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-rw-r--r--services/core/java/com/android/server/wm/StackTapPointerEventListener.java1
1 files changed, 1 insertions, 0 deletions
diff --git a/services/core/java/com/android/server/wm/StackTapPointerEventListener.java b/services/core/java/com/android/server/wm/StackTapPointerEventListener.java
index 7573400..80eb453 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;