Android Transform the current Fragment Class to Activity Class -

i have fragment somethings related searchview works well,

but want create activity perform tasks typically fragment.

there no problem xmls main problem in java code.some methods in fragment , don't know opposite of them in activity.

fragment code:

public class airlinesearchfragment extends fragment implements searchview.onquerytextlistener{     private recyclerview recyclerview;     private list<airlinedata> airlinesdatamodel;     private airlinessearchviewadapter adapter;      public airlinesearchfragment()     {         sethasoptionsmenu(true);      }     @override     public void oncreate(bundle savedinstancestate) {         sethasoptionsmenu(true);         super.oncreate(savedinstancestate);     }      @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {         sethasoptionsmenu(true);          view view = inflater.inflate(r.layout.airline_search_fragment, container, false);          recyclerview = (recyclerview) view.findviewbyid(r.id.recyclerview);         linearlayoutmanager layoutmanager = new linearlayoutmanager(getactivity());         recyclerview.setlayoutmanager(layoutmanager);         return view;     }       @override     public void onviewcreated(view view, bundle savedinstancestate) {         super.onviewcreated(view, savedinstancestate);          sethasoptionsmenu(true);         string[] locales = locale.getisocountries();         airlinesdatamodel = new arraylist<>();         airlinesdatamodel.addall(airlinescore.airlineslist);         adapter = new airlinessearchviewadapter(airlinesdatamodel);         recyclerview.setadapter(adapter);     }       @override     public void oncreateoptionsmenu(menu menu, menuinflater inflater) {         inflater.inflate(r.menu.auto_complete, menu);          final menuitem item = menu.finditem(r.id.action_search);         final searchview searchview = (searchview) menuitemcompat.getactionview(item);         searchview.setonquerytextlistener(this);          menuitemcompat.setonactionexpandlistener(item,                 new menuitemcompat.onactionexpandlistener() {                     @override                     public boolean onmenuitemactioncollapse(menuitem item) {                         // when collapsed                         adapter.setfilter(airlinesdatamodel);                         return true; // return true collapse action view                     }                      @override                     public boolean onmenuitemactionexpand(menuitem item) {                         // when expanded                         return true; // return true expand action view                     }                 });     }      @override     public boolean onquerytextchange(string newtext) {         final list<airlinedata> filteredmodellist = filter(airlinesdatamodel, newtext);         adapter.setfilter(filteredmodellist);         return true;     }      @override     public boolean onquerytextsubmit(string query) {         return false;     }      private list<airlinedata> filter(list<airlinedata> models, string query) {         query = query.tolowercase();          final list<airlinedata> filteredmodellist = new arraylist<>();         (airlinedata model : models) {             if(model.arabicname==null)             {                 model.arabicname="";             }             if(model.shortname==null)             {                 model.shortname="";             }             if(model.name==null)             {                 model.name="";             }             final string text = model.name.tolowercase()+model.shortname.tolowercase()                     +model.arabicname.tolowercase()+model.code.tolowercase();             if (text.contains(query)) {                 filteredmodellist.add(model);             }         }         return filteredmodellist;     }   } 

my activity methods copied fragment(what should add it?):

public class airlinessearchactivity extends appcompatactivity implements searchview.onquerytextlistener{      private recyclerview recyclerview;     private list<airlinedata> airlinesdatamodel;     private airlinessearchviewadapter adapter;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_airlines_search);      }      @override     public boolean onquerytextchange(string newtext) {         final list<airlinedata> filteredmodellist = filter(airlinesdatamodel, newtext);         adapter.setfilter(filteredmodellist);         return true;     }     @override     public boolean onquerytextsubmit(string query) {         return false;     }     private list<airlinedata> filter(list<airlinedata> models, string query) {         query = query.tolowercase();          final list<airlinedata> filteredmodellist = new arraylist<>();         (airlinedata model : models) {             if(model.arabicname==null)             {                 model.arabicname="";             }             if(model.shortname==null)             {                 model.shortname="";             }             if(model.name==null)             {                 model.name="";             }             final string text = model.name.tolowercase()+model.shortname.tolowercase()                     +model.arabicname.tolowercase()+model.code.tolowercase();             if (text.contains(query)) {                 filteredmodellist.add(model);             }         }         return filteredmodellist;     } } 

try moving logic in oncreateview , onviewcreated activity.oncreate().

then override oncreateoptionsmenu in activity , copy logic had in fragment