Android日期差异以分钟为单位返回

Question

我从db获得UTC日期。并从当前的utc DateTime中减去它。我想有差异。在几分钟内。不太对劲。

            Date currenttimedate = DateTime.UTCNow();
            String lastsynctime = c.getString(c.getColumnIndex(columnname)).toString();
            Date lastruntimedate = DateTime.StringDateToDate(lastsynctime, "MM/dd/yyyy HH:mm:ss");
            long diffInMs = (currenttimedate. getTime() - lastruntimedate.getTime());

            // convert it to Minutes
            long diffInMins = TimeUnit.MILLISECONDS.toMinutes(diffInMs);

            // return time in minutes
            response = (int)(diffInMins);

它回归了720分钟。预期答案不能超过5.因为数据每5分钟同步一次。