N天前开始时间/* N天前开始时间

* 1 == 昨天

* 2 == 前天

* 3 == 以此类推

*/

public static long NumberOfDaysStartUnixTime(int NumberOfDays ) {

Calendar calendar = Calendar.getInstance();

calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),calendar.get(Calendar.DAY_OF_MONTH)-NumberOfDays,0,0,0);

long yesterdayStart  = calendar.getTimeInMillis();

return yesterdayStart;

}

N天前结束时间/* N天前结束时间

* 1 == 昨天

* 2 == 前天

* 3 == 以此类推

*/

public static long NumberOfDaysEndUnixTime(int NumberOfDays) {

Calendar calendar = Calendar.getInstance();

calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),calendar.get(Calendar.DAY_OF_MONTH)-NumberOfDays,23,59,59);

long yesterdayEnd = calendar.getTimeInMillis();

return yesterdayEnd;

}