java服务器端与android客户端的通信

服务器端的工作非常简单，建立socket.监听，代码如下：

package com.hdc.socket;

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

public class JavaServer {
	public static void main(String[] args) {
		try {
			ServerSocket server = new ServerSocket(8888);
			while (true) {  
				System.out.println("execute 1\n");  
				Socket client = server.accept();  
				System.out.println("execute 2\n");  
				OutputStream out = client.getOutputStream();  
				System.out.println("execute 3\n");  
				String msg = "hello android";  
				out.write(msg.getBytes());  
				System.out.println("execute 4\n");
				client.close();  
			 }  

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

	}

}

　　端口号：8888，等待客户端连接！

然后看android客户端的编码：

因为操作线程不能在主线程，故：

package com.hdc.sockettestclient;

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

public class MainActivity extends Activity {
    private TextView myTextView;

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

        myTextView = (TextView) findViewById(R.id.textView1);

        new YunTheard(myTextView).start();

    }
}

 

package com.hdc.sockettestclient;

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

import android.widget.TextView;

public class YunTheard extends Thread {
	private TextView myTextView;

	public YunTheard(TextView myTextView) {
		super();
		this.myTextView = myTextView;
	}

	@Override
	public void run() {

		try {
			myTextView.setText("0");
			Socket socket = new Socket("172.17.1.41", 8888);
			myTextView.setText("1");
			InputStream in = socket.getInputStream();
			byte[] buffer = new byte[in.available()];
			myTextView.setText("2");
			in.read(buffer);
			myTextView.setText("3");
			String msg = new String(buffer);
			myTextView.setText(msg);

		} catch (UnknownHostException e) {

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

			e.printStackTrace();
		}
	}
}

　　通信成功后客户端会显示来自服务端的hello，android