From 1310e094b5430c6e1eb59fbff386d5fac4013460 Mon Sep 17 00:00:00 2001
From: Winson Chung <winsonc@google.com>
Date: Wed, 29 Nov 2017 14:36:12 -0800
Subject: Adding pointer index check to recents touch handler.

- Also fix issue with wrong pointer index used to update last
  position when pointer changes

Bug: 65030830
Test: Manual - multitouch in recents
Change-Id: I75249594f48619b123b79e0188a0dc05a52b5416
---
 .../com/android/systemui/recents/views/TaskStackViewTouchHandler.java  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
index bfaa8cdb8e27..c91cdfc379c4 100644
--- a/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
+++ b/packages/SystemUI/src/com/android/systemui/recents/views/TaskStackViewTouchHandler.java
@@ -256,6 +256,9 @@ class TaskStackViewTouchHandler implements SwipeHelper.Callback {
             }
             case MotionEvent.ACTION_MOVE: {
                 int activePointerIndex = ev.findPointerIndex(mActivePointerId);
+                if (activePointerIndex == -1) {
+                    break;
+                }
                 int y = (int) ev.getY(activePointerIndex);
                 int x = (int) ev.getX(activePointerIndex);
                 if (!mIsScrolling) {
-- 
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