package com.example.x_yp.socket;

import android.net.wifi.WifiInfo;

import android.net.wifi.WifiManager;

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.TextView;

import java.net.*;

import java.io.*;

public class MainActivity extends ActionBarActivity

{

    //定义侦听端口号

    final int SERVER_PORT = 30000;

    @Override

    protected void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //打印本机的IP地址

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

        myip.setText(getLocalIpAddress());

        //开一个新的线程来侦听客户端连接

       new Thread()

        {

            public void run()

            {

                startServer();

            }

        }.start();

    }

    // 得到本机WIFI下的ip地址

    private String getLocalIpAddress()

    {

        WifiManager wifiManager = (WifiManager) getSystemService(WIFI_SERVICE);

        WifiInfo wifiInfo = wifiManager.getConnectionInfo();

        // 获取32位整型IP地址

        int ipAddress = wifiInfo.getIpAddress();

        //返回整型地址转换成“*.*.*.*”地址

        return String.format("%d.%d.%d.%d",

                (ipAddress & 0xff), (ipAddress >> 8 & 0xff),

                (ipAddress >> 16 & 0xff), (ipAddress >> 24 & 0xff));

    }

    //进行socket连接通信

    private void startServer()

    {

        try

        {

            ServerSocket serverSocket = new ServerSocket(SERVER_PORT);

            //循环侦听客户端连接请求

            while (true)

            {

                Socket ss = serverSocket.accept();

                try

                {

                    // 将Socket对应的输出流包装成PrintStream

                    PrintStream ps = new PrintStream(ss.getOutputStream());

                    // 进行普通IO操作

                    ps.println("hello,you have recevied sever's messege");

                    // 关闭输出流，关闭Socket

                    ps.close();

                    ss.close();

                }

                catch (Exception e)

                {

                    e.printStackTrace();

                }

                finally

                {

                    ss.close();

                }

                Thread.sleep(3000);

            }

        }

        catch (Exception e)

        {

            e.printStackTrace();

        }

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.menu_main, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        //noinspection SimplifiableIfStatement

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

}

/**

PC端代码

PC作为客户端，根据服务器的IP地址和端口号连接服务器

*/

import java.net.*;

import java.io.*;

public class PC_Client

{

    public static void main(String[] args)

        throws IOException

    {

        //Socket socket = new Socket("192.168.47.1" , 30000);//这里的IP地址填写手机端服务器的IP地址

        Socket socket = new Socket("192.168.1.114" , 30000);//这里的IP地址填写手机端服务器的IP地址

        // 将Socket对应的输入流包装成BufferedReader

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

        // 进行普通IO操作

        String line = br.readLine();

        System.out.println("来自服务器的数据：" + line);

        // 关闭输入流、socket

        br.close();

        socket.close();

    }

}