title: BroadcastReceiver not called when screen locked in Android
body: <p>In my Application, when a notification arrives, the <code>BroadcastReceiver</code> is not called if the screen is locked.
  But when screen is unlocked, the <code>BroadcastReceiver</code> is called and displays the notification.</p>
  
  <p>I also put the following permission in my manifest:</p>
  
  <pre><code>android.permission.WAKE_LOCK
  </code></pre>
  
  <p>But still not working.</p>