Android 时间计算工具 通用类TimeUtil

1.整体分析

1.1.源代码如下，可以直接Copy。

public class TimeUtil {
    private static final String TAG = "TimeUtil";

    public static String computePastTime(String time) {
        // Log.v(TAG, "computePastTime: " + time);
        String result = "刚刚";
        //2017-02-13T01:20:13.035+08:00
        time = time.replace("T", " ");
        time = time.substring(0, 22);
        // Log.v(TAG, "computePastTime time: " + time);
        SimpleDateFormat simpleDateFormat =
                new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.SIMPLIFIED_CHINESE);
        try {
            Date t = simpleDateFormat.parse(time);
            Date now = new Date(System.currentTimeMillis());
            long diff = (now.getTime() - t.getTime()) / 1000;
            if (diff < 60) {
                result = "刚刚";
            } else if ((diff /= 60) < 60) {
                result = diff + "分钟前";
            } else if ((diff /= 60) < 24) {
                result = diff + "小时前";
            } else if ((diff /= 24) < 30) {
                result = diff + "天前";
            } else if ((diff /= 30) < 12) {
                result = diff + "月前";
            } else {
                diff /= 12;
                result = diff + "年前";
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
        // Log.v(TAG, "computePastTime result: " + result);
        return result;
    }

    public static String formatTime(String time) {
        // Log.v(TAG, "formatTime: " + time);
        //2017-02-13T01:20:13.035+08:00
        time = time.replace("T", " ");
        time = time.substring(0, 16);
        // Log.v(TAG, "formatTime result: " + time);
        return time;
    }
}

1.2.主要方法

• computePastTime(String time)==>字符串转化为汉字的时间。
• formatTime(String time)==>格式化字符串时间

1.3.参考其他时间类。

public class MyTimeUtils {  

    //获取时间戳
    public static long getTime() {
        Calendar calendar = Calendar.getInstance();// 获取当前日历对象
        long unixTime = calendar.getTimeInMillis();// 获取当前时区下日期时间对应的时间戳
        return unixTime;
    }  

    public static String getTimeString() {
        return Long.toString(new Date().getTime());
    }  

    //获取标准时间
    public static String getStandardTime() {
        SimpleDateFormat formatter = new SimpleDateFormat(BaseApplication.getInstance().getString(R.string.date_show_type_one));
        Date curDate = new Date(System.currentTimeMillis());// 获取当前时间
        return formatter.format(curDate);
    }  

    // 获取与现在时间的时间差（秒）
    public static int getDurationSecond(String time) {
        int durationSecond = 0;
        SimpleDateFormat df = new SimpleDateFormat(<span style="font-family: SimHei;">"yyyy-MM-dd HH:mm:ss"</span>);
        Date date;
        try {
            date = df.parse(time);
            MyLog.i("TimeUtils getDurationSecond Date=" + new Date().toString());
            durationSecond = (int) ((new Date().getTime() - date.getTime()) / 1000);
        } catch (Exception e) {
            MyLog.e("TimeUtils getDurationSecond error=" + e);
        }
        return durationSecond;
    }  

    // 获取时间差
    public static String getDuration(String one, String two) {
        String duration = "";
        SimpleDateFormat df = new SimpleDateFormat(<span style="font-family: SimHei;">"yyyy-MM-dd HH:mm:ss"</span><span style="font-family: SimHei;">);</span>
        Date date1;
        Date date2;
        try {
            date1 = df.parse(one);
            date2 = df.parse(two);
            int l = (int) ((date2.getTime() - date1.getTime()) / 1000 / 60);
            if (l > 60) {
                int hr = l / 60;
                int min = l % 60;
                duration = <span style="font-family: SimHei;">hr + "小时" + min + "分钟"</span>;
            } else {
                duration = <span style="font-family: SimHei;">l + "分钟";</span>
            }
        } catch (Exception e) {
            e.printStackTrace();
        }  

        return duration;
    }  

    // 获取与当前时间差
    public static String getcurDuration(String one) {
        String duration = "";
        SimpleDateFormat df = new SimpleDateFormat(<span style="font-family: SimHei;">"yyyy-MM-dd HH:mm:ss"</span>);
        Date date1;
        Date date2;
        try {
            date1 = df.parse(one);
            date2 = new Date();
            int l = (int) ((date2.getTime() - date1.getTime()) / 1000 / 60);
            if (l > 60) {
                int hr = l / 60;
                int min = l % 60;
                duration = <span style="font-family: SimHei;">hr + "小时" + min + "分钟"</span><span style="font-family: SimHei;">;</span>
            } else {
                duration =<span style="font-family: SimHei;"> l + "分钟";</span>  

            }
        } catch (Exception e) {
            e.printStackTrace();
        }  

        return duration;
    }  

    /**
     * @return格式化当前日期和时间为字符串
     */
    public static String mCurrentTime() {
        SimpleDateFormat df = new SimpleDateFormat(<span style="font-family: SimHei;">"yyyy-MM-dd HH:mm:ss"</span>);
        String currenttime = df.format(new Date());
        return currenttime;
    }  

    public static String parseBangTime(long time) {
        MyLog.out("time==>" + time);
        String timeTemp = "";
        if (time < 60) {
            timeTemp = time + BaseApplication.getInstance().getString(R.string.seconds_before);
        } else if (time < (60 * 60)) {
            timeTemp = time / 60 + BaseApplication.getInstance().getString(R.string.minutes_before);
        } else if (time < (3600 * 24)) {
            timeTemp = time / 3600 + BaseApplication.getInstance().getString(R.string.hour_before);
        } else if (time < (60 * 60 * 24 * 30)) {
            timeTemp = time / (3600 * 24) + BaseApplication.getInstance().getString(R.string.today_before);
        } else {
            timeTemp = time / (3600 * 24 * 30) + BaseApplication.getInstance().getString(R.string.month_before);
        }
        return timeTemp;
    }  

    public static String getTimeStamp() {
        SimpleDateFormat dateFormat = new SimpleDateFormat(BaseApplication.getInstance().getString(R.string.date_show_type_two));
        String timeStamp = dateFormat.format(new Date());
        MyLog.e("getTimeStamp=" + timeStamp);
        return timeStamp;
    }  

    public static String getCurrentDate(){
        SimpleDateFormat df = new SimpleDateFormat(BaseApplication.getInstance().getString(R.string.date_show));
        String currentDate = df.format(new Date());
        return currentDate;
    }
} 

2.局部分析

2.1.字符串转化为汉字的时间

　　

　　服务器返回的时间一般是一个字符串，如：2017-02-13T01:20:13.035+08:00

　　然后我要解析这段字符串，首先将T变成空格，然后截取前22个字符即可

　　然后利用SimpleDataFormat转化一下想要的格式

　　然后将字符串转化为Date

　　然后比较Dta和当前的时间差

　　从小到大排序：刚刚、分钟前、小时前、天前、月前、年前。

　　

2.1.格式化字符串time

　　

　　这个函数的作用也是解析一段字符串：2017-02-13T01:20:13.035+08:00

　　然后替换T为空格

　　然后截取前16个字符即可。

3.案例

3.1.写一个测试函数

　　

　　当前时间为：2017-11-28 16：15

3.2.执行结果

　　

　　没问题，Over!