Anroid中两台手机连接同一wifi通过socket进行通信

import android.view.Menu;

import android.widget.TextView;

public class MainActivity extends Activity {

public static ServerSocket serverSocket = null;

public static TextView mTextView, textView1;

private String IP = "";

String buffer = "";

public static Handler mHandler = new Handler() {

	@Override

	public void handleMessage(android.os.Message msg) {

		if (msg.what==0x11) {

			Bundle bundle = msg.getData();

			mTextView.append("client"+bundle.getString("msg")+"\n");

		}

	};

};



@Override

protected void onCreate(Bundle savedInstanceState) {

	super.onCreate(savedInstanceState);

	setContentView(R.layout.activity_main);

	mTextView = (TextView) findViewById(R.id.textsss);

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

	IP = getlocalip();

	textView1.setText("IP addresss:"+IP);

	new Thread() {

		public void run() {

			Bundle bundle = new Bundle();

			bundle.clear();

			OutputStream output;

			String str = "hello hehe";

			try {

				serverSocket = new ServerSocket(30000);

				while (true) {

					Message msg = new Message();

					msg.what = 0x11;

					try {

						Socket socket = serverSocket.accept();

						output = socket.getOutputStream();

						output.write(str.getBytes("gbk"));

						output.flush();

						socket.shutdownOutput();

						BufferedReader bff = new BufferedReader(new InputStreamReader(socket.getInputStream()));

						String line = null;

						buffer = "";

						while ((line = bff.readLine())!=null) {

							buffer = line + buffer;

						}

						bundle.putString("msg", buffer.toString());

						msg.setData(bundle);

						mHandler.sendMessage(msg);

						bff.close();

						output.close();

						socket.close();

					} catch (IOException e) {

						e.printStackTrace();

					}

				}

			} catch (IOException e1) {

				// TODO Auto-generated catch block

				e1.printStackTrace();

			}

		};

	}.start();

}

/**

* 或取本机的ip地址

*/

private String getlocalip(){  

       WifiManager wifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE);    

        WifiInfo wifiInfo = wifiManager.getConnectionInfo();    

        int ipAddress = wifiInfo.getIpAddress();   

      //  Log.d(Tag, "int ip "+ipAddress);  

        if(ipAddress==0)return null;  

        return ((ipAddress & 0xff)+"."+(ipAddress>>8 & 0xff)+"."  

               +(ipAddress>>16 & 0xff)+"."+(ipAddress>>24 & 0xff));  

    } 

}

  



二、 Android局域网通信之客户端代码

package com.example.client;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.OutputStream;

import java.net.InetSocketAddress;

import java.net.Socket;

import java.net.SocketTimeoutException;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

public class MainActivity extends Activity {

Socket socket = null;

String buffer = "";

TextView txt1;

Button send;

EditText ed1;

String geted1;

public Handler myHandler = new Handler() {

	@Override

	public void handleMessage(Message msg) {

		if (msg.what == 0x11) {

			Bundle bundle = msg.getData();

			txt1.append("server:"+bundle.getString("msg")+"\n");

		}

	}



};



@Override

protected void onCreate(Bundle savedInstanceState) {

	super.onCreate(savedInstanceState);

	setContentView(R.layout.activity_main);

	txt1 = (TextView) findViewById(R.id.txt1);

	send = (Button) findViewById(R.id.send);

	ed1 = (EditText) findViewById(R.id.ed1);

	send.setOnClickListener(new OnClickListener() {



		@Override

		public void onClick(View v) {

			geted1 = ed1.getText().toString();

			txt1.append("client:"+geted1+"\n");

			//启动线程 向服务器发送和接收信息

			new MyThread(geted1).start();

		}

	});



}



class MyThread extends Thread {



	public String txt1;



	public MyThread(String str) {

		txt1 = str;

	}



	@Override

	public void run() {

		//定义消息

		Message msg = new Message();

		msg.what = 0x11;

		Bundle bundle = new Bundle();

		bundle.clear();

		try {

			//连接服务器 并设置连接超时为1秒

			socket = new Socket();

			socket.connect(new InetSocketAddress("192.168.1.104", 30000), 1000); //端口号为30000

			//获取输入输出流

			OutputStream ou = socket.getOutputStream();

			BufferedReader bff = new BufferedReader(new InputStreamReader(

					socket.getInputStream()));

			//读取发来服务器信息

			String line = null;

			buffer="";

			while ((line = bff.readLine()) != null) {

				buffer = line + buffer;

			}

			

			//向服务器发送信息

			ou.write(txt1.getBytes("gbk"));

			ou.flush();

			bundle.putString("msg", buffer.toString());

			msg.setData(bundle);

			//发送消息 修改UI线程中的组件

			myHandler.sendMessage(msg);

			//关闭各种输入输出流

			bff.close();

			ou.close();

			socket.close();

		} catch (SocketTimeoutException aa) {

			//连接超时 在UI界面显示消息