Android 接收过程中的套接字io错误

我正在使用socket io通过库gotox/socket.io-java-client制作android应用程序。我成功地将数据发送到服务器，但在接收来自服务器的响应时遇到问题。我收到了这些错误

09-14 01:31:43.441: E/AndroidRuntime(585): FATAL EXCEPTION: main
09-14 01:31:43.441: E/AndroidRuntime(585): java.lang.NullPointerException
09-14 01:31:43.441: E/AndroidRuntime(585):  at a.a.a.SocketsActivity$1.onClick(SocketsActivity.java:121)
09-14 01:31:43.441: E/AndroidRuntime(585):  at android.view.View.performClick(View.java:2408)
09-14 01:31:43.441: E/AndroidRuntime(585):  at android.view.View$PerformClick.run(View.java:8816)
09-14 01:31:43.441: E/AndroidRuntime(585):  at android.os.Handler.handleCallback(Handler.java:587)
09-14 01:31:43.441: E/AndroidRuntime(585):  at android.os.Handler.dispatchMessage(Handler.java:92)
09-14 01:31:43.441: E/AndroidRuntime(585):  at android.os.Looper.loop(Looper.java:123)
09-14 01:31:43.441: E/AndroidRuntime(585):  at android.app.ActivityThread.main(ActivityThread.java:4627)
09-14 01:31:43.441: E/AndroidRuntime(585):  at java.lang.reflect.Method.invokeNative(Native Method)
09-14 01:31:43.441: E/AndroidRuntime(585):  at java.lang.reflect.Method.invoke(Method.java:521)
09-14 01:31:43.441: E/AndroidRuntime(585):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-14 01:31:43.441: E/AndroidRuntime(585):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-14 01:31:43.441: E/AndroidRuntime(585):  at dalvik.system.NativeStart.main(Native Method)
09-14 01:31:48.433: I/global(585): Default buffer size used in BufferedOutputStream constructor. It would be better to be explicit if an 8k buffer is required.
09-14 01:31:49.481: I/io.socket(585): > 3:::{"Action":  "AuthenticateUser","Parameters":[{"UserName": "a","Password": "a"}]}
09-14 01:31:49.481: I/io.socket(585): < 1::
09-14 01:31:50.681: I/io.socket(585): < 5:::{"name":"message","args":[{"Action":"AuthenticateUser","RequestStatus":"100","RequestStatusMessage":"Invalid UserName/password"}]}
09-14 01:31:50.681: W/System.err(585): a.a.a.SocketIOException: Exception was thrown in on(String, JSONObject[]).
09-14 01:31:50.681: W/System.err(585): Message was: 5:::{"name":"message","args":[{"Action":"AuthenticateUser","RequestStatus":"100","RequestStatusMessage":"Invalid UserName/password"}]}
09-14 01:31:50.691: W/System.err(585):  at a.a.a.IOConnection.transportMessage(IOConnection.java:684)
09-14 01:31:50.691: W/System.err(585):  at a.a.a.WebsocketTransport.onMessage(WebsocketTransport.java:99)
09-14 01:31:50.691: W/System.err(585):  at de.roderick.weberknecht.WebSocketReceiver.run(WebSocketReceiver.java:57)
09-14 01:31:50.691: W/System.err(585): Caused by: java.lang.ClassCastException: a.a.a.IOConnection
09-14 01:31:50.691: W/System.err(585):  at a.a.a.IOConnection.findCallback(IOConnection.java:487)
09-14 01:31:50.701: W/System.err(585):  at a.a.a.IOConnection.transportMessage(IOConnection.java:679)
09-14 01:31:50.701: W/System.err(585):  ... 2 more

我找到了导致异常的行

public void transportMessage(String text) {
        logger.info("< " + text);
        IOMessage message;
        try {
            message = new IOMessage(text);
        } catch (Exception e) {
            error(new SocketIOException("Garbage from server: " + text, e));
            return;
        }
        resetTimeout();
switch (message.getType()) {
        case IOMessage.TYPE_DISCONNECT:
            try {
                findCallback(message).onDisconnect();
            } catch (Exception e) {
                error(new SocketIOException(
                        "Exception was thrown in onDisconnect()", e));
            }
            break;
case IOMessage.TYPE_EVENT:
            try {
                JSONObject event = new JSONObject(message.getData());
                Object[] argsArray;
                if (event.has("args")) {
                    JSONArray args = event.getJSONArray("args");
                    argsArray = new Object[args.length()];
                    for (int i = 0; i < args.length(); i++) {
                        if (args.isNull(i) == false)
                            argsArray[i] = args.get(i);
                    }
                } else
                    argsArray = new Object[0];
                String eventName = event.getString("name");
                try {
                    findCallback(message).on(eventName,
                            remoteAcknowledge(message), argsArray);
                } **catch (Exception e) {
                    error(new SocketIOException(
                            "Exception was thrown in on(String, JSONObject[]).\n"
                                    + "Message was: " + message.toString(), e));**
                }

---

有人能帮我解决这个问题吗？为什么我会遇到这个异常？提前谢谢你，然后在方法上试试这个：

@Override
        public void on(String event, IOAcknowledge ack, Object... args) {
            Object[] a = args;

            Log.d("app", a[0].toString());
}           
    });

我首先将args对象解析为对象数组，然后调用0索引处的值

---

但这取决于服务器响应，您可以查看详细服务器响应的日志

我在堆栈跟踪中看到了这一点，这是预期的吗？[{“Action”：“AuthenticateUser”，“RequestStatus”：“100”，“RequestStatusMessage”：“无效用户名/密码”}]是的，这是我应该收到的消息it@RobertPeters我本应该收到一个JSONObject，但我不知道为什么会出现所有这些错误。抱歉，远程帮助不大。你看到这个线程了吗？也许，你得到了json，但是有一个解析问题。

public void on(String event, IOAcknowledge ack, Object... args) {
    for (SocketIO socket : sockets.values())
            socket.getCallback().on(event, ack, args);
    }

@Override
        public void on(String event, IOAcknowledge ack, Object... args) {
            Object[] a = args;

            Log.d("app", a[0].toString());
}           
    });