Android : pass context of activity in AdapterView.OnItemClickListener(){} nested in fragment - The method is undefined

I have a problem with pass the context of activity in this method

        private void registerClicksOnParents(ListView listView, final Dialog d, final   
        ImageButton btn, final ChildAndActivityDataClass currentChild) {
        listView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,int position, long id) {

                d.dismiss();
                btn.setImageResource(R.drawable.odebrany);
                btn.setEnabled(false);          
                currentChild.setOdbiorDzieckaIdOfState(App_class.odebrane);
                SingleInfoToServer singleInfoToServer = SingleInfoToServer(currentChild.getIdOfChild(), 
                                                                           currentChild.getOdbiorDzieckaIdOfActivity(), 
                                                                           currentChild.getOdbiorDzieckaIdOfState(),
                                                                           context);
            }               
        });


    }   

When I invoke this method in onItemClick I can't use getActivity, I try with, MainScreen.this but nothing works. I try to get context in Fragment onCreate method this way:

public class Aktywnosci_Fragment extends Fragment {

Context context ;

@Override
public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    context = getActivity();

}

but it stills shows the same The method SingleInfoToServer(int, int, int, Context) is undefined for the type new AdapterView.OnItemClickListener(){}

This method constructor looks like this

public SingleInfoToServer( int idOfChild,  int idOfActivity, int idOfState, Context context) 
{
    this.context = context;     
    this.idOfChild = idOfChild;
    this.idOfActivity = idOfActivity;
    this.idOfState = idOfState;
}

so everything should works