Bundle bundle = msg.getData();
         byte[] data = bundle.getByteArray("data");
         String dataString = new String(data);

         if (dataString.equals("---N"))
             statusMessage.setText("Erro de conexão.");
         else if (dataString.equals("---S"))
             statusMessage.setText("Conectado.");

         //GerarNotificacao();

     }
};

NotificationManager nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    PendingIntent p = PendingIntent.getActivity(this, 0, new Intent(this, ActTelaUsuarios1.class), 0);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this);

    builder.setTicker("Ticker Texto")
            .setContentTitle("Titulo")
            .setContentText("Texto")
            .setSmallIcon(R.mipmap.logo_riscos)
            .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.logo_sem_fundo));

    builder.setContentIntent(p);

    Notification n = builder.build();
    nm.notify(R.mipmap.ic_launcher, n);


}