<fragment class="com.example.viktor.buyersguide.Section"

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    String[] nameList = new String[Cards.cards.length];

    for(int i = 0; i < Cards.cards.length; i++) {
        nameList[i] = Cards.cards[i];
    }

    ArrayAdapter<String> listAdapter = new ArrayAdapter<>(inflater.getContext(),
            android.R.layout.simple_expandable_list_item_1, nameList);
    setListAdapter(listAdapter);

    return super.onCreateView(inflater, container, savedInstanceState);

String[] nameList = new String[Cards.app.length];

        for(int i = 0; i < Cards.app.length; i++) {
            nameList[i] = Cards.app[i];
        }