CatalogAdapter.java

public class CatalogAdapter extends ArrayAdapter<BookObject> {

    public CatalogAdapter(Activity context, List<BookObject> books) {
        super(context, 0, books); // 2nd par is 0 because we inflate manually
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // Check if the existing view is being reused, otherwise inflate the view
        View listItemView = convertView;

        if (listItemView == null) {

            listItemView = LayoutInflater.from(getContext()).inflate(

                    R.layout.catalog_grid_list, parent, false);

        }

         BookObject currentBook = getItem(position);


        TextView TitleTextView = (TextView) listItemView.findViewById(R.id.catalog_Title_text_view);
        TitleTextView.setText(currentBook.getTitle());

        TextView SubtitleTextView = (TextView) listItemView.findViewById(R.id.catalog_Subtitle_text_view);
        SubtitleTextView.setText(currentBook.getSubtitle());

        String title = currentBook.getAuthors();

        TextView AuthorsTextView = (TextView) listItemView.findViewById(R.id.catalog_Authors_text_view);
        AuthorsTextView.setText(title);


        ImageView ThumbnailImageView = (ImageView) listItemView.findViewById(R.id.catalog_book_image_id);
        Picasso.with(CatalogActivity.mCatalogActivity).load(currentBook.getImageURL()).into(ThumbnailImageView);

        return listItemView;
    }

}