Source analysis of "Listviewjson" "Com.demo.app" "AppManager" and its role in engineering

Appmanager.java source code is as follows:

 PackageCom.demo.app;ImportJava.util.Stack;Importandroid.app.Activity;ImportAndroid.app.ActivityManager;ImportAndroid.content.Context;/*** Application Activity Management class: For activity management and application exit *@version1.0 * @created 2012-3-21*/ Public classAppManager {Private StaticStack<activity>Activitystack; Private StaticAppManager instance; PrivateAppManager () {}/*** Single Instance*/     Public StaticAppManager Getappmanager () {if(instance==NULL) {instance=NewAppManager (); }        returninstance; }    /*** Add activity to Stack*/     Public voidaddactivity (activity activity) {if(activitystack==NULL) {Activitystack=NewStack<activity>();    } activitystack.add (activity); }    /*** Gets the current activity (last pressed in the stack)*/     PublicActivity currentactivity () {Activity Activity=activitystack.lastelement (); returnactivity; }    /*** End the current activity (last pressed in the stack)*/     Public voidfinishactivity () {Activity Activity=activitystack.lastelement ();    Finishactivity (activity); }    /*** End the specified activity*/     Public voidfinishactivity (activity activity) {if(activity!=NULL) {activitystack.remove (activity);            Activity.finish (); Activity=NULL; }    }    /*** End activity for specified class name*/     Public voidFinishactivity (class<?>CLS) {         for(Activity activity:activitystack) {if(Activity.getclass (). Equals (CLS)) {finishactivity (activity); }        }    }    /*** End All activity*/     Public voidfinishallactivity () { for(inti = 0, size = activitystack.size (); i < size; i++){            if(NULL!=Activitystack.get (i))            {Activitystack.get (i). Finish ();    }} activitystack.clear (); }    /*** Exit Application*/     Public voidAppExit (Context context) {Try{finishallactivity (); Activitymanager Activitymgr=(Activitymanager) Context.getsystemservice (Context.activity_service);            Activitymgr.restartpackage (Context.getpackagename ()); System.exit (0); } Catch(Exception e) {} }}

Source analysis of "Listviewjson" "Com.demo.app" "AppManager" and its role in engineering