Android APIs
public abstract class

ViewOutlineProvider

extends Object
java.lang.Object
   ↳ android.view.ViewOutlineProvider

Class Overview

Interface by which a View builds its Outline, used for shadow casting and clipping.

Summary

Fields
public static final ViewOutlineProvider BACKGROUND Default outline provider for Views, which queries the Outline from the View's background, or generates a 0 alpha, rectangular Outline the size of the View if a background isn't present.
public static final ViewOutlineProvider BOUNDS Maintains the outline of the View to match its rectangular bounds, at 1.0f alpha.
public static final ViewOutlineProvider PADDED_BOUNDS Maintains the outline of the View to match its rectangular padded bounds, at 1.0f alpha.
Public Constructors
ViewOutlineProvider()
Public Methods
abstract void getOutline(View view, Outline outline)
Called to get the provider to populate the Outline.
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Inherited Methods
From class java.lang.Object

Fields

public static final ViewOutlineProvider BACKGROUND

Added in API level 21

Default outline provider for Views, which queries the Outline from the View's background, or generates a 0 alpha, rectangular Outline the size of the View if a background isn't present.

public static final ViewOutlineProvider BOUNDS

Added in API level 21

Maintains the outline of the View to match its rectangular bounds, at 1.0f alpha. This can be used to enable Views that are opaque but lacking a background cast a shadow.

public static final ViewOutlineProvider PADDED_BOUNDS

Added in API level 21

Maintains the outline of the View to match its rectangular padded bounds, at 1.0f alpha. This can be used to enable Views that are opaque but lacking a background cast a shadow.

Public Constructors

public ViewOutlineProvider ()

Added in API level 21

Public Methods

public abstract void getOutline (View view, Outline outline)

Added in API level 21

Called to get the provider to populate the Outline. This method will be called by a View when its owned Drawables are invalidated, when the View's size changes, or if invalidateOutline() is called explicitly. The input outline is empty and has an alpha of 1.0f.

Parameters
view The view building the outline.
outline The empty outline to be populated.