asmack 搜索好友报空指针解决方案

第一种

在  connection.connect();  建立连接之前

调用这个方法

SmackAndroid.init(this);

第二种

public static 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());
	}

在connection.connect();  建立连接之前

调用

configure(ProviderManager.getInstance());

/**
	 * 查询用户
	 *
	 * @param connection
	 * @param serverDomain
	 * @param userName
	 * @return
	 * @throws XMPPException
	 */
	public static List<UserBean> searchUsers(XMPPConnection connection,String userName) throws XMPPException
    {
        List<UserBean> results = new ArrayList<UserBean>();
        System.out.println("查询开始..............."+connection.getHost()+connection.getServiceName());
        UserSearchManager usm = new UserSearchManager(connection);
        Form searchForm = usm.getSearchForm("search."+connection.getServiceName());
        Form answerForm = searchForm.createAnswerForm();
        answerForm.setAnswer("Username", true);
        answerForm.setAnswer("search", userName);
        ReportedData data = usm.getSearchResults(answerForm, "search."+connection.getServiceName());
         Iterator<Row> it = data.getRows();
         Row row = null;
         UserBean user = null;
         while(it.hasNext())  {
             user = new UserBean();
             row = it.next();
             user.setUsername(row.getValues("Username").next().toString());
             user.setName(row.getValues("Name").next().toString());
             user.setEmail(row.getValues("Email").next().toString());
             System.out.println(row.getValues("Username").next());
             System.out.println(row.getValues("Name").next());
             System.out.println(row.getValues("Email").next());
             results.add(user);
             //若存在，则有返回,UserName一定非空，其他两个若是有设，一定非空
         }
         Toast.makeText(context, results.size()+"",1000).show();
         return results;
    }