android:If not happen in 15 seconds do this condition

Question

I want to add a condition on OTP recieve app.In which if its not signing up automatically when message come after 15 seconds it should allow the user to manually enter the OTP.I think there must be use of thread or handler?

Answer 1

   private CountDownTimer countDownTimer = new CountDownTimer(15000, 1000 / 100) {
    @Override
    public void onTick(long l) {
       // call when timer start
    }

    @Override
    public void onFinish() {

        Toast.makeText(MainActivity.this, "Done",    Toast.LENGTH_SHORT).show();
    }
};

to start Timer

countDownTimer.start()