package com.demo.app;import java.util.Stack;import android.app.Activity;import android.app.ActivityManager;import android.content.Context;/** * 应用程序Activity管理类：用于Activity管理和应用程序退出 * @version 1.0 * @created 2012-3-21 */public class AppManager {        private static Stack<Activity> activityStack;    private static AppManager instance;        private AppManager(){}    /**     * 单一实例     */    public static AppManager getAppManager(){        if(instance==null){            instance=new AppManager();        }        return instance;    }    /**     * 添加Activity到堆栈     */    public void addActivity(Activity activity){        if(activityStack==null){            activityStack=new Stack<Activity>();        }        activityStack.add(activity);    }    /**     * 获取当前Activity（堆栈中最后一个压入的）     */    public Activity currentActivity(){        Activity activity=activityStack.lastElement();        return activity;    }    /**     * 结束当前Activity（堆栈中最后一个压入的）     */    public void finishActivity(){        Activity activity=activityStack.lastElement();        finishActivity(activity);    }    /**     * 结束指定的Activity     */    public void finishActivity(Activity activity){        if(activity!=null){            activityStack.remove(activity);            activity.finish();            activity=null;        }    }    /**     * 结束指定类名的Activity     */    public void finishActivity(Class<?> cls){        for (Activity activity : activityStack) {            if(activity.getClass().equals(cls) ){                finishActivity(activity);            }        }    }    /**     * 结束所有Activity     */    public void finishAllActivity(){        for (int i = 0, size = activityStack.size(); i < size; i++){            if (null != activityStack.get(i)){                activityStack.get(i).finish();            }        }        activityStack.clear();    }    /**     * 退出应用程序     */    public void AppExit(Context context) {        try {            finishAllActivity();            ActivityManager activityMgr= (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);            activityMgr.restartPackage(context.getPackageName());            System.exit(0);        } catch (Exception e) {    }    }}