setting visibility of a spinner in fragment class

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Android

I have a fragment class with 2 spinners, one spinner has 3 values namely retailer, admin and subscriber, when the retailer option is clicked the 2nd spinner must be visible and when the other 2 options are clicked the 2nd spinner must be invisible.

the code i used is as follows
this is the first spinner in onResume method of the fragment.

logAs = (Spinner) getActivity().findViewById(R.id.spinner5);
        List list = new ArrayList();
        list.add("Subscriber");
        list.add("Retailer");
        list.add("Administrator");
        ArrayAdapter dataAdapter = new ArrayAdapter(getActivity(), android.R.layout.simple_spinner_item, list);
        dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        logAs.setAdapter(dataAdapter);
        logAs.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                switch (position){
                    case 0:
                       //chooseRetailerDetails();
                       // choodeRetailer.setVisibility(View.INVISIBLE);
                       
                        break;
                    case 1:
                        chooseRetailerDetails();
                        
                        //choodeRetailer.setVisibility(View.VISIBLE);
                        break;
                    case 3:
                        //choodeRetailer.setEnabled(false);
                        
                        break;
                }
            }
        });

now in the case statement when i try to set the visibility of the second spinner i get a null pointer exception.