java - 如何从美国时间获取android中的反向时间

Question

package com.example.currenttime;

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

public class Functions {

    private static long converTimeStringINToMillis1(String time) {

        long milliseconds = 0;

        try {
            SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");
            sdf.setTimeZone(TimeZone.getTimeZone("UTC"));

            // 25/06/2014 8:41:26

            Date date;

            date = sdf.parse(time);
            milliseconds = date.getTime();
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            milliseconds = 0;
            e.printStackTrace();
        }

        return milliseconds;
    }

    public static String setLastSeenTime1(String time) {

        long milliseconds = Math.abs(System.currentTimeMillis()
                - converTimeStringINToMillis1(time));
        String lastSeen = "";

        int seconds = (int) milliseconds / 1000;
        if (seconds < 60)
            lastSeen = String.valueOf(seconds) + "sec ago";
        else if (seconds > 60 && seconds < 3600)
            lastSeen = String.valueOf((int) seconds / 60) + " min ago";
        else if (seconds > 3600 && seconds < 86400)
            lastSeen = String.valueOf((int) seconds / 3600) + " hours ago";
        else if (seconds > 86400 && seconds < 172800)
            lastSeen = " Yesterday";
        else if (seconds > 172800 && seconds < 2592000)
            lastSeen = String.valueOf((int) (seconds / (24 * 3600)))
                    + " days ago";
        else if (seconds > 2592000)
            lastSeen = String.valueOf((int) (seconds / (30 * 24 * 3600)))
                    + " months ago";

        return lastSeen;

    }

}

我有显示反向时间我调用这个函数使用这个android代码:

btn_retry.setText(Functions.setLastSeenTime1("09/10/2014 8:41:26 AM"))

但问题是我正在获取位于美国的服务器时间，我必须根据本地时区显示，以便我可以看到弹出时间，请建议我如何做，哪里做错了，请帮助。

Answer 1

更新: 这应该可行，只需在实用程序类中替换它，您只需传递时间和 serverTimeZone 即可。

public static String setLastSeenTime1(String time, TimeZone serverTimeZone) throws  ParseException {

   SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");
   sdf.setTimeZone(serverTimeZone);

   SimpleDateFormat sdf2 = new SimpleDateFormat("MM/dd/yyyy hh:mm:ss a");
   sdf.setTimeZone(TimeZone.getDefault());

   return sdf2.format(sdf.parse(time));

}