How can i make this Custom Adapter work?

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so i am an intern and my supervisor wrote this custom adapter which i am supposed to work with, I get everything in my app to work except when i want to search a listview using Filter...When i run my code, it gives me a null pointer exception at performfiltering when i try to search the edit textbox.I know it's because the method is not seeing the items in my listview but i don't know how to fix it.my custom adapter is below can anyone help me fix it ASAP pls. thank you.

    public class ListBaseAdapter extends BaseAdapter implements Filterable {



private final ArrayList<Object> DATA = new ArrayList<Object>();

private final ArrayList<Object> items = new ArrayList<Object>();

private final Vector<Integer> TYPE = new Vector<Integer>();
private ListBaseAdapterListener listener = null;
private LayoutListener layoutListener = null;


public ListBaseAdapter() {

}

public ListBaseAdapter(ListBaseAdapterListener value) {
    setListener(value);
}

public void setListener(ListBaseAdapterListener value) {
    listener = value;
}

public void setLayoutListener(LayoutListener value) {
    layoutListener = value;
}

@Override
public int getCount() {
    return DATA.size();
}

@Override
public int getViewTypeCount() {
    int max = 0;
    for (int i = 0; i < TYPE.size(); i++) {
        if (TYPE.elementAt(i) > max) {
            max = TYPE.elementAt(i);
        }
    }
    return max + 1;
}

@Override
public Object getItem(int position) {
    return DATA.get(position);
}

@Override
public int getItemViewType(int value) {
    return TYPE.elementAt(value);
}

@Override
public long getItemId(int position) {
    return 0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if (listener != null) {
        return listener.onListGetView(position, convertView, parent);
    }
    return null;
}

public void addItem(Object item, int type) {
    DATA.add(item);
    TYPE.addElement(type);
    notifyDataSetChanged();
}

public void setItem(int position, Object item) {
    DATA.set(position, item);
    notifyDataSetChanged();
}

public void setItem(int position, Object item, int type) {
    DATA.set(position, item);
    TYPE.set(position, type);
    notifyDataSetChanged();
}

public void setItemType(int position, int type) {
    TYPE.set(position, type);
    notifyDataSetChanged();
}

public void removeItem(int position) {
    DATA.remove(position);
    TYPE.remove(position);
    notifyDataSetChanged();
}

public void removeAll() {
    DATA.clear();
    TYPE.clear();
    notifyDataSetChanged();
}

public void onAction(int action, Object parameter) {
    layoutListener.onAction(action, parameter);
}

@Override
public Filter getFilter() {

    Filter filter = new Filter() {

        @SuppressWarnings("unchecked")
        @Override
        protected void publishResults(CharSequence constraint, FilterResults results) {

            List<String> arrayListNames = (List<String>) results.values;
            notifyDataSetChanged();
        }

        @Override
        protected FilterResults performFiltering(CharSequence constraint) {

            FilterResults results = new FilterResults();
            ArrayList<String> FilteredArrayNames = new ArrayList<String>();

            // perform your search here using the searchConstraint String.

            constraint = constraint.toString().toLowerCase();
            for (int i = 0; i < items.size(); i++) {
                String dataNames = (String) items.get(i);
                if (( dataNames).toLowerCase().startsWith(constraint.toString()))  {
                    FilteredArrayNames.add( dataNames);
                }
            }

            results.count = FilteredArrayNames.size();
            results.values = FilteredArrayNames;
            Log.e("VALUES", results.values.toString());

            return results;
        }

        private Object getResources() {
            // TODO Auto-generated method stub
            return null;
        }
    };

    return filter;
}

}

this is how i use my addapter to add to a listview.

    String[] testArray = getResources().getStringArray(R.array.allArrays);
    ListView lv = (ListView) findViewById(R.id.listViewMenuRight);
    final ListBaseAdapter adapter1 = new ListBaseAdapter();

    adapter1.addItem(new MenuItem(string.accomodation, 0), 0);
    lv.setAdapter(adapter1);
    EditText inputSearch = (EditText) findViewById(R.id.editTextSearch);
    inputSearch.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence cs, int arg1, int arg2,
                int arg3) {
            // When user changed the Text
            ((Filterable) adapter1).getFilter().filter(cs);
        }

        @Override
        public void beforeTextChanged(CharSequence arg0, int arg1,
                int arg2, int arg3) {
            // TODO Auto-generated method stub

        }

        @Override
        public void afterTextChanged(Editable arg0) {
            // TODO Auto-generated method stub
        }
    });
    adapter1.setListener(new ListBaseAdapterListener() {
        @Override
        public View onListGetView(int position, View view1, ViewGroup parent) {

            @SuppressWarnings("unused")
            int type = adapter1.getItemViewType(position);

            if (view1 == null) {
                view1 = inflater.inflate(layout.row_menu_item, null);
                view1.setTag(new MenuHolder(view1));
            }

            MenuItem item = (MenuItem) adapter1.getItem(position);

            ((MenuHolder) view1.getTag()).setData(item.TEXT, item.IMAGE);

            view1.setBackgroundResource(drawable.list_selector_menu);

            return view1;
        }
    });

asked 1 min ago

Shaheedah

15