Android日期操作

第一种方法

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");// HH:mm:ss
//获取当前时间
Date date = new Date(System.currentTimeMillis());
time1.setText("Date获取当前日期时间"+simpleDateFormat.format(date));

第二种方法Calendar calendar = Calendar.getInstance();

//年
int year = calendar.get(Calendar.YEAR);
//月
int month = calendar.get(Calendar.MONTH)+1;
//日
int day = calendar.get(Calendar.DAY_OF_MONTH);
//获取系统时间
//小时
int hour = calendar.get(Calendar.HOUR_OF_DAY);
//分钟
int minute = calendar.get(Calendar.MINUTE);
//秒
int second = calendar.get(Calendar.SECOND);

time2.setText("Calendar获取当前日期"+year+"年"+month+"月"+day+"日"+hour+":"+minute+":"+second);

第三种方法Time t=new Time(); // or Time t=new Time("GMT+8"); 加上Time Zone资料。

Time time = new Time();
time.setToNow();// 设置当前时间

int year = t.year;
int month = t.month+1;
int day = t.monthDay;
int hour = t.hour; // 0-23
int minute = t.minute;
int second = t.second;
time3.setText("Calendar获取当前日期"+year+"年"+month+"月"+day+"日"+hour+":"+minute+":"+second);

**细心的可能发现月份要加上1，这个是因为是0开始计算的，所以用时要加上1。第一次接触Android的可能最后一个看不懂，time1,time2 ,time3是TextView的对象记得用时需要初始化下 

import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class KXX {

public static void main(String[] args) {
SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");

Date today = new Date();
System.out.println("今天是:" + f.format(today));

Calendar c = Calendar.getInstance();
c.setTime(today);
c.add(Calendar.DAY_OF_MONTH, 1);// 今天+1天

Date tomorrow = c.getTime();
System.out.println("明天是:" + f.format(tomorrow));
}
}

/*
* 将时间转换为时间戳
*/
public static long dateToStamp(String s) throws ParseException {
String res;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = simpleDateFormat.parse(s);
long ts = date.getTime();
res = String.valueOf(ts);
return ts;
}

/*
* 将时间戳转换为时间
*/
public static String stampToDate(String s){
String res;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
long lt = new Long(s);
Date date = new Date(lt);
res = simpleDateFormat.format(date);
return res;
}

/**
* long转换时分秒
* @param l
* @return
*/
public static String formatLongToTimeStr(Long l) {
int hour = 0;
int minute = 0;
int second = 0;
second = l.intValue() ;
if (second > 60) {
minute = second / 60; //取整
second = second % 60; //取余
}
if (minute > 60) {
hour = minute / 60;
minute = minute % 60;
}
String strTime = hour+":"+minute+":"+second;
return strTime;
}

身份证取出生日期

public static Map<String, String> getBirAgeSex(String certificateNo) {
　　String birthday = "";
　　String age = "";
　　String sexCode = "";

int year = Calendar.getInstance().get(Calendar.YEAR);
char[] number = certificateNo.toCharArray();
boolean flag = true;
if (number.length == 15) {
for (int x = 0; x < number.length; x++) {
if (!flag) return new HashMap<String, String>();
flag = Character.isDigit(number[x]);
}
} else if (number.length == 18) {
for (int x = 0; x < number.length - 1; x++) {
if (!flag) return new HashMap<String, String>();
flag = Character.isDigit(number[x]);
}
}
if (flag && certificateNo.length() == 15) {
birthday = "19" + certificateNo.substring(6, 8) + "-"
+ certificateNo.substring(8, 10) + "-"
+ certificateNo.substring(10, 12);
sexCode = Integer.parseInt(certificateNo.substring(certificateNo.length() - 3, certificateNo.length())) % 2 == 0 ? "F" : "M";
age = (year - Integer.parseInt("19" + certificateNo.substring(6, 8))) + "";
} else if (flag && certificateNo.length() == 18) {
birthday = certificateNo.substring(6, 10) + "-"
+ certificateNo.substring(10, 12) + "-"
+ certificateNo.substring(12, 14);
sexCode = Integer.parseInt(certificateNo.substring(certificateNo.length() - 4, certificateNo.length() - 1)) % 2 == 0 ? "F" : "M";
age = (year - Integer.parseInt(certificateNo.substring(6, 10))) + "";
}
Map<String, String> map = new HashMap<String, String>();
map.put("birthday", birthday);
map.put("age", age);
map.put("sexCode", sexCode);
return map;
}