activity manager - How to kill background running apps in Android ? -


i want develop task-killer . task of app kill background running applications . have searched lot in internet , found following code kill installed application . 

list<applicationinfo> packages;     packagemanager pm;     pm = getpackagemanager();     //get list of installed apps.     packages = pm.getinstalledapplications(0);      activitymanager mactivitymanager = (activitymanager)context.getsystemservice(context.activity_service);     (applicationinfo packageinfo : packages) {         if((packageinfo.flags & applicationinfo.flag_system)==1)continue;         if(packageinfo.packagename.equals("mypackage")) continue;         mactivitymanager.killbackgroundprocesses(packageinfo.packagename);    }

but code kills installed applications . want kill apps running in background .i not want kill apps without android os shutdown . can me in purpose ?


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