参数类型"响应<dynamic>"不能分配给 Flutter 上'String'参数类型

Question

我试图把一个响应(从api)在地图上，但我不能使它工作。

下面是代码:

Map<String, dynamic> map = jsonDecode(response);

"response"文字显示红色错误，我无法运行应用程序。

The argument type 'Response<dynamic>' can't be assigned to the parameter type 'String'.dartargument_type_not_assignable

我也试过把response.toString()和应用程序甚至运行，但我得到几个错误，如

E/flutter (10331): #0      _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1404:5)
E/flutter (10331): #1      _ChunkedJsonParser.parse (dart:convert-patch/convert_patch.dart:934:48)
E/flutter (10331): #2      _parseJson (dart:convert-patch/convert_patch.dart:40:10)

有人能帮帮我吗

响应json为:

[
{
"Code": 2025,
"Qty": 4,
"Desc": "SERVIÇO DE ALINHAR EIXOS",
"OsNumber": "3862"
},
{
"Code": 204457,
"Qty": 1,
"Desc": "SERVIÇO REPARO",
"OsNumber": "3862"
}
]

Answer 1

您需要使用(response.body)来调用该方法而不是仅仅(响应)。所以你的代码应该是:

var map = jsonDecode(response.body);

Answer 2

final extractedData = json.decode(response.body) as Map<String, dynamic>;

然后

final List<product> loadedProducts = [];
extractedData.forEach((key, value) {
loadedProducts.add(product(
id: key,
title: value['Code'],
description: value['Qty'],
price: value['Desc'],
imageUrl: value['OsNumber'],

));

product是你的

的Model类

{
"Code": 2025,
"Qty": 4,
"Desc": "SERVIÇO DE ALINHAR EIXOS",
"OsNumber": "3862"
},

this Object。你会得到对象列表。因此，为这个对象创建一个Model类，并命名为product。飞镖。然后代码就可以工作了

这是你的对象的模型

class product {
int code;
int qty;
String desc;
String osNumber;
product({this.code, this.qty, this.desc, this.osNumber});
product.fromJson(Map<String, dynamic> json) {
code = json['Code'];
qty = json['Qty'];
desc = json['Desc'];
osNumber = json['OsNumber'];
}
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = new Map<String, dynamic>();
data['Code'] = this.code;
data['Qty'] = this.qty;
data['Desc'] = this.desc;
data['OsNumber'] = this.osNumber;
return data;
}
}