CountDownTimerTask extends AsyncTask

CountDownTask.java

class CountDownTask extends AsyncTask<Long, Void, Pair<String, String>> {
        @Override
        protected Pair<String, String> doInBackground(Long... params) {
            long millisUntilFinished = params[0];
            long day = millisUntilFinished / (24 * 60 * 60 * SECOND_IN_MILLIS);
            long hour = (millisUntilFinished / (60 * 60 * SECOND_IN_MILLIS) - day * 24);
            long min = ((millisUntilFinished / (60 * SECOND_IN_MILLIS)) - day * 24 * 60 - hour * 60);
            long s = (millisUntilFinished / SECOND_IN_MILLIS - day * 24 * 60 * 60 - hour * 60 * 60 - min * 60);
            String timeLeft = "" + day + "天" + hour + "小时" + min + "分" + s + "秒";
            String dayLeft = String.format(Locale.CHINA, "请%d天内处理，超时系统将自动同意此次售后。", day + 1);
            Pair<String, String> pair = new Pair<>(timeLeft, dayLeft);
            return pair;
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }

        @Override
        protected void onPostExecute(Pair<String, String> result) {
            super.onPostExecute(result);
            mBinding.tvLeftTime.setText(result.first);
            mBinding.tvLimitDay.setText(result.second);
        }
    }