如何从Firebase获取图像/文件列表？[副本]

Question

你好，我试图从Firebase bucket/存储中获取一个图像列表，但调用runApp（）时总是得到一个错误代码。下面是与我的问题对应的代码和错误消息。我将非常感谢任何帮助。我试着按照错误消息的建议去做，但最终还是出现了问题。

import 'package:authorize_user/Screens/image_screen.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';

void main() {
  Firebase.initializeApp();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Images',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: ImageScreen(),
    );
  }
}

class ImageScreen extends StatelessWidget {
  Stream<QuerySnapshot> getDocuments() {
    return FirebaseFirestore.instance
            .collection('Accounts/ZqEbRkLFbW34CXKybmr7/images')
            .snapshots();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: StreamBuilder<QuerySnapshot>(
        stream: getDocuments(),
        builder: (context, streamSnapshots) {
          if (streamSnapshots.connectionState == ConnectionState.waiting) {
            return Center(child: CircularProgressIndicator());
          }
          final documents = streamSnapshots.data.docs;
          return ListView.builder(
            itemCount: streamSnapshots.data.docs.length,
            itemBuilder: (context, index) => Container(
              padding: EdgeInsets.all(8),
              child: Text(documents[index].data().length.toString()),
            ),
          );
        },
      ),
      floatingActionButton:
          FloatingActionButton(child:Icon(Icons.add), onPressed: () {}),
    );
  }
}

错误消息：

Answer 1

在main()中调用FireBase.InitializeApp（）；之前，需要运行WidgetsFlutterBinding.EnsureInitialized()；EnsureInitialized()；

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}