颤振http。get在从RapidApi获取数据时出现异常

Question

我一直在创建一个应用程序，在过去的两天里一直在解决这个问题，没有任何进展。从internet获取数据时，请使用http。get请求给了我一个异常。这就是我试图集成到我的应用程序中的Rapid API（IMDB）。我将为您提供我的代码，以便更好地理解。

下面是get请求：

class NetworkGetRequest {
  static Future<Map<String, Object>> getRequestWithQueryParameter(Map<String, dynamic> queryParameters, String url) async {
    Map<String, Object> result = new Map();
    final headers = {
      "content-type": "application/json",
      "x-rapidapi-key": <YOUR-API-KEY>,
      "x-rapidapi-host": "movie-database-imdb-alternative.p.rapidapi.com",
      "useQueryString": true
    };
    try {
      final uri = Uri.https(url, "", queryParameters);
      var response = await http.get(uri, headers: headers);
      Map<String, Object> responseMap = jsonDecode(response.body);
      result['data'] = responseMap;
      return result;
    } catch (e) {
      result['error'] = 'Exception  : ' + e.toString();
      return result;
    }
  }

以下是我调用API的方式：

Map<String, Object> result = new Map();
Map<String, dynamic> queryParam = {
  'i': 'tt12361974',
  'r': 'json',
  'plot': 'full'
};
String url = 'movie-database-imdb-alternative.p.rapidapi.com';
result = await NetworkGetRequest.getRequestWithQueryParameter(queryParam, URL);

这是我从中得到的一个例外：

type '_InternalLinkedHashMap<String, Object>' is not a subtype of type 'Map<String, String>?'

这就是我期望从服务器得到的JSON：

{
"Title": "Zack Snyder's Justice League",
"Year": "2021",
"Rated": "R",
"Released": "18 Mar 2021",
"Runtime": "242 min",
"Genre": "Action, Adventure, Fantasy",
"Director": "Zack Snyder",
"Writer": "Jerry Siegel, Joe Shuster, Zack Snyder",
"Actors": "Henry Cavill, Ben Affleck, Gal Gadot",
"Plot": "Determined to ensure Superman's ultimate sacrifice was not in vain, Bruce Wayne aligns forces with Diana Prince with plans to recruit a team of metahumans to protect the world from an approaching threat of catastrophic proportions. The task proves more difficult than Bruce imagined, as each of the recruits must face the demons of their own pasts to transcend that which has held them back, allowing them to come together, finally forming an unprecedented league of heroes. Now united, Batman, Wonder Woman, Aquaman, Cyborg and The Flash may be too late to save the planet from Steppenwolf, DeSaad and Darkseid and their dreadful intentions.",
"Language": "English, Icelandic, French",
"Country": "United States, United Kingdom",
"Awards": "1 nomination",
"Poster": "https://m.media-amazon.com/images/M/MV5BYjI3NDg0ZTEtMDEwYS00YWMyLThjYjktMTNlM2NmYjc1OGRiXkEyXkFqcGdeQXVyMTEyMjM2NDc2._V1_SX300.jpg",
"Ratings": [
    {
        "Source": "Internet Movie Database",
        "Value": "8.1/10"
    },
    {
        "Source": "Metacritic",
        "Value": "54/100"
    }
],
"Metascore": "54",
"imdbRating": "8.1",
"imdbVotes": "308,599",
"imdbID": "tt12361974",
"Type": "movie",
"DVD": "N/A",
"BoxOffice": "N/A",
"Production": "N/A",
"Website": "N/A",
"Response": "True"
}

Answer 1

我相信API或RapidAPI没有问题，除了未处理的期望之外，一切都很好。请转到这个问题，以解决此异常。

未处理的异常：InternalLinkedHashMap