Toolbar

Kotlin |Java

open class Toolbar : ViewGroup

kotlin.Any
↳	android.view.View
	↳	android.view.ViewGroup
		↳	androidx.appcompat.widget.Toolbar

A standard toolbar for use within application content.

A Toolbar is a generalization of action bars for use within application layouts. While an action bar is traditionally part of an Activity's opaque window decor controlled by the framework, a Toolbar may be placed at any arbitrary level of nesting within a view hierarchy. An application may choose to designate a Toolbar as the action bar for an Activity using the setSupportActionBar() method.

Toolbar supports a more focused feature set than ActionBar. From start to end, a toolbar may contain a combination of the following optional elements:

• A navigation button. This may be an Up arrow, navigation menu toggle, close, collapse, done or another glyph of the app's choosing. This button should always be used to access other navigational destinations within the container of the Toolbar and its signified content or otherwise leave the current context signified by the Toolbar. The navigation button is vertically aligned within the Toolbar's minimum height, if set.
• A branded logo image. This may extend to the height of the bar and can be arbitrarily wide.
• A title and subtitle. The title should be a signpost for the Toolbar's current position in the navigation hierarchy and the content contained there. The subtitle, if present should indicate any extended information about the current content. If an app uses a logo image it should strongly consider omitting a title and subtitle.
• One or more custom views. The application may add arbitrary child views to the Toolbar. They will appear at this position within the layout. If a child view's LayoutParams indicates a Gravity value of CENTER_HORIZONTAL the view will attempt to center within the available space remaining in the Toolbar after all other elements have been measured.
• An action menu. The menu of actions will pin to the end of the Toolbar offering a few frequent, important or typical actions along with an optional overflow menu for additional actions. Action buttons are vertically aligned within the Toolbar's minimum height, if set.

In modern Android UIs developers should lean more on a visually distinct color scheme for toolbars than on their application icon. The use of application icon plus title as a standard layout is discouraged on API 21 devices and newer.

androidx.appcompat.R.attr#buttonGravity androidx.appcompat.R.attr#collapseContentDescription androidx.appcompat.R.attr#collapseIcon androidx.appcompat.R.attr#contentInsetEnd androidx.appcompat.R.attr#contentInsetLeft androidx.appcompat.R.attr#contentInsetRight androidx.appcompat.R.attr#contentInsetStart androidx.appcompat.R.attr#contentInsetStartWithNavigation androidx.appcompat.R.attr#contentInsetEndWithActions android.R.attr#gravity androidx.appcompat.R.attr#logo androidx.appcompat.R.attr#logoDescription androidx.appcompat.R.attr#maxButtonHeight androidx.appcompat.R.attr#navigationContentDescription androidx.appcompat.R.attr#navigationIcon androidx.appcompat.R.attr#popupTheme androidx.appcompat.R.attr#subtitle androidx.appcompat.R.attr#subtitleTextAppearance androidx.appcompat.R.attr#subtitleTextColor androidx.appcompat.R.attr#title androidx.appcompat.R.attr#titleMargin androidx.appcompat.R.attr#titleMarginBottom androidx.appcompat.R.attr#titleMarginEnd androidx.appcompat.R.attr#titleMarginStart androidx.appcompat.R.attr#titleMarginTop androidx.appcompat.R.attr#titleTextAppearance androidx.appcompat.R.attr#titleTextColor androidx.appcompat.R.attr#menu

Summary

Nested classes
open	LayoutParams Layout information for child views of Toolbars.
abstract	OnMenuItemClickListener Interface responsible for receiving menu item click events if the items themselves do not have individual item click listeners.
open	SavedState

Public constructors
<init>(@NonNull context: Context)
<init>(@NonNull context: Context, @Nullable attrs: AttributeSet?)
<init>(@NonNull context: Context, @Nullable attrs: AttributeSet?, defStyleAttr: Int)

Public methods
open Unit	collapseActionView() Collapse a currently expanded action view.
open Unit	dismissPopupMenus() Dismiss all currently showing popup menus, including overflow or submenus.
open Toolbar.LayoutParams!	generateLayoutParams(attrs: AttributeSet!)
open CharSequence?	getCollapseContentDescription() Retrieve the currently configured content description for the collapse button view.
open Drawable?	getCollapseIcon() Return the current drawable used as the collapse icon.
open Int	getContentInsetEnd() Gets the ending content inset for this toolbar.
open Int	getContentInsetEndWithActions() Gets the end content inset to use when action buttons are present.
open Int	getContentInsetLeft() Gets the left content inset for this toolbar.
open Int	getContentInsetRight() Gets the right content inset for this toolbar.
open Int	getContentInsetStart() Gets the starting content inset for this toolbar.
open Int	getContentInsetStartWithNavigation() Gets the start content inset to use when a navigation button is present.
open Int	getCurrentContentInsetEnd() Gets the content inset that will be used on the ending side of the bar in the current toolbar configuration.
open Int	getCurrentContentInsetLeft() Gets the content inset that will be used on the left side of the bar in the current toolbar configuration.
open Int	getCurrentContentInsetRight() Gets the content inset that will be used on the right side of the bar in the current toolbar configuration.
open Int	getCurrentContentInsetStart() Gets the content inset that will be used on the starting side of the bar in the current toolbar configuration.
open Drawable!	getLogo() Return the current logo drawable.
open CharSequence!	getLogoDescription() Return the description of the toolbar's logo.
open Menu!	getMenu() Return the Menu shown in the toolbar.
open CharSequence?	getNavigationContentDescription() Retrieve the currently configured content description for the navigation button view.
open Drawable?	getNavigationIcon() Return the current drawable used as the navigation icon.
open Drawable?	getOverflowIcon() Return the current drawable used as the overflow icon.
open Int	getPopupTheme()
open CharSequence!	getSubtitle() Return the subtitle of this toolbar.
open CharSequence!	getTitle() Returns the title of this toolbar.
open Int	getTitleMarginBottom()
open Int	getTitleMarginEnd()
open Int	getTitleMarginStart()
open Int	getTitleMarginTop()
open Boolean	hasExpandedActionView() Check whether this Toolbar is currently hosting an expanded action view.
open Boolean	hideOverflowMenu() Hide the overflow items from the associated menu.
open Unit	inflateMenu(@MenuRes resId: Int) Inflate a menu resource into this toolbar.
open Boolean	isOverflowMenuShowing() Check whether the overflow menu is currently showing.
open Boolean	onHoverEvent(ev: MotionEvent!)
open Unit	onRtlPropertiesChanged(layoutDirection: Int)
open Boolean	onTouchEvent(ev: MotionEvent!)
open Unit	setCollapseContentDescription(@StringRes resId: Int) Set a content description for the collapse button if one is present.
open Unit	setCollapseContentDescription(@Nullable description: CharSequence?) Set a content description for the collapse button if one is present.
open Unit	setCollapseIcon(@DrawableRes resId: Int) Set the icon to use for the toolbar's collapse button.
open Unit	setCollapseIcon(@Nullable icon: Drawable?) Set the icon to use for the toolbar's collapse button.
open Unit	setContentInsetEndWithActions(insetEndWithActions: Int) Sets the start content inset to use when action buttons are present.
open Unit	setContentInsetStartWithNavigation(insetStartWithNavigation: Int) Sets the start content inset to use when a navigation button is present.
open Unit	setContentInsetsAbsolute(contentInsetLeft: Int, contentInsetRight: Int) Sets the content insets for this toolbar.
open Unit	setContentInsetsRelative(contentInsetStart: Int, contentInsetEnd: Int) Sets the content insets for this toolbar relative to layout direction.
open Unit	setLogo(@DrawableRes resId: Int) Set a logo drawable from a resource id.
open Unit	setLogo(drawable: Drawable!) Set a logo drawable.
open Unit	setLogoDescription(@StringRes resId: Int) Set a description of the toolbar's logo.
open Unit	setLogoDescription(description: CharSequence!) Set a description of the toolbar's logo.
open Unit	setNavigationContentDescription(@StringRes resId: Int) Set a content description for the navigation button if one is present.
open Unit	setNavigationContentDescription(@Nullable description: CharSequence?) Set a content description for the navigation button if one is present.
open Unit	setNavigationIcon(@DrawableRes resId: Int) Set the icon to use for the toolbar's navigation button.
open Unit	setNavigationIcon(@Nullable icon: Drawable?) Set the icon to use for the toolbar's navigation button.