在`ImageAdapter中设置自定义字体扩展了BaseAdapter`

public class ImageAdapter extends BaseAdapter {
    private Context mContext;
    private List<String> mData;
    private LayoutInflater mInflater;
    private Typeface mCustomFont;

    public ImageAdapter(Context context, List<String> data) {
        mContext = context;
        mData = data;
        mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        mCustomFont = Typeface.createFromAsset(context.getAssets(), "fonts/custom_font.ttf");
    }

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

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

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;

        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.list_item, parent, false);
            holder = new ViewHolder();
            holder.textView = convertView.findViewById(R.id.text_view);
            holder.textView.setTypeface(mCustomFont);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.textView.setText(mData.get(position));

        return convertView;
    }

    static class ViewHolder {
        TextView textView;
    }
}