public void signalEvent(int event_id, int event_info) { signalEvent(null, event_id, event_info);
public void signalEvent(int event_id) { signalEvent(null, dr.getCurrentActivity(), event_id, 0, 0, 0);
    public void signalEvent(int event_id,            int event_info) {        signalEvent(null, event_id, event_info);     }