exit.java

package com.example.love_reading;
import java.util.LinkedList;
import java.util.List;
import android.app.Activity;
import android.app.Application;
public class exit extends Application {

	private List<Activity> activityList=new LinkedList<Activity>();
	private static exit instance;
    private exit()
    {
    	
    }
    public static exit getInstance()
    {
    	if(null == instance)
    	{
    		instance = new exit();
    	}
    return instance;
    }
    public void addActivity(Activity activity)
    {
    	activityList.add(activity);
    }
    public void exit()
    {
    	for(Activity activity:activityList)
    	{
    		activity.finish();
    	}
    	System.exit(0);
    }
}