public abstract class ViewOutlineProvider
extends Object
java.lang.Object | |
↳ | android.view.ViewOutlineProvider |
Interface by which a View builds its Outline
, used for shadow casting and clipping.
Fields |
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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 |
public static final ViewOutlineProvider |
PADDED_BOUNDS Maintains the outline of the View to match its rectangular padded bounds, at |
Public constructors |
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ViewOutlineProvider() |
Public methods |
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abstract void |
getOutline(View view, Outline outline) Called to get the provider to populate the Outline. |
Inherited methods |
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![]() java.lang.Object
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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.
See also:
ViewOutlineProvider BOUNDS
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.
ViewOutlineProvider PADDED_BOUNDS
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.
void getOutline (View view, Outline outline)
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 | |
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view |
View : The view building the outline. |
outline |
Outline : The empty outline to be populated. |