Android/Java仿微信按时间长短分类显示时间戳

原文：https://blog.csdn.net/uyy203/article/details/54441313

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
 
/**
 * Created by xyz on 2017/1/9.
 */
 
public class DateTime {
    private int hour;
    private int day;
    private Date date;
    private DateFormat df;
    private String pointText;
    private Long time;
    private Long now;
//    private
 
public DateTime(){
    hour=60*60*1000;
    day=(60*60*24)*1000;
    time=28800L;
    now=new Date().getTime();
    pointText="1970-01-01";
 
 
    }
 
 
 
    //获得当天0点时间
    public static Long getTimesmorning(){
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return (Long) cal.getTimeInMillis();
    }
 
 
    //获取星期几
    public static String getWeekOfDate(Date dt) {
        String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
        Calendar cal = Calendar.getInstance();
        cal.setTime(dt);
        int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
        if (w < 0)
            w = 0;
        return weekDays[w];
    }
 
    //获取时间点
    public String getTimePoint(Long time) {
        //现在时间
        now = new Date().getTime();
 
 
        //时间点比当天零点早
        if (time <= now&&time!=null) {
            date = new Date(time);
            if (time < getTimesmorning()) {
                if (time >= getTimesmorning() - day) {//比昨天零点晚
                    pointText ="昨天";
                    return pointText;
                } else {//比昨天零点早
                    if (time >= getTimesmorning() - 6 * day) {//比七天前的零点晚，显示星期几
 
                        return getWeekOfDate(date);
                    } else {//显示具体日期
                        df = new SimpleDateFormat("yyyy-MM-dd");
                        pointText = df.format(date);
                        return pointText;
                    }
                }
 
            } else {//无日期时间,当天内具体时间
                df = new SimpleDateFormat("HH:mm");
                pointText = df.format(date);
                return pointText;
 
            }
 
        }
 
        return pointText;
    }
 
 
 
}

一般外部调用getTimePoint(Long time) 传入Long 型时间戳即可

仿照微信的时间戳显示规则

当天的显示无日期具体时间；

昨天的显示为昨天；

比昨天早且在过去一周内的，显示星期几；

超过一周的时间，显示带有年月日的日期。