commit 94ab3eee48c4c95f55550f0a3b1ce5097906a363
author Vadim Tryshev <vadimt@google.com> Fri Apr 27 19:20:34 2018 -0700
committer Vadim Tryshev <vadimt@google.com> Fri Apr 27 20:02:38 2018 -0700
tree a893103b6ee25d3ff712f63249c076131b7fa85d
parent cbebaa19f992bf55c1f4d6d57e3a21c71f5ee013

Alpha-optimizing Clear All button.

Similar approach is used for its sister buttons in System UI
(like id/dismiss_text which is
"FooterViewButton extends AlphaOptimizedButton").

Bug: 72222505
Test: Manual
Change-Id: Ibb8157bfbf2bf9cddb501c1e80fb9c7c79bb694b

quickstep/src/com/android/quickstep/views/RecentsViewContainer.java

diff --git a/quickstep/src/com/android/quickstep/views/RecentsViewContainer.java b/quickstep/src/com/android/quickstep/views/RecentsViewContainer.java
index 7b7dbba..15925b5 100644
--- a/quickstep/src/com/android/quickstep/views/RecentsViewContainer.java
+++ b/quickstep/src/com/android/quickstep/views/RecentsViewContainer.java
@@ -12,7 +12,6 @@
 import android.view.View;
 
 import com.android.launcher3.InsettableFrameLayout;
-import com.android.launcher3.Launcher;
 import com.android.launcher3.R;
 
 public class RecentsViewContainer extends InsettableFrameLayout {
@@ -54,6 +53,7 @@
                 (InsettableFrameLayout.LayoutParams) mClearAllButton.getLayoutParams();
         params.gravity = Gravity.TOP | (RecentsView.FLIP_RECENTS ? Gravity.START : Gravity.END);
         mClearAllButton.setLayoutParams(params);
+        mClearAllButton.forceHasOverlappingRendering(false);
         mRecentsView.setClearAllButton(mClearAllButton);
     }