可用于短信发送倒计时，请求倒计时等各个地方，使用方便，与组件解耦。

import android.os.CountDownTimer;
import android.view.View;
/**
 * 倒计时计时工具
 * @author wjh 2021-01-29
 *
 * 当Activity/Fragment销毁的时候记得 调用CountDownTimerUtils.cancle
 * Fragment在onDestoryView时调用 视图被移除时（reason：CountDownTimerUtils调用可能会涉及Ui的改变）
 *
 */

public class CountDownTimerUtils extends CountDownTimer {
    private View view;
    private long countDownInterval;
    private OnFinishListener listener;
    private OnTickListener tickListener;
    public interface OnFinishListener{
        void onFinishListener(View v);
    }

    public interface OnTickListener{
        void onTickListener(View v, long millisUntilFinished, long countDownInterval);
    }
    public CountDownTimerUtils(View view, long millisInFuture, long countDownInterval, OnTickListener tickListener, OnFinishListener listener){
        super(millisInFuture,countDownInterval);
        this.view=view;//倒计时相关组件  可以是TextView Button 等等
        this.countDownInterval=countDownInterval;//倒计时时长
        this.listener=listener;//倒计时结束监听
        this.tickListener=tickListener;//计时监听 相隔一秒调用
    }

    @Override
    public void onTick(long millisUntilFinished) {
        tickListener.onTickListener(view,millisUntilFinished,countDownInterval);
    }

    @Override
    public void onFinish() {
        listener.onFinishListener(view);
    }
}

使用

//对当前获取验证码控件进行倒计时相关设置
        CountDownTimerUtils countDownTimerUtils = new CountDownTimerUtils(get_auth_code_tv, 60000, 1000, new CountDownTimerUtils.OnTickListener() {
            @Override
            public void onTickListener(View v, long millisUntilFinished, long countDownInterval) {
                TextView view = (TextView) v;
                view.setTextColor(ContextCompat.getColor(view.getContext(), R.color.black));
                //设置不可用
                view.setEnabled(false);
                //设置倒计时时间
                view.setText("已发送(" + millisUntilFinished / countDownInterval + ")");
            }
        }, new CountDownTimerUtils.OnFinishListener() {
            @Override
            public void onFinishListener(View v) {
                TextView view = (TextView) v;
                view.setTextColor(ContextCompat.getColor(view.getContext(), R.color.enabled_2_color));
                view.setText(R.string.get_auth_code);
                //重新获得点击
                view.setEnabled(true);
            }
        });
        countDownTimerUtils.start();//在需要的地方调用该方法启动倒计时