import java.math.BigDecimal;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

public class DateUtils {

private static final String TAG = "DateUtils";

private static final String[] weekDays = {"星期天","星期一","星期二","星期三","星期四","星期五","星期六"};

public static void addDay(Calendar calendar, int value) {

calendar.add(Calendar.DATE, value);

}

public static void addMonth(Calendar calendar, int value) {

calendar.add(Calendar.MONTH, value);

}

public static Calendar getWeekStartDate(Calendar calendar) {

int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);

Calendar calendar2 = (Calendar) calendar.clone();

addDay(calendar2, 1 - dayOfWeek);

return calendar2;

}

public static Calendar getWeekEndDate(Calendar calendar) {

int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);

Calendar calendar2 = (Calendar) calendar.clone();

addDay(calendar2, 7 - dayOfWeek);

return calendar2;

}

public static long getWeekStartTime(Calendar calendar) {

Calendar calendar2 = getWeekStartDate(calendar);

calendar2.set(Calendar.HOUR_OF_DAY, 0);

calendar2.set(Calendar.MINUTE, 0);

calendar2.set(Calendar.SECOND, 0);

return calendar2.getTimeInMillis();

}

public static long getWeekEndTime(Calendar calendar) {

Calendar calendar2 = getWeekEndDate(calendar);

calendar2.set(Calendar.HOUR_OF_DAY, 23);

calendar2.set(Calendar.MINUTE, 59);

calendar2.set(Calendar.SECOND, 59);

return calendar2.getTimeInMillis();

}

public static long getMonthStartTime(Calendar calendar) {

Calendar calendar2 = (Calendar) calendar.clone();

calendar2.set(Calendar.DAY_OF_MONTH, 1);

return calendar2.getTimeInMillis();

}

public static long getMonthEndTime(Calendar calendar) {

Calendar calendar2 = (Calendar) calendar.clone();

addMonth(calendar2, 1);

calendar2.set(Calendar.DAY_OF_MONTH, 1);

return calendar2.getTimeInMillis() - 1;

}

public static float getWorkHour(String duration) {

float second = Float.parseFloat(duration);

float hour = second / 3600;

BigDecimal b = new BigDecimal(hour);

return b.setScale(1, BigDecimal.ROUND_HALF_UP).floatValue();

}

public static String getWeekDay(Calendar calendar) {

int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);

if (dayOfWeek < 1 || dayOfWeek > 7) {

return "";

}

return weekDays[dayOfWeek - 1];

}

public static String getDate(long currentTime) {

Date date = new Date(currentTime);

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");

return formatter.format(date);

}

public static String getHour(long time) {

return time / 3600 + "";

}

public static String getMinite(long time) {

return Math.round(time % 3600 / (double) 60) + "";

}

public static String getTime(long currentTime) {

//Website store the second of now, not the milisecond.

Date date = new Date(currentTime * 1000);

SimpleDateFormat formatter = new SimpleDateFormat("HH:mm");

return formatter.format(date);

}

}