Refresh fragment in Android -


i have 2 tabs , each has 1 fragment. each fragment has recycler views. have action bar , have search property in (i'm using materialsearchview). want search data in each fragment when app loading, search working first fragment, if swipe next fragment , come first fragment search not working because methods related first fragment not getting called. how call them when user in first fragment.

    public class tab1fragment extends fragment {         private static final string tag = "tab1fragment";         context c;         string user_name,password;         materialsearchview materialsearchview;         string url = null;          recyclerview rv1;         tablelayout tablayout;         @nullable         @override         public view oncreateview(layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {              setuservisiblehint(false);             view view = inflater.inflate(r.layout.tab1_fragment,container,false);              tablayout=(tablelayout) view.findviewbyid(r.id.tablelayout);             final tablelayout tablayout1=(tablelayout)view.findviewbyid(r.id.tablelayout1);             final tablelayout tablayout2=(tablelayout)view.findviewbyid(r.id.tablelayout2);              materialsearchview = (materialsearchview)getactivity().findviewbyid(r.id.search_view);              sharedpreferences sharedpreferences=this.getactivity().getsharedpreferences("postman", context.mode_private);             user_name=sharedpreferences.getstring("username","nothing");             password=sharedpreferences.getstring("password","nothing");               rv1 = (recyclerview) view.findviewbyid(r.id.mrecycler1);               rv1.setlayoutmanager(new linearlayoutmanager(c));             rv1.setitemanimator(new defaultitemanimator());                 download2 d2 = new download2(getactivity(),url,rv1,user_name,password,tablayout,materialsearchview);              d2.execute();              return view;         }  other fragment is:  public class tab3fragment extends fragment { private static final string tag = "tab3fragment";  string user_name,password; context c; materialsearchview materialsearchview3; recyclerview rv, rv1; tablelayout tablayout1 , tablayout;   @nullable @override public view oncreateview(layoutinflater inflater, @nullable viewgroup container, @nullable bundle savedinstancestate) {     setuservisiblehint(false);     view view = inflater.inflate(r.layout.tab3_fragment,container,false);       tablayout1=(tablelayout)view.findviewbyid(r.id.tablelayout1);       materialsearchview3 = (materialsearchview)getactivity().findviewbyid(r.id.search_view);      sharedpreferences sharedpreferences=this.getactivity().getsharedpreferences("postman", context.mode_private);     user_name=sharedpreferences.getstring("username","nothing");     password=sharedpreferences.getstring("password","nothing");      rv = (recyclerview) view.findviewbyid(r.id.mrecycler);       rv.setlayoutmanager(new linearlayoutmanager(c));     rv.setitemanimator(new defaultitemanimator());       return view; }  @override public void setmenuvisibility(boolean menuvisible) {     super.setmenuvisibility(menuvisible);     if(menuvisible)     {         download3 d3 = new download3(getactivity(),url,rv,user_name,password,tablayout1, materialsearchview3);         d3.execute();     }    }  }


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