效果预览
image
思路：
1、RecyclerView+Calendar
2、Calendar获取整月的天数
3、Calendar获取上一个月和下一个月需要补全的天数
1、Calendar获取整月的天数
Calendar instance = Calendar.getInstance();
if (indexDate != null) {
//自定月份
instance.setTime(indexDate.getDate());
}
//获取当前月最大的日期
int maxDate = instance.getActualMaximum(Calendar.DATE);
instance.set(Calendar.DAY_OF_MONTH, 1);
//获取当前月所有的天数
for (int i = 0; i < maxDate; i++, instance.add(Calendar.DATE, 1)) {
int day = instance.get(Calendar.DAY_OF_MONTH);
CalendarBean calendarBean = new CalendarBean();
calendarBean.setDay(String.valueOf(day));
calendarBean.setDate(instance.getTime());
mDatas.add(calendarBean);
}
2、获取上一个月需要补全的天数
private ArrayListgetLastMonth(CalendarBean calendarBean) {
//获取当前月第一天
Calendar calendarFirstDay = Calendar.getInstance();
calendarFirstDay.setTime(calendarBean.getDate());
calendarFirstDay.set(Calendar.DAY_OF_MONTH, 1);
//当月第一天是星期几
int firstDayOfWeek = calendarFirstDay.get(Calendar.DAY_OF_WEEK);
if (firstDayOfWeek != 1) {
/**
* firstDayOfWeek =1时，就是星期日，当前月第一天已经处于星期日，不需要添加上一个月补充天数
*/
//需要补全的天数，当needAdd为负数时候，说明是星期日，需要补6天
int needAdd = firstDayOfWeek - 1;
ArrayListlastMonth = new ArrayList<>();
for (int i = 0; i < needAdd; i++) {
CalendarBean dayBean = new CalendarBean();
//0：当月，1：上月，2：下一个月
dayBean.setDayType(1);
dayBean.setWeekOfDay(getWeekString(i));
//取出上一个月需要补全的天数
//calendarFirstDay.set(Calendar.DAY_OF_MONTH, 0 - i);
calendarFirstDay.add(Calendar.DATE, -1);
//上一个月的天数
int lastMonthDay = calendarFirstDay.get(Calendar.DAY_OF_MONTH);
dayBean.setDay(String.valueOf(lastMonthDay));
dayBean.setDate(dayBean.getDate());
lastMonth.add(0, dayBean);
}
return lastMonth;
}
return new ArrayList<>();
}
3、获取下一个月需要补全的天数
private ArrayListgetNextMonth(CalendarBean calendarBean) {
//获取当前月最后一天
Calendar calendarLastDay = Calendar.getInstance();
calendarLastDay.setTime(calendarBean.getDate());
calendarLastDay.add(Calendar.MONTH, 1);
calendarLastDay.set(Calendar.DAY_OF_MONTH, 0);
//获取当前月最后一天是星期几
int nextDayOfWeek = calendarLastDay.get(Calendar.DAY_OF_WEEK);
if (nextDayOfWeek != 7) {
/**
* nextDayOfWeek =7时，就是星期六，当前月最后一天已经处于星期六，不需要添加上一个月补充天数
*/
int needAdd = 7 - nextDayOfWeek;
ArrayListnextMonth = new ArrayList<>();
for (int i = 1; i <= needAdd; i++) {
CalendarBean dayBean = new CalendarBean();
//0：当月，1：上月，2：下一个月
dayBean.setDayType(2);
dayBean.setWeekOfDay(getWeekString(i));
//取出上一个月需要补全的天数
calendarLastDay.set(Calendar.DAY_OF_MONTH, i);
//上一个月的天数
int lastMonthDay = calendarLastDay.get(Calendar.DAY_OF_MONTH);
dayBean.setDay(String.valueOf(lastMonthDay));
dayBean.setDate(dayBean.getDate());
nextMonth.add(dayBean);
}
return nextMonth;
}
return new ArrayList<>();
}
Demo地址
