错误：类型列表不是类型映射的子类型

Question

因此，我创建了一个应用程序，通过api读取数据，并尝试解析JSON api

这是我的错误截图

我试着把它改成一个列表，但它仍然读取一个错误

这是我的密码大象。飞奔

@JsonSerializable()
class ElephantList{
  ElephantList({this.biodata});
  final List<Elephant> biodata;
  factory ElephantList.fromJson(Map<String, dynamic> json) => _$ElephantListFromJson(json);
  Map<String, dynamic> toJson() => _$ElephantListToJson(this);
}

@JsonSerializable()
class Elephant{
  Elephant({this.name, this.affiliation, this.species,
  this.sex, this.fictional, this.dob, this.dod, this.wikilink, this.image, this.note});
  //final String index;
  final String name;
  final String affiliation;
  final String species;
  final String sex;
  final String fictional;
  final String dob;
  final String dod;
  final String wikilink;
  final String image;
  final String note;

  factory Elephant.fromJson(Map<String, dynamic> json) => _$ElephantFromJson(json);
  Map<String, dynamic> toJson() => _$ElephantToJson(this);
}

Future<ElephantList> getElephantList() async{
  const url = 'https://elephant-api.herokuapp.com/elephants/sex/male';
  final response = await http.get(url);
  if(response.statusCode ==  200){
    return ElephantList.fromJson(json.decode(response.body));
  }else{
    throw HttpException('Error ${response.reasonPhrase}', uri: Uri.parse(url));
  }
}

如何纠正此错误？请帮忙

Answer 1

api:https://elephant-api.herokuapp.com/elephants/sex/male返回大象列表，格式为：[大象，大象，…] 映射时

@JsonSerializable(anyMap: true)
class ElephantList{
  ElephantList({this.biodata});
  final List<Elephant> biodata;
  factory ElephantList.fromJson(List<dynamic> json) => _$ElephantListFromJson(json);
  List<dynamic> toJson() => _$ElephantListToJson(this);
}

@JsonSerializable()
class Elephant{
  Elephant({this.name, this.affiliation, this.species,
  this.sex, this.fictional, this.dob, this.dod, this.wikilink, this.image, this.note});
  //final String index;
  final String name;
  final String affiliation;
  final String species;
  final String sex;
  final String fictional;
  final String dob;
  final String dod;
  final String wikilink;
  final String image;
  final String note;

  factory Elephant.fromJson(Map<String, dynamic> json) => _$ElephantFromJson(json);
  Map<String, dynamic> toJson() => _$ElephantToJson(this);
}

Future<ElephantList> getElephantList() async{
  const url = 'https://elephant-api.herokuapp.com/elephants/sex/male';
  final response = await http.get(url);
  if(response.statusCode ==  200){
    return ElephantList.fromJson(json.decode(response.body));
  }else{
    throw HttpException('Error ${response.reasonPhrase}', uri: Uri.parse(url));
  }
}

编辑：@JsonSerializable要求json作为映射