使用套接字通过 Wi-fi 连接两个设备

Question

我为服务器和客户端套接字编写了代码。 我已经使用处理程序使用线程。但它经常给出异常 只有创建视图层次结构的原始线程才能触及它的视图 如何管理这个？

这是服务器套接字的代码

 public class ServerThread implements Runnable {

    public void run() { 
        try {
            Looper.prepare();
            if (SERVERIP != null) {
                handler.post(new Runnable() {
                    public void run() {
                        serverStatus.setText("Listening on IP: " + SERVERIP);
                    }
                });
                serverSocket = new ServerSocket(SERVERPORT);
                Toast.makeText(getApplicationContext(), serverSocket.getLocalSocketAddress().toString()
                , Toast.LENGTH_LONG).show();
                serverStatus.append("\n"+serverSocket.getLocalSocketAddress().toString());
                while (true) {
                    // listen for incoming clients
                    Socket client = serverSocket.accept();

                            serverStatus.setText("Connected.");


                    try {
                        BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));
                        String line = null;
                        while ((line = in.readLine()) != null) {
                            Log.d("ServerActivity", line);
                            handler.post(new Runnable() {
                                public void run() {

                                }
                            }); 
                        }
                        break;
                    } catch (Exception e) {
                        handler.post(new Runnable() {
                            public void run() {
                                serverStatus.setText("Oops. Connection interrupted. Please reconnect your phones.");
                            }
                        });
                        e.printStackTrace();
                    }
                }
            } else {
                handler.post(new Runnable() {
                    public void run() {
                        serverStatus.setText("Couldn't detect internet connection.");
                    }
                });
            }
        } catch (final Exception e) {
            handler.post(new Runnable() {
                public void run() {
                    serverStatus.setText("Error"+e.getMessage());

                }
            });
            e.printStackTrace();
        }
    }
}

客户端套接字代码

  public class ClientThread implements Runnable {

    public void run() {
        try {
            InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
            Log.d("ClientActivity", "C: Connecting...");
            Socket socket = new Socket(serverAddr, 8080);
            connected = true;

                try {
                    console.append("\nC: Sending command.");
                    PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket
                                .getOutputStream())), true);
                        // where you issue the commands
                        out.println("Hey Server!");
                        console.append("C: Sent.");
                } catch (Exception e) {
                    console.append("S: Error= "+ e.getMessage());
                }

            socket.close();
            console.append("\nC: Closed.");
        } catch (Exception e) {
            Log.e("Client :", e.getMessage());

            //console.append("\nC: Error= ");
            connected = false;
        }
    }
}

这里的控制台是我试图放置一些消息的文本视图。 我可以在日志中看到消息，但在文本视图中看不到

Answer 1

只有创建视图层次结构的原始线程才能触摸它的视图如何管理？

使用runOnUiThread()。或者，使用Handler。或者，使用post()。