我正在使用Smack和Openfire服务器作为聊天客户端，所有工作都很好，如聊天，发送新用户邀请，获取可用用户列表等。当我尝试从中发送文件时遇到ClassCastException错误一个Android客户端使用下面的代码给另一个用户，它给了我一堆错误。
ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
if (sdm == null)
sdm = new ServiceDiscoveryManager(connection);
sdm.addFeature("http://jabber.org/protocol/disco#info");
sdm.addFeature("jabber:iq:privacy");
fileTransfer(fileName, recepient.getText().toString() + "/Spark 2.6.3");
public void fileTransfer(String fileName, String destination) throws XMPPException {
FileTransferNegotiator.setServiceEnabled(connection,true);
OutgoingFileTransfer transfer = manager.createOutgoingFileTransfer(destination);
transfer.sendFile(new File(fileName), "You won't believe this!");
try {
Thread.sleep(10000);
}
catch(Exception e){
Toast.makeText(getActivity(), "Exception " + e, Toast.LENGTH_LONG).show();
}
System.out.println("Status :: " + transfer.getStatus() + " Error :: " + transfer.getError() + " Exception :: " + transfer.getException());
System.out.println("Is it done? " + transfer.isDone());
Toast.makeText(getActivity(), "Status :: " + transfer.getStatus() + " Error :: " + transfer.getError() + " Exception :: " + transfer.getException(), Toast.LENGTH_LONG).show();
Log.v("ONMESSAGE", "Status :: " + transfer.getStatus() + " Error :: " + transfer.getError() + " Exception :: " + transfer.getException());
}
当我尝试发送文件时，它会显示在另一端的火花上，但是当点击“接受”时，不会启动文件传输，而是显示“传输文件时出错”。
在错误日志中，它显示以下错误：
07-25 12:08:22.393: E/AndroidRuntime(27708): java.lang.ClassCastException: org.jivesoftware.smack.PacketReader$4 cannot be cast to org.jivesoftware.smackx.packet.StreamInitiation
07-25 12:08:22.393: E/AndroidRuntime(27708): at org.jivesoftware.smackx.filetransfer.FileTransferNegotiator.negotiateOutgoingTransfer(FileTransferNegotiator.java:401)
07-25 12:08:22.393: E/AndroidRuntime(27708): at org.jivesoftware.smackx.filetransfer.OutgoingFileTransfer.negotiateStream(OutgoingFileTransfer.java:300)
07-25 12:08:22.393: E/AndroidRuntime(27708): at org.jivesoftware.smackx.filetransfer.OutgoingFileTransfer.access$100(OutgoingFileTransfer.java:35)
07-25 12:08:22.393: E/AndroidRuntime(27708): at org.jivesoftware.smackx.filetransfer.OutgoingFileTransfer$2.run(OutgoingFileTransfer.java:214)
07-25 12:08:22.393: E/AndroidRuntime(27708): at java.lang.Thread.run(Thread.java:838)
N.B。：我正在使用Smack Library。
将以下方法添加到您的类。
public void configure(ProviderManager pm) {
pm.addIQProvider("query", "jabber:iq:private",
new PrivateDataManager.PrivateDataIQProvider());
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");
}
pm.addExtensionProvider("x", "jabber:x:roster",
new RosterExchangeProvider());
pm.addExtensionProvider("x", "jabber:x:event",
new MessageEventProvider());
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());
pm.addExtensionProvider("html", "http://jabber.org/protocol/xhtml-im",
new XHTMLExtensionProvider());
pm.addExtensionProvider("x", "jabber:x:conference",
new GroupChatInvitation.Provider());
pm.addIQProvider("query", "http://jabber.org/protocol/disco#items",
new DiscoverItemsProvider());
pm.addIQProvider("query", "http://jabber.org/protocol/disco#info",
new DiscoverInfoProvider());
pm.addExtensionProvider("x", "jabber:x:data", new DataFormProvider());
pm.addExtensionProvider("x", "http://jabber.org/protocol/muc#user",
new MUCUserProvider());
pm.addIQProvider("query", "http://jabber.org/protocol/muc#admin",
new MUCAdminProvider());
pm.addIQProvider("query", "http://jabber.org/protocol/muc#owner",
new MUCOwnerProvider());
pm.addExtensionProvider("x", "jabber:x:delay",
new DelayInformationProvider());
try {
pm.addIQProvider("query", "jabber:iq:version",
Class.forName("org.jivesoftware.smackx.packet.Version"));
} catch (ClassNotFoundException e) {
// Not sure what's happening here.
}
pm.addIQProvider("vCard", "vcard-temp", new VCardProvider());
pm.addIQProvider("offline", "http://jabber.org/protocol/offline",
new OfflineMessageRequest.Provider());
pm.addExtensionProvider("offline","http://jabber.org/protocol/offline",new OfflineMessageInfo.Provider());
pm.addIQProvider("query", "jabber:iq:last", new LastActivity.Provider());
pm.addIQProvider("query", "jabber:iq:search", new UserSearch.Provider());
pm.addIQProvider("sharedgroup","http://www.jivesoftware.org/protocol/sharedgroup",new SharedGroupsInfo.Provider());
pm.addExtensionProvider("addresses","http://jabber.org/protocol/address",new MultipleAddressesProvider());
pm.addIQProvider("si", "http://jabber.org/protocol/si",new StreamInitiationProvider());
pm.addIQProvider("query", "http://jabber.org/protocol/bytestreams",
new BytestreamsProvider());
pm.addIQProvider("query", "jabber:iq:privacy", new PrivacyProvider());
}
就在调用connect函数之前。用这样的方法调用方法。
configure(ProviderManager.getInstance());