belongs to Maven artifact androidx.transition:transition:1.0.0-alpha1

Transition.EpicenterCallback

public static abstract class Transition.EpicenterCallback
extends Object

java.lang.Object
   ↳ androidx.transition.Transition.EpicenterCallback


Class to get the epicenter of Transition. Use Transition.setEpicenterCallback(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.

Summary

Public constructors

Transition.EpicenterCallback()

Public methods

abstract Rect onGetEpicenter(Transition transition)

Implementers must override to return the epicenter of the Transition in screen coordinates.

Inherited methods

Public constructors

Transition.EpicenterCallback

Transition.EpicenterCallback ()

Public methods

onGetEpicenter

Rect onGetEpicenter (Transition transition)

Implementers must override to return the epicenter of the Transition in screen coordinates. Transitions like 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.

Parameters
transition Transition: The transition for which the epicenter applies.

Returns
Rect The Rect region of the epicenter of transition or null if there is no epicenter.