Enforce serial ordering of MotionEvents.

This change modifies ViewRoot to wait until the MotionEvent has been
delivered before telling the input dispatcher that it is finished.
The serial ordering guarantee will be required by new features that
may need to transfer touch focus from one window to another.

Change-Id: I0a64d1f0c8bc3f08846f213d6e28ce48b1d48e58

1 files changed, 4 insertions, 1 deletions

diff --git a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
index 274124b..567b270 100755
--- a/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
+++ b/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
@@ -232,8 +232,11 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         @Override
         public void handleMotion(MotionEvent event, Runnable finishedCallback) {
             finishedCallback.run();
+            
             synchronized (mLock) {
-                mPointerLocationView.addTouchEvent(event);
+                if (mPointerLocationView != null) {
+                    mPointerLocationView.addTouchEvent(event);
+                }
             }
         }
     };