無法在JAVA中使用SMACK api顯示收到的消息

Question

我在本地主機上使用SMACK api和OpenFire做了一個簡單的客戶端。到目前爲止，我有兩個用戶說X和Y.每當有人登錄到客戶端，就會有一個發送按鈕向用戶Y發送消息。我已經檢查了XMPP調試管理器，並且能夠發送/在那裏接收消息。但是，我無法在我已分配用於顯示消息的JLabel中顯示這些消息。如果用戶Y點擊發送按鈕，按照功能它發送一條消息給自己，並在JLabel上發送。但是，當用戶X點擊發送按鈕時，會收到消息，但不會在Y的JLabel上顯示/更新。

有趣的是，一切工作，因爲它應該與GTalk配置。

的結構如下：

WelcomeUser.java： 是歡迎的形式與用戶名和密碼的提示。點擊登錄按鈕： 它將ChatBoard類設置爲可見，並將用戶名密碼傳遞給ChatBoard的構造函數。 代碼：

chBoard=new ChatBoard(username.getText(),password.getText()); 
       chBoard.setVisible(true); 
       setVisible(false); 

這裏是ChatBoard.java代碼：

import java.awt.EventQueue; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.util.Collection; 

import javax.swing.GroupLayout; 
import javax.swing.GroupLayout.Alignment; 
import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 
import javax.swing.JTextField; 
import javax.swing.LayoutStyle.ComponentPlacement; 
import javax.swing.border.EmptyBorder; 

import org.jivesoftware.smack.Chat; 
import org.jivesoftware.smack.ConnectionConfiguration; 
import org.jivesoftware.smack.MessageListener; 
import org.jivesoftware.smack.Roster; 
import org.jivesoftware.smack.RosterEntry; 
import org.jivesoftware.smack.XMPPConnection; 
import org.jivesoftware.smack.XMPPException; 
import org.jivesoftware.smack.packet.Message; 

public class ChatBoard extends JFrame implements MessageListener { 

    private static final long serialVersionUID = 1L; 
    private JPanel contentPane; 
    static String username, password; 
    static XMPPConnection connection; 
    private JTextField textField; 
    static JLabel board = new JLabel(""); 
    static Chat chat; 

    public void sendChat() { 
     try { 
      chat = connection.getChatManager().createChat(
        "userY@my-pc/Smack", this); 
      chat.sendMessage("Hello, This is " + username); 
     } catch (XMPPException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

    } 


    /** 
    * Create the frame. 
    */ 
    public ChatBoard(String user, String pass) { 

     username = user; 
     password = pass; 

     //// 
        ///JFrame creation code ommited for this thread. 
     // //////////////////////////////////////////// 

     XMPPConnection.DEBUG_ENABLED = true; 

     ConnectionConfiguration config = new ConnectionConfiguration(
       "127.0.0.1"); 


     connection = new XMPPConnection(config); 

     try { 
      connection.connect(); 
      System.out.println("Connected..."); 
     } catch (XMPPException e) { 

      e.printStackTrace(); 
      System.out.println("Not Connected. Error :" + e.getMessage()); 
     } 

     try { 
      connection.login(username, password); 
      System.out.println("Logged in..."); 
     } catch (XMPPException e) { 

      e.printStackTrace(); 
      System.out.println("Not Logged in. Error :" + e.getMessage()); 
     } 

     Roster roster = connection.getRoster(); 
     Collection<RosterEntry> entries = roster.getEntries(); 

     System.out.println("\n\n" + entries.size() + " buddy(ies):"); 
     for (RosterEntry r : entries) { 
      System.out.println(r.getUser()); 
     } 

     // ///////////////////////////////// 

    } 

    @Override 
    public void processMessage(Chat arg0, Message arg1) { 
     // TODO Auto-generated method stub 

     board.setText(board.getText() + arg1.getBody()); 
     System.out.println(arg1.getFrom() + ":" + arg1.getBody().toString()); 

    } 

} 

我是新來的這一點，所以原諒我，如果有任何愚蠢的錯誤。你的幫助將非常感激。

雜項。詳細信息：本地主機上的OpenFire 3.7.1與SMACK 3.2.2

Answer 1

看看http://www.igniterealtime.org/builds/smack/docs/latest/documentation/messaging.html的底部。對於來自其他用戶的聊天聊天，您必須重寫ChatManagerListener

您可以在processMessage上設置斷點嗎？它是否會觸發該斷點？如果是的話它可能只是確保的事：

board.setText() 

發生在Swing event dispatch thread

所以儘量讓你而processMessage這樣的：

@Override 
public void processMessage(Chat arg0, Message arg1) { 
    // TODO Auto-generated method stub 

    try 
    { 
     SwingUtilities.invokeAndWait(new Runnable() 
     { 

      @Override 
      public void run() 
      { 
       board.setText(board.getText() + arg1.getBody()); 
      } 
     }); 
    } 
    catch (InvocationTargetException e) 
    { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    catch (InterruptedException e) 
    { 
     // TODO Auto-generated catch block 
     e.printStackTrace(); 
    } 
    System.out.println(arg1.getFrom() + ":" + arg1.getBody().toString()); 

} 

Answer 2

我chatBoard添加了這個代碼只是在我的代碼中提到的構造函數的末尾，它現在似乎工作:-)謝謝alex.p！

connection.getChatManager().addChatListener(new ChatManagerListener() { 



       public void chatCreated(final Chat chat, final boolean createdLocally) { 

        chat.addMessageListener(new MessageListener() { 



         public void processMessage(Chat chat, Message message) { 

          //JOptionPane.showMessageDialog(null, "Rec: For " + chat.getParticipant() + " from " + message.getFrom() + "\n" + message.getBody()); 

          String sender=message.getFrom(); 

          String senderNames=sender; 

          System.out.println("Received message: " + (message != null ? message.getBody() : "NULL")); 

          board.setText(board.getText()+"\n "+ message.getFrom()+" : "+ message.getBody()); 
          //PrivateChatManager.receiveMessage(sender, senderNames, message.getBody()); 



         } 

        }); 

       } 
     });