High level:
- As you swipe up from an app (OtherActivityInputConsumer),
a state transition animation to All Apps is created in
AnimatorControllerWithResistance. The animation is played
alongside the Recents resistance animation (i.e. past the
settling point of Overview, which is at mCurrentShift 1).
- The actual state transition to All Apps only happens if you
release your finger in the "all apps region." This is set to
mCurrentShift 2, so double the distance that Overview rests.
- A haptic plays whenever you enter or exit this region, and
the all apps animation is set to 0 until the region is
active. This is so it's clear that something different is
happening.
- The panel that was previously used for tablets is now used
for phones during this transition. It comes in at full
opacity when you enter the region, and the contents (apps
and search suggestions) fade in as you continue swiping.
- The only gesture that is recognized in the all apps region
is a fling downwards, which will return you to the previous
app. Otherwise a left/right/up fling or slow release will
finish the all apps transition.
- The threshold is ignored if the flag is disabled (default)
or if FallbackActivityInterface is active.
Flag:
The threshold is ignored if ENABLE_ALL_APPS_FROM_OVERVIEW is
disabled (default).
Bug: 259619990
Bug: 275132633
Test: Manual with and without the flag enabled
Change-Id: Ie311b77252416d97677b2c56fad61dfd392b6fe8
