Android时间工具类

package com.dejun.commonsdk.util;

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

/**
 * Author:DoctorWei
 * Time:2018/12/21 13:40
 * De ion:时间工具类主要对时间进行格式化
 * email:1348172474@qq.com
 */

public class TimeUtil {
    /**
     * 将毫秒数转换成时间
     *
     * @param longTime
     * @return
     */
    public static String formatLongTime(Long longTime) {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(\"yyyy-MM-dd HH:mm:ss\");
        String formatTime = simpleDateFormat.format(longTime);
        return formatTime;
    }

    /**
     * 将字符串时间转换成毫秒数
     */
    public static Long formatStringTime(String strTime) {
        try {
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat(\"yyyy-MM-dd HH:mm:ss\");
            long formatTime = simpleDateFormat.parse(strTime).getTime();
            return formatTime;
        } catch (ParseException e) {
            e.printStackTrace();

        }
        return -1l;
    }

    /**
     *时间戳格式转换
     */

    static String dayNames[] = {\"周日\", \"周一\", \"周二\", \"周三\", \"周四\", \"周五\", \"周六\"};
    public static String getChatTime(long timesamp) {
        String result = \"\";
        Calendar todayCalendar = Calendar.getInstance();
        Calendar otherCalendar = Calendar.getInstance();
        otherCalendar.setTimeInMillis(timesamp);
        String timeFormat=\"M月d日 HH:mm\";
        String yearTimeFormat=\"yyyy年M月d日 HH:mm\";
        String am_pm=\"\";
        int hour=otherCalendar.get(Calendar.HOUR_OF_DAY);
        if(hour>=0&&hour<6){
            am_pm=\"凌晨\";
        }else if(hour>=6&&hour<12){
            am_pm=\"早上\";
        }else if(hour==12){
            am_pm=\"中午\";
        }else if(hour>12&&hour<18){
            am_pm=\"下午\";
        }else if(hour>=18){
            am_pm=\"晚上\";
        }
        boolean yearTemp = todayCalendar.get(Calendar.YEAR)==otherCalendar.get(Calendar.YEAR);
        if(yearTemp){
            int todayMonth=todayCalendar.get(Calendar.MONTH);
            int otherMonth=otherCalendar.get(Calendar.MONTH);
            if(todayMonth==otherMonth){//表示是同一个月
                int temp=todayCalendar.get(Calendar.DATE)-otherCalendar.get(Calendar.DATE);
                switch (temp) {
                    case 0:
                        result = am_pm+getHourAndMin(timesamp);
                        break;
                    case 1:
                        result = \"昨天 \" + getHourAndMin(timesamp);
                        break;
                    case 2:
                    case 3:
                    case 4:
                    case 5:
                    case 6:
                        int dayOfMonth = otherCalendar.get(Calendar.WEEK_OF_MONTH);
                        int todayOfMonth=todayCalendar.get(Calendar.WEEK_OF_MONTH);
                        if(dayOfMonth==todayOfMonth){//表示是同一周
                            int dayOfWeek=otherCalendar.get(Calendar.DAY_OF_WEEK);
                            if(dayOfWeek!=1){//判断当前是不是星期日     如想显示为：周日 12:09 可去掉此判断
                                result = dayNames[otherCalendar.get(Calendar.DAY_OF_WEEK)-1] + getHourAndMin(timesamp);
                            }else{
                                result = getTime(timesamp,timeFormat);
                            }
                        }else{
                            result = getTime(timesamp,timeFormat);
                        }
                        break;
                    default:
                        result = getTime(timesamp,timeFormat);
                        break;
                }
            }else{
                result = getTime(timesamp,timeFormat);
            }
        }else{
            result=getYearTime(timesamp,yearTimeFormat);
        }
        return result;
    }

    /**
     * 当天的显示时间格式
     * @param time
     * @return
     */
    public static String getHourAndMin(long time) {
        SimpleDateFormat format = new SimpleDateFormat(\"HH:mm\");
        return format.format(new Date(time));
    }

    /**
     * 不同一周的显示时间格式
     * @param time
     * @param timeFormat
     * @return
     */
    public static String getTime(long time,String timeFormat) {
        SimpleDateFormat format = new SimpleDateFormat(timeFormat);
        return format.format(new Date(time));
    }

    /**
     * 不同年的显示时间格式
     * @param time
     * @param yearTimeFormat
     * @return
     */
    public static String getYearTime(long time,String yearTimeFormat) {
        SimpleDateFormat format = new SimpleDateFormat(yearTimeFormat);
        return format.format(new Date(time));
    }

}