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il...@google.com
ap...@google.com
Project: platform/frameworks/support
Branch: androidx-master-dev
commit b55fe68edc02b253b908a1c7c2e98350ba67afe4
Author: Ian Lake <ilake@google.com>
Date: Wed Aug 12 14:21:57 2020
Ignore Animations/Animator when Transitions run
For a given Fragment, a single owner for its
transition from visible to non-visible is needed
to avoid conflicts as different systems try to
influence the same set of properties.
This has two consequences:
- Animations (which work at the parent container level)
will interfere if there are *any* Transitions run.
- Animators will interfere if there are any Transitions
run on that specific Fragment.
By tracking which Transitions were started and using
that information to selectively ignore conflicting
Animations/Animators, we can avoid visual artifacts.
Test: updated tests pass
BUG: 149569323
Change-Id: I9e5169ffd36853c3dfbd7f217837a74674a9508d
M fragment/fragment/src/androidTest/java/androidx/fragment/app/FragmentTransitionAnimTest.kt
M fragment/fragment/src/main/java/androidx/fragment/app/DefaultSpecialEffectsController.java
https://android-review.googlesource.com/1398530
Branch: androidx-master-dev
commit b55fe68edc02b253b908a1c7c2e98350ba67afe4
Author: Ian Lake <ilake@google.com>
Date: Wed Aug 12 14:21:57 2020
Ignore Animations/Animator when Transitions run
For a given Fragment, a single owner for its
transition from visible to non-visible is needed
to avoid conflicts as different systems try to
influence the same set of properties.
This has two consequences:
- Animations (which work at the parent container level)
will interfere if there are *any* Transitions run.
- Animators will interfere if there are any Transitions
run on that specific Fragment.
By tracking which Transitions were started and using
that information to selectively ignore conflicting
Animations/Animators, we can avoid visual artifacts.
Test: updated tests pass
BUG: 149569323
Change-Id: I9e5169ffd36853c3dfbd7f217837a74674a9508d
M fragment/fragment/src/androidTest/java/androidx/fragment/app/FragmentTransitionAnimTest.kt
M fragment/fragment/src/main/java/androidx/fragment/app/DefaultSpecialEffectsController.java
il...@google.com
There are two parallel systems in Android - the Animation system and the Animator system (which the Transition system is built on top of). With this change and Fragment 1.3.0-alpha08, no Animation will run if there are any Transitions kicked off at the same time and no Animator will run on Fragments that have Transitions directly associated with them (either via an enter/exit transition or as part of a shared element transition).
ap...@google.com
Project: platform/frameworks/support
Branch: androidx-master-dev
commit fa55358f7f2870bf05ef5cce12d2b4e2d86732aa
Author: Ian Lake <ilake@google.com>
Date: Mon Sep 14 11:30:52 2020
Ignore Animations when Animators run
As a continuation of the work in
we now prioritize running Animators over running
Animations. This avoids cases where both are
running simultaneously.
As Animations and Animators are now properly
decoupled, we can use animator.cancel() when
our CancelationSignal is triggered instead of
using clearAnimation().
Test: all tests pass, updated FragmentAnimatorTest passes
BUG: 167579557
Change-Id: I7b3f5c1cc1355e02ff770838cb485d659dfb1619
M fragment/fragment/src/androidTest/java/androidx/fragment/app/FragmentAnimatorTest.kt
M fragment/fragment/src/main/java/androidx/fragment/app/DefaultSpecialEffectsController.java
https://android-review.googlesource.com/1427449
Branch: androidx-master-dev
commit fa55358f7f2870bf05ef5cce12d2b4e2d86732aa
Author: Ian Lake <ilake@google.com>
Date: Mon Sep 14 11:30:52 2020
Ignore Animations when Animators run
As a continuation of the work in
we now prioritize running Animators over running
Animations. This avoids cases where both are
running simultaneously.
As Animations and Animators are now properly
decoupled, we can use animator.cancel() when
our CancelationSignal is triggered instead of
using clearAnimation().
Test: all tests pass, updated FragmentAnimatorTest passes
BUG: 167579557
Change-Id: I7b3f5c1cc1355e02ff770838cb485d659dfb1619
M fragment/fragment/src/androidTest/java/androidx/fragment/app/FragmentAnimatorTest.kt
M fragment/fragment/src/main/java/androidx/fragment/app/DefaultSpecialEffectsController.java
Description
Fragments do not stop you from running both Transitions and Animations at the same time.
Combining both of them on the same Fragment can result in unexpected visual behavior such as the transition and animation blending in unusual ways.
Regardless of which one you choose, there is a way to execute all of the visual effects possible with one that you can do with both (only transitions can do shared elements), so having them together is not needed.
If you set a transition on the fragment itself, it should override whatever animation is set on the transaction.