Added in API level 14

Summary: Nested Classes | Ctors | Methods | Inherited Methods

ActionProvider

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Kotlin |Java

public abstract class ActionProvider
extends Object

java.lang.Object
↳	android.view.ActionProvider

Known direct subclasses MediaRouteActionProvider, ShareActionProvider MediaRouteActionProvider The media route action provider displays a media route button in the application's ActionBar to allow the user to select routes and to control the currently selected route.  ShareActionProvider This is a provider for a share action.

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An ActionProvider defines rich menu interaction in a single component. ActionProvider can generate action views for use in the action bar, dynamically populate submenus of a MenuItem, and handle default menu item invocations.

An ActionProvider can be optionally specified for a MenuItem and will be responsible for creating the action view that appears in the ActionBar in place of a simple button in the bar. When the menu item is presented in a way that does not allow custom action views, (e.g. in an overflow menu,) the ActionProvider can perform a default action.

There are two ways to use an action provider:

• Set the action provider on a MenuItem directly by calling MenuItem.setActionProvider(ActionProvider).
• Declare the action provider in an XML menu resource. For example:

   
     <item android:id="@+id/my_menu_item"
       android:title="Title"
       android:icon="@drawable/my_menu_item_icon"
       android:showAsAction="ifRoom"
       android:actionProviderClass="foo.bar.SomeActionProvider" />
   
   

See also:

• MenuItem.setActionProvider(ActionProvider)
• MenuItem.getActionProvider()

Summary

Nested classes
interface	ActionProvider.VisibilityListener Listens to changes in visibility as reported by ActionProvider.refreshVisibility().

Public constructors
ActionProvider(Context context) Creates a new instance.

Public methods
boolean	hasSubMenu() Determines if this ActionProvider has a submenu associated with it.
boolean	isVisible() If overridesItemVisibility() returns true, the return value of this method will help determine the visibility of the MenuItem this ActionProvider is bound to.
abstract View	onCreateActionView() This method was deprecated in API level 16. use onCreateActionView(android.view.MenuItem)
View	onCreateActionView(MenuItem forItem) Factory method called by the Android framework to create new action views.
boolean	onPerformDefaultAction() Performs an optional default action.
void	onPrepareSubMenu(SubMenu subMenu) Called to prepare an associated submenu for the menu item backed by this ActionProvider.
boolean	overridesItemVisibility() The result of this method determines whether or not isVisible() will be used by the MenuItem this ActionProvider is bound to help determine its visibility.
void	refreshVisibility() If this ActionProvider is associated with an item in a menu, refresh the visibility of the item based on overridesItemVisibility() and isVisible().
void	setVisibilityListener(ActionProvider.VisibilityListener listener) Set a listener to be notified when this ActionProvider's overridden visibility changes.

Inherited methods

From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

ActionProvider

Added in API level 14

public ActionProvider (Context context)

Creates a new instance. ActionProvider classes should always implement a constructor that takes a single Context parameter for inflating from menu XML.

Parameters
context	Context: Context for accessing resources. This value cannot be null.

Public methods

hasSubMenu

Added in API level 14

public boolean hasSubMenu ()

Determines if this ActionProvider has a submenu associated with it.

Associated submenus will be shown when an action view is not. This provider instance will receive a call to onPrepareSubMenu(android.view.SubMenu) after the call to onPerformDefaultAction() and before a submenu is displayed to the user.

Returns
boolean	true if the item backed by this provider should have an associated submenu

isVisible

Added in API level 16

public boolean isVisible ()

If overridesItemVisibility() returns true, the return value of this method will help determine the visibility of the MenuItem this ActionProvider is bound to.

If the MenuItem's visibility is explicitly set to false by the application, the MenuItem will not be shown, even if this method returns true.

Returns
boolean	true if the MenuItem this ActionProvider is bound to is visible, false if it is invisible. The default implementation returns true.

onCreateActionView

Added in API level 14
Deprecated in API level 16

public abstract View onCreateActionView ()

This method was deprecated in API level 16.
use onCreateActionView(android.view.MenuItem)

Factory method called by the Android framework to create new action views.

This method has been deprecated in favor of onCreateActionView(android.view.MenuItem). Newer apps that wish to support platform versions prior to API 16 should also implement this method to return a valid action view.

Returns
View	A new action view. This value cannot be null.

onCreateActionView

Added in API level 16

public View onCreateActionView (MenuItem forItem)

Factory method called by the Android framework to create new action views. This method returns a new action view for the given MenuItem.

If your ActionProvider implementation overrides the deprecated no-argument overload onCreateActionView(), overriding this method for devices running API 16 or later is recommended but optional. The default implementation calls onCreateActionView() for compatibility with applications written for older platform versions.

Parameters
forItem	MenuItem: MenuItem to create the action view for This value cannot be null.

Returns
View	the new action view This value cannot be null.

onPerformDefaultAction

Added in API level 14

public boolean onPerformDefaultAction ()

Performs an optional default action.

For the case of an action provider placed in a menu item not shown as an action this method is invoked if previous callbacks for processing menu selection has handled the event.

A menu item selection is processed in the following order:

• Receiving a call to MenuItem.OnMenuItemClickListener.onMenuItemClick.
• Receiving a call to Activity.onOptionsItemSelected(MenuItem)
• Receiving a call to Fragment.onOptionsItemSelected(MenuItem)
• Launching the Intent set via MenuItem.setIntent(android.content.Intent)
• Invoking this method.

The default implementation does not perform any action and returns false.

Returns
boolean

onPrepareSubMenu

Added in API level 14

public void onPrepareSubMenu (SubMenu subMenu)

Called to prepare an associated submenu for the menu item backed by this ActionProvider.

if hasSubMenu() returns true, this method will be called when the menu item is selected to prepare the submenu for presentation to the user. Apps may use this to create or alter submenu content right before display.

Parameters
subMenu	SubMenu: Submenu that will be displayed This value cannot be null.

overridesItemVisibility

Added in API level 16

public boolean overridesItemVisibility ()

The result of this method determines whether or not isVisible() will be used by the MenuItem this ActionProvider is bound to help determine its visibility.

Returns
boolean	true if this ActionProvider overrides the visibility of the MenuItem it is bound to, false otherwise. The default implementation returns false.

See also:

• isVisible()

refreshVisibility

Added in API level 16

public void refreshVisibility ()

If this ActionProvider is associated with an item in a menu, refresh the visibility of the item based on overridesItemVisibility() and isVisible(). If overridesItemVisibility() returns false, this call will have no effect.

setVisibilityListener

Added in API level 16

public void setVisibilityListener (ActionProvider.VisibilityListener listener)

Set a listener to be notified when this ActionProvider's overridden visibility changes. This should only be used by MenuItem implementations.

Parameters
listener	ActionProvider.VisibilityListener: listener to set This value may be null.