根据时间戳判断是星期几

Calendar cal=CalendarUtils.zeroFromHour(info.daily_date);
String name="";
if(cal.get(Calendar.DAY_OF_WEEK)==Calendar.SATURDAY)
{
name="星期六";
}
if(cal.get(Calendar.DAY_OF_WEEK)==Calendar.SUNDAY)
{
name="星期日";
}

public final class CalendarUtils {

/**
* 将时间戳转换成当天零点的时间戳
*
* @param milliseconds
* @return
*/
public static Calendar zeroFromHour(long milliseconds) {
Calendar calendar = getCalendar();
calendar.setTimeInMillis(completMilliseconds(milliseconds));
zeroFromHour(calendar);
return calendar;
}

/**
* 将时，分，秒，以及毫秒值设置为0
*
* @param calendar
*/
public static void zeroFromHour(Calendar calendar) {
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
}

/**
* 由于服务器返回的是10位，手机端使用需要补全3位
*
* @param milliseconds
* @return
*/
private static long completMilliseconds(long milliseconds) {
String milStr = Long.toString(milliseconds);
if (milStr.length() == 10) {
milliseconds = milliseconds * 1000;
}
return milliseconds;
}

}