am 98b930ce: Cleaning up keyguard persistence threads when the pager is detached. (Bug 7460991)

* commit '98b930ce4ca4258fe1d6e9df0053f6883517a241':
  Cleaning up keyguard persistence threads when the pager is detached. (Bug 7460991)

policy/src/com/android/internal/policy/impl/keyguard/KeyguardWidgetPager.java

@@ -98,6 +98,16 @@ public class KeyguardWidgetPager extends PagedView implements PagedView.PageSwit
         mBgPersistenceWorkerHandler = new Handler(mBgPersistenceWorkerThread.getLooper());
     }
 
+    @Override
+    protected void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+
+        // Clean up the persistence worker thread
+        if (mBgPersistenceWorkerThread != null) {
+            mBgPersistenceWorkerThread.quit();
+        }
+    }
+
     public void setViewStateManager(KeyguardViewStateManager viewStateManager) {
         mViewStateManager = viewStateManager;
     }