How would I set a timer on the number entered into text box?

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http://stackoverflow.com – I'm trying to do a new CountDownTimer() with the time (to count down from) assigned by the number entered into a text box ("Number Decimal" box). For example, the user would type in "3", hit start, and it would count down from that. From here, where would I start? new CountDownTimer(30000, 1000) { public void onTick(long millisUntilFinished) { timeLeft.setText("seconds remaining: " + millisUntilFinished / 1000); } public void onFinish() { timeLeft.set (HowTos)