tree 73b9bf783c27d83da6ae4ba0b2dded1868d24ae2
parent 99483fa82bb17c4aaaaf7920affeaab501bdc803
author Sally <sallyyuen@google.com> 1646678345 +0000
committer Sally <sallyyuen@google.com> 1646947397 +0000

Add API to read and listen to duration scale changes for animations

Developers and accessibility services can remove animations by
changing the duration scale to zero. Physics-based animation
libraries like AndroidX's dynamic animations aren't duration-based,
but they need to know the duration scale to remove animations.

Expose the scale through ValueAnimator to avoid requests for
Context which may not be fulfilled by the developer.

Unhide test API getDurationScale and handle callbacks on the main
thread.

Test: atest ValueAnimatorTest
Bug: 221303983
Change-Id: I3134e0bf007df046a9a2aa0f9d866c27c7989e68