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

                                             

                                                      

以上是手机端简单的运行效果图

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。

+ View Code

　　

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

1 2	<uses-permission android:name= "android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name= "android.permission.INTERNET" />

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。

如果有朋友需要整个工程源码的，在下面留下邮箱，我将发送给你！

由于大家需要的网友比较多，我已经将资源放在此处，http://download.youkuaiyun.com/detail/natepan/3849822，大家可以去自由下载，谢谢。