使用asmack for android在XMPP数据包中添加自定义属性?[英] Adding Custom Attributes in Message tag in XMPP packet using asmack for android?

本文是小编为大家收集整理的关于使用asmack for android在XMPP数据包中添加自定义属性?的处理/解决方法,可以参考本文帮助大家快速定位并解决问题,中文翻译不准确的可切换到English标签页查看源文。

问题描述

我要收到的消息数据包.

  <message to="39@domainname.com/smack" chat_id="73392" 
           custom_packet="true" user_id="44" manager_id="39" time_stamp="0" website_id="0" 
           visitor_name="John" end_time="False" xml:lang="en-us" type="groupchat" 
           from="room73392@conference.domainname.com/39">
           <body>Hello</body> 
           <x xmlns="http://jabber.org/protocol/muc#user"> 
           <status xmlns="" code="0"/>   
           </x></message>

我正在收到的消息包.

<message to="44@domainname.com/Smack" 
    from="room73407@conference.domainname.com/Visitor1171" type="groupchat">
    <body>Hello</body>
    <delay xmlns="urn:xmpp:delay"></delay>
    <x xmlns="jabber:x:delay" stamp="20120917T05:57:19" 
    from="4732abb5@domainname.com/4732abb5">
    </x></message>

我有一个smack的源代码,这是数据包类.谁能帮我做我的自定义数据包.感谢修改源代码的任何帮助.

代码:

public abstract class Packet {

protected static final String DEFAULT_LANGUAGE =
        java.util.Locale.getDefault().getLanguage().toLowerCase();

private static String DEFAULT_XML_NS = null;

/**
 * Constant used as packetID to indicate that a packet has no id. To indicate that a packet
 * has no id set this constant as the packet's id. When the packet is asked for its id the
 * answer will be <tt>null</tt>.
 */
public static final String ID_NOT_AVAILABLE = "ID_NOT_AVAILABLE";

/**
 * Date format as defined in XEP-0082 - XMPP Date and Time Profiles.
 * The time zone is set to UTC.
 * <p>
 * Date formats are not synchronized. Since multiple threads access the format concurrently,
 * it must be synchronized externally. 
 */
public static final DateFormat XEP_0082_UTC_FORMAT = new SimpleDateFormat(
                "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
static {
    XEP_0082_UTC_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
}


/**
 * A prefix helps to make sure that ID's are unique across mutliple instances.
 */
private static String prefix = StringUtils.randomString(5) + "-";

/**
 * Keeps track of the current increment, which is appended to the prefix to
 * forum a unique ID.
 */
private static long id = 0;

private String xmlns = DEFAULT_XML_NS;

/**
 * Returns the next unique id. Each id made up of a short alphanumeric
 * prefix along with a unique numeric value.
 *
 * @return the next id.
 */
public static synchronized String nextID() {
    return prefix + Long.toString(id++);
}

public static void setDefaultXmlns(String defaultXmlns) {
    DEFAULT_XML_NS = defaultXmlns;
}

private String packetID = null;
private String to = null;
private String from = null;
private final List<PacketExtension> packetExtensions
        = new CopyOnWriteArrayList<PacketExtension>();

private final Map<String,Object> properties = new HashMap<String, Object>();
private XMPPError error = null;

/**
 * Returns the unique ID of the packet. The returned value could be <tt>null</tt> when
 * ID_NOT_AVAILABLE was set as the packet's id.
 *
 * @return the packet's unique ID or <tt>null</tt> if the packet's id is not available.
 */
public String getPacketID() {
    if (ID_NOT_AVAILABLE.equals(packetID)) {
        return null;
    }

    if (packetID == null) {
        packetID = nextID();
    }
    return packetID;
}

/**
 * Sets the unique ID of the packet. To indicate that a packet has no id
 * pass the constant ID_NOT_AVAILABLE as the packet's id value.
 *
 * @param packetID the unique ID for the packet.
 */
public void setPacketID(String packetID) {
    this.packetID = packetID;
}

/**
 * Returns who the packet is being sent "to", or <tt>null</tt> if
 * the value is not set. The XMPP protocol often makes the "to"
 * attribute optional, so it does not always need to be set.<p>
 *
 * The StringUtils class provides several useful methods for dealing with
 * XMPP addresses such as parsing the
 * {@link StringUtils#parseBareAddress(String) bare address},
 * {@link StringUtils#parseName(String) user name},
 * {@link StringUtils#parseServer(String) server}, and
 * {@link StringUtils#parseResource(String) resource}.  
 *
 * @return who the packet is being sent to, or <tt>null</tt> if the
 *      value has not been set.
 */
public String getTo() {
    return to;
}

/**
 * Sets who the packet is being sent "to". The XMPP protocol often makes
 * the "to" attribute optional, so it does not always need to be set.
 *
 * @param to who the packet is being sent to.
 */
public void setTo(String to) {
    this.to = to;
}

/**
 * Returns who the packet is being sent "from" or <tt>null</tt> if
 * the value is not set. The XMPP protocol often makes the "from"
 * attribute optional, so it does not always need to be set.<p>
 *
 * The StringUtils class provides several useful methods for dealing with
 * XMPP addresses such as parsing the
 * {@link StringUtils#parseBareAddress(String) bare address},
 * {@link StringUtils#parseName(String) user name},
 * {@link StringUtils#parseServer(String) server}, and
 * {@link StringUtils#parseResource(String) resource}.  
 *
 * @return who the packet is being sent from, or <tt>null</tt> if the
 *      value has not been set.
 */
public String getFrom() {
    return from;
}

/**
 * Sets who the packet is being sent "from". The XMPP protocol often
 * makes the "from" attribute optional, so it does not always need to
 * be set.
 *
 * @param from who the packet is being sent to.
 */
public void setFrom(String from) {
    this.from = from;
}

/**
 * Returns the error associated with this packet, or <tt>null</tt> if there are
 * no errors.
 *
 * @return the error sub-packet or <tt>null</tt> if there isn't an error.
 */
public XMPPError getError() {
    return error;
}

/**
 * Sets the error for this packet.
 *
 * @param error the error to associate with this packet.
 */
public void setError(XMPPError error) {
    this.error = error;
}

/**
 * Returns an unmodifiable collection of the packet extensions attached to the packet.
 *
 * @return the packet extensions.
 */
public synchronized Collection<PacketExtension> getExtensions() {
    if (packetExtensions == null) {
        return Collections.emptyList();
    }
    return Collections.unmodifiableList(new ArrayList<PacketExtension>(packetExtensions));
}

/**
 * Returns the first extension of this packet that has the given namespace.
 *
 * @param namespace the namespace of the extension that is desired.
 * @return the packet extension with the given namespace.
 */
public PacketExtension getExtension(String namespace) {
    return getExtension(null, namespace);
}

/**
 * Returns the first packet extension that matches the specified element name and
 * namespace, or <tt>null</tt> if it doesn't exist. If the provided elementName is null
 * than only the provided namespace is attempted to be matched. Packet extensions are
 * are arbitrary XML sub-documents in standard XMPP packets. By default, a 
 * DefaultPacketExtension instance will be returned for each extension. However, 
 * PacketExtensionProvider instances can be registered with the 
 * {@link org.jivesoftware.smack.provider.ProviderManager ProviderManager}
 * class to handle custom parsing. In that case, the type of the Object
 * will be determined by the provider.
 *
 * @param elementName the XML element name of the packet extension. (May be null)
 * @param namespace the XML element namespace of the packet extension.
 * @return the extension, or <tt>null</tt> if it doesn't exist.
 */
public PacketExtension getExtension(String elementName, String namespace) {
    if (namespace == null) {
        return null;
    }
    for (PacketExtension ext : packetExtensions) {
        if ((elementName == null || elementName.equals(ext.getElementName()))
                && namespace.equals(ext.getNamespace()))
        {
            return ext;
        }
    }
    return null;
}

/**
 * Adds a packet extension to the packet.
 *
 * @param extension a packet extension.
 */
public void addExtension(PacketExtension extension) {
    packetExtensions.add(extension);
}

/**
 * Removes a packet extension from the packet.
 *
 * @param extension the packet extension to remove.
 */
public void removeExtension(PacketExtension extension)  {
    packetExtensions.remove(extension);
}

/**
 * Returns the packet property with the specified name or <tt>null</tt> if the
 * property doesn't exist. Property values that were orginally primitives will
 * be returned as their object equivalent. For example, an int property will be
 * returned as an Integer, a double as a Double, etc.
 *
 * @param name the name of the property.
 * @return the property, or <tt>null</tt> if the property doesn't exist.
 */
public synchronized Object getProperty(String name) {
    if (properties == null) {
        return null;
    }
    return properties.get(name);
}

/**
 * Sets a property with an Object as the value. The value must be Serializable
 * or an IllegalArgumentException will be thrown.
 *
 * @param name the name of the property.
 * @param value the value of the property.
 */
public synchronized void setProperty(String name, Object value) {
    if (!(value instanceof Serializable)) {
        throw new IllegalArgumentException("Value must be serialiazble");
    }
    properties.put(name, value);
}

/**
 * Deletes a property.
 *
 * @param name the name of the property to delete.
 */
public synchronized void deleteProperty(String name) {
    if (properties == null) {
        return;
    }
    properties.remove(name);
}

/**
 * Returns an unmodifiable collection of all the property names that are set.
 *
 * @return all property names.
 */
public synchronized Collection<String> getPropertyNames() {
    if (properties == null) {
        return Collections.emptySet();
    }
    return Collections.unmodifiableSet(new HashSet<String>(properties.keySet()));
}

/**
 * Returns the packet as XML. Every concrete extension of Packet must implement
 * this method. In addition to writing out packet-specific data, every sub-class
 * should also write out the error and the extensions data if they are defined.
 *
 * @return the XML format of the packet as a String.
 */
public abstract String toXML();

/**
 * Returns the extension sub-packets (including properties data) as an XML
 * String, or the Empty String if there are no packet extensions.
 *
 * @return the extension sub-packets as XML or the Empty String if there
 * are no packet extensions.
 */
protected synchronized String getExtensionsXML() {
    StringBuilder buf = new StringBuilder();
    // Add in all standard extension sub-packets.
    for (PacketExtension extension : getExtensions()) {
        buf.append(extension.toXML());
    }
    // Add in packet properties.
    if (properties != null && !properties.isEmpty()) {
        buf.append("<properties xmlns=\"http://www.jivesoftware.com/xmlns/xmpp/properties\">");
        // Loop through all properties and write them out.
        for (String name : getPropertyNames()) {
            Object value = getProperty(name);
            buf.append("<property>");
            buf.append("<name>").append(StringUtils.escapeForXML(name)).append("</name>");
            buf.append("<value type=\"");
            if (value instanceof Integer) {
                buf.append("integer\">").append(value).append("</value>");
            }
            else if (value instanceof Long) {
                buf.append("long\">").append(value).append("</value>");
            }
            else if (value instanceof Float) {
                buf.append("float\">").append(value).append("</value>");
            }
            else if (value instanceof Double) {
                buf.append("double\">").append(value).append("</value>");
            }
            else if (value instanceof Boolean) {
                buf.append("boolean\">").append(value).append("</value>");
            }
            else if (value instanceof String) {
                buf.append("string\">");
                buf.append(StringUtils.escapeForXML((String)value));
                buf.append("</value>");
            }
            // Otherwise, it's a generic Serializable object. Serialized objects are in
            // a binary format, which won't work well inside of XML. Therefore, we base-64
            // encode the binary data before adding it.
            else {
                ByteArrayOutputStream byteStream = null;
                ObjectOutputStream out = null;
                try {
                    byteStream = new ByteArrayOutputStream();
                    out = new ObjectOutputStream(byteStream);
                    out.writeObject(value);
                    buf.append("java-object\">");
                    String encodedVal = StringUtils.encodeBase64(byteStream.toByteArray());
                    buf.append(encodedVal).append("</value>");
                }
                catch (Exception e) {
                    e.printStackTrace();
                }
                finally {
                    if (out != null) {
                        try {
                            out.close();
                        }
                        catch (Exception e) {
                            // Ignore.
                        }
                    }
                    if (byteStream != null) {
                        try {
                            byteStream.close();
                        }
                        catch (Exception e) {
                            // Ignore.
                        }
                    }
                }
            }
            buf.append("</property>");
        }
        buf.append("</properties>");
    }
    return buf.toString();
}

public String getXmlns() {
    return this.xmlns;
}

public static String getDefaultLanguage() {
    return DEFAULT_LANGUAGE;
}


@Override
public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    Packet packet = (Packet) o;

    if (error != null ? !error.equals(packet.error) : packet.error != null) { return false; }
    if (from != null ? !from.equals(packet.from) : packet.from != null) { return false; }
    if (!packetExtensions.equals(packet.packetExtensions)) { return false; }
    if (packetID != null ? !packetID.equals(packet.packetID) : packet.packetID != null) {
        return false;
    }
    if (properties != null ? !properties.equals(packet.properties)
            : packet.properties != null) {
        return false;
    }
    if (to != null ? !to.equals(packet.to) : packet.to != null)  { return false; }
    return !(xmlns != null ? !xmlns.equals(packet.xmlns) : packet.xmlns != null);
}

@Override
public int hashCode() {
    int result;
    result = (xmlns != null ? xmlns.hashCode() : 0);
    result = 31 * result + (packetID != null ? packetID.hashCode() : 0);
    result = 31 * result + (to != null ? to.hashCode() : 0);
    result = 31 * result + (from != null ? from.hashCode() : 0);
    result = 31 * result + packetExtensions.hashCode();
    result = 31 * result + properties.hashCode();
    result = 31 * result + (error != null ? error.hashCode() : 0);
    return result;
}
}

推荐答案

我在数据包类中添加了新字段,并在那里写了Getter和setter.

private String chat_id = null;
private String custom_packet = null;
private String user_id=null;
private String manager_id=null;
private String time_stamp=null;
private String website_id=null;
private String visitor_name=null;
private String end_time=null;




public String getChat_id() {
    return chat_id;
}

public void setChat_id(String chat_id) {
    this.chat_id = chat_id;
}

public String getCustom_packet() {
    return custom_packet;
}

public void setCustom_packet(String custom_packet) {
    this.custom_packet = custom_packet;
}

public String getUser_id() {
    return user_id;
}

public void setUser_id(String user_id) {
    this.user_id = user_id;
}

public String getManager_id() {
    return manager_id;
}

public void setManager_id(String manager_id) {
    this.manager_id = manager_id;
}

public String getTime_stamp() {
    return time_stamp;
}

public void setTime_stamp(String time_stamp) {
    this.time_stamp = time_stamp;
}

public String getWebsite_id() {
    return website_id;
}

public void setWebsite_id(String website_id) {
    this.website_id = website_id;
}

public String getVisitor_name() {
    return visitor_name;
}

public void setVisitor_name(String visitor_name) {
    this.visitor_name = visitor_name;
}

public String getEnd_time() {
    return end_time;
}

public void setEnd_time(String end_time) {
    this.end_time = end_time;
}

然后,我将其添加到PacketParserutils类Parsemessage()方法中.

    // ------------------------------CUSTOM ATTRIBUTES-----------------------------
    message.setChat_id(parser.getAttributeValue("", "chat_id"));
    message.setCustom_packet(parser.getAttributeValue("", "custom_packet"));
    message.setUser_id(parser.getAttributeValue("", "user_id"));
    message.setManager_id(parser.getAttributeValue("", "manager_id"));
    message.setTime_stamp(parser.getAttributeValue("", "time_stamp"));
    message.setWebsite_id(parser.getAttributeValue("", "website_id"));
    message.setVisitor_name(parser.getAttributeValue("", "visitor_name"));
    message.setEnd_time(parser.getAttributeValue("", "end_time"));

    // -----------------------------------------------------------------------------

然后,我将消息类Toxml()方法更新为此.

// ------------------------------CUSTOM TAGS-----------------------------

    if(getChat_id()!=null)
    {
        buf.append(" chat_id=\"").append(StringUtils.escapeForXML(getChat_id())).append("\"");

    }
    if(getCustom_packet()!=null)
    {
        buf.append(" custom_packet=\"").append(StringUtils.escapeForXML(getCustom_packet())).append("\"");

    }
    if(getUser_id()!=null)
    {
        buf.append(" user_id=\"").append(StringUtils.escapeForXML(getUser_id())).append("\"");

    }

    if(getManager_id()!=null)
    {
        buf.append(" manager_id=\"").append(StringUtils.escapeForXML(getManager_id())).append("\"");

    }
    if(getTime_stamp()!=null)
    {
        buf.append(" time_stamp=\"").append(StringUtils.escapeForXML(getTime_stamp())).append("\"");

    }
    if(getWebsite_id()!=null)
    {
        buf.append(" website_id=\"").append(StringUtils.escapeForXML(getWebsite_id())).append("\"");

    }
    if(getVisitor_name()!=null)
    {
        buf.append(" visitor_name=\"").append(StringUtils.escapeForXML(getVisitor_name())).append("\"");

    }
    if(getEnd_time()!=null)
    {
        buf.append(" end_time=\"").append(StringUtils.escapeForXML(getEnd_time())).append("\"");

    }

    //------------------------------------------------------------------------------------

这是我如何在消息标签中收到自定义属性的方式.

其他推荐答案

即使我认为这是错误的方法,正如我在您的另一个问题中所说的那样.这些是您要做的事情的一些准则.

您不需要修改数据包,只需扩展消息即可放入您自己的自定义属性中.这将完成发送的要求.为了接收,您将必须修改 packet.setProperty()当然,以及通过getProperty()()().这将创建和扩展到数据包,但是不需要自定义工作,因为Smack已经读/编写扩展名.

其他推荐答案

如果您可以使用SMACK中描述的自定义数据包扩展程序,请这样做.如果您希望与不支持此类扩展名的服务器或非熟练客户端兼容,例如服务器不存储它,请使用

message.addBody("varName","varValue);

<message id='8dbda9a2-1f98-478f-9a65-635f181a6ddc' 
to='oGghwFpcrR@example.com/oGghwFpcrR' type='chat'><body>abcd</body>
<body xml:lang='varName'>varValue</body><thread>8b5342dcc</thread>        
</message>

message.getBody("varName");

不是理想的解决方案,但是谁使用多个langs来进行相同的消息? Smack 应该允许您做的是注册您自己的消息解析以替换默认值,或者至少除了默认

本文地址:https://www.itbaoku.cn/post/102618.html

问题描述

The Message Packet that i want to recieve.

  <message to="39@domainname.com/smack" chat_id="73392" 
           custom_packet="true" user_id="44" manager_id="39" time_stamp="0" website_id="0" 
           visitor_name="John" end_time="False" xml:lang="en-us" type="groupchat" 
           from="room73392@conference.domainname.com/39">
           <body>Hello</body> 
           <x xmlns="http://jabber.org/protocol/muc#user"> 
           <status xmlns="" code="0"/>   
           </x></message>

Message Packet that I am Recieving.

<message to="44@domainname.com/Smack" 
    from="room73407@conference.domainname.com/Visitor1171" type="groupchat">
    <body>Hello</body>
    <delay xmlns="urn:xmpp:delay"></delay>
    <x xmlns="jabber:x:delay" stamp="20120917T05:57:19" 
    from="4732abb5@domainname.com/4732abb5">
    </x></message>

I have the Source code of a smack and Here is the packet class. Can anyone help me make my custom packet. Any help Modifying the source code is appreciated.

Code :

public abstract class Packet {

protected static final String DEFAULT_LANGUAGE =
        java.util.Locale.getDefault().getLanguage().toLowerCase();

private static String DEFAULT_XML_NS = null;

/**
 * Constant used as packetID to indicate that a packet has no id. To indicate that a packet
 * has no id set this constant as the packet's id. When the packet is asked for its id the
 * answer will be <tt>null</tt>.
 */
public static final String ID_NOT_AVAILABLE = "ID_NOT_AVAILABLE";

/**
 * Date format as defined in XEP-0082 - XMPP Date and Time Profiles.
 * The time zone is set to UTC.
 * <p>
 * Date formats are not synchronized. Since multiple threads access the format concurrently,
 * it must be synchronized externally. 
 */
public static final DateFormat XEP_0082_UTC_FORMAT = new SimpleDateFormat(
                "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
static {
    XEP_0082_UTC_FORMAT.setTimeZone(TimeZone.getTimeZone("UTC"));
}


/**
 * A prefix helps to make sure that ID's are unique across mutliple instances.
 */
private static String prefix = StringUtils.randomString(5) + "-";

/**
 * Keeps track of the current increment, which is appended to the prefix to
 * forum a unique ID.
 */
private static long id = 0;

private String xmlns = DEFAULT_XML_NS;

/**
 * Returns the next unique id. Each id made up of a short alphanumeric
 * prefix along with a unique numeric value.
 *
 * @return the next id.
 */
public static synchronized String nextID() {
    return prefix + Long.toString(id++);
}

public static void setDefaultXmlns(String defaultXmlns) {
    DEFAULT_XML_NS = defaultXmlns;
}

private String packetID = null;
private String to = null;
private String from = null;
private final List<PacketExtension> packetExtensions
        = new CopyOnWriteArrayList<PacketExtension>();

private final Map<String,Object> properties = new HashMap<String, Object>();
private XMPPError error = null;

/**
 * Returns the unique ID of the packet. The returned value could be <tt>null</tt> when
 * ID_NOT_AVAILABLE was set as the packet's id.
 *
 * @return the packet's unique ID or <tt>null</tt> if the packet's id is not available.
 */
public String getPacketID() {
    if (ID_NOT_AVAILABLE.equals(packetID)) {
        return null;
    }

    if (packetID == null) {
        packetID = nextID();
    }
    return packetID;
}

/**
 * Sets the unique ID of the packet. To indicate that a packet has no id
 * pass the constant ID_NOT_AVAILABLE as the packet's id value.
 *
 * @param packetID the unique ID for the packet.
 */
public void setPacketID(String packetID) {
    this.packetID = packetID;
}

/**
 * Returns who the packet is being sent "to", or <tt>null</tt> if
 * the value is not set. The XMPP protocol often makes the "to"
 * attribute optional, so it does not always need to be set.<p>
 *
 * The StringUtils class provides several useful methods for dealing with
 * XMPP addresses such as parsing the
 * {@link StringUtils#parseBareAddress(String) bare address},
 * {@link StringUtils#parseName(String) user name},
 * {@link StringUtils#parseServer(String) server}, and
 * {@link StringUtils#parseResource(String) resource}.  
 *
 * @return who the packet is being sent to, or <tt>null</tt> if the
 *      value has not been set.
 */
public String getTo() {
    return to;
}

/**
 * Sets who the packet is being sent "to". The XMPP protocol often makes
 * the "to" attribute optional, so it does not always need to be set.
 *
 * @param to who the packet is being sent to.
 */
public void setTo(String to) {
    this.to = to;
}

/**
 * Returns who the packet is being sent "from" or <tt>null</tt> if
 * the value is not set. The XMPP protocol often makes the "from"
 * attribute optional, so it does not always need to be set.<p>
 *
 * The StringUtils class provides several useful methods for dealing with
 * XMPP addresses such as parsing the
 * {@link StringUtils#parseBareAddress(String) bare address},
 * {@link StringUtils#parseName(String) user name},
 * {@link StringUtils#parseServer(String) server}, and
 * {@link StringUtils#parseResource(String) resource}.  
 *
 * @return who the packet is being sent from, or <tt>null</tt> if the
 *      value has not been set.
 */
public String getFrom() {
    return from;
}

/**
 * Sets who the packet is being sent "from". The XMPP protocol often
 * makes the "from" attribute optional, so it does not always need to
 * be set.
 *
 * @param from who the packet is being sent to.
 */
public void setFrom(String from) {
    this.from = from;
}

/**
 * Returns the error associated with this packet, or <tt>null</tt> if there are
 * no errors.
 *
 * @return the error sub-packet or <tt>null</tt> if there isn't an error.
 */
public XMPPError getError() {
    return error;
}

/**
 * Sets the error for this packet.
 *
 * @param error the error to associate with this packet.
 */
public void setError(XMPPError error) {
    this.error = error;
}

/**
 * Returns an unmodifiable collection of the packet extensions attached to the packet.
 *
 * @return the packet extensions.
 */
public synchronized Collection<PacketExtension> getExtensions() {
    if (packetExtensions == null) {
        return Collections.emptyList();
    }
    return Collections.unmodifiableList(new ArrayList<PacketExtension>(packetExtensions));
}

/**
 * Returns the first extension of this packet that has the given namespace.
 *
 * @param namespace the namespace of the extension that is desired.
 * @return the packet extension with the given namespace.
 */
public PacketExtension getExtension(String namespace) {
    return getExtension(null, namespace);
}

/**
 * Returns the first packet extension that matches the specified element name and
 * namespace, or <tt>null</tt> if it doesn't exist. If the provided elementName is null
 * than only the provided namespace is attempted to be matched. Packet extensions are
 * are arbitrary XML sub-documents in standard XMPP packets. By default, a 
 * DefaultPacketExtension instance will be returned for each extension. However, 
 * PacketExtensionProvider instances can be registered with the 
 * {@link org.jivesoftware.smack.provider.ProviderManager ProviderManager}
 * class to handle custom parsing. In that case, the type of the Object
 * will be determined by the provider.
 *
 * @param elementName the XML element name of the packet extension. (May be null)
 * @param namespace the XML element namespace of the packet extension.
 * @return the extension, or <tt>null</tt> if it doesn't exist.
 */
public PacketExtension getExtension(String elementName, String namespace) {
    if (namespace == null) {
        return null;
    }
    for (PacketExtension ext : packetExtensions) {
        if ((elementName == null || elementName.equals(ext.getElementName()))
                && namespace.equals(ext.getNamespace()))
        {
            return ext;
        }
    }
    return null;
}

/**
 * Adds a packet extension to the packet.
 *
 * @param extension a packet extension.
 */
public void addExtension(PacketExtension extension) {
    packetExtensions.add(extension);
}

/**
 * Removes a packet extension from the packet.
 *
 * @param extension the packet extension to remove.
 */
public void removeExtension(PacketExtension extension)  {
    packetExtensions.remove(extension);
}

/**
 * Returns the packet property with the specified name or <tt>null</tt> if the
 * property doesn't exist. Property values that were orginally primitives will
 * be returned as their object equivalent. For example, an int property will be
 * returned as an Integer, a double as a Double, etc.
 *
 * @param name the name of the property.
 * @return the property, or <tt>null</tt> if the property doesn't exist.
 */
public synchronized Object getProperty(String name) {
    if (properties == null) {
        return null;
    }
    return properties.get(name);
}

/**
 * Sets a property with an Object as the value. The value must be Serializable
 * or an IllegalArgumentException will be thrown.
 *
 * @param name the name of the property.
 * @param value the value of the property.
 */
public synchronized void setProperty(String name, Object value) {
    if (!(value instanceof Serializable)) {
        throw new IllegalArgumentException("Value must be serialiazble");
    }
    properties.put(name, value);
}

/**
 * Deletes a property.
 *
 * @param name the name of the property to delete.
 */
public synchronized void deleteProperty(String name) {
    if (properties == null) {
        return;
    }
    properties.remove(name);
}

/**
 * Returns an unmodifiable collection of all the property names that are set.
 *
 * @return all property names.
 */
public synchronized Collection<String> getPropertyNames() {
    if (properties == null) {
        return Collections.emptySet();
    }
    return Collections.unmodifiableSet(new HashSet<String>(properties.keySet()));
}

/**
 * Returns the packet as XML. Every concrete extension of Packet must implement
 * this method. In addition to writing out packet-specific data, every sub-class
 * should also write out the error and the extensions data if they are defined.
 *
 * @return the XML format of the packet as a String.
 */
public abstract String toXML();

/**
 * Returns the extension sub-packets (including properties data) as an XML
 * String, or the Empty String if there are no packet extensions.
 *
 * @return the extension sub-packets as XML or the Empty String if there
 * are no packet extensions.
 */
protected synchronized String getExtensionsXML() {
    StringBuilder buf = new StringBuilder();
    // Add in all standard extension sub-packets.
    for (PacketExtension extension : getExtensions()) {
        buf.append(extension.toXML());
    }
    // Add in packet properties.
    if (properties != null && !properties.isEmpty()) {
        buf.append("<properties xmlns=\"http://www.jivesoftware.com/xmlns/xmpp/properties\">");
        // Loop through all properties and write them out.
        for (String name : getPropertyNames()) {
            Object value = getProperty(name);
            buf.append("<property>");
            buf.append("<name>").append(StringUtils.escapeForXML(name)).append("</name>");
            buf.append("<value type=\"");
            if (value instanceof Integer) {
                buf.append("integer\">").append(value).append("</value>");
            }
            else if (value instanceof Long) {
                buf.append("long\">").append(value).append("</value>");
            }
            else if (value instanceof Float) {
                buf.append("float\">").append(value).append("</value>");
            }
            else if (value instanceof Double) {
                buf.append("double\">").append(value).append("</value>");
            }
            else if (value instanceof Boolean) {
                buf.append("boolean\">").append(value).append("</value>");
            }
            else if (value instanceof String) {
                buf.append("string\">");
                buf.append(StringUtils.escapeForXML((String)value));
                buf.append("</value>");
            }
            // Otherwise, it's a generic Serializable object. Serialized objects are in
            // a binary format, which won't work well inside of XML. Therefore, we base-64
            // encode the binary data before adding it.
            else {
                ByteArrayOutputStream byteStream = null;
                ObjectOutputStream out = null;
                try {
                    byteStream = new ByteArrayOutputStream();
                    out = new ObjectOutputStream(byteStream);
                    out.writeObject(value);
                    buf.append("java-object\">");
                    String encodedVal = StringUtils.encodeBase64(byteStream.toByteArray());
                    buf.append(encodedVal).append("</value>");
                }
                catch (Exception e) {
                    e.printStackTrace();
                }
                finally {
                    if (out != null) {
                        try {
                            out.close();
                        }
                        catch (Exception e) {
                            // Ignore.
                        }
                    }
                    if (byteStream != null) {
                        try {
                            byteStream.close();
                        }
                        catch (Exception e) {
                            // Ignore.
                        }
                    }
                }
            }
            buf.append("</property>");
        }
        buf.append("</properties>");
    }
    return buf.toString();
}

public String getXmlns() {
    return this.xmlns;
}

public static String getDefaultLanguage() {
    return DEFAULT_LANGUAGE;
}


@Override
public boolean equals(Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    Packet packet = (Packet) o;

    if (error != null ? !error.equals(packet.error) : packet.error != null) { return false; }
    if (from != null ? !from.equals(packet.from) : packet.from != null) { return false; }
    if (!packetExtensions.equals(packet.packetExtensions)) { return false; }
    if (packetID != null ? !packetID.equals(packet.packetID) : packet.packetID != null) {
        return false;
    }
    if (properties != null ? !properties.equals(packet.properties)
            : packet.properties != null) {
        return false;
    }
    if (to != null ? !to.equals(packet.to) : packet.to != null)  { return false; }
    return !(xmlns != null ? !xmlns.equals(packet.xmlns) : packet.xmlns != null);
}

@Override
public int hashCode() {
    int result;
    result = (xmlns != null ? xmlns.hashCode() : 0);
    result = 31 * result + (packetID != null ? packetID.hashCode() : 0);
    result = 31 * result + (to != null ? to.hashCode() : 0);
    result = 31 * result + (from != null ? from.hashCode() : 0);
    result = 31 * result + packetExtensions.hashCode();
    result = 31 * result + properties.hashCode();
    result = 31 * result + (error != null ? error.hashCode() : 0);
    return result;
}
}

推荐答案

I added new Fields in Packet Class and wrote there Getter and Setter.

private String chat_id = null;
private String custom_packet = null;
private String user_id=null;
private String manager_id=null;
private String time_stamp=null;
private String website_id=null;
private String visitor_name=null;
private String end_time=null;




public String getChat_id() {
    return chat_id;
}

public void setChat_id(String chat_id) {
    this.chat_id = chat_id;
}

public String getCustom_packet() {
    return custom_packet;
}

public void setCustom_packet(String custom_packet) {
    this.custom_packet = custom_packet;
}

public String getUser_id() {
    return user_id;
}

public void setUser_id(String user_id) {
    this.user_id = user_id;
}

public String getManager_id() {
    return manager_id;
}

public void setManager_id(String manager_id) {
    this.manager_id = manager_id;
}

public String getTime_stamp() {
    return time_stamp;
}

public void setTime_stamp(String time_stamp) {
    this.time_stamp = time_stamp;
}

public String getWebsite_id() {
    return website_id;
}

public void setWebsite_id(String website_id) {
    this.website_id = website_id;
}

public String getVisitor_name() {
    return visitor_name;
}

public void setVisitor_name(String visitor_name) {
    this.visitor_name = visitor_name;
}

public String getEnd_time() {
    return end_time;
}

public void setEnd_time(String end_time) {
    this.end_time = end_time;
}

Then i added this to PacketParserUtils Class parseMessage() method.

    // ------------------------------CUSTOM ATTRIBUTES-----------------------------
    message.setChat_id(parser.getAttributeValue("", "chat_id"));
    message.setCustom_packet(parser.getAttributeValue("", "custom_packet"));
    message.setUser_id(parser.getAttributeValue("", "user_id"));
    message.setManager_id(parser.getAttributeValue("", "manager_id"));
    message.setTime_stamp(parser.getAttributeValue("", "time_stamp"));
    message.setWebsite_id(parser.getAttributeValue("", "website_id"));
    message.setVisitor_name(parser.getAttributeValue("", "visitor_name"));
    message.setEnd_time(parser.getAttributeValue("", "end_time"));

    // -----------------------------------------------------------------------------

Then i updated the Message Class toXML() method to this.

// ------------------------------CUSTOM TAGS-----------------------------

    if(getChat_id()!=null)
    {
        buf.append(" chat_id=\"").append(StringUtils.escapeForXML(getChat_id())).append("\"");

    }
    if(getCustom_packet()!=null)
    {
        buf.append(" custom_packet=\"").append(StringUtils.escapeForXML(getCustom_packet())).append("\"");

    }
    if(getUser_id()!=null)
    {
        buf.append(" user_id=\"").append(StringUtils.escapeForXML(getUser_id())).append("\"");

    }

    if(getManager_id()!=null)
    {
        buf.append(" manager_id=\"").append(StringUtils.escapeForXML(getManager_id())).append("\"");

    }
    if(getTime_stamp()!=null)
    {
        buf.append(" time_stamp=\"").append(StringUtils.escapeForXML(getTime_stamp())).append("\"");

    }
    if(getWebsite_id()!=null)
    {
        buf.append(" website_id=\"").append(StringUtils.escapeForXML(getWebsite_id())).append("\"");

    }
    if(getVisitor_name()!=null)
    {
        buf.append(" visitor_name=\"").append(StringUtils.escapeForXML(getVisitor_name())).append("\"");

    }
    if(getEnd_time()!=null)
    {
        buf.append(" end_time=\"").append(StringUtils.escapeForXML(getEnd_time())).append("\"");

    }

    //------------------------------------------------------------------------------------

This how i was able to Recieve custom attributes in MESSAGE TAG.

其他推荐答案

Even though I think this is the wrong approach, as I said in your other question. These are a few guidelines to what you are trying to do.

You don't need to modify Packet, just extend Message to put in your own custom attributes. This will accomplish what is required for the sending. For receiving, you will have to modify PacketParserUtil.parseMessage() to be able to determine whether your custom message or a standard message is being sent and construct and populate as appropriate. I don't know if the server you are using may have issues with this or not, due to it being non-standard, but it will probably work.

Another simpler option would be to simply add your attributes as properties to the standard Message via Packet.setProperty() and of course read via the getProperty(). This will create and extension to the packet, but no custom work is required as Smack will already read/write the extension.

其他推荐答案

If you can add use a custom packet extension like described in smack, then do so. If you're looking to be compatible with a server or non-smack client that does not support such extensions, like if the server won't store it, then use

message.addBody("varName","varValue);

<message id='8dbda9a2-1f98-478f-9a65-635f181a6ddc' 
to='oGghwFpcrR@example.com/oGghwFpcrR' type='chat'><body>abcd</body>
<body xml:lang='varName'>varValue</body><thread>8b5342dcc</thread>        
</message>

message.getBody("varName");

Not an ideal solution, but who uses multiple langs for an identical message anyway? What Smack should allow you to do is register for your own message parsing to replace the default, or at least in addition to the default