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：

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。

package nate.PPT.control;import java.io.Serializable;public class Choices implements Serializable{private int key;public Choices(int key) {super();this.key = key;}public int getKey() {return key;}public void setKey(int key) {this.key = key;}}

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：

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(){@Overridepublic 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(){@Overridepublic 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(){@Overridepublic 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(){@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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

<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.csdn.net/detail/natepan/3849822，大家可以去自由下载，谢谢。

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