title: How to determine the sender of Broadcast Intent
body: <p>I have an application that is at the same time a broadcast sender and receiver of standard action android.intent.action.SET_WALLPAPER. I want to do some stuff only in a case when another application broadcasted this intent.</p>
  
  <p>Is there any way to determine who initiated a broadcast in onReceive method of a BroadcastReceiver?</p>