Android : how to set On Off Timer for turn on/off tv?

Guys I'm doing one android apps... i want to open & close a Tv in particular timing.(morning 8am to 8pm tv should be open & after 8.01pm to 7.59am tv should be in off) please give me the timing logics code for this

Calendar localCalendar = Calendar.getInstance(TimeZone.getDefault()); // Date currentTime = localCalendar.getTime();

    int currentHour = localCalendar.get(Calendar.HOUR_OF_DAY);
    int currentMin = localCalendar.get(Calendar.MINUTE);

    int startHour = AppStateActivity.getStartTime();
    int EndHour = AppStateActivity.getEndTime();
    int EndStartMin = 0;
    if (startHour == 0 && EndHour == 0)
      {
        startHour = 8;
        EndHour = 20;
       }

    boolean flag = false;

    if (currentHour >= startHour && currentHour <= EndHour)
            {
        flag = true;

        if (!HDMI_ON) {
            mHtBaseApi.OpenHdmi();
            HDMI_ON = true;
            }

    } else {
        flag = false;
    }