commit 552071b5f4af63dd6387526f283eadbb92413ff3
author Kevin <kevhan@google.com> Fri Mar 29 17:40:31 2019 -0700
committer Kevin <kevhan@google.com> Mon Apr 01 13:00:57 2019 -0700
tree be97330ec816fa83b8b2688b4e7d8e672e406f03
parent 7f5083b7af85398f710ebc48a8a8c1b3d9db5421

Boost correct layer for Recents Go transition

For transition from app to fallback recents, the apps were on the same
Z-layer causing both to show up in the animation. We should instead
boost the closing app so that it's visually on top as it shrinks down.

Bug: 114136250
Test: Press overview in app to go to recents, behaves as expected
Change-Id: Iaca1e4fc1486721468a5bfffb1d139259d48739f

go/quickstep/src/com/android/quickstep/AppToOverviewAnimationProvider.java

diff --git a/go/quickstep/src/com/android/quickstep/AppToOverviewAnimationProvider.java b/go/quickstep/src/com/android/quickstep/AppToOverviewAnimationProvider.java
index 051c80f..d1d697c 100644
--- a/go/quickstep/src/com/android/quickstep/AppToOverviewAnimationProvider.java
+++ b/go/quickstep/src/com/android/quickstep/AppToOverviewAnimationProvider.java
@@ -173,8 +173,10 @@
 
         // Keep recents visible throughout the animation.
         SurfaceParams[] params = new SurfaceParams[2];
+        // Closing app should stay on top.
+        int boostedMode = MODE_CLOSING;
         params[0] = new SurfaceParams(recentsTarget.leash, 1f, null /* matrix */,
-                null /* windowCrop */, getLayer(recentsTarget, MODE_OPENING), 0 /* cornerRadius */);
+                null /* windowCrop */, getLayer(recentsTarget, boostedMode), 0 /* cornerRadius */);
 
         valueAnimator.addUpdateListener(new MultiValueUpdateListener() {
             private final FloatProp mScaleX;
@@ -214,7 +216,7 @@
                 m.postTranslate(mTranslationX.value, mTranslationY.value);
 
                 params[1] = new SurfaceParams(appTarget.leash, mAlpha.value, m,
-                        null /* windowCrop */, getLayer(appTarget, MODE_CLOSING),
+                        null /* windowCrop */, getLayer(appTarget, boostedMode),
                         0 /* cornerRadius */);
                 surfaceApplier.scheduleApply(params);
             }