Android 计算俩个时间戳之差（天、时、分、秒）

            //获取结束的时间戳
            long expirationTime = data.getExpirationTime();
            //获得当前时间戳
            long timeStamp = System.currentTimeMillis();
            //格式
            SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            //转换为String类型
            String endDate = formatter.format(expirationTime);//结束的时间戳
            String startDate = formatter.format(timeStamp);//开始的时间戳
            // 获取服务器返回的时间戳 转换成"yyyy-MM-dd HH:mm:ss"
            // 计算的时间差
            DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            try {
                Date d1 = df.parse(endDate);//后的时间
                Date d2 = df.parse(startDate); //前的时间
                Long diff = d1.getTime() - d2.getTime(); //两时间差，精确到毫秒
                Long day = diff / (1000 * 60 * 60 * 24); //以天数为单位取整
                Long hour=(diff/(60*60*1000)-day*24); //以小时为单位取整
                Long min=((diff/(60*1000))-day*24*60-hour*60); //以分钟为单位取整
                Long second=(diff/1000-day*24*60*60-hour*60*60-min*60);//秒
                Log.e("tag","day =" +day);
                Log.e("tag","hour =" +hour);
                Log.e("tag","min =" +min);
                Log.e("tag","second =" +second);
            } catch (ParseException e) {
                e.printStackTrace();
            }

参考：https://blog.csdn.net/weixin_42630638/article/details/123983058