Android开发中怎么实现格式化时间

import Java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date;public class Test {public static void main(String[] args) {  System.out.println("当前时间："+new SimpleDateFormat("yyyy/M/d HH:mm:ss").format(System.currentTimeMillis()));  System.out.println("2016/2/1 05:05:00 显示为："+getNewChatTime(1454666700000l));  System.out.println("2017/2/1 05:05:00 显示为："+getNewChatTime(1485983100000l));  System.out.println("2017/2/4 12:05:00 显示为："+getNewChatTime(1486181100000l));  System.out.println("2017/2/5 10:10:00 显示为："+getNewChatTime(1486260600000l));  System.out.println("2017/2/5 13:12:00 显示为："+getNewChatTime(1486271520000l));  System.out.println("2017/2/6 14:05:00 显示为："+getNewChatTime(1486361100000l));  }static String dayNames[] = {"周日", "周一", "周二", "周三", "周四", "周五", "周六"};public static String getNewChatTime(long timesamp) {  String result = "";  Calendar todayCalendar = Calendar.getInstance();   Calendar otherCalendar = Calendar.getInstance();   otherCalendar.setTimeInMillis(timesamp);  String timeFormat="M月d日 HH:mm";  String yearTimeFormat="yyyy年M月d日 HH:mm";  String am_pm="";  int hour=otherCalendar.get(Calendar.HOUR_OF_DAY);  if(hour>=0&&hour<6){    am_pm="凌晨";  }else if(hour>=6&&hour<12){    am_pm="早上";  }else if(hour==12){    am_pm="中午";  }else if(hour>12&&hour<18){    am_pm="下午";  }else if(hour>=18){    am_pm="晚上";  }  timeFormat="M月d日 "+ am_pm +"HH:mm";  yearTimeFormat="yyyy年M月d日 "+ am_pm +"HH:mm";  boolean yearTemp = todayCalendar.get(Calendar.YEAR)==otherCalendar.get(Calendar.YEAR);  if(yearTemp){    int todayMonth=todayCalendar.get(Calendar.MONTH);    int otherMonth=otherCalendar.get(Calendar.MONTH);    if(todayMonth==otherMonth){//表示是同一个月      int temp=todayCalendar.get(Calendar.DATE)-otherCalendar.get(Calendar.DATE);      switch (temp) {      case 0:        result = getHourAndMin(timesamp);        break;      case 1:        result = "昨天 " + getHourAndMin(timesamp);        break;      case 2:      case 3:      case 4:      case 5:      case 6:        int dayOfMonth = otherCalendar.get(Calendar.WEEK_OF_MONTH);        int todayOfMonth=todayCalendar.get(Calendar.WEEK_OF_MONTH);        if(dayOfMonth==todayOfMonth){//表示是同一周          int dayOfWeek=otherCalendar.get(Calendar.DAY_OF_WEEK);          if(dayOfWeek!=1){//判断当前是不是星期日   如想显示为：周日 12:09 可去掉此判断            result = dayNames[otherCalendar.get(Calendar.DAY_OF_WEEK)-1] + getHourAndMin(timesamp);          }else{            result = getTime(timesamp,timeFormat);          }        }else{           result = getTime(timesamp,timeFormat);        }        break;      default:        result = getTime(timesamp,timeFormat);        break;      }    }else{      result = getTime(timesamp,timeFormat);    }  }else{    result=getYearTime(timesamp,yearTimeFormat);  }  return result;}public static String getHourAndMin(long time) {  SimpleDateFormat format = new SimpleDateFormat("HH:mm");  return format.format(new Date(time));}public static String getTime(long time,String timeFormat) {  SimpleDateFormat format = new SimpleDateFormat(timeFormat);  return format.format(new Date(time));}public static String getYearTime(long time,String yearTimeFormat) {  SimpleDateFormat format = new SimpleDateFormat(yearTimeFormat);  return format.format(new Date(time));}}