android socket wifi 连接PC实现简单的PPT控制器（源码）

通过本文只是想来简单介绍一下关于android socket编程。

向上服务器端代码：

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package nate.PPT.control; import java.awt.AWTException; import java.awt.Robot; import java.awt.event.KeyEvent; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.net.ServerSocket; import java.net.Socket;       public class PPTServer {     private final static int RIGHT = 1;     private final static int LEFT = 2;     private final static int SHIFTF5 = 0;     private final static int ESC = 3;           private static int key;     //注意这里用的输入输出流的对象     private static ObjectInputStream fromClient;     private static ObjectOutputStream fromServer;           public static void main(String[] args) throws IOException,                                     ClassNotFoundException, AWTException, InterruptedException{         ServerSocket sSocket = new ServerSocket(2011);         System.out.println("waiting a connection from the client");         Robot robot = new Robot();              Socket sock = sSocket.accept();         System.out.println("recv a connection");         fromClient = new ObjectInputStream(sock.getInputStream());         fromServer = new ObjectOutputStream(sock.getOutputStream());         do{             Choices choice = (Choices)fromClient.readObject();             System.out.println("the flag is " + choice.getKey());             key = choice.getKey();             switch(key){                           case SHIFTF5:                 robot.keyPress(KeyEvent.VK_SHIFT);                 Thread.sleep(20);                 robot.keyPress(KeyEvent.VK_F5);                 Thread.sleep(10);                 robot.keyRelease(KeyEvent.VK_F5);                 robot.keyRelease(KeyEvent.VK_SHIFT);                 Thread.sleep(10);                 break;                               case LEFT:                 robot.keyPress(KeyEvent.VK_LEFT);                 Thread.sleep(10);                 robot.keyRelease(KeyEvent.VK_LEFT);                 Thread.sleep(10);                 break;                               case RIGHT:                 robot.keyPress(KeyEvent.VK_RIGHT);                 Thread.sleep(10);                 robot.keyRelease(KeyEvent.VK_RIGHT);                 Thread.sleep(10);                 break;                               case ESC:                 robot.keyPress(KeyEvent.VK_ESCAPE);                 Thread.sleep(10);                 robot.keyPress(KeyEvent.VK_ESCAPE);                 Thread.sleep(10);                 break;                                   default:                     break;             }         }while(key != -1);         System.out.println("exit the app");         fromClient.close();         fromServer.close();         sock.close();         sSocket.close();     } }

本 例中，注意一下所用的输入输出流对象，关于这个java中已经很清楚了，就不多说。同时，本例中使用java中的Robot来模拟按键，即PPT中的快捷 键从而实现控制PPT的目的。当然，大家都知道，使用ObjectInputStream、ObjectOutputStream传输对象首先还需下面的 条件。即传送的对象所属的类，该类必须实现Serializable接口！同时注意在android手机客户端，我们需要同样拥有这样一个类型！！！将此 类copy过去即可，这些都是java中的知识。

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上面类包含了传输的信息数据内容。

来看看client端的代码，部署在android手机端：

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package nate.PPT.control;   import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.net.InetAddress; import java.net.Socket; import java.net.UnknownHostException; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.view.KeyEvent; import android.view.View; import android.widget.Button;   public class PPTClient extends Activity {     private Button start;     private Button escape;     private Button forward;     private Button back;     private Socket sock;     private ObjectOutputStream fromClient;     private ObjectInputStream fromServer;     private final static int RIGHT = 1;     private final static int LEFT = 2;     private final static int SHIFTF5 = 0;     private final static int ESC = 3;           /** Called when the activity is first created. */     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);                   try {             //sock = new Socket(InetAddress.getByName("125.71.69.199"),2011);             sock = new Socket(InetAddress.getByName("125.70.223.165"),2011);             fromClient = new ObjectOutputStream(sock.getOutputStream());             fromServer = new ObjectInputStream(sock.getInputStream());                           } catch (UnknownHostException e1) {             e1.printStackTrace();         } catch (IOException e1) {             e1.printStackTrace();         }                   start = (Button)this.findViewById(R.id.start);         escape = (Button)this.findViewById(R.id.escape);         forward = (Button)this.findViewById(R.id.froward);         back = (Button)this.findViewById(R.id.back);                   start.setOnClickListener(new Button.OnClickListener(){               @Override             public void onClick(View v) {                 Choices choice = new Choices(SHIFTF5);                 try {                     fromClient.writeObject(choice);                     System.out.println("send the start shift + f5");                 } catch (IOException e) {                     e.printStackTrace();                 }             }                       });                   escape.setOnClickListener(new Button.OnClickListener(){               @Override             public void onClick(View arg0) {                 Choices  choice = new Choices(ESC);                 try {                     fromClient.writeObject(choice);                     System.out.println("send the escape");                 } catch (IOException e) {                     e.printStackTrace();                 }             }         });         forward.setOnClickListener(new Button.OnClickListener(){               @Override             public void onClick(View v) {                 Choices choice = new Choices(RIGHT);                 try {                     fromClient.writeObject(choice);                     System.out.println("send the right (the next)");                 } catch (IOException e) {                     e.printStackTrace();                 }                               }                       });         back.setOnClickListener(new Button.OnClickListener(){               @Override             public void onClick(View v) {                 Choices choice = new Choices(LEFT);                 try {                     fromClient.writeObject(choice);                     System.out.println("send the left (the last)");                 } catch (IOException e) {                     e.printStackTrace();                 }             }         });     }           /**      * 监听BACK键      * @param keyCode      * @param event      * @return      */     public boolean onKeyDown(int keyCode, KeyEvent event)     {           if ( event.getKeyCode() == KeyEvent.KEYCODE_BACK){             AlertDialog.Builder builder = new AlertDialog.Builder(this);             builder.setTitle("exit app");             builder.setMessage("You will exit the app...");             //builder.setIcon(R.drawable.stat_sys_warning);             builder.setPositiveButton("OK",new DialogInterface.OnClickListener() {                 @Override                 public void onClick(DialogInterface dialog, int which) {                     Intent startMain = new Intent(Intent.ACTION_MAIN);                     startMain.addCategory(Intent.CATEGORY_HOME);                     startMain.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);                     startActivity(startMain);                     System.exit(0);                 }             });             builder.setNegativeButton("Cancel",new DialogInterface.OnClickListener() {                                   @Override                 public void onClick(DialogInterface dialog, int which) {                                       }             });             builder.show();         }         return super.onKeyDown(keyCode, event);     } }

 

代码还是很简单的，这里不多说了，强调一下的是，client端除了一个activity的类外，还有上面的Choices类！！！与服务器端的类型一模一样！同时，别忘记了需要在android manifest.XML文件中添加

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用户权限！！！别忘记添加。。。
当然，代码还有很多需要改进的地方，比如要解决按下可能延迟PPT没有 反应，但是又不知道是否真的按下等问题，我们可以在手机端的按钮上加上一个震动的效果，这样我们就能准确的知道我们是否按下手机上的按键。这个应该不难 吧！不过本篇文章主要还是简单介绍android socket编程与PC的连接。

由于大家需要的网友比较多，我已经将资源放在此处，，大家可以去自由下载，谢谢。