import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.ServerSocket;

import java.net.Socket;

public class MyServer implements Runnable{

    //服务器连接

    public static ServerSocket serverSocket;

    //连接

    public static Socket socket;

    //端口

    public static final int PORT = 8888;

    public void run() {

        DataInputStream dis = null;

        DataOutputStream dos = null;

        try {

            serverSocket = new ServerSocket(PORT);

            System.out.println("正在等待客户端连接...");

            //这里处于等待状态，如果没有客户端连接，程序不会向下执行

            while(true){

                socket = serverSocket.accept();

                dis = new DataInputStream(socket.getInputStream());

                dos = new DataOutputStream(socket.getOutputStream());

                //读取数据

                String clientStr = dis.readUTF();

                //写出数据

                dos.writeUTF(clientStr);

                System.out.println("----客户端已成功连接!----");

                //得到客户端的IP

                System.out.println("客户端的IP =" + socket.getInetAddress());

                //得到客户端的端口号

                System.out.println("客户端的端口号 =" + socket.getPort());

                //得到本地端口号

                System.out.println("本地服务器端口号=" + socket.getLocalPort());

                System.out.println("-----------------------");

                System.out.println("客户端：" + clientStr);

            }

        } catch (IOException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        } finally {//我们把流的关闭写在finally里，即使读写出现问题，我们也能正常的关闭流！

            try {

                if (dis != null)

                    dis.close();

                if (dos != null)

                    dos.close();

            } catch (IOException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

    public static void main(String[] args){

        Thread desktopServerThread = new Thread(new MyServer());

        desktopServerThread.start();

    }

}

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.himi" android:versionCode="1" android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".MainActivity" android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

    <uses-sdk android:minSdkVersion="4" />

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

</manifest> 

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="hello">这里输入文字发给服务器</string>

    <string name="app_name">SocketConnect</string>

    <string name="send">发送</string>

    <string name="get">这里显示服务器发来的信息!</string>

</resources>

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical" android:layout_width="fill_parent"

    android:layout_height="fill_parent">

    <TextView android:layout_width="fill_parent"

        android:layout_height="wrap_content" android:text="@string/hello" />

    <EditText android:id="@+id/edit" android:layout_width="fill_parent"

        android:layout_height="wrap_content" />

    <Button android:id="@+id/Btn_commit" android:layout_width="wrap_content"

        android:layout_height="wrap_content" android:text="@string/send" />

    <TextView android:layout_width="fill_parent" android:id="@+id/tv"

        android:layout_height="wrap_content" android:text="@string/get" />

</LinearLayout> 

package com.himi;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import java.net.Socket;

import android.app.Activity;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

/**

 * @author Himi

 */

public class MainActivity extends Activity implements OnClickListener {

    private Button btn_ok;

    private EditText edit;

    private TextView tv;

    //Socket用于连接服务器获取输入输出流

    private Socket socket;

    //服务器server/IP地址

    private final String ADDRESS = "10.203.8.167";

    //服务器端口

    private final int PORT = 8888;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

        this.requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.main);

        btn_ok = (Button) findViewById(R.id.Btn_commit);

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

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

        btn_ok.setOnClickListener(this);

    }

    public void onClick(View v) {

        if (v == btn_ok) {

            DataInputStream dis = null;

            DataOutputStream dos = null;

            try {

                //阻塞函数，正常连接后才会向下继续执行

                socket = new Socket(ADDRESS, PORT);

                //socket = new Socket("localhost", PORT);

                dis = new DataInputStream(socket.getInputStream());

                dos = new DataOutputStream(socket.getOutputStream());

                //向服务器写数据

                dos.writeUTF(edit.getText().toString());

                String temp = "I say:";

                temp += edit.getText().toString();

                temp += "\n";

                temp += "Server say:";

                //读取服务器发来的数据

                temp += dis.readUTF();

                tv.setText(temp);

            } catch (IOException e) {

                Log.e("Himi", "Stream error!");

                e.printStackTrace();

            } finally {

                try {

                    if (dis != null)

                        dis.close();

                    if (dos != null)

                        dos.close();

                } catch (IOException e) {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

                }

            }

        }

    }

}