之前很是头疼聊天显示时间的问题，什么上午、下午、晚上、凌晨，昨天，两天前，三天前的，因此整理一个工具类分享下：
1 package com.mogujie.tt.utils; 2 3 import java.text.ParseException; 4 import java.text.SimpleDateFormat; 5 import java.util.Calendar; 6 import java.util.Date; 7 import java.util.Locale; 8 9 import android.annotation.SuppressLint; 10 11 /** 12 * @Description 13 * @author Nana 14 * @date 2014-4-10 15 */ 16 public class DateUtil { 17 18 private static Date preRefreshDateTime; 19 20 public static boolean toRefresh() { 21 Date curdate = new Date(); 22 if (null == preRefreshDateTime) { 23 preRefreshDateTime = curdate; 24 return true; 25 } 26 27 long timediff = (curdate.getTime() - preRefreshDateTime.getTime()); 28 preRefreshDateTime = curdate; 29 return (timediff >= 60 * 60 * 1000); 30 } 31 32 @SuppressLint("SimpleDateFormat") 33 public static Date getDate(Long dateLong) { 34 SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 35 String d = format.format(dateLong); 36 Date date; 37 try { 38 date = format.parse(d); 39 } catch (ParseException e) { 40 e.printStackTrace(); 41 return null; 42 } 43 return date; 44 } 45 46 public static boolean needDisplayTime(Date predate, Date curdate) { 47 if (predate == null || curdate == null) { 48 return true; 49 } 50 51 long timediff = (curdate.getTime() - predate.getTime()); 52 return (timediff >= 5 * 60 * 1000); 53 } 54 55 public static String getTimeDiffDesc(Date date) { 56 57 if (date == null) { 58 return null; 59 } 60 61 String strDesc = null; 62 Calendar curCalendar = Calendar.getInstance(); 63 Date curDate = new Date(); 64 curCalendar.setTime(curDate); 65 Calendar thenCalendar = Calendar.getInstance(); 66 thenCalendar.setTime(date); 67 68 String[] weekDays = { 69 "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" 70 }; 71 int w = thenCalendar.get(Calendar.DAY_OF_WEEK) - 1; 72 if (w < 0) 73 w = 0; 74 // SimpleDateFormat format = new 75 // SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 76 Calendar current = Calendar.getInstance(); 77 Calendar today = Calendar.getInstance(); // 今天 78 today.set(Calendar.YEAR, current.get(Calendar.YEAR)); 79 today.set(Calendar.MONTH, current.get(Calendar.MONTH)); 80 today.set(Calendar.DAY_OF_MONTH, current.get(Calendar.DAY_OF_MONTH)); 81 today.set(Calendar.HOUR_OF_DAY, 0); 82 today.set(Calendar.MINUTE, 0); 83 today.set(Calendar.SECOND, 0); 84 // Date datetoday = today.getTime(); 85 // System.out.println(format.format(datetoday)); 86 87 Calendar yesterday = Calendar.getInstance(); // 昨天 88 yesterday.setTime(curDate); 89 yesterday.add(Calendar.DATE, -1); 90 yesterday.set(Calendar.HOUR_OF_DAY, 0); 91 yesterday.set(Calendar.MINUTE, 0); 92 yesterday.set(Calendar.SECOND, 0); 93 // Date dateyestoday = yesterday.getTime(); 94 // System.out.println(format.format(dateyestoday)); 95 96 Calendar sevendaysago = Calendar.getInstance(); // 7天 97 sevendaysago.setTime(curDate); 98 sevendaysago.add(Calendar.DATE, -7); 99 sevendaysago.set(Calendar.HOUR_OF_DAY, 0); 100 sevendaysago.set(Calendar.MINUTE, 0); 101 sevendaysago.set(Calendar.SECOND, 0); 102 // Date datesevenago = sevendaysago.getTime(); 103 // System.out.println(format.format(datesevenago)); 104 /* 105 * Date tasktime = yesterday.getTime(); SimpleDateFormat df=new 106 * SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 107 * System.out.println(df.format(tasktime)); 108 */ 109 110 int thenMonth = thenCalendar.get(Calendar.MONTH); 111 int thenDay = thenCalendar.get(Calendar.DAY_OF_MONTH); 112 int h = thenCalendar.get(Calendar.HOUR_OF_DAY); 113 int m = thenCalendar.get(Calendar.MINUTE); 114 String sh = "", sm = ""; 115 if (h < 10) 116 sh = "0"; 117 118 if (m < 10) 119 sm = "0"; 120 if (thenCalendar.after(today))// today 121 { 122 if (h < 6) { 123 strDesc = "凌晨 " + sh + h + " : " + sm + m; 124 } else if (h < 12) { 125 strDesc = "上午 " + sh + h + " : " + sm + m; 126 } else if (h < 13) { 127 strDesc = "下午 " + h + " : " + sm + m; 128 } else if (h < 19) { 129 strDesc = "下午 " + (h - 12) + " : " + sm + m; 130 } else { 131 strDesc = "晚上 " + (h - 12) + " : " + sm + m; 132 } 133 } else if (thenCalendar.before(today) && thenCalendar.after(yesterday)) {// yestoday 134 // System.out.println("yestoday"); 135 if (h < 6) { 136 strDesc = "昨天凌晨 " + sh + h + " : " + sm + m; 137 } else if (h < 12) { 138 strDesc = "昨天上午 " + sh + h + " : " + sm + m; 139 } else if (h < 13) { 140 strDesc = "昨天下午 " + h + " : " + sm + m; 141 } else if (h < 19) { 142 strDesc = "昨天下午 " + (h - 12) + " : " + sm + m; 143 } else { 144 strDesc = "昨天晚上 " + (h - 12) + " : " + sm + m; 145 } 146 } else if (thenCalendar.before(yesterday) 147 && thenCalendar.after(sevendaysago)) {// 2 ~ 7days ago 148 // System.out.println("2~7"); 149 if (h < 6) { 150 strDesc = weekDays[w] + "凌晨 " + sh + h + " : " + sm + m; 151 } else if (h < 12) { 152 strDesc = weekDays[w] + "上午 " + sh + h + " : " + sm + m; 153 } else if (h < 13) { 154 strDesc = weekDays[w] + "下午 " + h + " : " + sm + m; 155 } else if (h < 19) { 156 strDesc = weekDays[w] + "下午 " + (h - 12) + " : " + sm + m; 157 } else { 158 strDesc = weekDays[w] + "晚上 " + (h - 12) + " : " + sm + m; 159 } 160 } else { 161 // System.out.println("7~"); 162 if (h < 6) { 163 strDesc = (thenMonth + 1) + "月" + thenDay + "日" + "凌晨 " + sh 164 + h + " : " + sm + m; 165 } else if (h < 12) { 166 strDesc = (thenMonth + 1) + "月" + thenDay + "日" + "上午 " + sh 167 + h + " : " + sm + m; 168 } else if (h < 13) { 169 strDesc = (thenMonth + 1) + "月" + thenDay + "日" + "下午 " + h 170 + " : " + sm + m; 171 } else if (h < 19) { 172 strDesc = (thenMonth + 1) + "月" + thenDay + "日" + "下午 " 173 + (h - 12) + " : " + sm + m; 174 } else { 175 strDesc = (thenMonth + 1) + "月" + thenDay + "日" + "晚上 " 176 + (h - 12) + " : " + sm + m; 177 } 178 } 179 // System.out.println(strDesc); 180 return strDesc; 181 } 182 183 public static String getTimeDisplay(Date date) { 184 185 if (date == null) { 186 return null; 187 } 188 189 String strDesc = null; 190 Calendar curCalendar = Calendar.getInstance(); 191 Date curDate = new Date(); 192 curCalendar.setTime(curDate); 193 Calendar thenCalendar = Calendar.getInstance(); 194 thenCalendar.setTime(date); 195 196 String[] weekDays = { 197 "星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" 198 }; 199 int w = thenCalendar.get(Calendar.DAY_OF_WEEK) - 1; 200 if (w < 0) 201 w = 0; 202 // SimpleDateFormat format = new 203 // SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); 204 Calendar current = Calendar.getInstance(); 205 Calendar today = Calendar.getInstance(); // 今天 206 today.set(Calendar.YEAR, current.get(Calendar.YEAR)); 207 today.set(Calendar.MONTH, current.get(Calendar.MONTH)); 208 today.set(Calendar.DAY_OF_MONTH, current.get(Calendar.DAY_OF_MONTH)); 209 today.set(Calendar.HOUR_OF_DAY, 0); 210 today.set(Calendar.MINUTE, 0); 211 today.set(Calendar.SECOND, 0); 212 213 Calendar yesterday = Calendar.getInstance(); // 昨天 214 yesterday.setTime(curDate); 215 yesterday.add(Calendar.DATE, -1); 216 yesterday.set(Calendar.HOUR_OF_DAY, 0); 217 yesterday.set(Calendar.MINUTE, 0); 218 yesterday.set(Calendar.SECOND, 0); 219 220 Calendar sevendaysago = Calendar.getInstance(); // 7天 221 sevendaysago.setTime(curDate); 222 sevendaysago.add(Calendar.DATE, -7); 223 sevendaysago.set(Calendar.HOUR_OF_DAY, 0); 224 sevendaysago.set(Calendar.MINUTE, 0); 225 sevendaysago.set(Calendar.SECOND, 0); 226 227 long timediff = (curDate.getTime() - date.getTime()); 228 int theYear = thenCalendar.get(Calendar.YEAR); 229 int thenMonth = thenCalendar.get(Calendar.MONTH); 230 int thenDay = thenCalendar.get(Calendar.DAY_OF_MONTH); 231 if (thenCalendar.after(today))// today 232 { 233 if (timediff < 5 * 60 * 1000) { 234 strDesc = "刚刚"; 235 } else if (timediff < 60 * 60 * 1000) { 236 strDesc = (timediff / 60 / 1000) + "分钟之前"; 237 } else { 238 strDesc = (timediff / 3600 / 1000) + "小时之前"; 239 } 240 } else if (thenCalendar.before(today) && thenCalendar.after(yesterday)) {// yestoday 241 strDesc = "昨天"; 242 } else if (thenCalendar.before(yesterday) 243 && thenCalendar.after(sevendaysago)) {// 2 ~ 7days ago 244 strDesc = weekDays[w]; 245 } else { 246 strDesc = "" + (theYear - 2000) + "-" + (thenMonth + 1) + "-" 247 + thenDay; 248 } 249 return strDesc; 250 } 251 252 public static String getTime4TimeTitle(Date date) { 253 // M:月 d:天 a:上午或下午 h:12小时制的小时 m:分钟 254 SimpleDateFormat format = new SimpleDateFormat("MM-dd a hh:mm", 255 Locale.CHINA); 256 return format.format(date); 257 } 258 259 public static int getCurTimeStamp() { 260 261 return (int) (System.currentTimeMillis() / 1000); 262 263 } 264 }