Fade

public class Fade
extends Visibility

java.lang.Object
   ↳ androidx.transition.Transition
     ↳ androidx.transition.Visibility
       ↳ androidx.transition.Fade


This transition tracks changes to the visibility of target views in the start and end scenes and fades views in or out when they become visible or non-visible. Visibility is determined by both the View.setVisibility(int) state of the view as well as whether it is parented in the current view hierarchy.

The ability of this transition to fade out a particular view, and the way that that fading operation takes place, is based on the situation of the view in the view hierarchy. For example, if a view was simply removed from its parent, then the view will be added into a ViewGroupOverlay while fading. If a visible view is changed to be View.GONE or View.INVISIBLE, then the visibility will be changed to View.VISIBLE for the duration of the animation. However, if a view is in a hierarchy which is also altering its visibility, the situation can be more complicated. In general, if a view that is no longer in the hierarchy in the end scene still has a parent (so its parent hierarchy was removed, but it was not removed from its parent), then it will be left alone to avoid side-effects from improperly removing it from its parent. The only exception to this is if the previous Scene was created from a layout resource file, then it is considered safe to un-parent the starting scene view in order to fade it out.

A Fade transition can be described in a resource file by using the tag fade, along with the standard attributes of Fade and Transition.

Summary

Constants

int IN

Fading mode used in Fade(int) to make the transition operate on targets that are appearing.

int OUT

Fading mode used in Fade(int) to make the transition operate on targets that are disappearing.

Inherited constants

Public constructors

Fade(int fadingMode)

Constructs a Fade transition that will fade targets in and/or out, according to the value of fadingMode.

Fade()

Constructs a Fade transition that will fade targets in and out.

Fade(Context context, AttributeSet attrs)

Public methods

void captureStartValues(TransitionValues transitionValues)

Captures the values in the start scene for the properties that this transition monitors.

Animator onAppear(ViewGroup sceneRoot, View view, TransitionValues startValues, TransitionValues endValues)

The default implementation of this method returns a null Animator.

Animator onDisappear(ViewGroup sceneRoot, View view, TransitionValues startValues, TransitionValues endValues)

The default implementation of this method returns a null Animator.

Inherited methods