From 4f65ca0f763eecf5521c56986a2b325d32544a37 Mon Sep 17 00:00:00 2001
From: tingna_sung <tingna_sung@htc.com>
Date: Sat, 25 Oct 2014 21:52:47 +0800
Subject: [PATCH] Fix pointer index out of range exception

Avoid pointer index out of range error if return value is -1 of
findPointerIndex() when there is no data available for that pointer
identifier.

Change-Id: I2a08f04c678164e220852094baa124ba157e2e42
Signed-off-by: tingna_sung <tingna_sung@htc.com>
---
 .../java/com/android/server/wm/StackTapPointerEventListener.java | 1 +
 1 file changed, 1 insertion(+)

diff --git a/services/core/java/com/android/server/wm/StackTapPointerEventListener.java b/services/core/java/com/android/server/wm/StackTapPointerEventListener.java
index 75734002dbc94..80eb453cdfeab 100644
--- a/services/core/java/com/android/server/wm/StackTapPointerEventListener.java
+++ b/services/core/java/com/android/server/wm/StackTapPointerEventListener.java
@@ -57,6 +57,7 @@ public class StackTapPointerEventListener implements PointerEventListener {
                 if (mPointerId >= 0) {
                     int index = motionEvent.findPointerIndex(mPointerId);
                     if ((motionEvent.getEventTime() - motionEvent.getDownTime()) > TAP_TIMEOUT_MSEC
+                            || index < 0
                             || Math.abs(motionEvent.getX(index) - mDownX) > mMotionSlop
                             || Math.abs(motionEvent.getY(index) - mDownY) > mMotionSlop) {
                         mPointerId = -1;