Android 学习 之 关闭应用程序的方法

package com.close; 
import java.util.LinkedList; 
import java.util.Stack; 

import android.app.Activity; 



public class ActivityManager { 

private static LinkedList<Activity> acys; 
private static ActivityManager instance = null; 

private ActivityManager (){} 

public static ActivityManager getInstance(){ 

if(instance == null){ 

instance = new ActivityManager (); 
acys = new LinkedList<Activity>(); 

} 

return instance; 

} 
public void add(Activity acy) 
{ 
acys.add(acy); 
} 
public void remove(Activity acy) 
{ 
acys.remove(acy); 
} 
public void closeAll() 
{ 
Activity acy; 
while(acys.size() != 0) 
{ 
acy = acys.poll(); 
if(!acy.isFinishing()) 
acy.finish(); 
} 
} 

} 

 1.第一种方法：自己定义一个管理Activity的栈