package com.sec.chatroomandroid;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.net.Socket;  

import android.app.Activity;

import android.os.Bundle;

import android.os.StrictMode;

import android.util.Log;

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

{

    private final String        DEBUG_TAG   = "Activity01";  

    private TextView    mTextView = null;

    private EditText    mEditText = null;

    private Button      mButton = null;

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder().detectDiskReads().detectDiskWrites().detectNetwork().penaltyLog().build());

        StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectLeakedSqlLiteObjects().detectLeakedClosableObjects().penaltyLog().penaltyDeath().build());

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);  

        mButton = (Button)findViewById(R.id.Button01);

        mTextView = (TextView)findViewById(R.id.TextView01);

        mEditText = (EditText)findViewById(R.id.EditText01);  

        //登陆

        mButton.setOnClickListener(new OnClickListener()

        {

            public void onClick(View v)

            {

                Socket socket = null;

                String message = mEditText.getText().toString() + "\r\n";

                try

                {

                    //创建Socket

                    socket = new Socket("172.16.29.201",5000);

                    //向服务器发送消息

                    PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);

                    out.println(message);   

                    //接收来自服务器的消息

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

                    String msg = br.readLine();   

                    if ( msg != null )

                    {

                        mTextView.setText(msg);

                    }

                    else

                    {

                        mTextView.setText("数据错误!");

                    }

                    //关闭流

                    out.close();

                    br.close();

                    //关闭Socket

                    socket.close();

                }

                catch (Exception e)

                {

                    // TODO: handle exception

                    Log.e(DEBUG_TAG, e.toString());

                }

            }

        });

    }

} 

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

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

    package="com.sec.chatroomandroid"

    android:versionCode="1"

    android:versionName="1.0" >

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

    <uses-sdk

        android:minSdkVersion="14"

        android:targetSdkVersion="21" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <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>

</manifest>

<?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:id="@+id/TextView01"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/Message_Recv"

    />

    <EditText

    android:id="@+id/EditText01"

    android:hint="@string/Message_Send"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content">

    </EditText>

    <Button

    android:id="@+id/Button01"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/Send"

    />

</LinearLayout>

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

<resources>

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

    <string name="Message_Recv">这里显示接收到服务器发来的信息</string>

    <string name="Message_Send">输入要发送的内容</string>

    <string name="Send">发送</string>

</resources>

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.InputStreamReader;

import java.io.OutputStreamWriter;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;  

public class ChatServer implements Runnable

{

    public void run()

    {

        try

        {

            //创建ServerSocket

            ServerSocket serverSocket = new ServerSocket(5000,10);

            while (true)

            {

                //接受客户端请求

                Socket client = serverSocket.accept();

                System.out.println("accept");

                try

                {

                    //接收客户端消息

                    BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));

                    String str = in.readLine();

                    System.out.println("read: " + str);

                    //向客户端发送消息

                    PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(client.getOutputStream())),true);

                    out.println("server message");

                    //关闭流

                    out.close();

                    in.close();

                }

                catch (Exception e)

                {

                    System.out.println(e.getMessage());

                    e.printStackTrace();

                }

                finally

                {

                    //关闭

                    client.close();

                    System.out.println("close");

                }

                serverSocket.close();

            }

        }

        catch (Exception e)

        {

            System.out.println(e.getMessage());

        }

    }

    //main函数，开启服务器

    public static void main(String a[])

    {

        Thread desktopServerThread = new Thread(new ChatServer());

        desktopServerThread.start();

    }

}