app退出__2

1. 添加权限
<uses-permission android:name="android.permission.RESTART_PACKAGES" />
2. 导入AppManager工具类
AppManager类是一个自定义的工具类，作用是将应用程序所有启动的Activity都添加到堆栈，最终退出应用程序时全部释放掉Activity。

完整的AppManager类代码：
package net.oschina.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
* @author  liux
*/
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();
                if(activity!=null){
                        activity.finish();
                        activity=null;
                }
        }
        /**
         * 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) {        }
        }
}
3. 使用AppManager工具类
Activity启动时，在的onCreate方法里面，将该Activity实例添加到AppManager的堆栈
AppManager.getAppManager().addActivity(this);
需要退出程序时，调用
AppManager.getAppManager().AppExit(this);