Flutter SearchDelegate如何在buildResults中显示数据

Question

1. 你好，我是新手，我开始做新闻应用程序，在搜索文章时我需要帮助来显示文章。

   @override Widget buildResults(BuildContext context) {
       //  show some result based on the selection
       if (query.length < 3) {
         return Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
             Center(
               child: Text(
                 "Search term must be longer than two letters.",
               ),
             )
           ],
         );
       }
     }
   

2. 这是我获取数据的方式：

   class SearchNewsClass {
    List<SearchModel> searches = [];
    Future<void> getSearches(String query) async {
    String url ="https://newsapi.org/v2/everything?q=$query&sortBy=popularity&apiKey=$_apiKey";
   
   var response = await http.get(url);
   
   var jsonData = jsonDecode(response.body);
   
   if (jsonData['status'] == "ok") {
     jsonData["articles"].forEach((element) {
       if (element["urlToImage"] != null && element['description'] != null) {
         SearchModel searchModel = SearchModel(
           title: element["title"],
           author: element["author"],
           description: element["description"],
           url: element["url"],
           urlToImage: element["urlToImage"],
           content: element["context"],
           publishedAt: element["publishedAt"],
         );
         searches.add(searchModel);
       }
     });
   }
   

   } }