android - 从两个日期中找到月份和日期的差异

Question

我想找出两个日期之间的月日差。一个是我的系统当前日期，另一个是 future 的日期。

future 的日期是这样的格式:

2014-02-06 21:26

我使用下面的代码来找出不同之处。

1.

currentCal = Calendar.getInstance();
weddingCal = Calendar.getInstance();
weddingCal.clear();
DateFormat formatterResponseDate = new SimpleDateFormat("yyyy-MM-dd HH:mm");
formatterResponseDate.setTimeZone(TimeZone.getTimeZone("GMT")); 
weddingCal.setTime(formatterResponseDate.parse(responseThis.trim()));
long dateDiff = weddingCal.getTimeInMillis() -
currentCal.getTimeInMillis();
long months = dateDiff / (30 * 24 * 60 * 60 * 1000); 
long days = (dateDiff % (30 * 24 * 60 * 60 * 1000)) / (24 * 60 * 60 * 1000);

但它给了我错误的结果，我认为这不方便，因为有时一个月有 31 天。我也用过JODA - Time找出不同之处，但这对我也没有帮助。

2.

currentCal = Calendar.getInstance();
startDate = new DateTime(currentCal.get(Calendar.YEAR),
(currentCal.get(Calendar.MONTH)+1),
currentCal.get(Calendar.DAY_OF_MONTH), currentCal.get(Calendar.HOUR),
currentCal.get(Calendar.MINUTE));
weddingCal = Calendar.getInstance();
weddingCal.clear();
weddingCal.setTime(formatterResponseDate.parse(responseThis.trim()));
endDate = new DateTime(weddingCal.get(Calendar.YEAR), (weddingCal.get(Calendar.MONTH)+1),
weddingCal.get(Calendar.DAY_OF_MONTH), weddingCal.get(Calendar.HOUR),
weddingCal.get(Calendar.MINUTE));
Period period = new Period(startDate, endDate);
tvMonth.setText(String.valueOf(period.getMonths()));
tvDays.setText(String.valueOf(period.getDays()));

两者都不工作请帮助我，我怎样才能找到它？ 谢谢

Answer 1

我使用了下面的代码，它工作正常。

currentCal = Calendar.getInstance();
startDate = new DateTime(currentCal.get(Calendar.YEAR),
                         (currentCal.get(Calendar.MONTH)+1),
                         currentCal.get(Calendar.DAY_OF_MONTH),
                         currentCal.get(Calendar.HOUR),
                         currentCal.get(Calendar.MINUTE));
weddingCal = Calendar.getInstance();
weddingCal.clear();
weddingCal.setTime(formatterResponseDate.parse(responseThis.trim()));
endDate = new DateTime(weddingCal.get(Calendar.YEAR),
                       (weddingCal.get(Calendar.MONTH)+1),
                       weddingCal.get(Calendar.DAY_OF_MONTH),
                       weddingCal.get(Calendar.HOUR),
                       weddingCal.get(Calendar.MINUTE));
Period period = new Period(startDate, endDate, PeriodType.yearMonthDayTime());
tvMonth.setText(String.valueOf(period.getMonths()));
tvDays.setText(String.valueOf(period.getDays()));