Android-完全退出当前应用程序的四种方法
??? Android程序有很多Activity，比如说主窗口A，调用了子窗口B，如果在B中直接finish(), 接下里显示的是A。在B中如何关闭整个Android应用程序呢?本人总结了几种比较简单的实现方法。
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1. Dalvik VM的本地方法
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public class ScreenManager { private static Stack<Activity> activityStack; private static ScreenManager instance; private ScreenManager(){ } public static ScreenManager getScreenManager(){ if(instance==null){ instance=new ScreenManager(); } return instance; }//退出栈顶Activity public void popActivity(Activity activity){ if(activity!=null){ activity.finish(); activityStack.remove(activity); activity=null; } } //获得当前栈顶Activity public Activity currentActivity(){ Activity activity=activityStack.lastElement(); return activity; } //将当前Activity推入栈中 public void pushActivity(Activity activity){ if(activityStack==null){ activityStack=new Stack<Activity>(); } activityStack.add(activity); } //退出栈中所有Activity public void popAllActivityExceptOne(Class cls){ while(true){ Activity activity=currentActivity(); if(activity==null){ break; } if(activity.getClass().equals(cls) ){ break; } popActivity(activity); } }} ??