仿微信的IM聊天时间显示格式(含iOS/Android/Web实现)[图文+源码]

时间:2025-03-31 09:27:08

/**

 * 返回指定pattern样的日期时间字符串。

 *

 * @param dt

 * @param pattern

 * @return 如果时间转换成功则返回结果,否则返回空字符串""

 * @author 即时通讯网([url=http://]http://[/url])

 */

publicstaticString getTimeString(Date dt, String pattern)

{

        try

        {

                SimpleDateFormat sdf = newSimpleDateFormat(pattern);//"yyyy-MM-dd HH:mm:ss"

                (());

                (dt);

        }

        catch(Exception e)

        {

                return"";

        }

}

 

/**

* 仿照微信中的消息时间显示逻辑,将时间戳(单位:毫秒)转换为友好的显示格式.

* <p>

* 1)7天之内的日期显示逻辑是:今天、昨天(-1d)、前天(-2d)、星期?(只显示总计7天之内的星期数,即<=-4d);<br>

* 2)7天之外(即>7天)的逻辑:直接显示完整日期时间。

*

* @param srcDate 要处理的源日期时间对象

* @param mustIncludeTime true表示输出的格式里一定会包含“时间:分钟”,否则不包含(参考微信,不包含时分的情况,用于首页“消息”中显示时)

* @return 输出格式形如:“10:30”、“昨天 12:04”、“前天 20:51”、“星期二”、“2019/2/21 12:09”等形式

* @author 即时通讯网([url=http://]http://[/url])

* @since 4.5

*/

publicstaticString getTimeStringAutoShort2(Date srcDate, booleanmustIncludeTime)

{

        String ret = "";

 

        try

        {

                GregorianCalendar gcCurrent = newGregorianCalendar();

                (newDate());

                intcurrentYear = ();

                intcurrentMonth = ()+1;

                intcurrentDay = (GregorianCalendar.DAY_OF_MONTH);

 

                GregorianCalendar gcSrc = newGregorianCalendar();

                (srcDate);

                intsrcYear = ();

                intsrcMonth = ()+1;

                intsrcDay = (GregorianCalendar.DAY_OF_MONTH);

 

                // 要额外显示的时间分钟

                String timeExtraStr = (mustIncludeTime?" "+getTimeString(srcDate, "HH:mm"):"");

 

                // 当年

                if(currentYear == srcYear)

                {

                        longcurrentTimestamp = ();

                        longsrcTimestamp = ();

 

                        // 相差时间(单位:毫秒)

                        longdelta = (currentTimestamp - srcTimestamp);

 

                        // 当天(月份和日期一致才是)

                        if(currentMonth == srcMonth && currentDay == srcDay)

                        {

                                // 时间相差60秒以内

                                if(delta < 60* 1000)

                                           ret = "刚刚";

                                // 否则当天其它时间段的,直接显示“时:分”的形式

                                else

                                            ret = getTimeString(srcDate, "HH:mm");

                        }

                        // 当年 && 当天之外的时间(即昨天及以前的时间)

                        else

                        {

                                // 昨天(以“现在”的时候为基准-1天)

                                GregorianCalendar yesterdayDate = newGregorianCalendar();

                                (GregorianCalendar.DAY_OF_MONTH, -1);

 

                                // 前天(以“现在”的时候为基准-2天)

                                GregorianCalendar beforeYesterdayDate = newGregorianCalendar();

                                (GregorianCalendar.DAY_OF_MONTH, -2);

 

                                // 用目标日期的“月”和“天”跟上方计算出来的“昨天”进行比较,是最为准确的(如果用时间戳差值

                                // 的形式,是不准确的,比如:现在时刻是2019年02月22日1:00、而srcDate是2019年02月21日23:00,

                                // 这两者间只相差2小时,直接用“delta/(3600 * 1000)” > 24小时来判断是否昨天,就完全是扯蛋的逻辑了)

                                if(srcMonth == (()+1)

                                        && srcDay == (GregorianCalendar.DAY_OF_MONTH))

                                {

                                            ret = "昨天"+timeExtraStr;// -1d

                                }

                                // “前天”判断逻辑同上

                                elseif(srcMonth == (()+1)

                                        && srcDay == (GregorianCalendar.DAY_OF_MONTH))

                                {

                                            ret = "前天"+timeExtraStr;// -2d

                                }

                                else

                                {

                                            // 跟当前时间相差的小时数

                                            longdeltaHour = (delta/(3600* 1000));

 

                                            // 如果小于 7*24小时就显示星期几

                                            if(deltaHour < 7*24)

                                            {

                                                String[] weekday = {"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};

 

                                                // 取出当前是星期几

                                                String weedayDesc = weekday[(GregorianCalendar.DAY_OF_WEEK)-1];

                                                ret = weedayDesc+timeExtraStr;

                                            }

                                            // 否则直接显示完整日期时间

                                            else

                                                ret = getTimeString(srcDate, "yyyy/M/d")+timeExtraStr;

                                }

                        }

            }

            else

                ret = getTimeString(srcDate, "yyyy/M/d")+timeExtraStr;

        }

        catch(Exception e)

        {

                ("【DEBUG-getTimeStringAutoShort】计算出错:"+()+" 【NO】");

        }

 

        returnret;

}