使用CountDownTimer实现倒计时功能

public class myCount extends CountDownTimer {
public myCount(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}

    @Override
    public void onTick(long l) {
      //开始计时调用
    }

    @Override
    public void onFinish() {
       //结束调用的方法
    }
}
//60秒倒计时

myCount mCount = new myCount（60000, 1000);
mCount.start();