ActionBar

Kotlin |Java

abstract class ActionBar

kotlin.Any
↳	androidx.appcompat.app.ActionBar

A primary toolbar within the activity that may display the activity title, application-level navigation affordances, and other interactive items.

The action bar appears at the top of an activity's window when the activity uses the AppCompat's R.style#Theme_AppCompat theme (or one of its descendant themes). You may otherwise add the action bar by calling or by declaring it in a custom theme with the R.styleable#AppCompatTheme_windowActionBar property.

The action bar may be represented by any Toolbar widget within the application layout. The application may signal to the Activity which Toolbar should be treated as the Activity's action bar. Activities that use this feature should use one of the supplied .NoActionBar themes, set the R.styleable#AppCompatTheme_windowActionBar attribute to false or otherwise not request the window feature.

If your activity has an options menu, you can make select items accessible directly from the action bar as "action items". You can also modify various characteristics of the action bar or remove it completely.

The navigation button (formerly "Home") takes over the space previously occupied by the application icon. Apps wishing to express a stronger branding should use their brand colors heavily in the action bar and other application chrome or use a logo in place of their standard title text.

From your activity, you can retrieve an instance of ActionBar by calling getSupportActionBar()}.

In some cases, the action bar may be overlayed by another bar that enables contextual actions, using an ActionMode. For example, when the user selects one or more items in your activity, you can enable an action mode that offers actions specific to the selected items, with a UI that temporarily replaces the action bar. Although the UI may occupy the same space, the ActionMode APIs are distinct and independent from those for ActionBar.

Summary

Nested classes
open	`LayoutParams` Per-child layout information associated with action bar custom views.
abstract	`OnMenuVisibilityListener` Listener for receiving events when action bar menus are shown or hidden.
abstract	`OnNavigationListener` Listener interface for ActionBar navigation events.
abstract	`Tab` A tab in the action bar.
abstract	`TabListener` Callback interface invoked when a tab is focused, unfocused, added, or removed.

Constants
static Int	`DISPLAY_HOME_AS_UP` Display the 'home' element such that it appears as an 'up' affordance.
static Int	`DISPLAY_SHOW_CUSTOM` Show the custom view if one has been set.
static Int	`DISPLAY_SHOW_HOME` Show 'home' elements in this action bar, leaving more space for other navigation elements.
static Int	`DISPLAY_SHOW_TITLE` Show the activity title and subtitle, if present.
static Int	`DISPLAY_USE_LOGO` Use logo instead of icon if available.
static Int	`NAVIGATION_MODE_LIST` List navigation mode.
static Int	`NAVIGATION_MODE_STANDARD` Standard navigation mode.
static Int	`NAVIGATION_MODE_TABS` Tab navigation mode.

Public constructors
`<init>()` A primary toolbar within the activity that may display the activity title, application-level navigation affordances, and other interactive items.

Public methods
abstract Unit	`addOnMenuVisibilityListener(listener: ActionBar.OnMenuVisibilityListener!)` Add a listener that will respond to menu visibility change events.
abstract Unit	`addTab(tab: ActionBar.Tab!)` Add a tab for use in tabbed navigation mode.
abstract Unit	`addTab(tab: ActionBar.Tab!, setSelected: Boolean)` Add a tab for use in tabbed navigation mode.
abstract Unit	`addTab(tab: ActionBar.Tab!, position: Int)` Add a tab for use in tabbed navigation mode.
abstract Unit	`addTab(tab: ActionBar.Tab!, position: Int, setSelected: Boolean)` Add a tab for use in tabbed navigation mode.
abstract View!	`getCustomView()`
abstract Int	`getDisplayOptions()`
open Float	`getElevation()` Get the Z-axis elevation of the action bar in pixels.
abstract Int	`getHeight()` Retrieve the current height of the ActionBar.
open Int	`getHideOffset()` Return the current vertical offset of the action bar.
abstract Int	`getNavigationItemCount()` Get the number of navigation items present in the current navigation mode.
abstract Int	`getNavigationMode()` Returns the current navigation mode.
abstract Int	`getSelectedNavigationIndex()` Get the position of the selected navigation item in list or tabbed navigation modes.
abstract ActionBar.Tab?	`getSelectedTab()` Returns the currently selected tab if in tabbed navigation mode and there is at least one tab present.
abstract CharSequence?	`getSubtitle()` Returns the current ActionBar subtitle in standard mode.
abstract ActionBar.Tab!	`getTabAt(index: Int)` Returns the tab at the specified index.
abstract Int	`getTabCount()` Returns the number of tabs currently registered with the action bar.
open Context!	`getThemedContext()` Returns a `Context` with an appropriate theme for creating views that will appear in the action bar.
abstract CharSequence?	`getTitle()` Returns the current ActionBar title in standard mode.
abstract Unit	`hide()` Hide the ActionBar if it is currently showing.
open Boolean	`isHideOnContentScrollEnabled()` Return whether the action bar is configured to scroll out of sight along with a `nested scrolling child`.
abstract Boolean	`isShowing()`
abstract ActionBar.Tab!	`newTab()` Create and return a new `Tab`.
abstract Unit	`removeAllTabs()` Remove all tabs from the action bar and deselect the current tab.
abstract Unit	`removeOnMenuVisibilityListener(listener: ActionBar.OnMenuVisibilityListener!)` Remove a menu visibility listener.
abstract Unit	`removeTab(tab: ActionBar.Tab!)` Remove a tab from the action bar.
abstract Unit	`removeTabAt(position: Int)` Remove a tab from the action bar.
abstract Unit	`selectTab(tab: ActionBar.Tab!)` Select the specified tab.
abstract Unit	`setBackgroundDrawable(@Nullable d: Drawable?)` Set the ActionBar's background.
abstract Unit	`setCustomView(view: View!)` Set the action bar into custom navigation mode, supplying a view for custom navigation.
abstract Unit	`setCustomView(view: View!, layoutParams: ActionBar.LayoutParams!)` Set the action bar into custom navigation mode, supplying a view for custom navigation.
abstract Unit	`setCustomView(resId: Int)` Set the action bar into custom navigation mode, supplying a view for custom navigation.
abstract Unit	`setDisplayHomeAsUpEnabled(showHomeAsUp: Boolean)` Set whether home should be displayed as an "up" affordance.
abstract Unit	`setDisplayOptions(options: Int)` Set display options.
abstract Unit	`setDisplayOptions(options: Int, mask: Int)` Set selected display options.
abstract Unit	`setDisplayShowCustomEnabled(showCustom: Boolean)` Set whether a custom view should be displayed, if set.
abstract Unit	`setDisplayShowHomeEnabled(showHome: Boolean)` Set whether to include the application home affordance in the action bar.
abstract Unit	`setDisplayShowTitleEnabled(showTitle: Boolean)` Set whether an activity title/subtitle should be displayed.
abstract Unit	`setDisplayUseLogoEnabled(useLogo: Boolean)` Set whether to display the activity logo rather than the activity icon.
open Unit	`setElevation(elevation: Float)` Set the Z-axis elevation of the action bar in pixels.
open Unit	`setHideOffset(offset: Int)` Set the current hide offset of the action bar.
open Unit	`setHideOnContentScrollEnabled(hideOnContentScroll: Boolean)` Enable hiding the action bar on content scroll.
open Unit	`setHomeActionContentDescription(@Nullable description: CharSequence?)` Set an alternate description for the Home/Up action, when enabled.
open Unit	`setHomeActionContentDescription(@StringRes resId: Int)` Set an alternate description for the Home/Up action, when enabled.
open Unit	`setHomeAsUpIndicator(@Nullable indicator: Drawable?)` Set an alternate drawable to display next to the icon/logo/title when `DISPLAY_HOME_AS_UP` is enabled.
open Unit	`setHomeAsUpIndicator(@DrawableRes resId: Int)` Set an alternate drawable to display next to the icon/logo/title when `DISPLAY_HOME_AS_UP` is enabled.
open Unit	`setHomeButtonEnabled(enabled: Boolean)` Enable or disable the "home" button in the corner of the action bar.
abstract Unit	`setIcon(@DrawableRes resId: Int)` Set the icon to display in the 'home' section of the action bar.
abstract Unit	`setIcon(icon: Drawable!)` Set the icon to display in the 'home' section of the action bar.
abstract Unit	`setListNavigationCallbacks(adapter: SpinnerAdapter!, callback: ActionBar.OnNavigationListener!)` Set the adapter and navigation callback for list navigation mode.
abstract Unit	`setLogo(@DrawableRes resId: Int)` Set the logo to display in the 'home' section of the action bar.
abstract Unit	`setLogo(logo: Drawable!)` Set the logo to display in the 'home' section of the action bar.
abstract Unit	`setNavigationMode(mode: Int)` Set the current navigation mode.
abstract Unit	`setSelectedNavigationItem(position: Int)` Set the selected navigation item in list or tabbed navigation modes.
open Unit	`setSplitBackgroundDrawable(d: Drawable!)` Set the ActionBar's split background.
open Unit	`setStackedBackgroundDrawable(d: Drawable!)` Set the ActionBar's stacked background.
abstract Unit	`setSubtitle(subtitle: CharSequence!)` Set the action bar's subtitle.
abstract Unit	`setSubtitle(resId: Int)` Set the action bar's subtitle.
abstract Unit	`setTitle(title: CharSequence!)` Set the action bar's title.
abstract Unit	`setTitle(@StringRes resId: Int)` Set the action bar's title.
abstract Unit	`show()` Show the ActionBar if it is not currently showing.

Constants

DISPLAY_HOME_AS_UP

static val DISPLAY_HOME_AS_UP: Int

Display the 'home' element such that it appears as an 'up' affordance. e.g. show an arrow to the left indicating the action that will be taken. Set this flag if selecting the 'home' button in the action bar to return up by a single level in your UI rather than back to the top level or front page.

Setting this option will implicitly enable interaction with the home/up button. See setHomeButtonEnabled(boolean).

Value: android.app.ActionBar.DISPLAY_HOME_AS_UP

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

DISPLAY_SHOW_CUSTOM

static val DISPLAY_SHOW_CUSTOM: Int

Show the custom view if one has been set.

Value: android.app.ActionBar.DISPLAY_SHOW_CUSTOM

See Also

#setCustomView(View)#setDisplayOptions(int)#setDisplayOptions(int, int)

DISPLAY_SHOW_HOME

static val DISPLAY_SHOW_HOME: Int

Show 'home' elements in this action bar, leaving more space for other navigation elements. This includes logo and icon.

Value: android.app.ActionBar.DISPLAY_SHOW_HOME

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

DISPLAY_SHOW_TITLE

static val DISPLAY_SHOW_TITLE: Int

Show the activity title and subtitle, if present.

Value: android.app.ActionBar.DISPLAY_SHOW_TITLE

See Also

#setTitle(CharSequence)#setTitle(int)#setSubtitle(CharSequence)#setSubtitle(int)#setDisplayOptions(int)#setDisplayOptions(int, int)

DISPLAY_USE_LOGO

static val DISPLAY_USE_LOGO: Int

Use logo instead of icon if available. This flag will cause appropriate navigation modes to use a wider logo in place of the standard icon.

Value: android.app.ActionBar.DISPLAY_USE_LOGO

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

NAVIGATION_MODE_LIST

static val NAVIGATION_MODE_LIST: Int

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

List navigation mode. Instead of static title text this mode presents a list menu for navigation within the activity. e.g. this might be presented to the user as a dropdown list.

Value: 1

NAVIGATION_MODE_STANDARD

static val NAVIGATION_MODE_STANDARD: Int

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Standard navigation mode. Consists of either a logo or icon and title text with an optional subtitle. Clicking any of these elements will dispatch onOptionsItemSelected to the host Activity with a MenuItem with item ID android.R.id.home.

Value: 0

NAVIGATION_MODE_TABS

static val NAVIGATION_MODE_TABS: Int

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Tab navigation mode. Instead of static title text this mode presents a series of tabs for navigation within the activity.

Value: 2

Public constructors

<init>

ActionBar()

A primary toolbar within the activity that may display the activity title, application-level navigation affordances, and other interactive items.

From your activity, you can retrieve an instance of ActionBar by calling getSupportActionBar()}.

Public methods

addOnMenuVisibilityListener

abstract fun addOnMenuVisibilityListener(listener: ActionBar.OnMenuVisibilityListener!): Unit

Add a listener that will respond to menu visibility change events.

Parameters
`listener`	ActionBar.OnMenuVisibilityListener!: The new listener to add

addTab

abstract fun addTab(tab: ActionBar.Tab!): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Add a tab for use in tabbed navigation mode. The tab will be added at the end of the list. If this is the first tab to be added it will become the selected tab.

Parameters
`tab`	ActionBar.Tab!: Tab to add

addTab

abstract fun addTab(
    tab: ActionBar.Tab!, 
    setSelected: Boolean
): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Add a tab for use in tabbed navigation mode. The tab will be added at the end of the list.

Parameters
`tab`	ActionBar.Tab!: Tab to add
`setSelected`	Boolean: True if the added tab should become the selected tab.

addTab

abstract fun addTab(
    tab: ActionBar.Tab!, 
    position: Int
): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Add a tab for use in tabbed navigation mode. The tab will be inserted at position. If this is the first tab to be added it will become the selected tab.

Parameters
`tab`	ActionBar.Tab!: The tab to add
`position`	Int: The new position of the tab

addTab

abstract fun addTab(
    tab: ActionBar.Tab!, 
    position: Int, 
    setSelected: Boolean
): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Add a tab for use in tabbed navigation mode. The tab will be inserted at position.

Parameters
`tab`	ActionBar.Tab!: The tab to add
`position`	Int: The new position of the tab
`setSelected`	Boolean: True if the added tab should become the selected tab.

getCustomView

abstract fun getCustomView(): View!

Return
View!: The current custom view.

getDisplayOptions

abstract fun getDisplayOptions(): Int

Return
Int: The current set of display options.

getElevation

open fun getElevation(): Float

Get the Z-axis elevation of the action bar in pixels.

The action bar's elevation is the distance it is placed from its parent surface. Higher values are closer to the user.

Return
Float: Elevation value in pixels

getHeight

abstract fun getHeight(): Int

Retrieve the current height of the ActionBar.

Return
Int: The ActionBar's height

getHideOffset

open fun getHideOffset(): Int

Return the current vertical offset of the action bar.

The action bar's current hide offset is the distance that the action bar is currently scrolled offscreen in pixels. The valid range is 0 (fully visible) to the action bar's current measured height (fully invisible).

Return
Int: The action bar's offset toward its fully hidden state in pixels

getNavigationItemCount

abstract fun getNavigationItemCount(): Int

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Get the number of navigation items present in the current navigation mode.

Return
Int: Number of navigation items.

getNavigationMode

abstract fun getNavigationMode(): Int

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Returns the current navigation mode. The result will be one of:

NAVIGATION_MODE_STANDARD
NAVIGATION_MODE_LIST
NAVIGATION_MODE_TABS

Return
Int: The current navigation mode.

getSelectedNavigationIndex

abstract fun getSelectedNavigationIndex(): Int

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Get the position of the selected navigation item in list or tabbed navigation modes.

Return
Int: Position of the selected item.

getSelectedTab

@Nullable abstract fun getSelectedTab(): ActionBar.Tab?

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Returns the currently selected tab if in tabbed navigation mode and there is at least one tab present.

Return
ActionBar.Tab?: The currently selected tab or null

getSubtitle

@Nullable abstract fun getSubtitle(): CharSequence?

Returns the current ActionBar subtitle in standard mode. Returns null if getNavigationMode() would not return NAVIGATION_MODE_STANDARD.

Return
CharSequence?: The current ActionBar subtitle or null.

getTabAt

abstract fun getTabAt(index: Int): ActionBar.Tab!

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Returns the tab at the specified index.

Parameters
`index`	Int: Index value in the range 0-get

Return
ActionBar.Tab!:

getTabCount

abstract fun getTabCount(): Int

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Returns the number of tabs currently registered with the action bar.

Return
Int: Tab count

getThemedContext

open fun getThemedContext(): Context!

Returns a Context with an appropriate theme for creating views that will appear in the action bar. If you are inflating or instantiating custom views that will appear in an action bar, you should use the Context returned by this method. (This includes adapters used for list navigation mode.) This will ensure that views contrast properly against the action bar.

Return
Context!: A themed Context for creating views

getTitle

@Nullable abstract fun getTitle(): CharSequence?

Returns the current ActionBar title in standard mode. Returns null if getNavigationMode() would not return NAVIGATION_MODE_STANDARD.

Return
CharSequence?: The current ActionBar title or null.

hide

abstract fun hide(): Unit

Hide the ActionBar if it is currently showing. If the window hosting the ActionBar does not have the feature Window#FEATURE_ACTION_BAR_OVERLAY it will resize application content to fit the new space available.

Instead of calling this function directly, you can also cause an ActionBar using the overlay feature to hide through View.SYSTEM_UI_FLAG_FULLSCREEN. Hiding the ActionBar through this system UI flag allows you to more seamlessly hide it in conjunction with other screen decorations.

isHideOnContentScrollEnabled

open fun isHideOnContentScrollEnabled(): Boolean

Return whether the action bar is configured to scroll out of sight along with a nested scrolling child.

Return
Boolean: true if hide-on-content-scroll is enabled

See Also

#setHideOnContentScrollEnabled(boolean)

isShowing

abstract fun isShowing(): Boolean

Return
Boolean: `true` if the ActionBar is showing, `false` otherwise.

newTab

abstract fun newTab(): ActionBar.Tab!

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Create and return a new Tab. This tab will not be included in the action bar until it is added.

Return
ActionBar.Tab!: A new Tab

See Also

#addTab(Tab)

removeAllTabs

abstract fun removeAllTabs(): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Remove all tabs from the action bar and deselect the current tab.

removeOnMenuVisibilityListener

abstract fun removeOnMenuVisibilityListener(listener: ActionBar.OnMenuVisibilityListener!): Unit

Remove a menu visibility listener. This listener will no longer receive menu visibility change events.

Parameters
`listener`	ActionBar.OnMenuVisibilityListener!: A listener to remove that was previously added

removeTab

abstract fun removeTab(tab: ActionBar.Tab!): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Remove a tab from the action bar. If the removed tab was selected it will be deselected and another tab will be selected if present.

Parameters
`tab`	ActionBar.Tab!: The tab to remove

removeTabAt

abstract fun removeTabAt(position: Int): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Remove a tab from the action bar. If the removed tab was selected it will be deselected and another tab will be selected if present.

Parameters
`position`	Int: Position of the tab to remove

selectTab

abstract fun selectTab(tab: ActionBar.Tab!): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Select the specified tab. If it is not a child of this action bar it will be added.

Note: If you want to select by index, use setSelectedNavigationItem(int).

Parameters
`tab`	ActionBar.Tab!: Tab to select

setBackgroundDrawable

abstract fun setBackgroundDrawable(@Nullable d: Drawable?): Unit

Set the ActionBar's background. This will be used for the primary action bar.

Parameters
`d`	Drawable?: Background drawable

See Also

#setStackedBackgroundDrawable(Drawable)#setSplitBackgroundDrawable(Drawable)

setCustomView

abstract fun setCustomView(view: View!): Unit

Set the action bar into custom navigation mode, supplying a view for custom navigation. Custom navigation views appear between the application icon and any action buttons and may use any space available there. Common use cases for custom navigation views might include an auto-suggesting address bar for a browser or other navigation mechanisms that do not translate well to provided navigation modes.

Parameters
`view`	View!: Custom navigation view to place in the ActionBar.

setCustomView

abstract fun setCustomView(
    view: View!, 
    layoutParams: ActionBar.LayoutParams!
): Unit

Set the action bar into custom navigation mode, supplying a view for custom navigation.

Custom navigation views appear between the application icon and any action buttons and may use any space available there. Common use cases for custom navigation views might include an auto-suggesting address bar for a browser or other navigation mechanisms that do not translate well to provided navigation modes.

The display option DISPLAY_SHOW_CUSTOM must be set for the custom view to be displayed.

Parameters
`view`	View!: Custom navigation view to place in the ActionBar.
`layoutParams`	ActionBar.LayoutParams!: How this custom view should layout in the bar.

See Also

#setDisplayOptions(int, int)

setCustomView

abstract fun setCustomView(resId: Int): Unit

Set the action bar into custom navigation mode, supplying a view for custom navigation.

The display option DISPLAY_SHOW_CUSTOM must be set for the custom view to be displayed.

Parameters
`resId`	Int: Resource ID of a layout to inflate into the ActionBar.

See Also

#setDisplayOptions(int, int)

setDisplayHomeAsUpEnabled

abstract fun setDisplayHomeAsUpEnabled(showHomeAsUp: Boolean): Unit

Set whether home should be displayed as an "up" affordance. Set this to true if selecting "home" returns up by a single level in your UI rather than back to the top level or front page.

To set several display options at once, see the setDisplayOptions methods.

Parameters
`showHomeAsUp`	Boolean: true to show the user that selecting home will return one level up rather than to the top level of the app.

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

setDisplayOptions

abstract fun setDisplayOptions(options: Int): Unit

Set display options. This changes all display option bits at once. To change a limited subset of display options, see setDisplayOptions(int, int).

Parameters
`options`	Int: A combination of the bits defined by the DISPLAY_ constants defined in ActionBar.

setDisplayOptions

abstract fun setDisplayOptions(
    options: Int, 
    mask: Int
): Unit

Set selected display options. Only the options specified by mask will be changed. To change all display option bits at once, see setDisplayOptions(int).

Example: setDisplayOptions(0, DISPLAY_SHOW_HOME) will disable the DISPLAY_SHOW_HOME option. setDisplayOptions(DISPLAY_SHOW_HOME, DISPLAY_SHOW_HOME | DISPLAY_USE_LOGO) will enable DISPLAY_SHOW_HOME and disable DISPLAY_USE_LOGO.

Parameters
`options`	Int: A combination of the bits defined by the DISPLAY_ constants defined in ActionBar.
`mask`	Int: A bit mask declaring which display options should be changed.

setDisplayShowCustomEnabled

abstract fun setDisplayShowCustomEnabled(showCustom: Boolean): Unit

Set whether a custom view should be displayed, if set.

To set several display options at once, see the setDisplayOptions methods.

Parameters
`showCustom`	Boolean: true if the currently set custom view should be displayed, false otherwise.

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

setDisplayShowHomeEnabled

abstract fun setDisplayShowHomeEnabled(showHome: Boolean): Unit

Set whether to include the application home affordance in the action bar. Home is presented as either an activity icon or logo.

To set several display options at once, see the setDisplayOptions methods.

Parameters
`showHome`	Boolean: true to show home, false otherwise.

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

setDisplayShowTitleEnabled

abstract fun setDisplayShowTitleEnabled(showTitle: Boolean): Unit

Set whether an activity title/subtitle should be displayed.

To set several display options at once, see the setDisplayOptions methods.

Parameters
`showTitle`	Boolean: true to display a title/subtitle if present.

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

setDisplayUseLogoEnabled

abstract fun setDisplayUseLogoEnabled(useLogo: Boolean): Unit

Set whether to display the activity logo rather than the activity icon. A logo is often a wider, more detailed image.

To set several display options at once, see the setDisplayOptions methods.

Parameters
`useLogo`	Boolean: true to use the activity logo, false to use the activity icon.

See Also

#setDisplayOptions(int)#setDisplayOptions(int, int)

setElevation

open fun setElevation(elevation: Float): Unit

Set the Z-axis elevation of the action bar in pixels.

The action bar's elevation is the distance it is placed from its parent surface. Higher values are closer to the user.

Parameters
`elevation`	Float: Elevation value in pixels

setHideOffset

open fun setHideOffset(offset: Int): Unit

Set the current hide offset of the action bar.

Parameters
`offset`	Int: The action bar's offset toward its fully hidden state in pixels.

setHideOnContentScrollEnabled

open fun setHideOnContentScrollEnabled(hideOnContentScroll: Boolean): Unit

Enable hiding the action bar on content scroll.

If enabled, the action bar will scroll out of sight along with a nested scrolling child view's content. The action bar must be in overlay mode to enable hiding on content scroll.

When partially scrolled off screen the action bar is considered hidden. A call to show will cause it to return to full view.

Parameters
`hideOnContentScroll`	Boolean: true to enable hiding on content scroll.

setHomeActionContentDescription

open fun setHomeActionContentDescription(@Nullable description: CharSequence?): Unit

Set an alternate description for the Home/Up action, when enabled.

This description is commonly used for accessibility/screen readers when the Home action is enabled. (See setDisplayHomeAsUpEnabled(boolean).) Examples of this are, "Navigate Home" or "Navigate Up" depending on the DISPLAY_HOME_AS_UP display option. If you have changed the home-as-up indicator using setHomeAsUpIndicator(int) to indicate more specific functionality such as a sliding drawer, you should also set this to accurately describe the action.

Setting this to null will use the system default description.

Parameters
`description`	CharSequence?: New description for the Home action when enabled

See Also

#setHomeAsUpIndicator(int)#setHomeAsUpIndicator(android.graphics.drawable.Drawable)

setHomeActionContentDescription

open fun setHomeActionContentDescription(@StringRes resId: Int): Unit

Set an alternate description for the Home/Up action, when enabled.

Setting this to 0 will use the system default description.

Parameters
`resId`	Int: Resource ID of a string to use as the new description for the Home action when enabled

See Also

#setHomeAsUpIndicator(int)#setHomeAsUpIndicator(android.graphics.drawable.Drawable)

setHomeAsUpIndicator

open fun setHomeAsUpIndicator(@Nullable indicator: Drawable?): Unit

Set an alternate drawable to display next to the icon/logo/title when DISPLAY_HOME_AS_UP is enabled. This can be useful if you are using this mode to display an alternate selection for up navigation, such as a sliding drawer.

If you pass null to this method, the default drawable from the theme will be used.

If you implement alternate or intermediate behavior around Up, you should also call setHomeActionContentDescription() to provide a correct description of the action for accessibility support.

Parameters
`indicator`	Drawable?: A drawable to use for the up indicator, or null to use the theme's default

See Also

#setDisplayOptions(int, int)#setDisplayHomeAsUpEnabled(boolean)#setHomeActionContentDescription(int)

setHomeAsUpIndicator

open fun setHomeAsUpIndicator(@DrawableRes resId: Int): Unit

If you pass 0 to this method, the default drawable from the theme will be used.

If you implement alternate or intermediate behavior around Up, you should also call setHomeActionContentDescription() to provide a correct description of the action for accessibility support.

Parameters
`resId`	Int: Resource ID of a drawable to use for the up indicator, or null to use the theme's default

See Also

#setDisplayOptions(int, int)#setDisplayHomeAsUpEnabled(boolean)#setHomeActionContentDescription(int)

setHomeButtonEnabled

open fun setHomeButtonEnabled(enabled: Boolean): Unit

Enable or disable the "home" button in the corner of the action bar. (Note that this is the application home/up affordance on the action bar, not the system wide home button.)

This defaults to true for packages targeting < API 14. For packages targeting API 14 or greater, the application should call this method to enable interaction with the home/up affordance.

Setting the DISPLAY_HOME_AS_UP display option will automatically enable the home button.

Parameters
`enabled`	Boolean: true to enable the home button, false to disable the home button.

setIcon

abstract fun setIcon(@DrawableRes resId: Int): Unit

Set the icon to display in the 'home' section of the action bar. The action bar will use an icon specified by its style or the activity icon by default. Whether the home section shows an icon or logo is controlled by the display option DISPLAY_USE_LOGO.

Parameters
`resId`	Int: Resource ID of a drawable to show as an icon.

See Also

#setDisplayUseLogoEnabled(boolean)#setDisplayShowHomeEnabled(boolean)

setIcon

abstract fun setIcon(icon: Drawable!): Unit

Parameters
`icon`	Drawable!: Drawable to show as an icon.

See Also

#setDisplayUseLogoEnabled(boolean)#setDisplayShowHomeEnabled(boolean)

setListNavigationCallbacks

abstract fun setListNavigationCallbacks(
    adapter: SpinnerAdapter!, 
    callback: ActionBar.OnNavigationListener!
): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Set the adapter and navigation callback for list navigation mode. The supplied adapter will provide views for the expanded list as well as the currently selected item. (These may be displayed differently.) The supplied OnNavigationListener will alert the application when the user changes the current list selection.

Parameters
`adapter`	SpinnerAdapter!: An adapter that will provide views both to display the current navigation selection and populate views within the dropdown navigation menu.
`callback`	ActionBar.OnNavigationListener!: An OnNavigationListener that will receive events when the user selects a navigation item.

setLogo

abstract fun setLogo(@DrawableRes resId: Int): Unit

Set the logo to display in the 'home' section of the action bar. The action bar will use a logo specified by its style or the activity logo by default. Whether the home section shows an icon or logo is controlled by the display option DISPLAY_USE_LOGO.

Parameters
`resId`	Int: Resource ID of a drawable to show as a logo.

See Also

#setDisplayUseLogoEnabled(boolean)#setDisplayShowHomeEnabled(boolean)

setLogo

abstract fun setLogo(logo: Drawable!): Unit

Parameters
`logo`	Drawable!: Drawable to show as a logo.

See Also

#setDisplayUseLogoEnabled(boolean)#setDisplayShowHomeEnabled(boolean)

setNavigationMode

abstract fun setNavigationMode(mode: Int): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Set the current navigation mode.

Parameters
`mode`	Int: The new mode to set.

See Also

#NAVIGATION_MODE_STANDARD#NAVIGATION_MODE_LIST#NAVIGATION_MODE_TABS

setSelectedNavigationItem

abstract fun setSelectedNavigationItem(position: Int): Unit

Deprecated: Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Set the selected navigation item in list or tabbed navigation modes.

Parameters
`position`	Int: Position of the item to select.

setSplitBackgroundDrawable

open fun setSplitBackgroundDrawable(d: Drawable!): Unit

Set the ActionBar's split background. This will appear in the split action bar containing menu-provided action buttons on some devices and configurations.

You can enable split action bar with android.R.attr#uiOptions

Parameters
`d`	Drawable!: Background drawable for the split bar

setStackedBackgroundDrawable

open fun setStackedBackgroundDrawable(d: Drawable!): Unit

Set the ActionBar's stacked background. This will appear in the second row/stacked bar on some devices and configurations.

Parameters
`d`	Drawable!: Background drawable for the stacked row

setSubtitle

abstract fun setSubtitle(subtitle: CharSequence!): Unit

Set the action bar's subtitle. This will only be displayed if DISPLAY_SHOW_TITLE is set. Set to null to disable the subtitle entirely.

Parameters
`subtitle`	CharSequence!: Subtitle to set

See Also

#setSubtitle(int)#setDisplayOptions(int, int)

setSubtitle

abstract fun setSubtitle(resId: Int): Unit

Set the action bar's subtitle. This will only be displayed if DISPLAY_SHOW_TITLE is set.

Parameters
`resId`	Int: Resource ID of subtitle string to set

See Also

#setSubtitle(CharSequence)#setDisplayOptions(int, int)

setTitle

abstract fun setTitle(title: CharSequence!): Unit

Set the action bar's title. This will only be displayed if DISPLAY_SHOW_TITLE is set.

Parameters
`title`	CharSequence!: Title to set

See Also

#setTitle(int)#setDisplayOptions(int, int)

setTitle

abstract fun setTitle(@StringRes resId: Int): Unit

Set the action bar's title. This will only be displayed if DISPLAY_SHOW_TITLE is set.

Parameters
`resId`	Int: Resource ID of title string to set

See Also

#setTitle(CharSequence)#setDisplayOptions(int, int)

show

abstract fun show(): Unit

Show the ActionBar if it is not currently showing. If the window hosting the ActionBar does not have the feature Window#FEATURE_ACTION_BAR_OVERLAY it will resize application content to fit the new space available.

If you are hiding the ActionBar through View.SYSTEM_UI_FLAG_FULLSCREEN, you should not call this function directly.

ActionBar

Summary

Nested classes

Constants

Public constructors

Public methods

Constants

DISPLAY_HOME_AS_UP

DISPLAY_SHOW_CUSTOM

DISPLAY_SHOW_HOME

DISPLAY_SHOW_TITLE

DISPLAY_USE_LOGO

NAVIGATION_MODE_LIST

NAVIGATION_MODE_STANDARD

NAVIGATION_MODE_TABS

Public constructors

<init>

Public methods

addOnMenuVisibilityListener

addTab

addTab

addTab

addTab

getCustomView

getDisplayOptions

getElevation

getHeight

getHideOffset

getNavigationItemCount

getNavigationMode

getSelectedNavigationIndex

getSelectedTab

getSubtitle

getTabAt

getTabCount

getThemedContext

getTitle

hide

isHideOnContentScrollEnabled

isShowing

newTab

removeAllTabs

removeOnMenuVisibilityListener

removeTab

removeTabAt

selectTab

setBackgroundDrawable

setCustomView

setCustomView

setCustomView

setDisplayHomeAsUpEnabled

setDisplayOptions

setDisplayOptions

setDisplayShowCustomEnabled

setDisplayShowHomeEnabled

setDisplayShowTitleEnabled

setDisplayUseLogoEnabled

setElevation

setHideOffset

setHideOnContentScrollEnabled

setHomeActionContentDescription

setHomeActionContentDescription

setHomeAsUpIndicator

setHomeAsUpIndicator

setHomeButtonEnabled

setIcon

setIcon

setListNavigationCallbacks

setLogo

setLogo

setNavigationMode

setSelectedNavigationItem

setSplitBackgroundDrawable

setStackedBackgroundDrawable

setSubtitle

setSubtitle

setTitle

setTitle

show