TransitionListener

Kotlin |Java

interface TransitionListener

androidx.transition.Transition.TransitionListener

Known Direct Subclasses TransitionListenerAdapter TransitionListenerAdapter This adapter class provides empty implementations of the methods from .

A transition listener receives notifications from a transition. Notifications indicate transition lifecycle events.

Summary

Public methods
abstract Unit	onTransitionCancel(@NonNull transition: Transition) Notification about the cancellation of the transition.
abstract Unit	onTransitionEnd(@NonNull transition: Transition) Notification about the end of the transition.
abstract Unit	onTransitionPause(@NonNull transition: Transition) Notification when a transition is paused.
abstract Unit	onTransitionResume(@NonNull transition: Transition) Notification when a transition is resumed.
abstract Unit	onTransitionStart(@NonNull transition: Transition) Notification about the start of the transition.

Public methods

onTransitionCancel

abstract fun onTransitionCancel(@NonNull transition: Transition): Unit

Notification about the cancellation of the transition. Note that cancel may be called by a parent TransitionSet on a child transition which has not yet started. This allows the child transition to restore state on target objects which was set at createAnimator() time.

Parameters
transition	Transition: The transition which was canceled.

onTransitionEnd

abstract fun onTransitionEnd(@NonNull transition: Transition): Unit

Notification about the end of the transition. Canceled transitions will always notify listeners of both the cancellation and end events. That is, onTransitionEnd(Transition) is always called, regardless of whether the transition was canceled or played through to completion.

Parameters
transition	Transition: The transition which reached its end.

onTransitionPause

abstract fun onTransitionPause(@NonNull transition: Transition): Unit

Notification when a transition is paused. Note that createAnimator() may be called by a parent TransitionSet on a child transition which has not yet started. This allows the child transition to restore state on target objects which was set at createAnimator() time.

Parameters
transition	Transition: The transition which was paused.

onTransitionResume

abstract fun onTransitionResume(@NonNull transition: Transition): Unit

Notification when a transition is resumed. Note that resume() may be called by a parent TransitionSet on a child transition which has not yet started. This allows the child transition to restore state which may have changed in an earlier call to onTransitionPause(Transition).

Parameters
transition	Transition: The transition which was resumed.

onTransitionStart

abstract fun onTransitionStart(@NonNull transition: Transition): Unit

Notification about the start of the transition.

Parameters
transition	Transition: The started transition.