title: Leaked Intent & AlarmManager
body: <p>I am trying to create authentication system which pops up the login window if the device has been off (SCREEN_OFF) for more than INTERVAL.</p>
  
  <p>I have registered a BroadcastReceiver to listen to SCREEN_ON/OFF events in the onCreate() of the launchable activity:</p>
  
  <pre><code>/* Listen to Screen On &amp; Off events */
    IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
    filter.addAction(Intent.ACTION_SCREEN_OFF);
    BroadcastReceiver screenOnOff = new ScreenOnOff();
    registerReceiver(screenOnOff, filter);
  </code></pre>
  
  <p>ScreenOnOff -- is a BroadcastReceiver which among other things does:</p>
  
  <pre><code>@Override
   public void onReceive(Context context, Intent intent) {
  
  
  mAuthenticationIntent = PendingIntent.getActivity(context, 0,
      new Intent(context, AuthenticationActivity.class), 0);
  
  String action = intent.getAction();
  
  if (action.equals(Intent.ACTION_SCREEN_OFF)) {
     AlarmManager mAlarmManager = (AlarmManager) context
       .getSystemService(context.ALARM_SERVICE);
     mAlarmManager.set(AlarmManager.ELAPSED_REALTIME, System
       .currentTimeMillis()
       + interval, mAuthenticationIntent);
  
     Log.d(LOG_TAG, "Alarm Set!");
    }
  </code></pre>
  
  <p>When the alarm goes off, the program crashes:</p>
  
  <pre><code>08-27 19:18:02.207: ERROR/ActivityThread(3165): Activity com.artoo.ArtooSlateActivity has leaked IntentReceiver com.artoo.authentication.ScreenOnOff@4495bca0 that was originally registered here. Are you missing a call to unregisterReceiver()?
  08-27 19:18:02.207: ERROR/ActivityThread(3165): android.app.IntentReceiverLeaked: Activity com.artoo.ArtooSlateActivity has leaked IntentReceiver com.artoo.authentication.ScreenOnOff@4495bca0 that was originally registered here. Are you missing a call to unregisterReceiver()?
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread$PackageInfo$ReceiverDispatcher.&lt;init&gt;(ActivityThread.java:939)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread$PackageInfo.getReceiverDispatcher(ActivityThread.java:734)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:791)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ContextImpl.registerReceiver(ContextImpl.java:778)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ContextImpl.registerReceiver(ContextImpl.java:772)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:318)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at com.artoo.ArtooSlateActivity.onCreate(ArtooSlateActivity.java:50)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3815)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread.access$2400(ActivityThread.java:125)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2037)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.os.Handler.dispatchMessage(Handler.java:99)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.os.Looper.loop(Looper.java:123)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at android.app.ActivityThread.main(ActivityThread.java:4627)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at java.lang.reflect.Method.invokeNative(Native Method)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at java.lang.reflect.Method.invoke(Method.java:521)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
  08-27 19:18:02.207: ERROR/ActivityThread(3165):     at dalvik.system.NativeStart.main(Native Method)
  </code></pre>
  
  <p>Any help will be most appreciated.</p>
  
  <p>Thanks, Sameer</p>