Fix possible crash in System UI

Fixes bug 11215581

Change-Id: Ic76ad783729316539e8e57feb098d6e823b4ecdf

1 files changed, 3 insertions, 0 deletions

diff --git a/packages/Keyguard/src/com/android/keyguard/PagedView.java b/packages/Keyguard/src/com/android/keyguard/PagedView.java
index 23488d44a6e3..9d31ab00c7c5 100644
--- a/packages/Keyguard/src/com/android/keyguard/PagedView.java
+++ b/packages/Keyguard/src/com/android/keyguard/PagedView.java
@@ -1553,6 +1553,9 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
             if (mTouchState == TOUCH_STATE_SCROLLING) {
                 final int activePointerId = mActivePointerId;
                 final int pointerIndex = ev.findPointerIndex(activePointerId);
+
+                if (pointerIndex == -1) return true;
+
                 final float x = ev.getX(pointerIndex);
                 final VelocityTracker velocityTracker = mVelocityTracker;
                 velocityTracker.computeCurrentVelocity(1000, mMaximumVelocity);