[FIXED] setAdapter(T) cannot be applied to (android.widget.ListAdapter) when using fragment

Issue

I am getting an error at autoCompleteTextView it says setAdapter(T) cannot be applied to (android.widget.ListAdapter)

public class HomeFragmnet extends Fragment {

    TextInputLayout textInputLayout;
    AutoCompleteTextView autoCompleteTextView;
    ListView listView;
    ListAdapter listAdapter;
    

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstancesState){
        View v =inflater.inflate(R.layout.fragment_home, null);

        textInputLayout = (TextInputLayout) v.findViewById(R.id.menu_dropdown);
        autoCompleteTextView = (AutoCompleteTextView) v.findViewById(R.id.drop_items);
        String [] items={"Pune", "Mumbai", "Nashik"};

        listAdapter = new ArrayAdapter<String>(getActivity() , R.layout.items_list, items );
        autoCompleteTextView.setAdapter( listAdapter );


        return v;
    }

}

Solution

According to the docs of AutocompleteTextView its setAdapter method takes a <T extends ListAdapter & Filterable>, meaning the adapter must both extend ListAdapter and implement Filterable.

ListAdapter itself does not implement Filterable, but some subclasses such as ArrayAdapter do.

Answered By - Joachim Sauer
Answer Checked By - Mildred Charles (JavaFixing Admin)