Update TextView every second in Android [duplicate]

Answer 1

I have created timer for seconds.

public class TimerForSeconds extends AppCompatActivity {

    private int seconds = 60;
    private TextView tvTimer;
    private Handler mHandler;
    private Runnable runnable = new Runnable() {
        @Override
        public void run() {
            if(seconds == 0){
                mHandler.removeCallbacks(runnable);
            }
            else{
                tvTimer.setText(seconds + "");
                seconds--;
                mHandler.postDelayed(runnable,1000);
            }
        }
    };

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.test_activity);

        tvTimer = (TextView) findViewById(R.id.tv_timer);
        mHandler = new Handler();
        mHandler.postDelayed(runnable,1000);
    }
}

//and also removCallback onDestroy too.