在signalR集成中抛出与服务器协商的例外

Question

我在android端进行了Signal R集成，并完成了所有必要的步骤。并配置了服务器端代码。将服务器URL更改为我的localhost并运行应用程序，但它会抛出异常。

java.util.concurrent.ExecutionException: microsoft.aspnet.signalr.client.transport.NegotiationException: There was a problem in the negotiation with the server。

以下是我的android端代码。请给我一个适当的指导。

*注意：我也根据服务器端配置更改了集线器名称。

public class SignalRService extends Service {

private microsoft.aspnet.signalr.client.hubs.HubConnection mHubConnection;
private microsoft.aspnet.signalr.client.hubs.HubProxy mHubProxy;
private Handler mHandler; // to display Toast message
private final IBinder mBinder = new LocalBinder(); // Binder given to clients

public static final String BROADCAST_ACTION = "com.android.com.simplechatwithsignalr";

public SignalRService() {
}

@Override
public void onCreate() {
    super.onCreate();
    mHandler = new Handler(Looper.getMainLooper());


}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    int result = super.onStartCommand(intent, flags, startId);
    startSignalR();
    return result;
}

@Override
public void onDestroy() {
    mHubConnection.stop();
    super.onDestroy();
}

@Override
public IBinder onBind(Intent intent) {
    // Return the communication channel to the service.
    startSignalR();
    return mBinder;
}

/**
 * Class used for the client Binder.  Because we know this service always
 * runs in the same process as its clients, we don't need to deal with IPC.
 */
public class LocalBinder extends Binder {
    public SignalRService getService() {
        // Return this instance of SignalRService so clients can call public methods
        return SignalRService.this;
    }
}

/**
 * method for clients (activities)
 */
public void sendMessage(String message) {
    String SERVER_METHOD_SEND = "Send";
    mHubProxy.invoke(SERVER_METHOD_SEND, "test" ,
            message);
}
private void startSignalR() {
    Platform.loadPlatformComponent(new AndroidPlatformComponent());

 //   String serverUrl = "http://192.168.0.104/";
    String serverUrl = "http://10.1.81.65:5565/";
    mHubConnection = new microsoft.aspnet.signalr.client.hubs.HubConnection(serverUrl);
    String SERVER_HUB_CHAT = "Chat";
    mHubProxy = mHubConnection.createHubProxy(SERVER_HUB_CHAT);
    ClientTransport clientTransport = new ServerSentEventsTransport(mHubConnection.getLogger());
    SignalRFuture<Void> signalRFuture = mHubConnection.start(clientTransport);

    try {
        signalRFuture.get();

    } catch (InterruptedException | ExecutionException e) {
        Log.e("SimpleSignalR", e.toString());

        return;
    }

    mHubProxy.on("Send", new SubscriptionHandler1<String>() {
        @Override
        public void run(String msg) {
            Log.e("onMessageReceived ", msg);
            Intent intent = new Intent(BROADCAST_ACTION);
            intent.putExtra("message", msg);
            sendBroadcast(intent);
        }
    }, String.class);

    mHubConnection.received(new MessageReceivedHandler() {

        @Override
        public void onMessageReceived(final JsonElement json) {
            Log.e("onMessageReceived ", json.toString());
         /*   mHandler.post(new Runnable() {
                @Override
                public void run() {
                    Log.e("checkMessage" , "===-?" + json);
                }
            });*/
        }
    });
  }


}