Fix for transition layout suppression
The ChangeBounds transition causes its target view parents to suppress
layout for the duration of the transition. This is done to avoid artifacts
caused by running layout while layout bounds are being animated between
different scene values.
In order to react correctly to new transition/scene information (such as
running a new transition while another is already running), the transition
system calls pause() on all running transitions to allow layout (among other
things) to work correctly, then resume() after this is finished. This works
in general, but pause/resume do not take account of child transitions that
have already played and ended. ChangeBounds, uses pause/resume to
restore normal layout and re-enable layout suppression. This means that
when resume() is called on a ChangeBounds transition that has already
ended, that transition will leave the parent in a suppressed-layout
state, basically forever. This can cause artifacts like we're seeing in
recent ActionBar changes where the account spinner is never repopulated because
layout is never allowed to run.
The fix is to note when a transition ends and noop future calls to pause/resume.
Issue #10648936 Transitions don't work with new ActionBar functionality
Change-Id: Id9d41c0352b2270d46cfd5ad4dba130767bbf303
1 file changed