title: Set BroadcastReceiver to be inactive
body: <p>I have a BroadcastReceiver set up in my Android application that receives SMS receive events. This works fine, but I want to be able to toggle SMS receiving on and off by toggling the BroadcastReceiver on and off. Because if I have a simple boolean inside the onReceive method, even if the SMS receiving is off, my application will start.  </p>
  
  <p>Is this possible to do?</p>
  
  <p>Cheers!</p>