如何从flutter文档的firestore数组中获取数据？

import 'package:flutter/material.dart';
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_core/firebase_core.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Firestore Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Firestore Demo'),
      ),
      body: Center(
        child: FutureBuilder(
          future: getData(),
          builder: (context, snapshot) {
            if (snapshot.hasData) {
              List<dynamic> dataArray = snapshot.data;
              return ListView.builder(
                itemCount: dataArray.length,
                itemBuilder: (context, index) {
                  return ListTile(
                    title: Text(dataArray[index]),
                  );
                },
              );
            } else if (snapshot.hasError) {
              return Text('Error: ${snapshot.error}');
            } else {
              return CircularProgressIndicator();
            }
          },
        ),
      ),
    );
  }

  Future<List<dynamic>> getData() async {
    await Firebase.initializeApp();
    FirebaseFirestore firestore = FirebaseFirestore.instance;

    CollectionReference collectionRef = firestore.collection('your_collection');
    DocumentSnapshot docSnapshot = await collectionRef.doc('your_document').get();

    List<dynamic> dataArray = docSnapshot.data()['your_array_field'];
    return dataArray;
  }
}