public class VoiceCallBroadcastReceiver extends BroadcastReceiver {
  @Override
  public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();

    if (NgnInviteEventArgs.ACTION_INVITE_EVENT.equals(action)) {
      NgnInviteEventArgs arguments = intent.getParcelableExtra(NgnEventArgs.EXTRA_EMBEDDED);
      if (arguments == null) {
        Log.e(Constants.TAG, "Invalid event arguments");
        return;
      }

      final NgnAVSession ngnAVSession = NgnAVSession.getSession(arguments.getSessionId());
      if (ngnAVSession == null) {
        Log.e(Constants.TAG, "NgnAVSession could not be fetched for this session");
        return;
      }

      NgnInviteSession.InviteState inviteState = ngnAVSession.getState();
      NgnEngine ngnEngine = NgnEngine.getInstance();

      switch(inviteState) {
        case NONE:
        default:
          Log.i(Constants.TAG, "Call state: " + inviteState);
          break;
        case INCOMING:
          Log.i(Constants.TAG, "Incoming call");
          ngnEngine.getSoundService().startRingTone();
          Handler handler = new Handler();
          handler.postDelayed(new Runnable() {
            @Override
            public void run() {
              ngnAVSession.acceptCall();
            }
          }, Constants.ACCEPT_CALL_DELAY_TIME);
          break;
        case INCALL:
          Log.i(Constants.TAG, "Call started");
          Toast.makeText(context, "Call connected", Toast.LENGTH_SHORT).show();
          ngnEngine.getSoundService().stopRingTone();
          break;
        case TERMINATED:
        case TERMINATING:
          Log.i(Constants.TAG, "Call ended");
          Toast.makeText(context, "Call disconnected", Toast.LENGTH_SHORT).show();
          ngnEngine.getSoundService().stopRingTone();
          ngnEngine.getSoundService().stopRingBackTone();
          break;
      }
    }
  }
}