countdown timer in text view

Question

i wrote this code and i want when i click on btnGetPincode, a 60 sec count down timer start to run. but it didnt happen and the result in textview= 00:00 and nothing happen. why?

this is my code:

 btnGetPinCode.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
 btnGetPinCode.setClickable(false);
                btnGetPinCode.setBackgroundResource((R.drawable.button4));
                txtShowPinCode.setVisibility(View.VISIBLE);

                //initialize timer duration
                long duration = TimeUnit.MINUTES.toMillis(1);

                //initialize timer countdown timer
                new CountDownTimer(duration, 1000) {
                    @Override
                    public void onTick(long millisUntilFinished) {
                        String duration2 = String.format(Locale.ENGLISH, "%02d : %02d"
                                , TimeUnit.MILLISECONDS.toMinutes(1)
                                , TimeUnit.MILLISECONDS.toSeconds(1) -
                                        TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(1)));

                        //set converted time to textView
                        txtTimer.setVisibility(View.VISIBLE);
                        txtTimer.setText(duration2+"");
                        btnOk.setText(duration2);
                    }

                    @Override
                    public void onFinish() {
                        //when timer finished, hide text view
                        txtTimer.setVisibility(View.INVISIBLE);
                        btnGetPinCode.setBackgroundResource(R.drawable.button);
                        btnGetPinCode.setClickable(true);
                    }
                }.start();
    });

}

Answer 1

Issue: You set 1 in each argument in duration2 variable, so the TextView won't ever be changed, you need to set the actual value that is changed on every timer tick which is the parameter of the onTick() method >> millisUntilFinished

Change your timer to:

new CountDownTimer(duration, 1000) {
    @Override
    public void onTick(long millisUntilFinished) {
        String duration2 = String.format(Locale.ENGLISH, "%02d : %02d"
                , TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) //<<<<< change here
                , TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - //<<<< change here
                        TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))); //<<<<< change here

        //set converted time to textView
        txtTimer.setVisibility(View.VISIBLE);
        txtTimer.setText(duration2+"");
        btnOk.setText(duration2);
    }

    @Override
    public void onFinish() {
        //when timer finished, hide text view
        txtTimer.setVisibility(View.INVISIBLE);
        btnGetPinCode.setBackgroundResource(R.drawable.button);
        btnGetPinCode.setClickable(true);
    }
}.start();