Android 基于XMPP Smack Openfire 搜索服务器的联系人
Android Smack UserSearchManager (java.lang.ClassCastException java.lang.NullPointerException)
用smack 开发IM 聊天工具时, 会用到UserSearchManager 来搜索服务器的联系人 判断用户是否存在等等，代码如下：
此时红色部分会报 java.lang.NullPointerException, 一种解决办法是在红色代码前加：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()); }
