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 | |
|---|---|
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 | |
|---|---|
ViewOutlineProvider()
|
|
Public methods | |
|---|---|
abstract
void
|
getOutline(View view, Outline outline)
Called to get the provider to populate the Outline. |
Inherited methods | |
|---|---|
java.lang.Object
| |
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 | |
|---|---|
view |
View:
The view building the outline. |
outline |
Outline:
The empty outline to be populated.
|