Google Android - это несложно

Код: Выделить всё

public class UpdateService extends Service {
   private int seconds;
   final static String MY_ACTION = "MY_ACTION";

@Override
public void onCreate() {
    super.onCreate();
}

@Override
public void onStart(Intent intent, int startId) {
    timer.start();
}

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

final CountDownTimer timer = new CountDownTimer(86400000, 1000) {

    public void onTick(long millisUntilFinished) {

        Util.saveInfo(getApplicationContext(), Util.SECONDS, seconds++);

        Intent intent = new Intent();
        intent.setAction(MY_ACTION);
        sendBroadcast(intent);
    }

     public void onFinish() { }
  };
}