TimeUtil.java

package com.lh.fly.common.date;

import android.text.TextUtils;

import com.lh.fly.App;
import com.lh.fly.R;

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

public class TimeUtil {

    private static final String LINE = "-";

    public static final long SECOND = 1000;
    public static final long MIN = 60 * SECOND;
    public static final long HOUR = 6  * MIN;
    public static final long DAY = 24 * HOUR;

    // Wed May 27 12:35:20 +0800 2015
    public static String getFormatTime(String timeStr) {
        StringBuilder sb = new StringBuilder();
        try {
            if (!TextUtils.isEmpty(timeStr)) {
                String[] timeArr = timeStr.split("\\s+");

                String year = timeArr[timeArr.length - 1];
                String date = getMonthNum(timeArr[1]) + LINE + timeArr[2];
                String time = timeArr[3].substring(0, 5);

                SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
                Date d = simpleDateFormat.parse(year + LINE + date + " " + time);

                int y = Integer.valueOf(year);
                int currentYear = Calendar.getInstance().get(Calendar.YEAR);
                if (currentYear != y) {  // 如果不是当前年份
                    sb.append(currentYear);
                } else {    // 如果是本年
                    long diff = d.getTime() - System.currentTimeMillis();
                    if (diff > DAY * 2) {
                        sb.append(date);
                    } else if (diff > DAY) {
                        sb.append(App.getAppContext().getResources().getString(R.string.yesterday))
                            .append(" ")
                            .append(time);
                    } else if (diff > HOUR) {
                        long hours = diff / HOUR;
                        String hourAgo = String.format(
                                App.getAppContext().getResources().getString(R.string.hour_ago),
                                hours);
                        sb.append(hourAgo);
                    } else {
                        sb.append(time);
                    }
                }
            }
            return sb.toString();
        } catch (Exception e) {
            return null;
        }
    }

    private static String getMonthNum(String monEn) {
        String mothNum = "00";
        switch (monEn) {
            case "Jan":
                mothNum = "01";
                break;
            case "Feb":
                mothNum = "02";
                break;
            case "Mar":
                mothNum = "03";
                break;
            case "Apr":
                mothNum = "04";
                break;
            case "May":
                mothNum = "05";
                break;
            case "Jun":
                mothNum = "06";
                break;
            case "Jul":
                mothNum = "07";
                break;
            case "Aug":
                mothNum = "08";
                break;
            case "Sep":
                mothNum = "09";
                break;
            case "Oct":
                mothNum = "10";
                break;
            case "Nov":
                mothNum = "11";
                break;
            case "Dec":
                mothNum = "12";
                break;
        }
        return mothNum;
    }

}