repositories {
   mavenCentral()     
}

implementation 'cn.dlihasa.easykits:countdown:x.x.x'

CountDownView countDownView = (CountDownView)findViewById(R.id.countDownView);
countDownView.setCompareTime(System.currentTimeMillis()+2000);//设置目标时间
countDownView.setFormat("剩余时间：mm:hh:ss");//支持xml配置文本格式
countDownView.setCountDownListener(new ICountDownListener() {
    @Override
    public void onFinish() {
        //设置监听结束业务
    }
});