Java countdown timer delay Android

I'm making a chess clock, but I need to delay it (for example, it needs to wait 10 seconds to count). I used a handler for this, but nothing happens if I click the button in 10 seconds. Please help! thank you! My code:

    mHandler.postDelayed(new Runnable() {
                        public void run() {
                            // count down timer start
                            timer2 = new CountDownTimer(totalSeconds, Integer.parseInt(delay.getText().toString())) {
                                public void onTick(long millisUntilFinished) {
                                    secondsTimer = (int) (millisUntilFinished / 1000) % 60;
                                    minutesTimer = (int) ((millisUntilFinished / (1000 * 60)) % 60);
                                    hoursTimer = (int) ((millisUntilFinished / (1000 * 60 * 60)) % 24);
                                    person2.setText(hoursTimer + ":" + minutesTimer + ":" + secondsTimer);
                                }

                                public void onFinish() {
                                    person2.setText("Time Up!");
                                    person2.setBackgroundColor(Color.RED);
                                    mp.start();
                                }
                            }.start();
                        }
                    }, finalDelay);

I need a delay, but I don't want to lock the UI and make the application unresponsive because it is now operating with a handler. Any help will be appreciated! Thank you in advance!

resolvent:

I don't think you should put countdowntimer into the handler. You can create two handlers. This is an example

private void startHandlerAndWait10Seconds(){
    Handler handler1 = new Handler();
    handler1.postDelayed(new Runnable() {

        public void run() {
            // Start Countdown timer after wait for 10 seconds
            startCountDown();

        }
    }, 10000);
}

private void startCountDown {
    final Handler handler2 = new Handler();
    handler2.post(new Runnable() {
        int seconds = 60;

        public void run() {
            seconds--;
            mhello.setText("" + seconds);
            if (seconds < 0) {
                // DO SOMETHING WHEN TIMES UP
                stopTimer = true;
            }
            if(stopTimer == false) {
                handler2.postDelayed(this, 1000);
            }

        }
    });
}