如何在Flutter中从StorageReference获取fileType

dependencies:
  firebase_storage: ^8.0.0

import 'package:firebase_storage/firebase_storage.dart';

StorageReference storageRef = FirebaseStorage.instance.ref('path/to/file.jpg');

StorageMetadata metadata = await storageRef.getMetadata();
String fileType = metadata.contentType;

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

class FileTypePage extends StatefulWidget {
  @override
  _FileTypePageState createState() => _FileTypePageState();
}

class _FileTypePageState extends State<FileTypePage> {
  String fileType = '';

  @override
  void initState() {
    super.initState();
    getFileType();
  }

  Future<void> getFileType() async {
    StorageReference storageRef = FirebaseStorage.instance.ref('path/to/file.jpg');
    StorageMetadata metadata = await storageRef.getMetadata();
    setState(() {
      fileType = metadata.contentType;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('File Type'),
      ),
      body: Center(
        child: Text('File Type: $fileType'),
      ),
    );
  }
}