public abstract static class Transition.EpicenterCallback extends Object
Transition.setEpicenterCallback(android.transition.Transition.EpicenterCallback)
to
set the callback used to calculate the epicenter of the Transition. Override
Transition.getEpicenter()
to return the rectangular region in screen coordinates of
the epicenter of the transition.Constructor and Description |
---|
EpicenterCallback() |
Modifier and Type | Method and Description |
---|---|
abstract Rect |
onGetEpicenter(Transition transition)
Implementers must override to return the epicenter of the Transition in screen
coordinates.
|
public abstract Rect onGetEpicenter(Transition transition)
Explode
depend upon
an epicenter for the Transition. In Explode, Views move toward or away from the
center of the epicenter Rect along the vector between the epicenter and the center
of the View appearing and disappearing. Some Transitions, such as
Fade
pay no attention to the epicenter.transition
- The transition for which the epicenter applies.transition
or null if
there is no epicenter.