MediumFloatingActionButton

Functions summary

Unit
@ExperimentalMaterial3ExpressiveApi
@Composable
MediumFloatingActionButton(
    onClick: () -> Unit,
    modifier: Modifier,
    shape: Shape,
    containerColor: Color,
    contentColor: Color,
    elevation: FloatingActionButtonElevation,
    interactionSource: MutableInteractionSource?,
    content: @Composable () -> Unit
)

Material Design medium floating action button
Cmn

Functions

MediumFloatingActionButton

Cmn 
@ExperimentalMaterial3ExpressiveApi
@Composable
fun MediumFloatingActionButton(
    onClick: () -> Unit,
    modifier: Modifier = Modifier,
    shape: Shape = FloatingActionButtonDefaults.mediumShape,
    containerColor: Color = FloatingActionButtonDefaults.containerColor,
    contentColor: Color = contentColorFor(containerColor),
    elevation: FloatingActionButtonElevation = FloatingActionButtonDefaults.elevation(),
    interactionSource: MutableInteractionSource? = null,
    content: @Composable () -> Unit
): Unit

Material Design medium floating action button

The FAB represents the most important action on a screen. It puts key actions within reach.

import androidx.compose.foundation.layout.size
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Add
import androidx.compose.material3.FloatingActionButton
import androidx.compose.material3.FloatingActionButtonDefaults
import androidx.compose.material3.Icon
import androidx.compose.material3.MediumFloatingActionButton
import androidx.compose.material3.PlainTooltip
import androidx.compose.material3.Text
import androidx.compose.material3.TooltipAnchorPosition
import androidx.compose.material3.TooltipBox
import androidx.compose.material3.TooltipDefaults
import androidx.compose.material3.rememberTooltipState
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier

// A FAB should have a tooltip associated with it.
TooltipBox(
    positionProvider =
        TooltipDefaults.rememberTooltipPositionProvider(TooltipAnchorPosition.Above),
    tooltip = { PlainTooltip { Text("Localized description") } },
    state = rememberTooltipState(),
) {
    MediumFloatingActionButton(onClick = { /* do something */ }) {
        Icon(
            Icons.Filled.Add,
            contentDescription = "Localized description",
            modifier = Modifier.size(FloatingActionButtonDefaults.MediumIconSize),
        )
    }
}

FABs can also be shown and hidden with an animation when the main content is scrolled:

import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.foundation.lazy.rememberLazyListState
import androidx.compose.material.icons.Icons
import androidx.compose.material.icons.filled.Add
import androidx.compose.material3.FabPosition
import androidx.compose.material3.FloatingActionButton
import androidx.compose.material3.FloatingActionButtonDefaults
import androidx.compose.material3.Icon
import androidx.compose.material3.MediumFloatingActionButton
import androidx.compose.material3.PlainTooltip
import androidx.compose.material3.Scaffold
import androidx.compose.material3.Text
import androidx.compose.material3.TooltipAnchorPosition
import androidx.compose.material3.TooltipBox
import androidx.compose.material3.TooltipDefaults
import androidx.compose.material3.animateFloatingActionButton
import androidx.compose.material3.rememberTooltipState
import androidx.compose.runtime.derivedStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.unit.dp

val listState = rememberLazyListState()
// The FAB is initially shown. Upon scrolling past the first item we hide the FAB by using a
// remembered derived state to minimize unnecessary compositions.
val fabVisible by remember { derivedStateOf { listState.firstVisibleItemIndex == 0 } }

Scaffold(
    floatingActionButton = {
        // A FAB should have a tooltip associated with it.
        TooltipBox(
            positionProvider =
                TooltipDefaults.rememberTooltipPositionProvider(TooltipAnchorPosition.Above),
            tooltip = { PlainTooltip { Text("Localized description") } },
            state = rememberTooltipState(),
        ) {
            MediumFloatingActionButton(
                modifier =
                    Modifier.animateFloatingActionButton(
                        visible = fabVisible,
                        alignment = Alignment.BottomEnd,
                    ),
                onClick = { /* do something */ },
            ) {
                Icon(
                    Icons.Filled.Add,
                    contentDescription = "Localized description",
                    modifier = Modifier.size(FloatingActionButtonDefaults.MediumIconSize),
                )
            }
        }
    },
    floatingActionButtonPosition = FabPosition.End,
) {
    LazyColumn(state = listState, modifier = Modifier.fillMaxSize()) {
        for (index in 0 until 100) {
            item { Text(text = "List item - $index", modifier = Modifier.padding(24.dp)) }
        }
    }
}
Parameters
onClick: () -> Unit

called when this FAB is clicked
modifier: Modifier = Modifier

the Modifier to be applied to this FAB
shape: Shape = FloatingActionButtonDefaults.mediumShape

defines the shape of this FAB's container and shadow (when using elevation)
containerColor: Color = FloatingActionButtonDefaults.containerColor

the color used for the background of this FAB. Use Color.Transparent to have no color.
contentColor: Color = contentColorFor(containerColor)

the preferred color for content inside this FAB. Defaults to either the matching content color for containerColor, or to the current LocalContentColor if containerColor is not a color from the theme.
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. Additionally, when the container color is ColorScheme.surface, this controls the amount of primary color applied as an overlay. See also: Surface.
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.
content: @Composable () -> Unit

the content of this FAB, typically an Icon