ประกาศ Service 
public class IamService extends Service {

    public final static String EXTRA_TYPE = "type";
    public final static String EXTRA_UID = "uid";
    public final static int GET_TAXI = 98;
    public final static int GET_PASSENGER = 99;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if (intent.getExtras() != null) {
            int type = intent.getExtras().getInt(EXTRA_TYPE);
            Log.i("TAG", "type is " + type);
        }
        return Service.START_NOT_STICKY;
    }

    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
}

โค้ดภายใน Activity 
public void startGetData(int type) {
        Calendar cal = Calendar.getInstance();
        service = new Intent(this, TaxiMateService.class);
        service.putExtra(TaxiMateService.EXTRA_TYPE, type);

        intent = PendingIntent.getService(this, 0, service, PendingIntent.FLAG_UPDATE_CURRENT);
        // PendingIntent.FLAG_UPDATE_CURRENT) คือ ให้ update extra ทุกครั้งที่เรียก Service

        alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
        alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 5 * 1000, intent);
   }

    public void stopGetData() {
        if (alarm != null) {
            alarm.cancel(intent);
        }
    }

    public void stopService() {
        if (service != null) {
            stopService(service);
        }
    }