发送和接收 IQ XMPP ASMACK Android

Question

背景：

我已经能够使用asmack 库在android 中通过XMPP 实现一对一聊天。我也可以将状态发送到服务器。我正在为基于聊天的应用程序使用OpenFire 服务器。

问题： 我正在使用connection.addPacketListener(new PacketListener() 接收消息和 IQ 数据包，对于消息数据包我已经这样分类了

PacketFilter Chatfilter = new MessageTypeFilter(Message.Type.chat);
connection.addPacketListener(new PacketListener() {
        public void processPacket(Packet packet) {
            Message message = (Message) packet;
            if (message.getBody() != null) {
                String fromName = StringUtils.parseBareAddress(message.getFrom());
                Log.i("XMPPClient", "Got text [" + message.getBody() + "] from [" + fromName + "]");
                messages.add(fromName + ":");
                m1=message.getBody();
                messages.add(message.getBody());
                // Add the incoming message to the list view
                /* mHandler.post(new Runnable() {
                public void run() {
                setListAdapter();
                recieve.setText(m1);
                }
                });*/
            }
        }
}, Chatfilter);

一切正常，但是问题出现了我使用类似的东西来接收 IQ 数据包

这是我用来接收 IQ 数据包的代码

PacketFilter Iqfilter = new IQTypeFilter(IQ.Type.RESULT);
connection.addPacketListener(new PacketListener() {
    public void processPacket(Packet packet) {
        IQ iq = (IQ) packet;
        String fromName = StringUtils.parseBareAddress(iq.getFrom());
        Log.i("XMPPClient", "Got text [" + iq.toString() + "] from [" + fromName + "]");
        m1=iq.getFrom();
        mHandler.post(new Runnable() {
            public void run() {
                setListAdapter();
                recieve.setText(m1);
            }
        });
    }
}, Iqfilter);

我正在发送一个简单的disco#items 查询并且它没有响应，即使它没有进入函数，我也尝试过调试它，我也尝试过发送简单的PING 命令但它确实也不回应。 我在这里错过了什么？

其次，我在向服务器或其他客户端发送 IQ 数据包时也遇到了问题。我在某处读到我应该这样做。但它不起作用。

final IQ iq = new IQ() {
            public String getChildElementXML() { 
            return "<query xmlns='http://jabber.org/protocol/disco#info'/>"; // here is your query
            //this returns "<iq type='get' from='User@YourServer/Resource' id='info1'> <query xmlns='http://jabber.org/protocol/disco#info'/></iq>";
             }};
            // set the type
            iq.setType(IQ.Type.GET);

            // send the request
            connection.sendPacket(iq);

令人困惑的是，当我阅读 XMPP 和 asmack for android 的文档时，写到要发送 IQ，您还需要有接收者的地址。但在这段代码中，我们没有设置任何接收器。

互联网上有关 XMPP asmack 和 Android 的信息要少得多。

Answer 1

例如发送自定义消息时，

<iq id='123' type='get' from='client@xmpp/B' to='client2@xmpp/s2'><req var='read'><attr var='temprature'/></req></iq>

您需要定义自己的 IQ 并发送此 IQ：

public class MyIQ extends IQ {
        @Override
        public String getChildElementXML() {
            StringBuilder stringBuilder = new StringBuilder();
            stringBuilder.append("<req var='read'>< attr var='temprature'/></req>");
            return stringBuilder.toString();
        }
    }

    MyIQ packet = new MyIQ();
    packet.setType(IQ.Type.GET);
    packet.setFrom("client@xmpp/B");
    packet.setTo("client2@xmpp/s2");
    xmppConnection.sendPacket(packet);

Answer 2

发送出去，其实只需要构造xml字符串并在getChildElementXML()中返回，不需要其他设置。

为了接收IQ响应，首先需要创建IQProvider并添加到ProviderManager，匹配查询对象中的xmlns。 IQProvider 用于将响应数据包转换为您自定义的 IQ 对象。然后，您需要扩展 PacketListener，并在创建连接对象时，将侦听器添加到其中，并使用 PacketTypeFilter 来匹配您的 IQ 类。正确设置提供者和侦听器后，您应该能够收到 IQ 的响应。

这是参考：https://billynyh.github.io/blog/2014/09/28/android-xmpp-dev/

Answer 3

我认为问题在于您的提供商未注册。请查看this。在 Android 上，您必须在建立 XMPP 连接之前手动注册提供程序。将下面的类复制到您的项目中

import org.jivesoftware.smack.provider.PrivacyProvider;
import org.jivesoftware.smack.provider.ProviderManager;
import org.jivesoftware.smackx.GroupChatInvitation;
import org.jivesoftware.smackx.PrivateDataManager;
import org.jivesoftware.smackx.packet.ChatStateExtension;
import org.jivesoftware.smackx.packet.LastActivity;
import org.jivesoftware.smackx.packet.OfflineMessageInfo;
import org.jivesoftware.smackx.packet.OfflineMessageRequest;
import org.jivesoftware.smackx.packet.SharedGroupsInfo;
import org.jivesoftware.smackx.provider.AdHocCommandDataProvider;
import org.jivesoftware.smackx.provider.BytestreamsProvider;
import org.jivesoftware.smackx.provider.DataFormProvider;
import org.jivesoftware.smackx.provider.DelayInformationProvider;
import org.jivesoftware.smackx.provider.DiscoverInfoProvider;
import org.jivesoftware.smackx.provider.DiscoverItemsProvider;
import org.jivesoftware.smackx.provider.MUCAdminProvider;
import org.jivesoftware.smackx.provider.MUCOwnerProvider;
import org.jivesoftware.smackx.provider.MUCUserProvider;
import org.jivesoftware.smackx.provider.MessageEventProvider;
import org.jivesoftware.smackx.provider.MultipleAddressesProvider;
import org.jivesoftware.smackx.provider.RosterExchangeProvider;
import org.jivesoftware.smackx.provider.StreamInitiationProvider;
import org.jivesoftware.smackx.provider.VCardProvider;
import org.jivesoftware.smackx.provider.XHTMLExtensionProvider;
import org.jivesoftware.smackx.search.UserSearch;

import android.util.Log;

public class ServiceProviders {
    public static void Register_Providers(ProviderManager pm) {

        // Private Data Storage
        pm.addIQProvider("query", "jabber:iq:private",
                new PrivateDataManager.PrivateDataIQProvider());

        // Time
        try {
            pm.addIQProvider("query", "jabber:iq:time",
                    Class.forName("org.jivesoftware.smackx.packet.Time"));
        } catch (ClassNotFoundException e) {
            Log.w("TestClient",
                    "Can't load class for org.jivesoftware.smackx.packet.Time");
        }

        // Roster Exchange
        pm.addExtensionProvider("x", "jabber:x:roster",
                new RosterExchangeProvider());

        // Message Events
        pm.addExtensionProvider("x", "jabber:x:event",
                new MessageEventProvider());

        // Chat State
        pm.addExtensionProvider("active",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());

        pm.addExtensionProvider("composing",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());

        pm.addExtensionProvider("paused",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());

        pm.addExtensionProvider("inactive",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());

        pm.addExtensionProvider("gone",
                "http://jabber.org/protocol/chatstates",
                new ChatStateExtension.Provider());

        // XHTML
        pm.addExtensionProvider("html", "http://jabber.org/protocol/xhtml-im",
                new XHTMLExtensionProvider());

        // Group Chat Invitations
        pm.addExtensionProvider("x", "jabber:x:conference",
                new GroupChatInvitation.Provider());

        // 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());

        // Data Forms
        pm.addExtensionProvider("x", "jabber:x:data", new DataFormProvider());

        // MUC User
        pm.addExtensionProvider("x", "http://jabber.org/protocol/muc#user",
                new MUCUserProvider());

        // MUC Admin
        pm.addIQProvider("query", "http://jabber.org/protocol/muc#admin",
                new MUCAdminProvider());

        // MUC Owner
        pm.addIQProvider("query", "http://jabber.org/protocol/muc#owner",
                new MUCOwnerProvider());

        // Delayed Delivery
        pm.addExtensionProvider("x", "jabber:x:delay",
                new DelayInformationProvider());

        // Version
        try {
            pm.addIQProvider("query", "jabber:iq:version",
                    Class.forName("org.jivesoftware.smackx.packet.Version"));
        } catch (ClassNotFoundException e) {
            // Not sure what's happening here.
        }

        // VCard
        pm.addIQProvider("vCard", "vcard-temp", new VCardProvider());

        // 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());

        // Last Activity
        pm.addIQProvider("query", "jabber:iq:last", new LastActivity.Provider());

        // User Search
        pm.addIQProvider("query", "jabber:iq:search", new UserSearch.Provider());

        // SharedGroupsInfo
        pm.addIQProvider("sharedgroup",
                "http://www.jivesoftware.org/protocol/sharedgroup",
                new SharedGroupsInfo.Provider());

        // JEP-33: Extended Stanza Addressing
        pm.addExtensionProvider("addresses",
                "http://jabber.org/protocol/address",
                new MultipleAddressesProvider());

        // FileTransfer
        pm.addIQProvider("si", "http://jabber.org/protocol/si",
                new StreamInitiationProvider());

        pm.addIQProvider("query", "http://jabber.org/protocol/bytestreams",
                new BytestreamsProvider());

        // Privacy
        pm.addIQProvider("query", "jabber:iq:privacy", new PrivacyProvider());

        pm.addIQProvider("command", "http://jabber.org/protocol/commands",
                new AdHocCommandDataProvider());
        pm.addExtensionProvider("malformed-action",
                "http://jabber.org/protocol/commands",
                new AdHocCommandDataProvider.MalformedActionError());
        pm.addExtensionProvider("bad-locale",
                "http://jabber.org/protocol/commands",
                new AdHocCommandDataProvider.BadLocaleError());
        pm.addExtensionProvider("bad-payload",
                "http://jabber.org/protocol/commands",
                new AdHocCommandDataProvider.BadPayloadError());
        pm.addExtensionProvider("bad-sessionid",
                "http://jabber.org/protocol/commands",
                new AdHocCommandDataProvider.BadSessionIDError());
        pm.addExtensionProvider("session-expired",
                "http://jabber.org/protocol/commands",
                new AdHocCommandDataProvider.SessionExpiredError());

        pm.addIQProvider("query", "http://jabber.org/protocol/disco#info",
                new DiscoverInfoProvider());
        pm.addExtensionProvider("x", "jabber:x:data", new DataFormProvider());
        // pm.addExtensionProvider("status ","", new XMLPlayerList());

    }
}

这样调用这个方法

ServiceProviders.Register_Providers(ProviderManager.getInstance());

因此，请尝试在您的应用启动时或在建立连接之前调用此方法。

希望对你有帮助