Here is the code that would set the date to next Sunday
public Date setDateToNextSundayZero(Date date) {
int dayOfWeek = date.getDay();
int daysToAdd = 7 - dayOfWeek;
date = DateUtils.setBeginDateFromDate(date, -daysToAdd);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
return calendar.getTime();
}
The solution is simple. Use the day of the week. And finding next Sunday is then easy as shown above.