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Android中基於XMPP協議實現IM聊天程序與多人聊天室

編輯：關於Android編程

簡單的IM聊天程序
由於項目需要做一個基於XMPP協議的Android通訊軟件。故開始研究XMPP。
XMPP協議采用的是客戶端-服務器架構，所有從一個客戶端發到另一個客戶端的消息和數據都必須經過XMPP服務器轉發，而且支持服務器間DNS的路由，也就是說可以構建服務器集群，使不同的

服務器下的客戶端也可以通信，XMPP的前身是一個開源組織制定的網絡通信協議——Jabber，XMPP的核心是在網絡上分片段發送XML流的協議，這個協議是XMPP的即時通訊指令的傳遞手段。
為了防止服務器間發送的數據被篡改或偷聽，XMPP服務器通信引入了TLS機制，使用TLS機制能實現數據的加密，從而保證了在數據傳輸過程種數據的安全。
一個XMPP實體的地址稱為Jabber Identifier或JID，作用類似於IP地址。一個合法的JID包括節點名,域名資源名，其格式為：jid=[node'@']domain['/'resource]

XMPP協議的命名空間：

jabber:iq:private -- 私有數據存儲，用於本地用戶私人設置信息，比如用戶備注等。
jabber:iq:conference -- 一般會議，用於多個用戶之間的信息共享
jabber:x:encrypted -- 加密的消息，用於發送加密消息
jabber:x:expire -- 消息終止
jabber:iq:time -- 客戶端時間
jabber:iq:auth -- 簡單用戶認證，一般用於服務器之間或者服務器和客戶端之間的認證
jabber:x:roster -- 內部花名冊
jabber:x:signed -- 標記的在線狀態
jabber:iq:search -- 用戶數據庫查詢，用於向服務器發送查詢請求
jabber:iq:register -- 注冊請求，用於用戶注冊相關信息
jabber:x:iq:roster -- 花名冊管理
jabber:x:conference -- 會議邀請，用於向參加會議用戶發送開會通知
jabber:x:event -- 消息事件
vcard-temp -- 臨時的vCard,用於設置用戶的頭像以及昵稱等

在網上找了下，有開源的項目BEEM，開源的用於android的xmpp框架asmack，asmack是smack的android版本。現在開始學習smack

。Xmpp就是神馬東西，就不廢話了。首先在網上下一個Openfire和Spack，不知道這兩個是什麼東西，就直接google吧。安裝openfire需要mysql的支持，當然，oracle，sqlserver肯定是可以的。還是先上圖吧：

Openfire + Spark + MyXMPPP

2016224155319690.gif (1024×394)

2016224155354184.gif (518×647)

import java.io.InputStreamReader; 
import java.util.Collection; 
 
import org.jivesoftware.smack.Chat; 
import org.jivesoftware.smack.ChatManager; 
import org.jivesoftware.smack.ChatManagerListener; 
import org.jivesoftware.smack.ConnectionConfiguration; 
import org.jivesoftware.smack.MessageListener; 
import org.jivesoftware.smack.PrivacyListManager; 
import org.jivesoftware.smack.Roster; 
import org.jivesoftware.smack.RosterEntry; 
import org.jivesoftware.smack.RosterGroup; 
import org.jivesoftware.smack.RosterListener; 
import org.jivesoftware.smack.XMPPConnection; 
import org.jivesoftware.smack.packet.Message; 
import org.jivesoftware.smack.packet.Presence; 
 
public class TestSmack { 
  public static void main(String[] args) {XMPPConnection.DEBUG_ENABLED = true; 
    //我的電腦IP:10.16.25.90 
    final ConnectionConfiguration connectionConfig = new ConnectionConfiguration("10.16.25.91", 5222, ""); 
    connectionConfig.setSASLAuthenticationEnabled(false); 
        try { 
           
          XMPPConnection connection = new XMPPConnection(connectionConfig); 
          connection.connect();//連接 
          connection.login("test", "test");//登陸 
          System.out.println(connection.getUser()); 
          ChatManager chatmanager = connection.getChatManager(); 
 
          //新建一個會話 
          Chat newChat = chatmanager.createChat("test3@pc2010102716", new MessageListener() { 
            public void processMessage(Chat chat, Message message) { 
              System.out.println("Received from 【" + message.getFrom() + "】 message: " + message.getBody()); 
            } 
          }); 
           
          // 監聽被動接收消息，或廣播消息監聽器 
          chatmanager.addChatListener(new ChatManagerListener() { 
            @Override 
            public void chatCreated(Chat chat, boolean createdLocally) { 
              chat.addMessageListener(new MessageListener() { 
                @Override 
                public void processMessage(Chat chat, Message message) { 
                  System.out.println("Received from 【" + message.getFrom() + "】 message: " + message.getBody()); 
                } 
                   
              }); 
            } 
          }); 
          //發送消息 
          newChat.sendMessage("我是菜鳥"); 
           
          //獲取花名冊 
          Roster roster = connection.getRoster(); 
          Collection<RosterEntry> entries = roster.getEntries(); 
          for(RosterEntry entry : entries) { 
            System.out.print(entry.getName() + " - " + entry.getUser() + " - " + entry.getType() + " - " + entry.getGroups().size()); 
            Presence presence = roster.getPresence(entry.getUser()); 
            System.out.println(" - " + presence.getStatus() +" - "+ presence.getFrom()); 
          } 
           
          //添加花名冊監聽器，監聽好友狀態的改變。 
          roster.addRosterListener(new RosterListener() { 
 
            @Override 
            public void entriesAdded(Collection<String> addresses) { 
              System.out.println("entriesAdded"); 
            } 
 
            @Override 
            public void entriesUpdated(Collection<String> addresses) { 
              System.out.println("entriesUpdated"); 
            } 
 
            @Override 
            public void entriesDeleted(Collection<String> addresses) { 
              System.out.println("entriesDeleted"); 
            } 
 
            @Override 
            public void presenceChanged(Presence presence) { 
              System.out.println("presenceChanged - >" + presence.getStatus()); 
            } 
             
          }); 
           
          //創建組 
//         /RosterGroup group = roster.createGroup("大學"); 
//         for(RosterEntry entry : entries) { 
//           group.addEntry(entry); 
//         } 
          for(RosterGroup g : roster.getGroups()) { 
            for(RosterEntry entry : g.getEntries()) { 
              System.out.println("Group " +g.getName() +" >> " + entry.getName() + " - " + entry.getUser() + " - " + entry.getType() + " - " + entry.getGroups().size()); 
            } 
          } 
           
          //發送消息 
          BufferedReader cmdIn = new BufferedReader(new InputStreamReader(System.in)); 
          while(true) { 
           try { 
             String cmd = cmdIn.readLine(); 
             if("!q".equalsIgnoreCase(cmd)) { 
               break; 
             } 
             newChat.sendMessage(cmd); 
           }catch(Exception ex) { 
           } 
          } 
          connection.disconnect(); 
          System.exit(0); 
        } catch (Exception e) { 
          e.printStackTrace(); 
        } 
  } 
}

以上代碼如果在一般的Java Project上運行需要加入smack.jar 和klmx2.jar,如果是Android Project，基本代碼不需改變只需將其放入onCreate(...)方法下即可，需要加入asmack.jar包.

1、ConnectionConfiguration
作為用於與XMPP服務建立連接的配置。它能配置；連接是否使用TLS，SASL加密。
包含內嵌類：ConnectionConfiguration.SecurityMode

2、XMPPConnection.
XMPPConnection這個類用來連接XMPP服務.
可以使用connect()方法建立與服務器的連接。disconnect()方法斷開與服務器的連接.
在創建連接前可以使用XMPPConnection.DEBUG_ENABLED = true; 使開發過程中可以彈出一個GUI窗口，用於顯示我們的連接與發送Packet的信息。

2016224155444002.gif (713×349)

3、ChatManager
用於監控當前所有chat。可以使用createChat(String userJID, MessageListener listener)創建一個聊天。

4、Chat
Chat用於監控兩個用戶間的一系列message。使用addMessageListener(MessageListener listener)當有任何消息到達時將會觸發listener的processMessage(Chat chat, Message message)
方法.
我們可以使用sendMessage()發送消息,這個方法有兩個重載方法，一種類類型的參數時String類型，另一種則是傳入Message對象(後面介紹)。
那麼有這樣一種情況，當別人主動跟我們建立連接發送消息，或者系統發送消息時我們怎麼才能接收消息呢？
我現在是這樣操作的：

 chatmanager.addChatListener(new ChatManagerListener() {
 @Override
 public void chatCreated(Chat chat, boolean createdLocally) {
  chat.addMessageListener(new MessageListener() {
  @Override
  public void processMessage(Chat chat, Message message) {
   System.out.println("Received message: " + message.getBody());
  }
     
  });
 }
 });

5、Message

Message用於表示一個消息包(可以用調試工具看到發送包和接收包的具體內容)。它有以下多種類型。
Message.Type.NORMAL -- （默認）文本消息（比如郵件）
Message.Type.CHAT -- 典型的短消息，如QQ聊天的一行一行顯示的消息
Message.Type.GROUP_CHAT -- 群聊消息
Message.Type.HEADLINE -- 滾動顯示的消息
Message.TYPE.ERROR -- 錯誤的消息
Message有兩個內部類：
Message.Body -- 表示消息體
Message.Type -- 表示消息類型

6、Roster
表示存儲了很多RosterEntry的一個花名冊.為了易於管理，花名冊的項被分貝到了各個group中.
當建立與XMPP服務的連接後可以使用connection.getRoster()獲取Roster對象。
別的用戶可以使用一個訂閱請求(相當於QQ加好友)嘗試訂閱目的用戶。可以使用枚舉類型Roster.SubscriptionMode的值處理這些請求：
accept_all: 接收所有訂閱請求
reject_all：拒絕所有訂閱請求
manual：手工處理訂閱請求

創建組：RosterGroup group = roster.createGroup("大學");
向組中添加RosterEntry對象: group.addEntry(entry);

7、RosterEntry
表示Roster（花名冊）中的每條記錄.它包含了用戶的JID，用戶名，或用戶分配的昵稱.

8、RosterGroup
表示RosterEntry的組。可以使用addEntry(RosterEntry entry)添加。contains(String user) 判斷某用戶是否在組中.當然removeEntry(RosterEntry entry)就是從組中移除了。getEntries()

獲取所有RosterEntry.

9、Presence
表示XMPP狀態的packet。每個presence packet都有一個狀態。用枚舉類型Presence.Type的值表示：
available -- （默認）用戶空閒狀態
unavailable -- 用戶沒空看消息
subscribe -- 請求訂閱別人，即請求加對方為好友
subscribed -- 統一被別人訂閱，也就是確認被對方加為好友
unsubscribe -- 他取消訂閱別人，請求刪除某好友
unsubscribed -- 拒絕被別人訂閱，即拒絕對放的添加請求
error -- 當前狀態packet有錯誤
內嵌兩個枚舉類型:Presence.Mode和Presence.Type.
可以使用setStatus自定義用戶當前的狀態（像QQ一樣的)

MultiUserChat聊天室

import java.io.BufferedReader;  
import java.io.InputStreamReader;  
import java.util.ArrayList;  
import java.util.Collection;  
import java.util.Iterator;  
import java.util.List;  
 
import org.jivesoftware.smack.Chat;  
import org.jivesoftware.smack.ConnectionConfiguration;  
import org.jivesoftware.smack.MessageListener;  
import org.jivesoftware.smack.PacketListener;  
import org.jivesoftware.smack.SmackConfiguration;  
import org.jivesoftware.smack.XMPPConnection;  
import org.jivesoftware.smack.XMPPException;  
import org.jivesoftware.smack.packet.Message;  
import org.jivesoftware.smack.packet.Packet;  
import org.jivesoftware.smack.provider.ProviderManager;  
import org.jivesoftware.smackx.Form;  
import org.jivesoftware.smackx.FormField;  
import org.jivesoftware.smackx.ServiceDiscoveryManager;  
import org.jivesoftware.smackx.muc.DefaultParticipantStatusListener;  
import org.jivesoftware.smackx.muc.DefaultUserStatusListener;  
import org.jivesoftware.smackx.muc.DiscussionHistory;  
import org.jivesoftware.smackx.muc.HostedRoom;  
import org.jivesoftware.smackx.muc.InvitationListener;  
import org.jivesoftware.smackx.muc.InvitationRejectionListener;  
import org.jivesoftware.smackx.muc.MultiUserChat;  
import org.jivesoftware.smackx.muc.RoomInfo;  
import org.jivesoftware.smackx.muc.SubjectUpdatedListener;  
import org.jivesoftware.smackx.packet.ChatStateExtension;  
import org.jivesoftware.smackx.packet.DiscoverInfo;  
import org.jivesoftware.smackx.packet.DiscoverItems;  
import org.jivesoftware.smackx.packet.OfflineMessageInfo;  
import org.jivesoftware.smackx.packet.OfflineMessageRequest;  
import org.jivesoftware.smackx.provider.AdHocCommandDataProvider;  
import org.jivesoftware.smackx.provider.BytestreamsProvider;  
import org.jivesoftware.smackx.provider.DataFormProvider;  
import org.jivesoftware.smackx.provider.DiscoverInfoProvider;  
import org.jivesoftware.smackx.provider.DiscoverItemsProvider;  
import org.jivesoftware.smackx.provider.IBBProviders;  
import org.jivesoftware.smackx.provider.MUCAdminProvider;  
import org.jivesoftware.smackx.provider.MUCOwnerProvider;  
import org.jivesoftware.smackx.provider.MUCUserProvider;  
import org.jivesoftware.smackx.provider.StreamInitiationProvider;  
import org.jivesoftware.smackx.provider.VCardProvider;  
import org.jivesoftware.smackx.provider.XHTMLExtensionProvider;  
 
public class TestSmack2 {  
  public static void main(String[] args) {XMPPConnection.DEBUG_ENABLED = true;  
    final ConnectionConfiguration connectionConfig = new ConnectionConfiguration("PC2010102716", 5222, ""); 
    connectionConfig.setSASLAuthenticationEnabled(false);  
    ProviderManager pm = ProviderManager.getInstance();  
    configure(pm);  
    try {  
      XMPPConnection connection = new XMPPConnection(connectionConfig);  
      connection.connect();//連接  
      initFeatures(connection);  
      connection.login("test", "test");//登陸  
      //聊天室  
      //MultiUserChat multiUserChat = new MultiUserChat(connection, new InvitationListener() {}); 
       //查找服務  
      System.out.println(connection.getServiceName());  
      List<String> col = getConferenceServices(connection.getServiceName(), connection); 
      for (Object aCol : col) {  
        String service = (String) aCol;  
         //查詢服務器上的聊天室  
        Collection<HostedRoom> rooms = MultiUserChat.getHostedRooms(connection, service); 
        for(HostedRoom room : rooms) {  
          //查看Room消息  
          System.out.println(room.getName() + " - " +room.getJid());  
          RoomInfo roomInfo = MultiUserChat.getRoomInfo(connection, room.getJid()); 
          if(roomInfo != null) {  
            System.out.println(roomInfo.getOccupantsCount() + " : " + roomInfo.getSubject()); 
          }   
         }   
      }  
     
      /*---創建默認配置的聊天室 --- 
      先看看官方的文檔： 
      Creates a new multi user chat with the specified connection and room name. Note: no 
         * information is sent to or received from the server until you attempt to 
         * {@link #join(String) join} the chat room. On some server implementations, 
         * the room will not be created until the first person joins it 
         * 最重要一句:直到用戶調用join方法的時候聊天室才會被創建 
         */  
      MultiUserChat muc = new MultiUserChat(connection, "instant@conference.pc2010102716"); 
       muc.create("user1");  
      muc.sendConfigurationForm(new Form(Form.TYPE_SUBMIT));  
     
      //----創建手動配置聊天室----  
      muc = new MultiUserChat(connection, "reserved4@conference.pc2010102716");  
     
      //銷毀聊天室  
      //muc.destroy("Test", null);  
      muc.create("user2");  
      //獲取聊天室的配置表單  
      Form form = muc.getConfigurationForm();  
      //根據原始表單創建一個要提交的新表單  
      Form submitForm = form.createAnswerForm();  
      //向提交的表單添加默認答復  
      for(Iterator<FormField> fields = form.getFields(); fields.hasNext();) {  
        FormField field = (FormField) fields.next();  
        if(!FormField.TYPE_HIDDEN.equals(field.getType()) && field.getVariable() != null) { 
          submitForm.setDefaultAnswer(field.getVariable());  
        }  
      }  
      //重新設置聊天室名稱  
      submitForm.setAnswer("muc#roomconfig_roomname", "Reserved4 Room");  
      //設置聊天室的新擁有者  
      List<String> owners = new ArrayList<String>();  
      owners.add("test@pc2010102716");  
      submitForm.setAnswer("muc#roomconfig_roomowners", owners);  
      //設置密碼  
      submitForm.setAnswer("muc#roomconfig_passwordprotectedroom", true);  
      submitForm.setAnswer("muc#roomconfig_roomsecret", "reserved");  
      //設置描述  
      submitForm.setAnswer("muc#roomconfig_roomdesc", "新創建的reserved聊天室");  
      //設置聊天室是持久聊天室，即將要被保存下來  
      //submitForm.setAnswer("muc#roomconfig_persistentroom", true);  
      //發送已完成的表單到服務器配置聊天室  
      muc.sendConfigurationForm(submitForm);  
     
      //加入聊天室(使用昵稱喝醉的毛毛蟲 ,使用密碼ddd)  
      muc = new MultiUserChat(connection, "ddd@conference.pc2010102716");  
      muc.join("喝醉的毛毛蟲", "ddd");  
     
      //監聽消息  
      muc.addMessageListener(new PacketListener() {  
        @Override  
        public void processPacket(Packet packet) {  
          Message message = (Message) packet;  
          System.out.println(message.getFrom() + " : " + message.getBody());;  
        }  
      });  
     
      //muc = new MultiUserChat(connection, "ddd@conference.pc2010102716");  
      //muc.join("喝醉的毛毛蟲", "ddd");  
     
      //加入聊天室(使用昵稱喝醉的毛毛蟲 ,使用密碼ddd)並且獲取聊天室裡最後5條信息，  
      //注：addMessageListener監聽器必須在此join方法之前，否則無法監聽到需要的5條消息  
      muc = new MultiUserChat(connection, "ddd@conference.pc2010102716");  
      DiscussionHistory history = new DiscussionHistory();  
      history.setMaxStanzas(5);  
      muc.join("喝醉的毛毛蟲", "ddd", history, SmackConfiguration.getPacketReplyTimeout());  
     
      //監聽拒絕加入聊天室的用戶  
      muc.addInvitationRejectionListener(new InvitationRejectionListener() {  
        @Override  
        public void invitationDeclined(String invitee, String reason) {  
        System.out.println(invitee + " reject invitation, reason is " + reason);  
        }  
      });  
      //邀請用戶加入聊天室  
      muc.invite("test3@pc2010102716", "大家來談談人生");  
      //監聽邀請加入聊天室請求  
      MultiUserChat.addInvitationListener(connection, new InvitationListener() {  
        @Override  
        public void invitationReceived(XMPPConnection conn, String room, String inviter, String reason, String password, Message message) {  
        //例：直接拒絕邀請  
        MultiUserChat.decline(conn, room, inviter, "你丫很閒啊！");  
        }  
      });  
     
     
      //根據roomJID獲取聊天室信息  
      RoomInfo roomInfo = MultiUserChat.getRoomInfo(connection, "ddd@conference.pc2010102716"); 
       System.out.println(roomInfo.getRoom() + "-" + roomInfo.getSubject() + "-" + roomInfo.getOccupantsCount()); 
        
      //判斷用戶是否支持Multi-User聊天協議  
      //注：需要加上資源標識符  
      boolean supports = MultiUserChat.isServiceEnabled(connection, "test3@pc2010102716/spark"); 
       //獲取某用戶所加入的聊天室  
      if(supports) {  
        Iterator<String> joinedRooms = MultiUserChat.getJoinedRooms(connection, "test3@pc2010102716/spark"); 
        while(joinedRooms.hasNext()) {  
          System.out.println("test3 has joined Room " + joinedRooms.next());  
        }  
      }  
     
      //與聊天室用戶私聊  
      Chat chat = muc.createPrivateChat("ddd@conference.pc2010102716/飛鳥", new MessageListener() { 
         @Override  
         public void processMessage(Chat chat, Message message) {  
           System.out.println("Private Chat: Received message from " + message.getFrom() + "-" + message.getBody()); 
         }  
      });  
      chat.sendMessage("今天不用加班吧？");  
     
      //改變聊天室主題  
      muc.addSubjectUpdatedListener(new SubjectUpdatedListener() {  
        @Override  
        public void subjectUpdated(String subject, String from) {  
          System.out.println("Subject updated to " + subject +" by " + from);  
        }  
      });  
      //muc.changeSubject("New Subject11");  
     
      /*一個成員可能有四種角色: 
      1：主持者(Moderator) （權限最大的角色，管理其他成員在聊天室中的角色 
      2：參與者(Participant 
      3：游客 (Visitor) (不能向所有成員發送消息) 
      4：無（沒有角色）（NONE） 
      */  
     
      /*聊天室用戶可以有5種從屬關系 
       * 1、所有者 Owner 
       * 2、管理員 Admin 
       * 3、成員 Member 
       * 4、被驅逐者 Outcast 
       * 5、無（不存在從屬關系) None 
       */  
     
      //配置聊天室為Moderated聊天室  
      form = muc.getConfigurationForm();  
      Form answerForm = form.createAnswerForm();  
      answerForm.setAnswer("muc#roomconfig_moderatedroom", "1");  
      muc.sendConfigurationForm(answerForm);  
     
      //監聽自己的狀態變更和事件  
      muc.addUserStatusListener(new DefaultUserStatusListener() {  
        @Override  
        public void voiceRevoked() {  
          super.voiceRevoked();  
          System.out.println("你被禁言了!");  
        }  
       
        @Override  
        public void voiceGranted() {  
          super.voiceGranted();  
          System.out.println("你被批准發言了!");  
        }  
       
        @Override  
        public void membershipGranted() {  
          super.membershipGranted();  
          System.out.println("你被賦予了Member權限");  
        }  
       
        @Override  
        public void membershipRevoked() {  
          super.membershipRevoked();  
          System.out.println("你被解除了Member權限");  
        }  
       
        @Override  
        public void adminGranted() {  
          super.adminGranted();  
          System.out.println("你被賦予了管理員權限");  
        }  
       
        @Override  
        public void adminRevoked() {  
        super.adminRevoked();  
        System.out.println("你被解除了管理員權限");  
        }  
      //......  
      });  
      //房主(Owner)批准test3發言權  
      muc.grantVoice("test3@pc2010102716");  
     
      //監聽他人狀態變更  
      muc.addParticipantStatusListener(new DefaultParticipantStatusListener() {  
     
        @Override  
        public void voiceGranted(String participant) {  
          super.voiceGranted(participant);  
        System.out.println(participant + "被批准發言了!");  
        }  
       
        @Override  
        public void voiceRevoked(String participant) {  
          super.voiceRevoked(participant);  
          System.out.println(participant + "被禁言了!");  
        }  
       
        @Override  
        public void membershipRevoked(String participant) {  
          super.membershipRevoked(participant);  
        }  
       
        @Override  
        public void adminGranted(String participant) {  
          super.adminGranted(participant);  
        }  
       
        @Override  
        public void adminRevoked(String participant) {  
          super.adminRevoked(participant);  
        }  
     
      });  
     
      //房主(Owner)批准test3管理員特權  
      muc.grantAdmin("test3@pc2010102716");  
   
   
      //發送消息  
      BufferedReader cmdIn = new BufferedReader(new InputStreamReader(System.in));  
      while(true) {  
        try {  
           String cmd = cmdIn.readLine();  
           if("!q".equalsIgnoreCase(cmd)) {  
             break;  
           }  
         }catch(Exception ex) {  
         }  
      }  
      connection.disconnect();  
      System.exit(0);     
    } catch (Exception e) {  
      e.printStackTrace();  
    }  
  }  
 
  public static List<String> getConferenceServices(String server, XMPPConnection connection) throws Exception { 
   List<String> answer = new ArrayList<String>();  
      ServiceDiscoveryManager discoManager = ServiceDiscoveryManager.getInstanceFor(connection); 
       DiscoverItems items = discoManager.discoverItems(server);  
      for (Iterator<DiscoverItems.Item> it = items.getItems(); it.hasNext();) { 
         DiscoverItems.Item item = (DiscoverItems.Item)it.next();  
        if (item.getEntityID().startsWith("conference") || item.getEntityID().startsWith("private")) { 
           answer.add(item.getEntityID());  
        }  
        else {  
          try {  
            DiscoverInfo info = discoManager.discoverInfo(item.getEntityID()); 
             if (info.containsFeature("http://jabber.org/protocol/muc")) { 
               answer.add(item.getEntityID());  
            }  
          }  
          catch (XMPPException e) {  
          }  
        }  
      }  
      return answer;  
    }  
 
 
  private static void configure(ProviderManager pm) {  
    // Service Discovery # Items  
    pm.addIQProvider("query", "http://jabber.org/protocol/disco#items", new DiscoverItemsProvider()); 
     // Service Discovery # Info  
    pm.addIQProvider("query", "http://jabber.org/protocol/disco#info", new DiscoverInfoProvider()); 
      
    // Service Discovery # Items  
    pm.addIQProvider("query", "http://jabber.org/protocol/disco#items", new DiscoverItemsProvider()); 
     // Service Discovery # Info  
    pm.addIQProvider("query", "http://jabber.org/protocol/disco#info", new DiscoverInfoProvider()); 
      
    //Offline Message Requests  
    pm.addIQProvider("offline","http://jabber.org/protocol/offline", new OfflineMessageRequest.Provider()); 
        //Offline Message Indicator  
        pm.addExtensionProvider("offline","http://jabber.org/protocol/offline", new OfflineMessageInfo.Provider());     
          
    //vCard  
    pm.addIQProvider("vCard","vcard-temp", new VCardProvider());  
 
    //FileTransfer  
    pm.addIQProvider("si","http://jabber.org/protocol/si", new StreamInitiationProvider()); 
        pm.addIQProvider("query","http://jabber.org/protocol/bytestreams", new BytestreamsProvider()); 
        pm.addIQProvider("open","http://jabber.org/protocol/ibb", new IBBProviders.Open()); 
        pm.addIQProvider("close","http://jabber.org/protocol/ibb", new IBBProviders.Close()); 
        pm.addExtensionProvider("data","http://jabber.org/protocol/ibb", new IBBProviders.Data());     
        //Data Forms  
      pm.addExtensionProvider("x", "jabber:x:data", new DataFormProvider());  
      //Html  
      pm.addExtensionProvider("html", "http://jabber.org/protocol/xhtml-im", new XHTMLExtensionProvider()); 
      //Ad-Hoc Command  
      pm.addIQProvider("command", "http://jabber.org/protocol/commands", new AdHocCommandDataProvider());     
    // Chat State  
    ChatStateExtension.Provider chatState = new ChatStateExtension.Provider();  
    pm.addExtensionProvider("active", "http://jabber.org/protocol/chatstates", chatState); 
    pm.addExtensionProvider("composing", "http://jabber.org/protocol/chatstates",  
      chatState);  
    pm.addExtensionProvider("paused", "http://jabber.org/protocol/chatstates", chatState); 
    pm.addExtensionProvider("inactive", "http://jabber.org/protocol/chatstates", chatState); 
    pm.addExtensionProvider("gone", "http://jabber.org/protocol/chatstates", chatState); 
    //MUC User,Admin,Owner  
    pm.addExtensionProvider("x", "http://jabber.org/protocol/muc#user", new MUCUserProvider()); 
    pm.addIQProvider("query", "http://jabber.org/protocol/muc#admin", new MUCAdminProvider()); 
    pm.addIQProvider("query", "http://jabber.org/protocol/muc#owner", new MUCOwnerProvider()); 
  }  
 
  private static void initFeatures(XMPPConnection xmppConnection) {  
    ServiceDiscoveryManager.setIdentityName("Android_IM");  
    ServiceDiscoveryManager.setIdentityType("phone");  
    ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(xmppConnection); 
     if(sdm == null) {  
    sdm = new ServiceDiscoveryManager(xmppConnection);  
    }  
    sdm.addFeature("http://jabber.org/protocol/disco#info");  
    sdm.addFeature("http://jabber.org/protocol/caps");  
    sdm.addFeature("urn:xmpp:avatar:metadata");  
    sdm.addFeature("urn:xmpp:avatar:metadata+notify");  
    sdm.addFeature("urn:xmpp:avatar:data");  
    sdm.addFeature("http://jabber.org/protocol/nick");  
    sdm.addFeature("http://jabber.org/protocol/nick+notify");  
    sdm.addFeature("http://jabber.org/protocol/xhtml-im");  
    sdm.addFeature("http://jabber.org/protocol/muc");  
    sdm.addFeature("http://jabber.org/protocol/commands");  
    sdm.addFeature("http://jabber.org/protocol/si/profile/file-transfer");  
    sdm.addFeature("http://jabber.org/protocol/si");  
    sdm.addFeature("http://jabber.org/protocol/bytestreams");  
    sdm.addFeature("http://jabber.org/protocol/ibb");  
    sdm.addFeature("http://jabber.org/protocol/feature-neg");  
    sdm.addFeature("jabber:iq:privacy");  
  }  
 
}

上面有兩張Spark客戶端的聊天室列表占有者一列不同的原因：當使用以下代碼獲取時不能獲取occupantsCount和subject的值：

System.out.println(roomInfo.getOccupantsCount() + " : " + roomInfo.getSubject());

這是由於Openfire端有個bug（暫且這樣說吧，我不知為什麼Openfire這樣做）.首先修改Smack的一個bug,修改RoomInfo類的RoomInfo(DiscoverInfo info) 方法:

Iterator<String> values = form.getField("muc#roominfo_subject").getValues(); 
if (values.hasNext()) { 
  this.subject = values.next(); 
} 
else { 
  this.subject = ""; 
}

改為：

final FormField subjField = form.getField("muc#roominfo_subject");  
this.subject = subjField == null ? "" : subjField.getValues().next();

修改Openfire的源碼，org/jivesoftware/openfire/muc/spi/MultiUserChatServiceImpl類的public DataForm getExtendedInfo(String name, String node, JID senderJID) 方法：

      /*final FormField fieldOcc = dataForm.addField(); */ 
      fieldSubj.setVariable("muc#roominfo_occupants"); 
      fieldSubj.setLabel(LocaleUtils.getLocalizedString("muc.extended.info.occupants")); 
      fieldSubj.addValue(Integer.toString(room.getOccupantsCount()));

改為：

final FormField fieldOccu= dataForm.addField()；
fieldOccu.setVariable("muc#roominfo_occupants");
fieldOccu.setLabel(LocaleUtils.getLocalizedString("muc.extended.info.occupants"));
fieldOccu.addValue(Integer.toString(room.getOccupantsCount()));

2016224155734617.gif (496×393)