ActionBar

public abstract class ActionBar
extends Object

java.lang.Object
↳	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 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 AppCompatActivity.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 classes
class	ActionBar.LayoutParams Per-child layout information associated with action bar custom views.
interface	ActionBar.OnMenuVisibilityListener Listener for receiving events when action bar menus are shown or hidden.
interface	ActionBar.OnNavigationListener This interface is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
class	ActionBar.Tab This class is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
interface	ActionBar.TabListener This interface is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Constants
int	DISPLAY_HOME_AS_UP Display the 'home' element such that it appears as an 'up' affordance.
int	DISPLAY_SHOW_CUSTOM Show the custom view if one has been set.
int	DISPLAY_SHOW_HOME Show 'home' elements in this action bar, leaving more space for other navigation elements.
int	DISPLAY_SHOW_TITLE Show the activity title and subtitle, if present.
int	DISPLAY_USE_LOGO Use logo instead of icon if available.
int	NAVIGATION_MODE_LIST This constant is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
int	NAVIGATION_MODE_STANDARD This constant is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
int	NAVIGATION_MODE_TABS This constant is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.

Public constructors
ActionBar()

Public methods
abstract void	addOnMenuVisibilityListener(ActionBar.OnMenuVisibilityListener listener) Add a listener that will respond to menu visibility change events.
abstract void	addTab(ActionBar.Tab tab, boolean setSelected) This method is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
abstract void	addTab(ActionBar.Tab tab) This method is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
abstract void	addTab(ActionBar.Tab tab, int position) This method is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
abstract void	addTab(ActionBar.Tab tab, int position, boolean setSelected) This method is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
abstract View	getCustomView()
abstract int	getDisplayOptions()
float	getElevation() Get the Z-axis elevation of the action bar in pixels.
abstract int	getHeight() Retrieve the current height of the ActionBar.
int	getHideOffset() Return the current vertical offset of the action bar.
abstract int	getNavigationItemCount() This method is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
abstract int	getNavigationMode() This method is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns instead.
abstract int	getSelectedNavigationIndex() This method is deprecated. Action bar navigation modes are deprecated and not supported by inline toolbar action bars. Consider using other common navigation patterns</