ActionBar

abstract class 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 AppCompat theme (or one of its descendant themes). You may otherwise add the action bar by calling requestFeature(FEATURE_SUPPORT_ACTION_BAR) or by declaring it in a custom theme with the 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 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 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 types

Per-child layout information associated with action bar custom views.

Listener for receiving events when action bar menus are shown or hidden.

This interface is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract class ActionBar.Tab

This class is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

This interface is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

Constants

const 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.

const Int

Show the custom view if one has been set.

const Int

Show 'home' elements in this action bar, leaving more space for other navigation elements.

const Int

Show the activity title and subtitle, if present.

const Int

Use logo instead of icon if available.

const Int

This property is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

const Int

This property is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

const Int

This property is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

Public constructors

Public functions

abstract Unit

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

abstract Unit

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

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

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

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

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

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

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract View!
abstract Int
Float

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

abstract Int

Retrieve the current height of the ActionBar.

Int

Return the current vertical offset of the action bar.

abstract Int

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Int

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Int

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract ActionBar.Tab?

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract CharSequence?

Returns the current ActionBar subtitle in standard mode.

abstract ActionBar.Tab!
getTabAt(index: Int)

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Int

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

Context!

Returns a Context with an appropriate theme for creating views that will appear in the action bar.

abstract CharSequence?

Returns the current ActionBar title in standard mode.

abstract Unit

Hide the ActionBar if it is currently showing.

Boolean

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

abstract Boolean
abstract ActionBar.Tab!

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Unit

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Unit

Remove a menu visibility listener.

abstract Unit

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Unit
removeTabAt(position: Int)

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Unit

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Unit

Set the ActionBar's background.

abstract Unit

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

abstract Unit

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

Set whether home should be displayed as an "up" affordance.

abstract Unit

Set display options.

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

Set selected display options.

abstract Unit

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

abstract Unit

Set whether to include the application home affordance in the action bar.

abstract Unit

Set whether an activity title/subtitle should be displayed.

abstract Unit

Set whether to display the activity logo rather than the activity icon.

Unit
setElevation(elevation: Float)

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

Unit
setHideOffset(offset: Int)

Set the current hide offset of the action bar.

Unit
setHideOnContentScrollEnabled(hideOnContentScroll: Boolean)

Enable hiding the action bar on content scroll.

Unit

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

Unit

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

Unit

Set an alternate drawable to display next to the icon/logo/title when DISPLAY_HOME_AS_UP is enabled.

Unit

Set an alternate drawable to display next to the icon/logo/title when DISPLAY_HOME_AS_UP is enabled.

Unit

Enable or disable the "home" button in the corner of the action bar.

abstract Unit
setIcon(icon: Drawable!)

Set the icon to display in the 'home' section of the action bar.

abstract Unit

Set the icon to display in the 'home' section of the action bar.

abstract Unit

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Unit
setLogo(logo: Drawable!)

Set the logo to display in the 'home' section of the action bar.

abstract Unit

Set the logo to display in the 'home' section of the action bar.

abstract Unit

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

abstract Unit

This function is deprecated.

Action bar navigation modes are deprecated and not supported by inline toolbar action bars.

Unit

Set the ActionBar's split background.

Unit

Set the ActionBar's stacked background.

abstract Unit
setSubtitle(resId: Int)

Set the action bar's subtitle.

abstract Unit

Set the action bar's subtitle.

abstract Unit

Set the action bar's title.

abstract Unit

Set the action bar's title.

abstract Unit

Show the ActionBar if it is not currently showing.

Constants

DISPLAY_HOME_AS_UP

Added in 1.1.0
const val DISPLAY_HOME_AS_UP = 4: 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.

DISPLAY_SHOW_CUSTOM

Added in 1.1.0
const val DISPLAY_SHOW_CUSTOM = 16: Int

Show the custom view if one has been set.

DISPLAY_SHOW_HOME

Added in 1.1.0
const val DISPLAY_SHOW_HOME = 2: Int

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

DISPLAY_SHOW_TITLE

Added in 1.1.0
const val DISPLAY_SHOW_TITLE = 8: Int

Show the activity title and subtitle, if present.

DISPLAY_USE_LOGO

Added in 1.1.0
const val DISPLAY_USE_LOGO = 1: 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.

Added in 1.1.0
Deprecated in 1.1.0
const val NAVIGATION_MODE_LIST = 1: Int

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.

Added in 1.1.0
Deprecated in 1.1.0
const val NAVIGATION_MODE_STANDARD = 0: Int

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.

Added in 1.1.0
Deprecated in 1.1.0
const val NAVIGATION_MODE_TABS = 2: Int

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

Public constructors

ActionBar

Added in 1.1.0
ActionBar()

Public functions

addOnMenuVisibilityListener

Added in 1.1.0
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

Added in 1.1.0
Deprecated in 1.1.0
abstract fun addTab(tab: ActionBar.Tab!): Unit

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

Added in 1.1.0
Deprecated in 1.1.0
abstract fun addTab(tab: ActionBar.Tab!, position: Int): Unit

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

Added in 1.1.0
Deprecated in 1.1.0
abstract fun addTab(tab: ActionBar.Tab!, setSelected: Boolean): Unit

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

Added in 1.1.0
Deprecated in 1.1.0
abstract fun addTab(tab: ActionBar.Tab!, position: Int, setSelected: Boolean): Unit

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

Added in 1.1.0
abstract fun getCustomView(): View!
Returns
View!

The current custom view.

getDisplayOptions

Added in 1.1.0
abstract fun getDisplayOptions(): Int
Returns
Int

The current set of display options.

getElevation

Added in 1.1.0
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.

Returns
Float

Elevation value in pixels

getHeight

Added in 1.1.0
abstract fun getHeight(): Int

Retrieve the current height of the ActionBar.

Returns
Int

The ActionBar's height

getHideOffset

Added in 1.1.0
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).

Returns
Int

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

getNavigationItemCount

Added in 1.1.0
Deprecated in 1.1.0
abstract fun getNavigationItemCount(): Int

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

Returns
Int

Number of navigation items.

getNavigationMode

Added in 1.1.0
Deprecated in 1.1.0
abstract fun getNavigationMode(): Int

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

Returns
Int

The current navigation mode.

getSelectedNavigationIndex

Added in 1.1.0
Deprecated in 1.1.0
abstract fun getSelectedNavigationIndex(): Int

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

Returns
Int

Position of the selected item.

getSelectedTab

Added in 1.1.0
Deprecated in 1.1.0
abstract fun getSelectedTab(): ActionBar.Tab?

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

Returns
ActionBar.Tab?

The currently selected tab or null

getSubtitle

Added in 1.1.0
abstract fun getSubtitle(): CharSequence?

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

Returns
CharSequence?

The current ActionBar subtitle or null.

getTabAt

Added in 1.1.0
Deprecated in 1.1.0
abstract fun getTabAt(index: Int): ActionBar.Tab!

Returns the tab at the specified index.

Parameters
index: Int

Index value in the range 0-get

Returns
ActionBar.Tab!

getTabCount

Added in 1.1.0
Deprecated in 1.1.0
abstract fun getTabCount(): Int

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

Returns
Int

Tab count

getThemedContext

Added in 1.1.0
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.

Returns
Context!

A themed Context for creating views

getTitle

Added in 1.1.0
abstract fun getTitle(): CharSequence?

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

Returns
CharSequence?

The current ActionBar title or null.

hide

Added in 1.1.0
abstract fun hide(): Unit

Hide the ActionBar if it is currently showing. If the window hosting the ActionBar does not have the feature 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

Added in 1.1.0
fun isHideOnContentScrollEnabled(): Boolean

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

Returns
Boolean

true if hide-on-content-scroll is enabled

isShowing

Added in 1.1.0
abstract fun isShowing(): Boolean
Returns
Boolean

true if the ActionBar is showing, false otherwise.

newTab

Added in 1.1.0
Deprecated in 1.1.0
abstract fun newTab(): ActionBar.Tab!

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

Returns
ActionBar.Tab!

A new Tab

See also
addTab

removeAllTabs

Added in 1.1.0
Deprecated in 1.1.0
abstract fun removeAllTabs(): Unit

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

removeOnMenuVisibilityListener

Added in 1.1.0
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

Added in 1.1.0
Deprecated in 1.1.0
abstract fun removeTab(tab: ActionBar.Tab!): Unit

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

Added in 1.1.0
Deprecated in 1.1.0
abstract fun removeTabAt(position: Int): Unit

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

Added in 1.1.0
Deprecated in 1.1.0
abstract fun selectTab(tab: ActionBar.Tab!): Unit

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.

Parameters
tab: ActionBar.Tab!

Tab to select

setBackgroundDrawable

Added in 1.1.0
abstract fun setBackgroundDrawable(d: Drawable?): Unit

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

Parameters
d: Drawable?

Background drawable

setCustomView

Added in 1.1.0
abstract fun setCustomView(resId: Int): 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
resId: Int

Resource ID of a layout to inflate into the ActionBar.

setCustomView

Added in 1.1.0
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

Added in 1.1.0
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.

setDisplayHomeAsUpEnabled

Added in 1.1.0
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.

setDisplayOptions

Added in 1.1.0
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.

Parameters
options: Int

A combination of the bits defined by the DISPLAY_ constants defined in ActionBar.

setDisplayOptions

Added in 1.1.0
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.

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

Added in 1.1.0
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.

setDisplayShowHomeEnabled

Added in 1.1.0
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.

setDisplayShowTitleEnabled

Added in 1.1.0
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.

setDisplayUseLogoEnabled

Added in 1.1.0
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.

setElevation

Added in 1.1.0
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

Added in 1.1.0
fun setHideOffset(offset: Int): Unit

Set the current hide 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).

Parameters
offset: Int

The action bar's offset toward its fully hidden state in pixels.

setHideOnContentScrollEnabled

Added in 1.1.0
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

Added in 1.1.0
fun setHomeActionContentDescription(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.) 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 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

setHomeActionContentDescription

Added in 1.1.0
fun setHomeActionContentDescription(resId: @StringRes Int): 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.) 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 to indicate more specific functionality such as a sliding drawer, you should also set this to accurately describe the action.

Setting this to 0 will use the system default description.

Parameters
resId: @StringRes Int

Resource ID of a string to use as the new description for the Home action when enabled

setHomeAsUpIndicator

Added in 1.1.0
fun setHomeAsUpIndicator(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

setHomeAsUpIndicator

Added in 1.1.0
fun setHomeAsUpIndicator(resId: @DrawableRes Int): 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 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: @DrawableRes Int

Resource ID of a drawable to use for the up indicator, or null to use the theme's default

setHomeButtonEnabled

Added in 1.1.0
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

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

Added in 1.1.0
abstract fun setIcon(icon: Drawable!): 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
icon: Drawable!

Drawable to show as an icon.

setIcon

Added in 1.1.0
abstract fun setIcon(resId: @DrawableRes 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: @DrawableRes Int

Resource ID of a drawable to show as an icon.

setListNavigationCallbacks

Added in 1.1.0
Deprecated in 1.1.0
abstract fun setListNavigationCallbacks(
    adapter: SpinnerAdapter!,
    callback: ActionBar.OnNavigationListener!
): Unit

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

Added in 1.1.0
abstract fun setLogo(logo: Drawable!): 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
logo: Drawable!

Drawable to show as a logo.

setLogo

Added in 1.1.0
abstract fun setLogo(resId: @DrawableRes 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: @DrawableRes Int

Resource ID of a drawable to show as a logo.

setNavigationMode

Added in 1.1.0
Deprecated in 1.1.0
abstract fun setNavigationMode(mode: Int): Unit

Set the current navigation mode.

Parameters
mode: Int

The new mode to set.

setSelectedNavigationItem

Added in 1.1.0
Deprecated in 1.1.0
abstract fun setSelectedNavigationItem(position: Int): Unit

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

Parameters
position: Int

Position of the item to select.

setSplitBackgroundDrawable

Added in 1.1.0
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 uiOptions

Parameters
d: Drawable!

Background drawable for the split bar

setStackedBackgroundDrawable

Added in 1.1.0
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

Added in 1.1.0
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

setSubtitle

Added in 1.1.0
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

setTitle

Added in 1.1.0
abstract fun setTitle(resId: @StringRes Int): Unit

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

Parameters
resId: @StringRes Int

Resource ID of title string to set

setTitle

Added in 1.1.0
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

show

Added in 1.1.0
abstract fun show(): Unit

Show the ActionBar if it is not currently showing. If the window hosting the ActionBar does not have the feature 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.