原理:
内部封装了handler
使用:
CountDownTimer mCountDownTimer = new CountDownTimer(3000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
String value = String.valueOf((int) (millisUntilFinished / 1000));
//倒计时中途
}
@Override
public void onFinish() {
//倒计时完后
}
};
//开启倒计时
mCountDownTimer.start();
//取消倒计时
mCountDownTimer.cancel();