与Socket和RxJava聊天

Question

我正在创建此聊天应用程序，用户可以在同一WiFi上进行联系时进行通话。他们使用Network Service Discovery检测对方（它的工作非常糟糕，有时他们并没有找到对方）。一旦他们在网络上看到对方，他们就可以开始对话了。我创建了这个类：

码

public class ChatConnection {

     private ServerSocket serverSocket;
     private Socket socket;
     private InputStream inputStream;
     private OutputStream outputStream;
     private DataInputStream dataInputStream;
     private DataOutputStream dataOutputStream;
     private String message = "";

    private Thread serverThread;

    @Inject
    public ChatConnection() {
        serverThread = new Thread(new ServerThread());
        serverThread.start();
    }

    public Observable<Boolean> connectToServer(InetAddress host, int port)    
    {
        return Observable.unsafeCreate(new Observable.OnSubscribe<Boolean>() {
            @Override
            public void call(Subscriber<? super Boolean> subscriber) {
                 try {
                    if (socket != null) {
                        if (socket.isConnected()) {
                            socket.close();
                        }
                        socket = new Socket(host, port);
                    } else
                        socket = new Socket(host, port);                 

                    subscriber.onNext(socket.isConnected());
                } catch (IOException e) {
                     subscriber.onError(e);                    
                }
            }
        });
    }

    public Observable<String> observeServer() {        
         return Observable.unsafeCreate(new Observable.OnSubscribe<String>() {
            @Override
            public void call(Subscriber<? super String> subscriber) {
                try {
                    while (!message.equals("##exit##")) {
                        message = dataInputStream.readUTF();
                        subscriber.onNext(message);
                    }
                } catch (IOException e) {
                    subscriber.onError(e);
                }
        });
    }

    public Observable<Boolean> sendMessage(String message) {
        return Observable.unsafeCreate(new Observable.OnSubscribe<Boolean>() {
            @Override
            public void call(Subscriber<? super Boolean> subscriber) {
                try {
                    dataOutputStream.writeUTF(message);
                    subscriber.onNext(true);
                } catch (IOException e) {
                    subscriber.onError(e);
                }
            }
        });
    }

    public int getLocalPort() {
        return serverSocket.getLocalPort();
    }

    public void tearDown() {
        try {
            socket.close();
            serverSocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    class ServerThread implements Runnable {
        @Override
        public void run() {
            try {
                serverSocket = new ServerSocket(0);
                socket = serverSocket.accept();
                inputStream = socket.getInputStream();
                outputStream = socket.getOutputStream();
                dataInputStream = new DataInputStream(inputStream);
                dataOutputStream = new DataOutputStream(outputStream);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }    
}

问题是 observeServer（）没有做任何事情，甚至设置内部的Log.d（...）也从未显示任何内容。我对java sockets非常陌生。我想有人告诉我我做错了什么。谢谢。