java Smack消息传递客户端，而不是聊天文本

3 月，1 周 Questions & Answers 799

client1可以使用向client2发送txt消息

connection.getChatManager().createChat(to, this).sendMessage(message);

如何发送其他类型的消息：如信息消息？（客户1到客户2）

由于我需要，聊天窗口中不应显示信息消息。。。。可能吗？使用smack，smackx库

非常感谢

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共 (3) 个答案

# 1 楼答案

一个更复杂的消息扩展示例：

Message videoMsg = new Message();
VideoChatRTP videoXml = new VideoChatRTP();
videoXml.setVideoType(VideoMediaType.REQUEST);
videoXml.setAddress(address);
videoMsg.setTo(receive);
videoMsg.addExtension(videoXml);
XMPPConnection conn = BaseService.getInstance().getConnection();
conn.sendPacket(videoMsg);

扩展类VideoChatRIP必须实现PacketExtension：

public class VideoChatRTP implements PacketExtension {
    private VideoMediaType videoType;
    private String address;
    public String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public VideoMediaType getVideoType() {
        return videoType;
    }
    public void setVideoType(VideoMediaType videoType) {
        this.videoType = videoType;
    }
    public static final String NAME = "jingle";
    public static final String NAME_SPACE = "com:roger:video";
    public VideoChatRTP() {
        super();
    }
    @Override
    public String getElementName() {
        return NAME;
    }
    @Override
    public String getNamespace() {
        return NAME_SPACE;
    }
    @Override
    public String toXML() {
        StringBuffer sb = new StringBuffer();
        sb.append("<jingle").append(" xmlns=\"").append(NAME_SPACE).append(
                "\">");
        sb.append("<type>").append(videoType).append("</type>");
        sb.append("<ipAddress>").append(address).append("</ipAddress>");
        sb.append("</jingle>");
        return sb.toString();
    }
}

听众：

ProviderManager.getInstance().addExtensionProvider(VideoChatRTP.NAME, VideoChatRTP.NAME_SPACE, new VideoChatReceive());

处理：

public class VideoChatReceive implements PacketExtensionProvider {
    @Override
    public PacketExtension parseExtension(XmlPullParser parser)
            throws Exception {
        boolean done = false;
        String requestType = "asdasd";
        String ipAddress = "asdasd";
        while (!done) {
            int eventType = parser.next();
            String name = parser.getName();
            if (eventType == XmlPullParser.START_TAG) {
                if (name.equals("type")) {
                    requestType = parser.nextText();
                }
                if (name.equals("ipAddress")) {
                    ipAddress = parser.nextText();
                }
            }
            if (eventType == XmlPullParser.END_TAG) {
                if (name.equals("jingle")) {
                    done = true;
                }
            }
        }
        VideoChatRTP videoRtp = new VideoChatRTP();
        videoRtp.setVideoType(VideoMediaType.valueOf(requestType));

        videoRtp.setAddress(ipAddress);
        return videoRtp;
    }
}

# 2 楼答案

下面是消息扩展的示例。 XMPP协议的基本XML结构是：

<message  
    from='sender_jid'  
    to='receiver_jid'  
    type='message_type'>  
  <body> content </body>  
</message>

发送消息的过程：

//build chat  
Chat chat = chatManager.createChat("jid");  

//build extension  
UserInfo4XMPP userInfo4XMPP = new UserInfo4XMPP();  
userInfo4XMPP.setNameText("userx");  
userInfo4XMPP.setUrlText("http://www.liaoku.org/");  

//build message  
Message message = new Message();  
message.setBody("hello");  
message.addExtension(userInfo4XMPP);// add the extension  

//send  
chat.sendMessage(message);

UserInfo4XMPP的定义如下：

import org.jivesoftware.smack.packet.ExtensionElement;  

public class UserInfo4XMPP implements ExtensionElement{  

    private String elementName = "userinfo";   
    private String nameElement = "name";  
    private String urlElement = "url";  
    private String nameText = "";  
    private String urlText = "";  

    @Override  
    public String getElementName() {  
        return elementName;  
    }  

    @Override  
    public CharSequence toXML() {  
        StringBuilder sb = new StringBuilder();  

        sb.append("<");  
        sb.append(elementName);  
        sb.append(">");  

            sb.append("<");  
            sb.append(nameElement);  
            sb.append(">");  
            sb.append(nameText);  
            sb.append("</");  
            sb.append(nameElement);  
            sb.append(">");  

            sb.append("<");  
            sb.append(urlElement);  
            sb.append(">");  
            sb.append(urlText);  
            sb.append("</");  
            sb.append(urlElement);  
            sb.append(">");  

        sb.append("</");  
        sb.append(elementName);  
        sb.append(">");  

        return sb.toString();  
    }  

    @Override  
    public String getNamespace() {  
        return "";  
    }  

    public String getNameText() {  
        return nameText;  
    }  

    public void setNameText(String nameText) {  
        this.nameText = nameText;  
    }  

    public String getUrlText() {  
        return urlText;  
    }  

    public void setUrlText(String urlText) {  
        this.urlText = urlText;  
    }  
}

# 3 楼答案
你想在这里做的是给你的短信添加一个扩展名。这是一个粗略的指南
```
Chat chat = connection.getChatManager().createChat(to, this);
Message message = new Message(to, Message.Type.chat);
message.setBody("hello");
message.setProperty(prop0, val0);
message.setProperty(prop1, val1);
chat.sendMessage(message)
```
这些属性位于单独的名称空间中（使用toXML()查看），不会出现在聊天窗口中。在“另一边”，应用程序使用getProperty()来检索值

如果不需要键/值对，而是结构化数据，请在消息正文中使用addExtension()。这有点复杂，因为您基本上必须扩展PacketExtension，提供自己的名称空间。你甚至可能需要写一个PacketExtensionProvider

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java Smack消息传递客户端，而不是聊天文本

共 (3) 个答案

# 1 楼答案

# 2 楼答案

# 3 楼答案