android 计算时间差 工具类,很实用的Android日期计算类

分享一个使用较方便的日期计算类：

package com.utils.datecount;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.GregorianCalendar;

public class DateCount {

/**

* datelevel 0为7天内，1为7到15天，2为15天以上

*/

public static int datelevel = 0;

public static int positionweek = -1;

public static int position2week = -1;

/**

* 获取与今天时间差

* @param endTime

* @return

*/

public static double countDate(String startTime) {

Date curDate = new Date(System.currentTimeMillis());// 获取当前时间

SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");// 输入日期的格式

Date date = null;

try {

date = simpleDateFormat.parse(startTime);

if (date == null) return 0;

} catch (java.text.ParseException e) {

return 0;

// e.printStackTrace();

}

GregorianCalendar cal1 = new GregorianCalendar();

GregorianCalendar cal2 = new GregorianCalendar();

cal1.setTime(date);

cal2.setTime(curDate);

double dayCount = (cal2.getTimeInMillis() - cal1.getTimeInMillis()) / (1000 * 3600 * 24);// 从间隔毫秒变成间隔天数

return dayCount;

}

}

Android日期格式化工具类：

package com.utils.tools;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.Calendar;

import java.util.Date;

import android.text.TextUtils;

import android.text.format.DateFormat;

/**

* 日期格式化工具类

*

* @author Harryxu

*

*/

public class DateUtil {

public static Date convert2Date(String format, String dateStr) {

Date date = null;

try {

if (TextUtils.isEmpty(format)) format = "yyyy-MM-dd HH:mm:ss";

return new java.sql.Date(new SimpleDateFormat(format).parse(dateStr).getTime());

} catch (IllegalArgumentException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

return date;

}

public static CharSequence formatDate(String format, String dateStr) {

Date date = null;

try {

date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(dateStr);

} catch (IllegalArgumentException e) {

e.printStackTrace();

} catch (Exception e) {

e.printStackTrace();

}

if (date == null) date = new Date();

if (TextUtils.isEmpty(format)) format = "yyyy-MM-dd";

return DateFormat.format(format, date);

}

/**

* 根据偏量值取得传入时间的前后天数

*

* @param date

* @param offset 时间偏量值

* @return

*/

public static Date getNextPreDay(Date date, int offset) {

Calendar calendar = Calendar.getInstance();

calendar.setTime(date);

calendar.add(Calendar.DAY_OF_MONTH, offset);

date = calendar.getTime();

return date;

}

public static int getDays(Date date1, Date date2) {

Date kaishi = date1, jieshu = date2;

if (date1.compareTo(date2) > 0) {

kaishi = date2;

jieshu = date1;

}

long diff = jieshu.getTime() - kaishi.getTime();

float days = diff / 24f / 60 / 60 / 1000;

return (int) ((days - (int) days) >= 0 ? (days + 1) : days);

}

public static String addMinites( String time, int addminite){

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

Calendar totime = Calendar.getInstance();

java.util.Date date = null;

try {

date = myFormatter.parse(time);

} catch (ParseException e) {

e.printStackTrace();

}

if (date == null) return null;

totime.setTime(date);

totime.add(Calendar.MINUTE, addminite);

date = totime.getTime();

return myFormatter.format(date);

}

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。