Android 中日期的获取 获取往后 一周的时间

package chaoer.zerolif.buyer.community_life.dry_cleaning.utils;


import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.TimeZone;


/**
 * @author 李堂飞 20160822
 * 安卓中获取日期的工具类：
今天项目中用到自己获取日期，自己写了一个获取时间的工具类，分享出来：
包括获取 1 当前年月日 2 当前是周几  3、根据日期获取是周几 4、获取7天的日期 5、获取当天往后的一周
 */
public class DateUtils {


private static String mYear; // 当前年
private static String mMonth; // 月
private static String mDay;
private static String mWay;


/**
* 获取当前日期几月几号
*/
public static String getDateString() {


final Calendar c = Calendar.getInstance();
c.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
mMonth = String.valueOf(c.get(Calendar.MONTH) + 1);// 获取当前月份
mDay = String.valueOf(c.get(Calendar.DAY_OF_MONTH));// 获取当前月份的日期号码
if(Integer.parseInt(mDay) > MaxDayFromDay_OF_MONTH(Integer.parseInt(mYear),(Integer.parseInt(mMonth)))){
mDay = String.valueOf(MaxDayFromDay_OF_MONTH(Integer.parseInt(mYear),(Integer.parseInt(mMonth))));
}
return mMonth + "月" + mDay + "日";
}


/**
* 获取当前年月日
* 
* @return
*/
public static String StringData() {


final Calendar c = Calendar.getInstance();
c.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
mYear = String.valueOf(c.get(Calendar.YEAR));// 获取当前年份
mMonth = String.valueOf(c.get(Calendar.MONTH) + 1);// 获取当前月份
mDay = String.valueOf(c.get(Calendar.DAY_OF_MONTH));// 获取当前月份的日期号码
if(Integer.parseInt(mDay) > MaxDayFromDay_OF_MONTH(Integer.parseInt(mYear),(Integer.parseInt(mMonth)))){
mDay = String.valueOf(MaxDayFromDay_OF_MONTH(Integer.parseInt(mYear),(Integer.parseInt(mMonth))));
}
return mYear + "-" + (mMonth.length()==1?"0"+mMonth:mMonth) + "-" + (mDay.length()==1?"0"+mDay:mDay);
}


/**
* 根据当前日期获得是星期几
* 
* @return
*/
public static String getWeek(String time) {
String Week = "";


SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Calendar c = Calendar.getInstance();
try {


c.setTime(format.parse(time));


} catch (ParseException e) {
e.printStackTrace();
}
if (c.get(Calendar.DAY_OF_WEEK) == 1) {
Week += "周天";
}
if (c.get(Calendar.DAY_OF_WEEK) == 2) {
Week += "周一";
}
if (c.get(Calendar.DAY_OF_WEEK) == 3) {
Week += "周二";
}
if (c.get(Calendar.DAY_OF_WEEK) == 4) {
Week += "周三";
}
if (c.get(Calendar.DAY_OF_WEEK) == 5) {
Week += "周四";
}
if (c.get(Calendar.DAY_OF_WEEK) == 6) {
Week += "周五";
}
if (c.get(Calendar.DAY_OF_WEEK) == 7) {
Week += "周六";
}
return Week;
}


/**
* 获取今天往后一周的日期（几月几号）
*/
public static List getSevendate() {
List dates = new ArrayList();
final Calendar c = Calendar.getInstance();
c.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));


for (int i = 0; i < 7; i++) {
mYear = String.valueOf(c.get(Calendar.YEAR));// 获取当前年份
mMonth = String.valueOf(c.get(Calendar.MONTH) + 1);// 获取当前月份
mDay = String.valueOf(c.get(Calendar.DAY_OF_MONTH) + i);// 获取当前日份的日期号码
if(Integer.parseInt(mDay) > MaxDayFromDay_OF_MONTH(Integer.parseInt(mYear),(i+1))){
mDay = String.valueOf(MaxDayFromDay_OF_MONTH(Integer.parseInt(mYear),(i+1)));
}
String date = mMonth + "月" + mDay + "日";
dates.add(date);
}
return dates;
}


/**
* 获取今天往后一周的集合
*/
public static List get7week() {
String week = "";
List weeksList = new ArrayList();
List dateList = get7date();
for (String s : dateList) {
if (s.equals(StringData())) {
week = "今天";
} else {
week = getWeek(s);
}
weeksList.add(week);
}
return weeksList;
}


public static List get7date() {
List dates = new ArrayList();
final Calendar c = Calendar.getInstance();
c.setTimeZone(TimeZone.getTimeZone("GMT+8:00"));
java.text.SimpleDateFormat sim = new java.text.SimpleDateFormat(
"yyyy-MM-dd");
String date = sim.format(c.getTime());
dates.add(date);
for (int i = 0; i < 6; i++) {
c.add(java.util.Calendar.DAY_OF_MONTH, 1);
date = sim.format(c.getTime());
dates.add(date);
}
return dates;
}

/**得到当年当月的最大日期**/
public static int MaxDayFromDay_OF_MONTH(int year,int month){
Calendar time=Calendar.getInstance();     
time.clear();     
time.set(Calendar.YEAR,year);     
time.set(Calendar.MONTH,month-1);//注意,Calendar对象默认一月为0                 
int day=time.getActualMaximum(Calendar.DAY_OF_MONTH);//本月份的天数
return day;
}
}