Flutter:如何将Future<dynamic>转换为贴图

import 'dart:async';
import 'package:flutter/material.dart';

// 异步任务，模拟获取贴图的操作
Future<dynamic> fetchImage() async {
  // 假设在这里进行异步任务，例如从服务器获取贴图数据
  await Future.delayed(Duration(seconds: 2));

  // 返回贴图的URL或者贴图本身的数据
  return 'https://example.com/image.jpg';
}

// 将Future<dynamic>转换为贴图
class ImageScreen extends StatefulWidget {
  @override
  _ImageScreenState createState() => _ImageScreenState();
}

class _ImageScreenState extends State<ImageScreen> {
  Future<dynamic> _imageFuture;
  Image _image;

  @override
  void initState() {
    super.initState();
    _imageFuture = fetchImage();
    _image = Image.asset('loading.gif'); // 初始状态显示加载中的图像
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Image Screen'),
      ),
      body: Center(
        child: FutureBuilder(
          future: _imageFuture,
          builder: (BuildContext context, AsyncSnapshot<dynamic> snapshot) {
            if (snapshot.connectionState == ConnectionState.waiting) {
              return CircularProgressIndicator(); // 加载中的进度指示器
            }
            if (snapshot.hasData) {
              String imageUrl = snapshot.data;

              // 使用转换后的贴图数据创建Image对象
              _image = Image.network(imageUrl);
            }
            return _image;
          },
        ),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: ImageScreen(),
  ));
}