java - Sending data from FragmentController's onActivityResult to Fragment -


hello have problem sending string fragmentcontroller fragment because onactivityresult in fragmentcontroller done later creating of fragments theirs ui's. want pass string fragmentcontroller , show textview in fragment.

my fragmentcontroller:

public class fragmentcontroller extends appcompatactivity implements home.onfragmentinteractionlistener,         certificate.onfragmentinteractionlistener, challenges.onfragmentinteractionlistener, googleapiclient.onconnectionfailedlistener{      private googleapiclient googleapiclient;     private static final int req_code = 9001;     private string name = null;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_fragment_controller);          googlesigninoptions signinoptions = new googlesigninoptions.builder(googlesigninoptions.default_sign_in).requestemail().build();         googleapiclient = new googleapiclient.builder(this).enableautomanage(this,this).addapi(auth.google_sign_in_api,signinoptions).build();         signin();           sectionspageradapter msectionspageradapter = new sectionspageradapter(getsupportfragmentmanager());         viewpager mviewpager = (viewpager) findviewbyid(r.id.container);         mviewpager.setadapter(msectionspageradapter);          tablayout tablayout = (tablayout) findviewbyid(r.id.tabs);         tablayout.setupwithviewpager(mviewpager);     }      @override     public boolean onoptionsitemselected(menuitem item) {         int id = item.getitemid();         return id == r.id.action_settings || super.onoptionsitemselected(item);     }      @override     public void onconnectionfailed(@nonnull connectionresult connectionresult) {      }      private void signin(){         intent intent = auth.googlesigninapi.getsigninintent(googleapiclient);         startactivityforresult(intent,req_code);     }      private void handleresult(googlesigninresult result){         if(result.issuccess()){             googlesigninaccount account = result.getsigninaccount();             assert account != null;             name = account.getdisplayname();             system.out.println("6");         }     }      @override     protected void onactivityresult(int requestcode, int resultcode, intent data) {         system.out.println("5");         super.onactivityresult(requestcode, resultcode, data);          if(requestcode == req_code){             googlesigninresult result = auth.googlesigninapi.getsigninresultfromintent(data);             handleresult(result);         }     }      public string getname() {return name;} }

my sectionspageradapter:

class sectionspageradapter extends fragmentpageradapter {      sectionspageradapter(fragmentmanager fm) {         super(fm);     }      @override     public fragment getitem(int position) {         switch (position) {             case 0: return fragment1.newinstance();             case 1: return fragment2.newinstance();             case 2: return fragment3.newinstance();             default: return null;         }     }      @override     public int getcount() {return 3;}      @override     public charsequence getpagetitle(int position) {         switch (position) {             case 0: return "fragment1";             case 1: return "fragment2";             case 2: return "fragment3";             default: return null;         }     } }

and fragment want view string fragmentcontroller (username):

public class fragment2 extends fragment {      public fragment2() {}      public static fragment2 newinstance() {return new fragment2();}      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);     }      @override     public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {         fragmentcontroller fragmentcontroller = (fragmentcontroller) getactivity();         view view = inflater.inflate(r.layout.fragment_fragment2, container, false);          textview user = view.findviewbyid(r.id.certificateuser);         user.settext(fragmentcontroller.getname());         return view;     }      @override     public void onattach(context context) {super.onattach(context);}      @override     public void ondetach() {super.ondetach();}      public interface onfragmentinteractionlistener {} }

if want print string everywhere null if print directly in handleresult there correct username. debugging , find out onactivityresult done last , issue fragment has null string because created , string passed before inicialization.


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