From 181968b87ba7557281d1d5dbb13d2c5012c1dc9c Mon Sep 17 00:00:00 2001
From: Tony Wickham <twickham@google.com>
Date: Thu, 3 May 2018 12:50:05 -0700
Subject: [PATCH] Don't crash if getWidth is 0

Bug: 79203256
Change-Id: I3f91adbda40931e882c4f768794a0d803730805e
---
 .../com/android/quickstep/WindowTransformSwipeHandler.java | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
index 027f2e9df9..2c5a385636 100644
--- a/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
+++ b/quickstep/src/com/android/quickstep/WindowTransformSwipeHandler.java
@@ -780,7 +780,12 @@ public class WindowTransformSwipeHandler<T extends BaseDraggingActivity> {
             int scrollForSecondTask = mRecentsView.getChildCount() > 1
                     ? mRecentsView.getScrollForPage(1) : scrollForFirstTask;
             int offsetFromFirstTask = scrollForFirstTask - scrollForSecondTask;
-            float interpolation = offsetFromFirstTask / (mRecentsView.getWidth() / 2);
+            final float interpolation;
+            if (mRecentsView.getWidth() == 0) {
+                interpolation = scrollForSecondTask == scrollForFirstTask ? 0 : 1;
+            } else {
+                interpolation = (float) offsetFromFirstTask / (mRecentsView.getWidth() / 2);
+            }
             mClipAnimationHelper.offsetTarget(
                     firstTask.getCurveScaleForInterpolation(interpolation), offsetFromFirstTask,
                     mActivityControlHelper.getTranslationYForQuickScrub(mActivity));