From 4f67be7bfa257549989cfa53a33d357588c15a33 Mon Sep 17 00:00:00 2001
From: Lucas Dupin <dupin@google.com>
Date: Mon, 29 May 2017 11:30:29 -0700
Subject: [PATCH] Avoid pixel rounding issue during animation

Bug: 38146787
Test: visual
Change-Id: I9f758f4163cdf9ba8e3ea27ef153d2f025fc795b
---
 .../statusbar/stack/NotificationStackScrollLayout.java       | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
index 431f646163f5c..c8af4c863a5f9 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/stack/NotificationStackScrollLayout.java
@@ -2220,14 +2220,15 @@ public class NotificationStackScrollLayout extends ViewGroup
         ActivatableNotificationView firstView = mFirstVisibleBackgroundChild;
         int top = 0;
         if (firstView != null) {
-            int finalTranslationY = (int) ViewState.getFinalTranslationY(firstView);
+            // Round Y up to avoid seeing the background during animation
+            int finalTranslationY = (int) Math.ceil(ViewState.getFinalTranslationY(firstView));
             if (mAnimateNextBackgroundTop
                     || mTopAnimator == null && mCurrentBounds.top == finalTranslationY
                     || mTopAnimator != null && mEndAnimationRect.top == finalTranslationY) {
                 // we're ending up at the same location as we are now, lets just skip the animation
                 top = finalTranslationY;
             } else {
-                top = (int) firstView.getTranslationY();
+                top = (int) Math.ceil(firstView.getTranslationY());
             }
         }
         ActivatableNotificationView lastView = mShelf.hasItemsInStableShelf()