flutter-sport/lib/bean/sportItem.dart

class SportItem {
  String imgUrl;

  SportItem({this.imgUrl});

  SportItem.fromJson(Map<String, dynamic> json) {
    imgUrl = json['imgUrl'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();
    data['imgUrl'] = this.imgUrl;
    return data;
  }
}