFF3700B3),
    secondary: Color = Color(0xFF03DAC6),
    secondaryVariant: Color = Color(0xFF018786),
    background: Color = Color.White,
    surface: Color = Color.White,
    error: Color = Color(0xFFB00020),
    onPrimary: Color = Color.White,
    onSecondary: Color = Color.Black,
    onBackground: Color = Color.Black,
    onSurface: Color = Color.Black,
    onError: Color = Color.White
): Colors

Creates a complete color definition for the Material color specification using the default light theme values.

See also
darkColors

rememberBackdropScaffoldState

@Composable
fun rememberBackdropScaffoldState(
    initialValue: BackdropValue,
    animationSpec: AnimationSpec<Float> = BackdropScaffoldDefaults.AnimationSpec,
    confirmStateChange: (BackdropValue) -> Boolean = { true },
    snackbarHostState: SnackbarHostState = remember { SnackbarHostState() }
): BackdropScaffoldState

Create and remember a BackdropScaffoldState.

Parameters
initialValue: BackdropValue

The initial value of the state.

animationSpec: AnimationSpec<Float> = BackdropScaffoldDefaults.AnimationSpec

The default animation that will be used to animate to a new state.

confirmStateChange: (BackdropValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

snackbarHostState: SnackbarHostState = remember { SnackbarHostState() }

The SnackbarHostState used to show snackbars inside the scaffold.

rememberBottomDrawerState

@Composable
fun rememberBottomDrawerState(
    initialValue: BottomDrawerValue,
    confirmStateChange: (BottomDrawerValue) -> Boolean = { true },
    animationSpec: AnimationSpec<Float> = AnimationSpec
): BottomDrawerState

Create and remember a BottomDrawerState.

Parameters
initialValue: BottomDrawerValue

The initial value of the state.

confirmStateChange: (BottomDrawerValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

animationSpec: AnimationSpec<Float> = AnimationSpec

The animation spec to be used for animations.

rememberBottomSheetScaffoldState

@Composable
fun rememberBottomSheetScaffoldState(
    bottomSheetState: BottomSheetState = rememberBottomSheetState(Collapsed),
    snackbarHostState: SnackbarHostState = remember { SnackbarHostState() }
): BottomSheetScaffoldState

Create and remember a BottomSheetScaffoldState.

Parameters
bottomSheetState: BottomSheetState = rememberBottomSheetState(Collapsed)

The state of the persistent bottom sheet.

snackbarHostState: SnackbarHostState = remember { SnackbarHostState() }

The SnackbarHostState used to show snackbars inside the scaffold.

rememberBottomSheetState

@Composable
fun rememberBottomSheetState(
    initialValue: BottomSheetValue,
    animationSpec: AnimationSpec<Float> = BottomSheetScaffoldDefaults.AnimationSpec,
    confirmStateChange: (BottomSheetValue) -> Boolean = { true }
): BottomSheetState

Create a BottomSheetState and remember it.

Parameters
initialValue: BottomSheetValue

The initial value of the state.

animationSpec: AnimationSpec<Float> = BottomSheetScaffoldDefaults.AnimationSpec

The default animation that will be used to animate to a new state.

confirmStateChange: (BottomSheetValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

rememberDismissState

@Composable
@ExperimentalMaterialApi
fun rememberDismissState(
    initialValue: DismissValue = Default,
    confirmStateChange: (DismissValue) -> Boolean = { true }
): DismissState

Create and remember a DismissState.

Parameters
initialValue: DismissValue = Default

The initial value of the state.

confirmStateChange: (DismissValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

rememberDrawerState

@Composable
fun rememberDrawerState(
    initialValue: DrawerValue,
    confirmStateChange: (DrawerValue) -> Boolean = { true }
): DrawerState

Create and remember a DrawerState.

Parameters
initialValue: DrawerValue

The initial value of the state.

confirmStateChange: (DrawerValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

rememberModalBottomSheetState

@Composable
fun rememberModalBottomSheetState(
    initialValue: ModalBottomSheetValue,
    animationSpec: AnimationSpec<Float> = ModalBottomSheetDefaults.AnimationSpec,
    confirmValueChange: (ModalBottomSheetValue) -> Boolean = { true },
    skipHalfExpanded: Boolean = false
): ModalBottomSheetState

Create a ModalBottomSheetState and remember it.

Parameters
initialValue: ModalBottomSheetValue

The initial value of the state.

animationSpec: AnimationSpec<Float> = ModalBottomSheetDefaults.AnimationSpec

The default animation that will be used to animate to a new state.

confirmValueChange: (ModalBottomSheetValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

skipHalfExpanded: Boolean = false

Whether the half expanded state, if the sheet is tall enough, should be skipped. If true, the sheet will always expand to the Expanded state and move to the Hidden state when hiding the sheet, either programmatically or by user interaction. Must not be set to true if the initialValue is ModalBottomSheetValue.HalfExpanded. If supplied with ModalBottomSheetValue.HalfExpanded for the initialValue, an IllegalArgumentException will be thrown.

rememberScaffoldState

@Composable
fun rememberScaffoldState(
    drawerState: DrawerState = rememberDrawerState(DrawerValue.Closed),
    snackbarHostState: SnackbarHostState = remember { SnackbarHostState() }
): ScaffoldState

Creates a ScaffoldState with the default animation clock and memoizes it.

Parameters
drawerState: DrawerState = rememberDrawerState(DrawerValue.Closed)

the drawer state

snackbarHostState: SnackbarHostState = remember { SnackbarHostState() }

instance of SnackbarHostState to be used to show Snackbars inside of the Scaffold

rememberSwipeableState

@Composable
@ExperimentalMaterialApi
fun <T : Any> rememberSwipeableState(
    initialValue: T,
    animationSpec: AnimationSpec<Float> = AnimationSpec,
    confirmStateChange: (newValue) -> Boolean = { true }
): SwipeableState<T>

Create and remember a SwipeableState with the default animation clock.

Parameters
initialValue: T

The initial value of the state.

animationSpec: AnimationSpec<Float> = AnimationSpec

The default animation that will be used to animate to a new state.

confirmStateChange: (newValue) -> Boolean = { true }

Optional callback invoked to confirm or veto a pending state change.

fun ripple(
    bounded: Boolean = true,
    radius: Dp = Dp.Unspecified,
    color: Color = Color.Unspecified
): IndicationNodeFactory

Creates a Ripple using the provided values and values inferred from the theme.

A Ripple is a Material implementation of Indication that expresses different Interactions by drawing ripple animations and state layers.

A Ripple responds to PressInteraction.Press by starting a new animation, and responds to other Interactions by showing a fixed state layer with varying alpha values depending on the Interaction.

MaterialTheme provides Ripples using androidx.compose.foundation.LocalIndication, so a Ripple will be used as the default Indication inside components such as androidx.compose.foundation.clickable and androidx.compose.foundation.indication, in addition to Material provided components that use a Ripple as well.

You can also explicitly create a Ripple and provide it to custom components in order to change the parameters from the default, such as to create an unbounded ripple with a fixed size.

To create a Ripple with a manually defined color that can change over time, see the other ripple overload with a ColorProducer parameter. This will avoid unnecessary recompositions when changing the color, and preserve existing ripple state when the color changes.

Parameters
bounded: Boolean = true

If true, ripples are clipped by the bounds of the target layout. Unbounded ripples always animate from the target layout center, bounded ripples animate from the touch position.

radius: Dp = Dp.Unspecified

the radius for the ripple. If Dp.Unspecified is provided then the size will be calculated based on the target layout size.

color: Color = Color.Unspecified

the color of the ripple. This color is usually the same color used by the text or iconography in the component. This color will then have RippleDefaults.rippleAlpha applied to calculate the final color used to draw the ripple. If Color.Unspecified is provided the color used will be RippleDefaults.rippleColor instead.

fun ripple(
    color: ColorProducer,
    bounded: Boolean = true,
    radius: Dp = Dp.Unspecified
): IndicationNodeFactory

Creates a Ripple using the provided values and values inferred from the theme.

A Ripple is a Material implementation of Indication that expresses different Interactions by drawing ripple animations and state layers.

A Ripple responds to PressInteraction.Press by starting a new ripple animation, and responds to other Interactions by showing a fixed state layer with varying alpha values depending on the Interaction.

MaterialTheme provides Ripples using androidx.compose.foundation.LocalIndication, so a Ripple will be used as the default Indication inside components such as androidx.compose.foundation.clickable and androidx.compose.foundation.indication, in addition to Material provided components that use a Ripple as well.

You can also explicitly create a Ripple and provide it to custom components in order to change the parameters from the default, such as to create an unbounded ripple with a fixed size.

To create a Ripple with a static color, see the ripple overload with a Color parameter. This overload is optimized for Ripples that have dynamic colors that change over time, to reduce unnecessary recompositions.

Parameters
color: ColorProducer

the color of the ripple. This color is usually the same color used by the text or iconography in the component. This color will then have RippleDefaults.rippleAlpha applied to calculate the final color used to draw the ripple. If you are creating this ColorProducer outside of composition (where it will be automatically remembered), make sure that its instance is stable (such as by remembering the object that holds it), or remember the returned ripple object to make sure that ripple nodes are not being created each recomposition.

bounded: Boolean = true

If true, ripples are clipped by the bounds of the target layout. Unbounded ripples always animate from the target layout center, bounded ripples animate from the touch position.

radius: Dp = Dp.Unspecified

the radius for the ripple. If Dp.Unspecified is provided then the size will be calculated based on the target layout size.

Extension functions

BottomNavigationItem

@Composable
fun RowScope.BottomNavigationItem(
    selected: Boolean,
    onClick: () -> Unit,
    icon: @Composable () -> Unit,
    modifier: Modifier = Modifier,
    enabled: Boolean = true,
    label: (@Composable () -> Unit)? = null,
    alwaysShowLabel: Boolean = true,
    interactionSource: MutableInteractionSource? = null,
    selectedContentColor: Color = LocalContentColor.current,
    unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium)
): Unit

Material Design bottom navigation item.

The recommended configuration for a BottomNavigationItem depends on how many items there are inside a BottomNavigation:

  • Three destinations: Display icons and text labels for all destinations.

  • Four destinations: Active destinations display an icon and text label. Inactive destinations display icons, and text labels are recommended.

  • Five destinations: Active destinations display an icon and text label. Inactive destinations use icons, and use text labels if space permits.

A BottomNavigationItem always shows text labels (if it exists) when selected. Showing text labels if not selected is controlled by alwaysShowLabel.

Parameters
selected: Boolean

whether this item is selected

onClick: () -> Unit

the callback to be invoked when this item is selected

icon: @Composable () -> Unit

icon for this item, typically this will be an Icon

modifier: Modifier = Modifier

optional Modifier for this item

enabled: Boolean = true

controls the enabled state of this item. When false, this item will not be clickable and will appear disabled to accessibility services.

label: (@Composable () -> Unit)? = null

optional text label for this item

alwaysShowLabel: Boolean = true

whether to always show the label for this item. If false, the label will only be shown when this item is selected.

interactionSource: MutableInteractionSource? = null

an optional hoisted MutableInteractionSource for observing and emitting Interactions for this item. You can use this to change the item's appearance or preview the item in different states. Note that if null is provided, interactions will still happen internally.

selectedContentColor: Color = LocalContentColor.current

the color of the text label and icon when this item is selected, and the color of the ripple.

unselectedContentColor: Color = selectedContentColor.copy(alpha = ContentAlpha.medium)

the color of the text label and icon when this item is not selected

contentColorFor

fun Colors.contentColorFor(backgroundColor: Color): Color

The Material color system contains pairs of colors that are typically used for the background and content color inside a component. For example, a Button typically uses primary for its background, and onPrimary for the color of its content (usually text or iconography).

This function tries to match the provided backgroundColor to a 'background' color in this Colors, and then will return the corresponding color used for content. For example, when backgroundColor is Colors.primary, this will return Colors.onPrimary.

If backgroundColor does not match a background color in the theme, this will return Color.Unspecified.

Returns
Color

the matching content color for backgroundColor. If backgroundColor is not present in the theme's Colors, then returns Color.Unspecified.

See also
contentColorFor

minimumInteractiveComponentSize

fun Modifier.minimumInteractiveComponentSize(): Modifier

Reserves at least 48.dp in size to disambiguate touch interactions if the element would measure smaller.

https://m2.material.io/design/usability/accessibility.html#layout-and-typography

This uses the Material recommended minimum size of 48.dp x 48.dp, which may not the same as the system enforced minimum size. The minimum clickable / touch target size (48.dp by default) is controlled by the system via ViewConfiguration` and automatically expanded at the touch input layer.

This modifier is not needed for touch target expansion to happen. It only affects layout, to make sure there is adequate space for touch target expansion.

@ExperimentalMaterialApi
fun <T : Any?> Modifier.swipeable(
    state: SwipeableState<T>,
    anchors: Map<Float, T>,
    orientation: Orientation,
    enabled: Boolean = true,
    reverseDirection: Boolean = false,
    interactionSource: MutableInteractionSource? = null,
    thresholds: (from, to) -> ThresholdConfig = { _, _ -> FixedThreshold(56.dp) },
    resistance: ResistanceConfig? = resistanceConfig(anchors.keys),
    velocityThreshold: Dp = VelocityThreshold
): Modifier

Enable swipe gestures between a set of predefined states.

To use this, you must provide a map of anchors (in pixels) to states (of type T). Note that this map cannot be empty and cannot have two anchors mapped to the same state.

When a swipe is detected, the offset of the SwipeableState will be updated with the swipe delta. You should use this offset to move your content accordingly (see Modifier.offsetPx). When the swipe ends, the offset will be animated to one of the anchors and when that anchor is reached, the value of the SwipeableState will also be updated to the state corresponding to the new anchor. The target anchor is calculated based on the provided positional thresholds.

Swiping is constrained between the minimum and maximum anchors. If the user attempts to swipe past these bounds, a resistance effect will be applied by default. The amount of resistance at each edge is specified by the resistance config. To disable all resistance, set it to null.

For an example of a swipeable with three states, see:

import androidx.compose.foundation.background
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.offset
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.layout.width
import androidx.compose.material.FractionalThreshold
import androidx.compose.material.Text
import androidx.compose.material.rememberSwipeableState
import androidx.compose.material.swipeable
import androidx.compose.ui.unit.IntOffset

// Draw a slider-like composable consisting of a red square moving along a
// black background, with three states: "A" (min), "B" (middle), and "C" (max).
val width = 350.dp
val squareSize = 50.dp

val swipeableState = rememberSwipeableState("A")
val sizePx = with(LocalDensity.current) { (width - squareSize).toPx() }
val anchors = mapOf(0f to "A", sizePx / 2 to "B", sizePx to "C")

Box(
    modifier = Modifier
        .width(width)
        .swipeable(
            state = swipeableState,
            anchors = anchors,
            thresholds = { _, _ -> FractionalThreshold(0.5f) },
            orientation = Orientation.Horizontal
        )
        .background(Color.Black)
) {
    Box(
        Modifier
            .offset { IntOffset(swipeableState.offset.value.roundToInt(), 0) }
            .size(squareSize)
            .background(Color.Red),
        contentAlignment = Alignment.Center
    ) {
        Text(swipeableState.currentValue, color = Color.White, fontSize = 24.sp)
    }
}
Parameters
<T : Any?>

The type of the state.

state: SwipeableState<T>

The state of the swipeable.

anchors: Map<Float, T>

Pairs of anchors and states, used to map anchors to states and vice versa.

orientation: Orientation

The orientation in which the swipeable can be swiped.

enabled: Boolean = true

Whether this swipeable is enabled and should react to the user's input.

reverseDirection: Boolean = false

Whether to reverse the direction of the swipe, so a top to bottom swipe will behave like bottom to top, and a left to right swipe will behave like right to left.

interactionSource: MutableInteractionSource? = null

Optional MutableInteractionSource that will passed on to the internal Modifier.draggable.

thresholds: (from, to) -> ThresholdConfig = { _, _ -> FixedThreshold(56.dp) }

Specifies where the thresholds between the states are. The thresholds will be used to determine which state to animate to when swiping stops. This is represented as a lambda that takes two states and returns the threshold between them in the form of a ThresholdConfig. Note that the order of the states corresponds to the swipe direction.

resistance: ResistanceConfig? = resistanceConfig(anchors.keys)

Controls how much resistance will be applied when swiping past the bounds.

velocityThreshold: Dp = VelocityThreshold

The threshold (in dp per second) that the end velocity has to exceed in order to animate to the next state, even if the positional thresholds have not been reached.

Top-level properties

LocalAbsoluteElevation

val LocalAbsoluteElevationProvidableCompositionLocal<Dp>

CompositionLocal containing the current absolute elevation provided by Surface components. This absolute elevation is a sum of all the previous elevations. Absolute elevation is only used for calculating elevation overlays in dark theme, and is not used for drawing the shadow in a Surface. See ElevationOverlay for more information on elevation overlays.

import androidx.compose.material.Surface

Surface(elevation = 4.dp) {
    // This will equal 4.dp
    val elevation = LocalAbsoluteElevation.current
    Surface(elevation = 2.dp) {
        // This will equal 6.dp (4 + 2)
        val elevation = LocalAbsoluteElevation.current
    }
}

LocalContentAlpha

val LocalContentAlphaProvidableCompositionLocal<Float>

CompositionLocal containing the preferred content alpha for a given position in the hierarchy. This alpha is used for text and iconography (Text and Icon) to emphasize / de-emphasize different parts of a component. See the Material guide on Text Legibility for more information on alpha levels used by text and iconography.

See ContentAlpha for the default levels used by most Material components.

MaterialTheme sets this to ContentAlpha.high by default, as this is the default alpha for body text.

import androidx.compose.foundation.layout.Column
import androidx.compose.material.Text
import androidx.compose.runtime.CompositionLocalProvider

// Note the alpha values listed below are the values for light theme. The values are slightly
// different in dark theme to provide proper contrast against the background.
Column {
    Text(
        "No content alpha applied - uses the default content alpha set by MaterialTheme - " +
            "87% alpha"
    )
    CompositionLocalProvider(LocalContentAlpha provides 1.00f) {
        Text("1.00f alpha applied - 100% alpha")
    }
    CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.high) {
        Text("High content alpha applied - 87% alpha")
    }
    CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.medium) {
        Text("Medium content alpha applied - 60% alpha")
    }
    CompositionLocalProvider(LocalContentAlpha provides ContentAlpha.disabled) {
        Text("Disabled content alpha applied - 38% alpha")
    }
}

LocalContentColor

val LocalContentColorProvidableCompositionLocal<Color>

CompositionLocal containing the preferred content color for a given position in the hierarchy. This typically represents the on color for a color in Colors. For example, if the background color is Colors.surface, this color is typically set to Colors.onSurface.

This color should be used for any typography / iconography, to ensure that the color of these adjusts when the background color changes. For example, on a dark background, text should be light, and on a light background, text should be dark.

Defaults to Color.Black if no color has been explicitly set.

LocalElevationOverlay

val LocalElevationOverlayProvidableCompositionLocal<ElevationOverlay?>

CompositionLocal containing the ElevationOverlay used by Surface components. Provide null to turn off ElevationOverlays for the children within this CompositionLocal..

See also
ElevationOverlay

LocalMinimumInteractiveComponentEnforcement

@ExperimentalMaterialApi
val LocalMinimumInteractiveComponentEnforcementProvidableCompositionLocal<Boolean>

CompositionLocal that configures whether Material components that have a visual size that is lower than the minimum touch target size for accessibility (such as Button) will include extra space outside the component to ensure that they are accessible. If set to false there will be no extra space, and so it is possible that if the component is placed near the edge of a layout / near to another component without any padding, there will not be enough space for an accessible touch target.

LocalMinimumTouchTargetEnforcement

@ExperimentalMaterialApi
val LocalMinimumTouchTargetEnforcementProvidableCompositionLocal<Boolean>

CompositionLocal that configures whether Material components that have a visual size that is lower than the minimum touch target size for accessibility (such as Button) will include extra space outside the component to ensure that they are accessible. If set to false there will be no extra space, and so it is possible that if the component is placed near the edge of a layout / near to another component without any padding, there will not be enough space for an accessible touch target.

LocalRippleConfiguration

@ExperimentalMaterialApi
val LocalRippleConfigurationProvidableCompositionLocal<RippleConfiguration>

CompositionLocal used for providing RippleConfiguration down the tree. This acts as a tree-local 'override' for ripples used inside components that you cannot directly control, such as to change the color of a specific component's ripple, or disable it entirely.

In most cases you should rely on the default theme behavior for consistency with other components

  • this exists as an escape hatch for individual components and is not intended to be used for full theme customization across an application. For this use case you should instead build your own custom ripple that queries your design system theme values directly using createRippleModifierNode.

LocalTextStyle

val LocalTextStyleProvidableCompositionLocal<TextStyle>

CompositionLocal containing the preferred TextStyle that will be used by Text components by default. To set the value for this CompositionLocal, see ProvideTextStyle which will merge any missing TextStyle properties with the existing TextStyle set in this CompositionLocal.

See also
ProvideTextStyle

LocalUseFallbackRippleImplementation

@ExperimentalMaterialApi
val LocalUseFallbackRippleImplementationProvidableCompositionLocal<Boolean>

Temporary CompositionLocal to allow configuring whether the old ripple implementation that uses the deprecated androidx.compose.material.ripple.RippleTheme API should be used in Material components and LocalIndication, instead of the new ripple API. This flag defaults to false, and will be removed after one stable release: it should only be used to temporarily unblock upgrading.

Provide this CompositionLocal before you provide MaterialTheme to make sure it is correctly provided through LocalIndication.

ScaffoldSubcomposeInMeasureFix

@ExperimentalMaterialApi
var ScaffoldSubcomposeInMeasureFixBoolean

Flag indicating if Scaffold should subcompose and measure its children during measurement or during placement. Set this flag to false to keep Scaffold's old measurement behavior (measuring in placement).

This flag will be removed in Compose 1.6.0-beta01. If you encounter any issues with the new behavior, please file an issue at: issuetracker.google.com/issues/new?component=742043

Extension properties

primarySurface

val Colors.primarySurfaceColor

primarySurface represents the background color of components that are Colors.primary in light theme, and Colors.surface in dark theme, such as androidx.compose.material.TabRow and androidx.compose.material.TopAppBar. This is to reduce brightness of large surfaces in dark theme, aiding contrast and readability. See Dark Theme.

Returns
Color

Colors.primary if in light theme, else Colors.surface