DIO 响应解码问题

我在用Dio为了使HTTP request

  var dio = Dio();
    var response =
        await dio.get(URL);
    final responseBody = json.decode(response.data);

    final statusCode = response.statusCode;

    if (statusCode != 200 || responseBody == null) {
      print("status code:$statusCode");
      throw new ServerExceptionHandler(
          "An error ocurred : [Status Code : $statusCode]", statusCode);
    }

我正在解析的响应

{
"x_id": "home"
}

but json.decode(response.data)正在抛出异常。

type '_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'String'

奇怪的是当我更换Dio with http.get(url) then json.decode(response.body)与相同的响应完美配合

您的响应数据已经是一个 Map，因此您可以简单地执行以下操作：

var response = await dio.get(_url);
var responseBody = response.data;
print(responseBody);

这是显式类型：

Response<Map> response = await dio.get(_url);
Map responseBody = response.data;
print(responseBody);