Flutter 在 Http GET 方法中发送 json 正文

问题描述

我尝试了很多解决方案，但它仍然给我同样的错误：

“未处理的异常：类型 '_InternalLinkedHashMap' 不是类型 'Map?' 的子类型”

 Future<GetCustomerList> _getStateList() async {
final SharedPreferences prefs = await SharedPreferences.getInstance();
var token = prefs.getString("userToken");
 final String url = "http://194.195.245.189:8069/get_partners?params: {}";
Map<dynamic,dynamic> qParams = {
  "params": {}
};
Map<String,String> headers = {'Cookie':'session_id=$token','Content-Type':'application/json; charset=UTF-8'};
var customerList = await http.get(Uri.parse(url),headers: headers,body: qParams);
if (customerList.statusCode == 200) {
  return GetCustomerList.fromJson(json.decode(customerList.body));
} else {
  throw Exception('Failed to load Customers');
}

}

解决方法

你必须从这个链接中获得灵感，把你的结果转换成地图

Unhandled Exception: InternalLinkedHashMap<String,dynamic>' is not a subtype of type 'List<dynamic>