套接字服务器/客户端有两个Android设备 [英] Socket Server/Client with two Android devices

问题描述

所以我有一个平板电脑，我想基本上是让一个TCP（或UDP）套接字服务器等等多部手机可以发送数据给它。我也希望能够发送响应回电话。我至今不工作是什么？

服务器：

  Log.i（服务器，启动服务器......）;
                尝试 {
                    ServerSocket的SS =新的ServerSocket（8080）;
                    Log.i（服务器，服务器状态+ ss.isBound（））;
                    而（真）{
                        //服务器等待客户这里，如果需要的话
                        插座S = ss.accept（）;
                        Log.i（服务器，服务器接受连接：+ s.isConnected（））;
                        BufferedReader中输入=新的BufferedReader（新的InputStreamReader（s.getInputStream（）））;
                        PrintWriter的输出=的新PrintWriter（s.getOutputStream（），TRUE）; //自动刷新
                        Log.i（服务器，初始化输入和输出）;
                        弦ST = input.readLine（）;
                        Log.i（服务器，从客户端：+ ST）;
                        output.println（再见，感谢所有的鱼:)）;
                    }

                }赶上（UnknownHostException异常E）{
                    // TODO自动生成的catch块
                    e.printStackTrace（）;
                }赶上（IOException异常E）{
                    // TODO自动生成的catch块
                    e.printStackTrace（）;
                }
 

和客户端（手机）：

 尝试{
                    插座S =新的Socket（192.168.0.106，8080）;

                    //输出流重定向到插座
                    的OutputStream出= s.getOutputStream（）;

                    PrintWriter的输出=的新PrintWriter（出）;
                    output.println（你好Android的！）;
                    BufferedReader中输入=新的BufferedReader（新的InputStreamReader（s.getInputStream（）））;
                    //读线（S）
                    弦ST = input.readLine（）;
                    tv.setText（ST）;
                    //关闭连接
                    S.CLOSE（）;


                }赶上（UnknownHostException异常E）{
                    // TODO自动生成的catch块
                    e.printStackTrace（）;
                }赶上（IOException异常E）{
                    // TODO自动生成的catch块
                    e.printStackTrace（）;
                }
 

解决方案

有可能是您的客户端不刷新的println

尝试要么在构造函数中指定自动冲洗

  PrintWriter的输出=的新PrintWriter（满分，真）;
 

或手动添加下面冲洗打印

  output.println（你好Android的！）;
output.flush（）;
 

So I have a tablet and I want to basically make it a TCP (or UDP) Socket Server so multiple phones can send data to it. I also want to be able to send responses back to the phones. What I have so far isn't working...

Server:

Log.i("Server", "Starting server...");
                try {
                    ServerSocket ss = new ServerSocket(8080);
                    Log.i("Server", "Server status: " + ss.isBound());
                    while(true){
                        //Server is waiting for client here, if needed
                        Socket s = ss.accept();
                        Log.i("Server", "Server is accepting connections: " + s.isConnected());
                        BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
                        PrintWriter output = new PrintWriter(s.getOutputStream(),true); //Autoflush
                        Log.i("Server", "Initialized input and output");
                        String st = input.readLine();
                        Log.i("Server", "From client: "+st);
                        output.println("Good bye and thanks for all the fish :)");
                    }

                } catch (UnknownHostException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

And client (phone):

try {
                    Socket s = new Socket("192.168.0.106", 8080);

                    //outgoing stream redirect to socket
                    OutputStream out = s.getOutputStream();

                    PrintWriter output = new PrintWriter(out);
                    output.println("Hello Android!");
                    BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
                    //read line(s)
                    String st = input.readLine();
                    tv.setText(st);
                    //Close connection
                    s.close();


                } catch (UnknownHostException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

解决方案

It is likely that your client is not flushing the println

Try either specifying autoflush in your constructor

PrintWriter output = new PrintWriter(out, true);

or manually adding a flush below your print

output.println("Hello Android!");
output.flush();

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