'_InternalLinkedHashMap<String，dynamic>‘不是'List<dynamic>’颤振的一个子类型

Question

我刚开始使用api和dart和flutter。我成功地完成了几个，但我觉得这个有点棘手。因此，我正在显示供用户选择的项目列表。每个列表项上的文本应该是数据键。一旦它被打开，它就会显示该索引的所有细节。

这是我试图消耗的响应。

响应

{
    "status": "success",
    "data": {
        "Ikeja Electric (IKEDC)": {
            "service_id": "ikeja-electric",
            "type": [
                "prepaid",
                "postpaid"
            ]
        },
        "Eko Electric (EKEDC)": {
            "service_id": "eko-electric",
            "type": [
                "prepaid",
                "postpaid"
            ]
        },
        "Ibadan Electric (IBEDC)": {
            "service_id": "ibadan-electric",
            "type": [
                "prepaid",
                "postpaid"
            ]
        },
        "Kano Electric (KEDCO)": {
            "service_id": "kano-electric",
            "type": [
                "prepaid",
                "postpaid"
            ]
        },
        "Jos Electricity Distribution (JED)": {
            "service_id": "jos-electric",
            "type": [
                "prepaid",
                "postpaid"
            ]
        },
        "Port-Harcourt Electric (PHED)": {
            "service_id": "portharcourt-electric",
            "type": [
                "prepaid",
                "postpaid"
            ]
        }
    }
}

get请求

Map<String, dynamic> networks;
...

fetchNetworks() async{
    var uri = ApiService.BASE_URL + "endpoint";
    try {
      final response = await http.get(
        uri,
        headers: {'Content-Type': 'application/json','Authorization': 'Bearer ' + _bloc.bearerToken, },
      );
      final responseJson = json.decode(response.body);
      print(responseJson.toString());
      setState(() {
        widget.networks = responseJson["data"];
      });
      return responseJson;
    } catch (exception) {
      print(exception);
    }
  }
}

I

如果要使用一个模型，我如何构造它呢？

Answer 1

我建议使用这个库https://github.com/k-paxian/dart-json-mapper，它将允许您很好地将复杂的JSON映射到Dart类