写一个安卓10的java层阻塞socket通信服务端和客户端

好的，以下是一个简单的安卓10的Java层阻塞socket通信服务端和客户端的实现代码：

服务端代码：

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket = new ServerSocket(12345); // 监听端口号为12345
            System.out.println("Server started, listening on port 12345...");

            while (true) {
                Socket socket = serverSocket.accept(); // 阻塞等待客户端连接
                System.out.println("Client connected: " + socket.getRemoteSocketAddress());

                InputStream inputStream = socket.getInputStream();
                OutputStream outputStream = socket.getOutputStream();

                byte[] buffer = new byte[1024];
                int len;

                while ((len = inputStream.read(buffer)) != -1) { // 阻塞等待客户端数据
                    String msg = new String(buffer, 0, len);
                    System.out.println("Received from client: " + msg);

                    outputStream.write(("Server received: " + msg).getBytes()); // 发送数据给客户端
                    outputStream.flush();
                }

                socket.close(); // 关闭连接
                System.out.println("Client disconnected: " + socket.getRemoteSocketAddress());
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

客户端代码：

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;

public class Client {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost", 12345); // 连接到本地的12345端口
            System.out.println("Connected to server: " + socket.getRemoteSocketAddress());

            InputStream inputStream = socket.getInputStream();
            OutputStream outputStream = socket.getOutputStream();

            String msg = "Hello, server!";
            outputStream.write(msg.getBytes()); // 发送数据给服务端
            outputStream.flush();

            byte[] buffer = new byte[1024];
            int len = inputStream.read(buffer); // 阻塞等待服务端数据
            String responseMsg = new String(buffer, 0, len);
            System.out.println("Received from server: " + responseMsg);

            socket.close(); // 关闭连接
            System.out.println("Disconnected from server.");
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这里实现的是简单的“Hello world”级别的通信，你可以根据实际需求进行修改和扩展。