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(){

			@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

<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。