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
<span style="font-size:18px;">package com.example.course;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
import java.util.TimeZone;
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
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
return mYear + "-" + mMonth + "-" + mDay;
}
/**
* 获取当前是周几
*
*/
public static String getWeekString() {
final Calendar c = Calendar.getInstance();
mWay = String.valueOf(c.get(Calendar.DAY_OF_WEEK));
if ("1".equals(mWay)) {
mWay = "周天";
} else if ("2".equals(mWay)) {
mWay = "周一";
} else if ("3".equals(mWay)) {
mWay = "周二";
} else if ("4".equals(mWay)) {
mWay = "周三";
} else if ("5".equals(mWay)) {
mWay = "周四";
} else if ("6".equals(mWay)) {
mWay = "周五";
} else if ("7".equals(mWay)) {
mWay = "周六";
}
return 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（年-月-日） */
public static List<String> get7date() {
List<String> dates = new ArrayList<String>();
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;
}
/**
* 获取今天往后一周的日期（几月几号）
*/
public static List<String> getSevendate() {
List<String > dates = new ArrayList<String>();
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
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<String > get7week(){
String week="";
List<String > weeksList = new ArrayList<String>();
List<String> dateList = get7date();
for(String s:dateList ){
if (s.equals(StringData())) {
week="今天";
}else {
week=getWeek(s);
}
weeksList.add(week);
}
return weeksList;
}
}</span><span style="font-size:24px;">
</span>