I have problem in android studio with making timer

Question

In the app, I reopen the same activity that the timer is in. The first time timer works but after that it starts bugging the Runs onFinish() at random time. How can I fix that?

new CountDownTimer(10000, 1000) {
    public void onTick(long millisUntilFinished) {
        textQuestion.setText("seconds remaining: " + millisUntilFinished / 1000);
    }
    public void onFinish() {
        wrongAnswer();
    }
}.start();

Answer 1

You must store CountDownTimer in timer and cancel it when you move to another activity or fragment ;

Create CountDownTimer as global variable(above onCreate)

CountDownTimer timer;

Initialize timer where you want start a timer or whenever

timer = new CountDownTimer(10000, 1000) {

        public void onTick(long millisUntilFinished) {
            textQuestion.setText("seconds remaining: " + millisUntilFinished / 1000);
        }

        public void onFinish() {
            wrongAnswer();
        }
    }.start();

And in onDestroy cancel it

@Override
protected void onDestroy() {
    if(timer != null) timer.cancel();
    super.onDestroy();
}