asmack查询用户,searchForm出现nullpointer的解决办法。
原因：
the smack.providers file, usually in /META-INF folder in normal versions of smack, can't be loaded in Android because its jar packaging. So all the providers must be initialized by hand
大概是说由于smack.providers 的文件不能载入asmack中导致的。所以必须我们自己手动载入一个。
先复制下面代码：
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XMPPConnection实例化之前载入就可以解决了。
configure(ProviderManager.getInstance());