Flutter Application showing blank screen when trying to invoke a Future Builder - flutter

Question

I am trying to build a futureBuilder with a Future Function that I have which passes through a list of objects which contain the surveyName parameter, I am trying to display that surveyName descriptor into a listView but am noticing that I am getting a blank white screen that isn't showing both the container which is just supposed to show some basic loading functionality and it isn't displaying the information of the getSurveys function either.
I am new to both dart and flutter, so this may just have some basic simple resolution but any information would be helpful. The method getSurveys below in the print displays both names in the print so I know the information is coming in correct for that specific function but I am wondering why it isn't working within the futureBuilder.
The 1 and 2 print statements are running but I am noticing the 3 print statement isn't so that listView Builder is not being invoked for some starnge reason, which may be the cause of this dilemma but I wonder why the container which is just supposed to showcase a loading... is not working correctly either. Output is below this function.
Future<List<Survey_List>> getSurveys() async{
Map map = {
'Type': "getSurveys"
};
var _list = [];
List<Survey_List> surveys = [];
getPost(map).then((Map value){
_list.addAll(value["survey"]);
for (int i = 0; i < _list.length; i++){
Survey_List survey_list = Survey_List(surveyName: _list[i].toString() ,surveyDescription: "", surveyVersion: "");
surveys.add(survey_list);
print(survey_list.surveyName);
}
});
return surveys;
}
Output is as follows:
I/flutter ( 2020): 2
I/flutter ( 2020): 1
I/flutter ( 2020): {"survey":["Survey","Surve3ww"]}
I/flutter ( 2020): Survey
I/flutter ( 2020): Surve3ww
import 'dart:convert';
import 'dart:io';
import 'package:flutter/cupertino.dart';
import 'package:flutter_application/Http.dart';
import 'Config.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class Survey_List extends StatefulWidget {
String surveyName;
String surveyDescription;
String surveyVersion;
Survey_List({
this.surveyName,
this.surveyDescription,
this.surveyVersion,
Key key,
}) : super (key: key);
#override
_SurveyListState createState() => _SurveyListState();
}
class _SurveyListState extends State<Survey_List> {
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text("Surveys"),
),
body: new Container(
child: new FutureBuilder <List<Survey_List>>(
future: getSurveys(),
builder: (BuildContext context, AsyncSnapshot snapshot) {
List<Survey_List> surveys = snapshot.data;
if (snapshot.hasData) {
print(1);
return new ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (BuildContext context, int index) {
print(3);
Survey_List survey_list = surveys[index];
print(survey_list.toString());
return new ListTile(
title: new Text(survey_list.surveyName)
);
},
);
}
else{
print(2);
return new Container(
child: new Center(
child: new Text("Loading...")
)
);
}
},
),
),
);
}
}