API call returns the json string twice

I'm trying to return a json string in Flutter. I'm using the print function to display the output in the console. However my code is returning the String twice. Here is my code:

import 'package:flutter/material.dart';
import 'dart:convert';
import 'package:http/http.dart' as http;

void main() => runApp(new HomePage());

class HomePage extends StatelessWidget {

  Future<http.Response> fetchPost() async{
    return await http.get('https://api.npoint.io/8c7aafe809d73af5f2b9');
  }

  void Data() async {
    var jsonString = await fetchPost();
    print(jsonString.body);
  }

  @override
  Widget build(BuildContext context) {
    Data();
    return new MaterialApp(
      home: new Center(
        child: new Text('Data'),
      ),
    );
  }
}

Solution 1: Nassar

The build method is called twice causing the whole widget to be called again. Consider converting StatelessWidget to StatefulWidget and add your http call method in

@overridde 
initState() {
    your code
}

Solution 2: Fathah Cr

I had the same issue and solved using try catch

Future<http.Response> fetchPost() async{
try{
return await http.get('https://api.npoint.io/8c7aafe809d73af5f2b9');
}
catch (e) {
   print(e);
}

  }