Display the remaining time of the handler

Question

I would like to know how to display the time remaining in my handler. When I click a button, I run my handler for x seconds, and I want to display a countdown on the screen before the end of the handler.

Answer 1

official documentation

Example of showing a 30 second countdown in a text field:

new CountDownTimer(30000, 1000) {
     public void onTick(long millisUntilFinished) {
         mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
     }

     public void onFinish() {
         mTextField.setText("done!");
     }
}.start();