public class OutgoingCallReceiver extends BroadcastReceiver {

   public static final String ABORT_PHONE_NUMBER = "1231231234";

   private static final String OUTGOING_CALL_ACTION = "android.intent.action.NEW_OUTGOING_CALL";
   private static final String INTENT_PHONE_NUMBER = "android.intent.extra.PHONE_NUMBER";

   @Override
   public void onReceive(final Context context,final Intent intent) {
      Log.v(Constants.LOGTAG,"OutgoingCallReceiver onReceive");
      if (intent.getAction().equals(OutgoingCallReceiver.OUTGOING_CALL_ACTION)) {
         Log.v(Constants.LOGTAG,"OutgoingCallReceiver NEW_OUTGOING_CALL received");

         // get phone number from bundle
         String phoneNumber = intent.getExtras().getString(OutgoingCallReceiver.INTENT_PHONE_NUMBER);
         if ((phoneNumber != null) && phoneNumber.equals(OutgoingCallReceiver.ABORT_PHONE_NUMBER)) {
            Toast.makeText(context,"NEW_OUTGOING_CALL intercepted to number 123-123-1234 - aborting call",Toast.LENGTH_LONG).show();
            this.abortBroadcast();
         }
      }
   }
}