[Fragment to Activity] enviar datos cuando el fragmento esta visible para el usuario por medio de interfaz a una actividad #Fragment #Java #Android

EnlacesActivity.java

public class EnlacesActivity extends FragmentActivity implements InterfacesClass.OnFragmentInteractionListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_enlace);
    }

    @Override
    public void onFragmentCreated(HashMap<String, String> data) {
       Log.d("onFragmentCreated", String.valueOf(data));
    }
  
}

InterfacesClass.java

public class InterfacesClass {

    public interface OnFragmentInteractionListener {
        void onFragmentCreated (HashMap<String, String> data);
    }

}

PageOne.java

public class PageOne extends Fragment implements InterfacesClass.FragmentLifecycle {

    private InterfacesClass.OnFragmentInteractionListener listener;

    @Override
    public void onAttach(Context context) {
        try {
            listener = (InterfacesClass.OnFragmentInteractionListener) getActivity();
        } catch (ClassCastException e) {
            throw new ClassCastException(context.toString() + " must implement OnFragmentInteractionListener");
        }
        super.onAttach(context);
    }

    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
        super.setUserVisibleHint(isVisibleToUser);
        if (isVisibleToUser) {

            HashMap<String, String> dbData;

            dbData = new HashMap<>();
            dbData.put("dato a", "dato b");
            dbData.put("dato c", "dato d");
            dbData.put("dato e", "dato f");

            listener.onFragmentCreated(dbData);
            Log.i("Fragment", "call activity: " +  dbData.toString());
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_page_one, container, false);
        ButterKnife.bind(this, view);
        return view;
    }
}