@Override
public int getItemViewType(int position) {
    // if there is both footerResource and header
    switch (STATE) {
        case BOTH:
            if (position == 0) {
                return HEADER;
            } else if (position == list.length + 1) {
                return FOOTER;
            }
            return ITEM;
        case HEADER:
            return position == 0 ? HEADER : ITEM;
        case FOOTER:
            return position == list.length ? FOOTER : ITEM;
        default:
            return ITEM;
    }
}