如何在Flutter中使用api中的双精度值？

dependencies:
  http: ^0.13.3

import 'package:http/http.dart' as http;

Future<double> fetchDoubleValue() async {
  final response = await http.get(Uri.parse('https://api.example.com/value'));
  if (response.statusCode == 200) {
    final doubleValue = double.parse(response.body);
    return doubleValue;
  } else {
    throw Exception('Failed to fetch double value');
  }
}

import 'package:flutter/material.dart';

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FutureBuilder<double>(
      future: fetchDoubleValue(),
      builder: (context, snapshot) {
        if (snapshot.hasData) {
          final doubleValue = snapshot.data;
          return Text('Double Value: $doubleValue');
        } else if (snapshot.hasError) {
          return Text('Error: ${snapshot.error}');
        }
        return CircularProgressIndicator();
      },
    );
  }
}