1-) Android RMOS - timer oluşturma

Timer timer = null;

public void masaTimerRefreshStart() {
    masaTimerStop();

    timer = new Timer();
    timer.schedule(new TimerTask() {  //her 60 sn de bir bildirimGonder(); metodu çağırılır.
        @Override
        public void run() {
            mainActivity.runOnUiThread(new TimerTask() {
                @Override
                public void run() {
                    //Log.d("timerrr", "timerrr");
                    setMasaRefreshTimer_azalt();
                }
            });
        }
    }, 0, 1000); //MasaRefresh_timer1000
}

public void masaTimerStop() {
    try {
        if (timer != null) {
            timer.cancel();
            timer = null;
        }
    } catch (Exception ex) {

    }

}


public boolean islemBitti = false;

@Override
public void onPause() {
    super.onPause();
    masaTimerStop();

    islemBitti = true;
}

@Override
public void onResume() {
    super.onResume();

    islemBitti = false;
}

MenuItem menuRefresh;

boolean ilk = true;

public void setMasaRefreshTimer_azalt() {
    try {
        if (ilk && MasaRefresh_timer != 0) {
            MasaRefresh_timer = MasaRefresh_timer + 3;
            ilk = false;
        }

        MasaRefresh_timer = MasaRefresh_timer - 1;
        menuRefresh.setTitle(MasaRefresh_timer + "");

        if (MasaRefresh_timer == 0) {
            MasaRefresh_timer = MasaRefresh_timerSabit + 1;
            // buradayenile
            Toast.makeText(mainActivity, "Yenilendi...", Toast.LENGTH_SHORT).show();
            masaTimerStop();

            if (islemBitti == false) {
                mainActivity.navController.navigate(R.id.nav_konum);
            }
        }
    } catch (Exception ex) {

    }


}

 -------------DİĞER-------------

...

 DovizGenelAdapter dovizAdapter = new DovizGenelAdapter(modelList2);
    GridLayoutManager mLayoutManager = new GridLayoutManager(getActivity(), 1);
        recyclerDoviz.setLayoutManager(mLayoutManager);
                recyclerDoviz.setItemAnimator(new DefaultItemAnimator());
                recyclerDoviz.setAdapter(dovizAdapter);
                dovizAdapter.notifyDataSetChanged();


                ilkKez = false;


                hideProgressViewDoviz();

                timerSayac = 0;
                timerBaslat();
                }

                int timerSayac = 0;


                Timer timer = null;

public boolean ilkKez = true;

public void timerBaslat() {
        timerStop();
        timer = new Timer();
        timer.schedule(new TimerTask() {  //her 60 sn de bir bildirimGonder(); metodu çağırılır.
@Override
public void run() {
        mainActivity.runOnUiThread(new TimerTask() {
@Override
public void run() {
        Log.d("timerrr", "timerrr");
        timerSayac++;

        if (timerSayac == 60) {
        timerStop();
        hepsiniYenile();
        }
        }
        });
        }
        }, 0, 1000); //MasaRefresh_timer1000
        }

public void timerStop() {
        try {
        if (timer != null) {
        timer.cancel();
        timer = null;
        }
        } catch (Exception ex) {

        }

        }