如何通过更改下拉菜单项来更新列表视图

Question

我想在更改下拉菜单项时更改列表。.列表是动态的，因此我从下拉菜单更改了选项。.我的列表应更新，仅当调用该API时才会更改列表会被所选的下拉项目更改。整个网址将相同，唯一的更改是该项目。

      Future<ParsedDataModel> fetchTicketListData(String queueName) async {
  String openURL = "example.com/query=Queue='$queueName'";
         // hitting login api
      final response3 = await http.get(openURL);
     print(response3.body);
      if (response3.statusCode == 200 && response3.body.contains("200 Ok")) 
     {
  // parsing plain data to desired model
  ParsedDataModel ticketDataModel =
      DashBoardViewController().plainDataToParsedModelData(response3.body.trim());
  return ticketDataModel;
} else {
  throw Exception('There was a problem');
}
 }

   Future<List<QueueModel>> fetchTicketsList() async {
var dataList = await fetchTicketListData('InternalTools');
if (dataList.isNoResult) {
  throw Exception('No result found.');
} else {
  List<QueueModel> openTicketList = makeTicketList(dataList);
 openTicketsList = openTicketList;
  return openTicketsList;
       }
   }

   // function to parse the data into list of (QueueModel)
    List<QueueModel> makeTicketList(ParsedDataModel parsedData) {
     return 


   DashBoardViewController().parsedDataToQueueModelData(parsedData.dataList);
  }