日历返回不正确的MONTH，YEAR和DAY
我为我的应用程序日历使用了MaterialCalendarView。 我想读取用户点击日历上的下一个/上一个的月份和年份。 这是我的代码：
calendarView = (CalendarView) view.findViewById(R.id.calendarView);
calendarView.setOnPreviousButtonClickListener(new OnNavigationButtonClickListener() {
@Override
public void onClick() {
Calendar calendar = calendarView.getCurrentPageDate();
int previousMonth = calendar.MONTH;
int previousYear = calendar.YEAR;
Log.i(TAG, "--- previous month: " + previousMonth + "/" + previousYear + " - " + calendar);
}
});
calendarView.setOnForwardButtonClickListener(new OnNavigationButtonClickListener() {
@Override
public void onClick() {
Calendar calendar = calendarView.getCurrentPageDate();
int nextMonth = calendar.MONTH;
int nextYear = calendar.YEAR;
Log.i(TAG, "--- next month: " + nextMonth + "/" + nextYear + " - " + calendar);
}
});
但是，当我点击下一个/上一个箭头时，返回给我的MONTH和YEAR值不正确。 例如，在这个例子中，它的2018年1月。上个月应该是11年，而应该是2017年，下个月应该是1年和2018年。
但是，对于先前在日志中的点击，我看到：
I / CalendarFragment：---上个月：2/1 - java.util.GregorianCalendar [time = ?, areFieldsSet = false，areAllFieldsSet = true，lenient = true，zone = java.util.SimpleTimeZone [id = GMT，offset = 0，dstSavings = 3600000，useDaylight =假，startYear = 0，STARTMODE = 0，startMonth = 0，朝九特派= 0，startDayOfWeek = 0，开始时间= 0，startTimeMode = 0，endMode = 0，endMonth = 0，endday指定= 0，一个endDayOfWeek = 0，结束时间= 0，endTimeMode = 0]，Firstdayofweek可= 1，minimalDaysInFirstWeek = 1，ERA = 1，YEAR = 2017，月= 11，WEEK_OF_YEAR = 1，WEEK_OF_MONTH = 1，DAY_OF_MONTH = 1，DAY_OF_YEAR = 1，DAY_OF_WEEK = 3，DAY_OF_WEEK_IN_MONTH = 1，AM_PM = 0，HOUR = 0，HOUR_OF_DAY = 0，MINUTE = 0，SECOND = 0，微差= 0，ZONE_OFFSET = 0，DST_OFFSET = 0]
对于下一次点击，我看到：
I / CalendarFragment：--- next month：2/1 - java.util.GregorianCalendar [time = ?, areFieldsSet = false，areAllFieldsSet = true，lenient = true，zone = java.util.SimpleTimeZone [id = GMT，offset = 0，dstSavings = 3600000，useDaylight =假，startYear = 0，STARTMODE = 0，startMonth = 0，朝九特派= 0，startDayOfWeek = 0，开始时间= 0，startTimeMode = 0，endMode = 0，endMonth = 0，endday指定= 0，一个endDayOfWeek = 0，结束时间= 0，endTimeMode = 0]，Firstdayofweek可= 1，minimalDaysInFirstWeek = 1，ERA = 1，YEAR = 2018，月= 1，WEEK_OF_YEAR = 1，WEEK_OF_MONTH = 1，DAY_OF_MONTH = 1，DAY_OF_YEAR = 1，DAY_OF_WEEK = 3，DAY_OF_WEEK_IN_MONTH = 1，AM_PM = 0，HOUR = 0，HOUR_OF_DAY = 0，MINUTE = 0，SECOND = 0，微差= 0，ZONE_OFFSET = 0，DST_OFFSET = 0]
如果您看到日志，则日历实例值具有正确的MONTH和YEAR。 但是当我在外面访问它时，返回2和1.为什么？
同样的事情发生在我做setOnDayClickListener（）时
calendarView.setOnDayClickListener(new OnDayClickListener() {
@Override
public void onDayClick(EventDay eventDay) {
Calendar clickedDayCalendar = eventDay.getCalendar();
Log.i(TAG, "------- clicked day: " + clickedDayCalendar.DAY_OF_MONTH + " - " + clickedDayCalendar);
}
});
无论我在1月点击哪一天，它都会让我点击5天。以下是日志：
I / CalendarFragment：------- clicked day：5 - java.util.GregorianCalendar [time = ?, areFieldsSet = false，areAllFieldsSet = true，lenient = true，zone = java.util.SimpleTimeZone [id = GMT，偏移量= 0，dstSavings = 3600000，useDaylight =假，startYear = 0，STARTMODE = 0，startMonth = 0，朝九特派= 0，startDayOfWeek = 0，开始时间= 0，startTimeMode = 0，endMode = 0，endMonth = 0，endday指定= 0，一个endDayOfWeek = 0，结束时间= 0，endTimeMode = 0]，Firstdayofweek可= 1，minimalDaysInFirstWeek = 1，ERA = 1，YEAR = 2018，MONTH = 0，WEEK_OF_YEAR = 2，WEEK_OF_MONTH = 2，DAY_OF_MONTH = 12，DAY_OF_YEAR = 12 ，DAY_OF_WEEK = 6，DAY_OF_WEEK_IN_MONTH = 2，AM_PM = 0，HOUR = 10，HOUR_OF_DAY = 0，MINUTE = 0，SECOND = 0，微差= 0，ZONE_OFFSET = 0，DST_OFFSET = 0]
I / CalendarFragment：------- clicked day：5 - java.util.GregorianCalendar [time = ?, areFieldsSet = false，areAllFieldsSet = true，lenient = true，zone = java.util.SimpleTimeZone [id = GMT，偏移量= 0，dstSavings = 3600000，useDaylight =假，startYear = 0，STARTMODE = 0，startMonth = 0，朝九特派= 0，startDayOfWeek = 0，开始时间= 0，startTimeMode = 0，endMode = 0，endMonth = 0，endday指定= 0，一个endDayOfWeek = 0，结束时间= 0，endTimeMode = 0]，Firstdayofweek可= 1，minimalDaysInFirstWeek = 1，ERA = 1，YEAR = 2018，MONTH = 0，WEEK_OF_YEAR = 3，WEEK_OF_MONTH = 3，DAY_OF_MONTH = 20，DAY_OF_YEAR = 20 ，DAY_OF_WEEK = 7，DAY_OF_WEEK_IN_MONTH = 3，AM_PM = 1，HOUR = 3，HOUR_OF_DAY = 0，MINUTE = 0，SECOND = 0，微差= 0，ZONE_OFFSET = 0，DST_OFFSET = 0]
任何想法为什么发生这种情况？ 或者是什么原因造成的？
MONTH和YEAR是公共静态int变量。 所以用Calendar类访问它们。
Calendar calendar = calendarView.getCurrentPageDate();
int previousMonth = calendar.get(Calendar.MONTH) + 1;
int previousYear = calendar.get(Calendar.YEAR);
Log.i(TAG, "--- previous month: " + previousMonth + "/" + previousYear);
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