在XMPP中使用带有aSmack的UserSearch时,getSearchForm返回null

Question

我有这个代码,几乎没有修改过的例子:

                UserSearchManager usm = new UserSearchManager(conn);
                Form searchForm = usm.getSearchForm("search.myserver.com");
                Form answerForm = searchForm.createAnswerForm();
                answerForm.setAnswer("Username", true);
                answerForm.setAnswer("search", contact.getJid());
                ReportedData data = usm.getSearchResults(answerForm, "search.myserver.com");

这在桌面环境中完美地运行,使用Smack库,但我不能让它在Android中工作(我必须使用asmack).

问题是searchForm为null,因为getSearchForm返回null.这看起来很奇怪,因为我似乎无法找到哪些方法应该返回null的任何文档.

服务器是Openfire,如果有帮助的话.

Answer 1

2014年4月更新

下面的原始答案包含现在陈旧和过时的信息.由于aSmack 0.8,不再需要手动配置提供程序管理器.调用SmackAndroid.init(Context)aSmack README告诉您这样做,负责所有必要的初始化.

原始答案

最后,这个问题对所有人来说都是全球性的.这似乎是一个众所周知的问题:smack.providers文件,通常在正常版本的smack中的/ META-INF文件夹中,因为它的jar包装无法在Android中加载.因此,必须手动初始化所​​有提供者,如Mike Ryan在此主题中的回答所示:http://community.igniterealtime.org/message/201866#201866

我删除了那些对我不起作用的东西,这就是结果.

public void configure(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());

}

我只评论了几行,并且瞧瞧.这应该在实例化XMPPConnection之前调用,使用如下行:

    configure(ProviderManager.getInstance());

现在我将不得不处理我的其他问题,但至少这个问题已经解决了:)