AndroidTCP详细demo

这里是一个简单的 Android TCP 客户端和服务器的详细 demo。

1. 创建一个新的 Android 项目，并在 AndroidManifest.xml 文件中添加以下权限：

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

2. 在 MainActivity.java 文件中创建两个类：ServerThread 和 ClientThread，分别用于启动 TCP 服务器和客户端。

public class ServerThread extends Thread {
    private ServerSocket serverSocket;

    @Override
    public void run() {
        try {
            serverSocket = new ServerSocket(8888);
            while (true) {
                Socket socket = serverSocket.accept();
                BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
                String message = in.readLine();
                Log.d("ServerThread", "Received message: " + message);
                in.close();
                socket.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

public class ClientThread extends Thread {
    private String ip;
    private int port;
    private String message;

    public ClientThread(String ip, int port, String message) {
        this.ip = ip;
        this.port = port;
        this.message = message;
    }

    @Override
    public void run() {
        try {
            Socket socket = new Socket(ip, port);
            PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
            out.println(message);
            out.flush();
            out.close();
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

3. 在 MainActivity 的 onCreate() 方法中启动 TCP 服务器和客户端：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Start server thread
    ServerThread serverThread = new ServerThread();
    serverThread.start();

    // Start client thread
    ClientThread clientThread = new ClientThread("localhost", 8888, "Hello, server!");
    clientThread.start();
}

4. 运行应用程序，并在 Logcat 中查看输出：

D/ServerThread: Received message: Hello, server!

这就是一个简单的 Android TCP 客户端和服务器的详细 demo。你可以根据自己的需要进行修改和扩展。