popExit animation plays instead of exit animation [181142246]

Fixed

Bug

Status Update

No update yet.

Description

mi...@gmail.com

created issue #1

Feb 25, 2021 03:24AM

Component used: Fragment

Version used: 1.3.0

Devices/Android versions reproduced on: Pixel 3 XL Android 11

I am observing a case where popExit animation plays instead of exit animation. It happens in the following conditions:

There is only one fragment attached to the activity. (not using navigation components)
Pop this fragment and push a new fragment together.

When I debug the fragment library code, what I see is:

executePopOps(...) -> the OP_ADD case sets nextAnim to popExit -> removeFragment(f) -> setVisibleRemovingFragment(...)
The fragment container sets the current fragment as visible_removing_fragment_view_tag fragment with popExit animation.

Sample project: https://github.com/mkano9/material-container-transform-recycleChildrenOnDetach/tree/popexit-and-exit-reversed

Video attached.

20210224_190258.mp4

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Comments

il...@google.com <il...@google.com> Feb 26, 2021 08:06PM

Assigned to jb...@google.com.

jb...@google.com <jb...@google.com> #2Mar 4, 2021 02:14AM

This is an issue with Animations/Animators that has been present in fragments since before 1.3.0. Fragment transitions don't suffer from these problems and I would suggest using them instead in this particular use case. Specifically, instead of using setCustomAnimations() you can call the following in the onCreate() of your fragment:

enterTransition = Slide().apply {
    slideEdge = Gravity.END
}
exitTransition = Slide().apply {
    slideEdge = Gravity.START
}

ap...@google.com <ap...@google.com> #3Mar 13, 2021 01:29AM

Project: platform/frameworks/support
Branch: androidx-main

commit 4c702a921f39729d3d8e5af981a787c25b195ff1
Author: Jeremy Woods <jbwoods@google.com>
Date: Fri Mar 12 15:43:49 2021

Ensure fragments animate in the same direction

When using the new state manager, the last fragment operation should
always determine the direction of the special effects. So if the
transactions are forward -> forward -> pop, the special effects should
all be pop type since the last transaction was a pop.

RelNote: "When running both `popBackStack()` and `commit()` operations
together, the last operation will now set the direction for all
animations rather than running some pop animations and some enter
animations."
Test: removePopExitAnimation
Bug: 181142246

Change-Id: I7072e2c8008318ae812ae461a42ddafbbe6055cd

M fragment/fragment/src/androidTest/java/androidx/fragment/app/FragmentAnimationTest.kt
M fragment/fragment/src/main/java/androidx/fragment/app/BackStackRecord.java
M fragment/fragment/src/main/java/androidx/fragment/app/DefaultSpecialEffectsController.java
M fragment/fragment/src/main/java/androidx/fragment/app/Fragment.java
M fragment/fragment/src/main/java/androidx/fragment/app/FragmentAnim.java
M fragment/fragment/src/main/java/androidx/fragment/app/FragmentManager.java

https://android-review.googlesource.com/1628871

jb...@google.com <jb...@google.com> #4Mar 15, 2021 07:18PM

Marked as fixed.

This has been fixed internally and will be available in the Fragment 1.3.2 release.

el...@gmail.com <el...@gmail.com> #5Mar 29, 2021 02:59PM

Hi,

Changes in 1.3.2 seems to create issues when using a navController. In our app we navigate between fragments like this:

findMasterNavController().navigate(Uri.parse(deepLink), NavOptions.Builder().setEnterAnim(R.anim.enter_left)
        .setExitAnim(R.anim.exit_right)
        .setPopEnterAnim(R.anim.enter_right)
        .setPopExitAnim(R.anim.exit_left)
        .build())

Then when pressing the back button, the exit anim isn't played.

Cheers,

il...@google.com <il...@google.com> #6Mar 29, 2021 03:11PM

Re #5 - please file a new bug with a sample project that reproduces your issue.

pr...@gmail.com <pr...@gmail.com> #7Mar 30, 2021 06:19AM

Re #6 I am also facing same issue exit animations does not work even if i set it from navigation graph and using Direction Classes

el...@gmail.com <el...@gmail.com> #8Mar 30, 2021 08:38AM

#6, seems someone already did it: https://issuetracker.google.com/issues/183877426

jo...@gmail.com <jo...@gmail.com> #9Apr 8, 2021 09:40PM

Same issue here with navController not playing the exit animations properly any longer.