Android手机通过socket与pc通信

原文：http://blog.csdn.net/tobacco5648/article/details/7742295

在Android中可以直接利用java中的Socket与ServerSocket构建socket通信。

    代码的运行环境：

    pc端：普通pc，作为服务器，已经设置有域名（通过动态域名软件设置），在5648端口进行监听。

    Android手机客户端：android2.3设备。

    代码运行一切正常，客户端发送的文字将在服务器端接收并显示，服务器每接收到客户端的一行文字，就会返回一个从0开始递增的整数，此整数将在客户端显示出来。

    pc端代码：

    

 package test;

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.net.ServerSocket;
 import java.net.Socket;


 public class Test implements Runnable{

     /**
      * @param args
      */

     int max=10;      //最大开启线程数
     int i=0;         //回复数字
     int temp;
     ServerSocket serverSocket;
     Socket socket[];

     public Test(){

         try {
             serverSocket=new ServerSocket(5648);    //在5648端口进行侦听
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
             System.out.println("can't initate ServerSocket!");
             return;
         }

         socket=new Socket[max];

         System.out.println("waiting for connect");
         try {
             while((socket[i]=serverSocket.accept())!=null){
                 temp=i;
                 i++;
                 new Thread(this).start();           //每侦听到一个客户端的连接，就会开启一个工作线程

             }
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
     public static void main(String[] args) {
         new Test();

     }

     @Override
     public void run() {
         Socket sk=socket[temp];
         System.out.println("accept:"+sk.getInetAddress().getHostAddress());
         InputStream is=null;
         OutputStream os=null;
         BufferedReader br=null;
         PrintWriter pw=null;
         try {
             is=sk.getInputStream();
             os=sk.getOutputStream();
             br=new BufferedReader(new InputStreamReader(is));
             pw=new PrintWriter(os);
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
             try {
                 sk.close();
             } catch (IOException e1) {
                 // TODO Auto-generated catch block
                 e1.printStackTrace();
             }
             return;
         }
         String str;
         try {
             int m=0;
             while((str=br.readLine())!=null){
                 System.out.println(str);
                 pw.println(m);
                 pw.flush();
                 m++;
             }
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

     }

 }

    android设备客户端代码：

    MainActivity.java代码：

    

 package com.tobacco.phonetest;

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.net.Socket;
 import java.net.UnknownHostException;

 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Handler;
 import android.util.Log;
 import android.view.Menu;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.Toast;

 public class MainActivity extends Activity implements OnClickListener,Runnable{

     private Button button;
     private EditText editText;
     private Socket socket;
     private PrintWriter pw;
     private BufferedReader br;
     private Handler handler;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         handler=new Handler();
         button=(Button)findViewById(R.id.button);
         button.setOnClickListener(this);
         editText=(EditText)findViewById(R.id.edittext);
         try {
             socket=new Socket("tobacco5648.xicp.net",5648);        //连接到tobacco5648.xicp.net的5648端口

 <span style="white-space:pre">                                      </span>//tobacco5648.xicp.net是我申请的域名

         } catch (UnknownHostException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
             Log.e("socket","unknown host");
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
             Log.e("socket","io execption");
         }
         if(socket==null){
             Log.e("socket","null");
         }
         else
             try {
             pw=new PrintWriter(socket.getOutputStream());
             br=new BufferedReader(new InputStreamReader(socket.getInputStream()));
             if(pw!=null&&br!=null){
                 new Thread(this).start();
             }
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }

     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.activity_main, menu);
         return true;
     }

     public void onClick(View view) {
         if(view==button){
             String str;
             str=editText.getText().toString();
             pw.println(str);
             pw.flush();
         }

     }

     public void run() {

         try {
             String str;
             while((str=br.readLine())!=null){
                 final String s=str;
                 handler.post(new Runnable(){

                     public void run() {
                         Toast.makeText(MainActivity.this, s, Toast.LENGTH_LONG).show();

                     }});

             }
         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

     }


 }

 

    activity_main.xml代码：

    

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical" >

     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="@string/hello_world" />

     <EditText
         android:id="@+id/edittext"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:hint="@string/message" />

     <Button
         android:id="@+id/button"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:text="@string/hello_world" />

 </LinearLayout>

    因为此客户端程序要用到网络，所以要在manifest文件中添加权限。

    Manifest.xml代码：

    

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.tobacco.phonetest"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk
         android:minSdkVersion="8"
         android:targetSdkVersion="15" />
     <uses-permission android:name="android.permission.INTERNET"></uses-permission>

     <application
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
         <activity
             android:name=".MainActivity"
             android:label="@string/title_activity_main" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
     </application>

 </manifest>