private SimpleDateFormat simpleDateFormat;
simpleDateFormat = new SimpleDateFormat("HH:mm:ss");
new CountDownTimer(time, 1000) {
@Override
public void onTick(long millisUntilFinished) {
String format = simpleDateFormat.format(new Date(millisUntilFinished));
tv1.setText(format);
}
@Override
public void onFinish() {
}
}.start();