MyApplicationAid.java

package com.cgcl.cloudesk.screens.act.aid;

import java.util.LinkedList;
import java.util.List;

import android.app.Application;
import android.app.Activity;

public class MyApplicationAid extends Application {
	private List<Activity> activityList = new LinkedList<Activity>();   
	 private static MyApplicationAid instance;  
	   
	            private MyApplicationAid()  
	            {  
	            }  
	             //单例模式中获取唯一的MyApplication实例   
	             public static MyApplicationAid getInstance()  
	             {  
	                            if(null == instance)  
	                          {  
	                             instance = new MyApplicationAid();  
	                          }  
	                 return instance;               
	  
	             }  
	             //添加Activity到容器中  
	             public void addActivity(Activity activity)  
	             {  
	                            activityList.add(activity);  
	             }  
	             //遍历所有Activity并finish  
	  
	             public void exit()  
	             {  
	  
	                          for(Activity activity:activityList)  
	                         {  
	                           activity.finish();  
	                         }  
	  
	                           System.exit(0);  
	  
	            }  
}