Flutter-未处理的异常：FormatException：意外字符（在字符1处）回应实例

问题描述：

虽然我正在获取一个api，但控制台显示如下错误

While I'm getting an api, console showing an error like below

E / flutter（10838）：[错误：flutter /lib/ui/ui_dart_state.cc(157）]未处理的异常：FormatException：意外的字符（在字符1）

E/flutter (10838): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: FormatException: Unexpected character (at character 1)

E / flutter（10838）：响应的实例'

E/flutter (10838): Instance of 'Response'

E / flutter（10838）：^

E/flutter (10838): ^

E / flutter（10838）：

E/flutter (10838):

这就是我获取api的方式

 Future _fetchPost() async {
    http.Response response = await http.get(url);

    if (response.statusCode == 200) {
      print(response.statusCode);
      print(json.decode(response.body));
    } else {
      print(response.statusCode);
    }

    setState(() {
      String jsonsDataString = response.toString();
      _data = jsonDecode(jsonsDataString);
      print(_data.toString());
    });

    return "Success";
  }

状态码返回200和一些api

I / flutter（10838）：200

I/flutter (10838): 200

I / flutter（10838））：[{restaurant_id：1010000001，restaurant_name：
咖啡馆，restaurant_image：
http：// .unicomerp。/ 1010000001.jpg ，
table_id：1，table_name：Riyadh-e 01，branch_name：I
Cah，nurl：
http://snapittaitt.net/api/menu/10 /？org = 000001& branch_id = 100it = 10& offset = 20& lang = en ，
table_menu_list：[{menu_category：沙拉和汤，menu_category_id：
11，menu_category_image：
http://res.net/iRet/Item/ItemGroup_11.jpg ，
nexturl：
> http://snapittappt.net/api/ menu / 20 /？org = 1010000001& branch_id = 10000001& menuCat = it = 10& offset = 20& lang = en ，
category_dishes：[{dish_id：100001，菜名：菠菜沙律，
dish_price：7.95，dish_image：
http：//餐厅。 umerp.net////1000000/Items/100000001.jpg ，
dish_currency：SAR，dish_calories：15.0，dish_description：新鲜的
菠菜，蘑菇和硬鸡蛋，配上热培根
香醋，dish_Availability：true，dish_Type：2，nexturl：
http：// snapitt

I/flutter (10838): [{restaurant_id: 1010000001, restaurant_name: Cafe, restaurant_image: http://.unicomerp./1010000001.jpg, table_id: 1, table_name: Riyadh-e 01, branch_name: I Cah, nurl: http://snapittaitt.net/api/menu/10/?org=000001&branch_id=100it=10&offset=20&lang=en, table_menu_list: [{menu_category: Salads and Soup, menu_category_id: 11, menu_category_image: http://res.net/iRet/Item/ItemGroup_11.jpg, nexturl: http://snapittappt.net/api/menu/20/?org=1010000001&branch_id=10000001&menuCat=it=10&offset=20&lang=en, category_dishes: [{dish_id: 100001, dish_name: Spinach Salad, dish_price: 7.95, dish_image: http://restaurants.umerp.net///1000000/Items/100000001.jpg, dish_currency: SAR, dish_calories: 15.0, dish_description: Fresh spinach, mushrooms, and hard egg served with warm bacon vinaigrette, dish_Availability: true, dish_Type: 2, nexturl: http://snapitt

E / flutter（10838）：[错误：flutter / lib / ui / ui_dart_state.cc（157）]
未处理的异常：FormatException：意外的字符（在
处）字符1）

E/flutter (10838): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception: FormatException: Unexpected character (at character 1)

E / flutter（10838）：响应的实例

E/flutter (10838): Instance of 'Response'

E / flutter（10838）：^

E/flutter (10838): ^

E / flutter（10838）：

E/flutter (10838):

如何解决此问题以获取所有api？

How can I solve this to achieve getting all api?

任何建议都会有所帮助：）

Any suggestions would be helpful:)

答

更改此内容：

String jsonsDataString = response.toString(); // Error: toString of Response is assigned to jsonDataString.
_data = jsonDecode(jsonsDataString);
print(_data.toString());

到此：

String jsonsDataString = response.body.toString(); // toString of Response's body is assigned to jsonDataString
_data = jsonDecode(jsonsDataString);
print(_data.toString());

如果有任何疑问，请发表评论。

I hope this helps, in case of any doubt please comment.

Flutter-未处理的异常：FormatException：意外字符（在字符1处）回应实例

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