如何在真正的Android设备上运行TCP连接？

Question

我正在关注this tutorial创建一个包含服务器 - 客户端聊天的应用。它就像在那里描述的android模拟器中的魅力一样工作。但我想在我的设备上模拟它。真实设备中的端口转发怎么样？

我尝试在一个热点连接我的两个设备并发送消息。但它没有用。我需要更改一些代码吗？或者还有其他方法吗？

任何帮助将不胜感激！

我是网络和Android的新手。

服务器代码：

import android.os.Bundle;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.ServerSocket;
import java.net.Socket;

import android.app.Activity;
import android.os.Handler;
import android.widget.TextView;

public class MainActivity extends Activity {

private ServerSocket serverSocket;

Handler updateConversationHandler;

Thread serverThread = null;

private TextView text;

public static final int SERVERPORT = 6000;

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    text = (TextView) findViewById(R.id.text2);

    updateConversationHandler = new Handler();

    this.serverThread = new Thread(new ServerThread());
    this.serverThread.start();

}

@Override
protected void onStop() {
    super.onStop();
    try {
        serverSocket.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

class ServerThread implements Runnable {

    public void run() {
        Socket socket = null;
        try {
            serverSocket = new ServerSocket(SERVERPORT);
        } catch (IOException e) {
            e.printStackTrace();
        }
        while (!Thread.currentThread().isInterrupted()) {

            try {

                socket = serverSocket.accept();

                CommunicationThread commThread = new CommunicationThread(socket);
                new Thread(commThread).start();

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

class CommunicationThread implements Runnable {

    private Socket clientSocket;

    private BufferedReader input;

    public CommunicationThread(Socket clientSocket) {

        this.clientSocket = clientSocket;

        try {

            this.input = new BufferedReader(new InputStreamReader(this.clientSocket.getInputStream()));

        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void run() {

        while (!Thread.currentThread().isInterrupted()) {

            try {

                String read = input.readLine();

                updateConversationHandler.post(new updateUIThread(read));

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}

class updateUIThread implements Runnable {
    private String msg;

    public updateUIThread(String str) {
        this.msg = str;
    }

    @Override
    public void run() {
        text.setText(text.getText().toString()+"Client Says: "+ msg + "\n");
    }
}
}

客户代码：

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends Activity {

private Socket socket;

private static final int SERVERPORT = 5000;
private static final String SERVER_IP = "10.0.2.2";

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

    new Thread(new ClientThread()).start();
}

public void onClick(View view) {
    try {
        EditText et = (EditText) findViewById(R.id.EditText01);
        String str = et.getText().toString();
        PrintWriter out = new PrintWriter(new BufferedWriter(
                new OutputStreamWriter(socket.getOutputStream())),
                true);
        out.println(str);
    } catch (UnknownHostException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

class ClientThread implements Runnable {

    @Override
    public void run() {

        try {
            InetAddress serverAddr = InetAddress.getByName(SERVER_IP);

            socket = new Socket(serverAddr, SERVERPORT);

        } catch (UnknownHostException e1) {
            e1.printStackTrace();
        } catch (IOException e1) {
            e1.printStackTrace();
        }

    }

}

}