Merge "ActivityThread: Avoid creating duplicate handlers and reuse mH"

Author: Dianne Hackborn

core/java/android/app/ActivityThread.java

@@ -4728,13 +4728,14 @@ public static void main(String[] args) {
         Process.setArgV0("<pre-initialized>");
 
         Looper.prepareMainLooper();
-        if (sMainThreadHandler == null) {
-            sMainThreadHandler = new Handler();
-        }
 
         ActivityThread thread = new ActivityThread();
         thread.attach(false);
 
+        if (sMainThreadHandler == null) {
+            sMainThreadHandler = thread.getHandler();
+        }
+
         AsyncTask.init();
 
         if (false) {