使用flutter从firebase的子集读取或检索数据列表

import 'package:cloud_firestore/cloud_firestore.dart';

Future<List<DocumentSnapshot>> fetchData() async {
  QuerySnapshot querySnapshot =
      await FirebaseFirestore.instance.collection('your_collection').get();
  return querySnapshot.docs;
}

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

class DataListWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FutureBuilder<List<DocumentSnapshot>>(
      future: fetchData(),
      builder: (BuildContext context, AsyncSnapshot<List<DocumentSnapshot>> snapshot) {
        if (snapshot.connectionState == ConnectionState.waiting) {
          return CircularProgressIndicator();
        } else {
          if (snapshot.hasError) {
            return Text('Error: ${snapshot.error}');
          } else {
            List<DocumentSnapshot> data = snapshot.data;
            return ListView.builder(
              itemCount: data.length,
              itemBuilder: (BuildContext context, int index) {
                return ListTile(
                  title: Text(data[index].data()['title']),
                  subtitle: Text(data[index].data()['description']),
                );
              },
            );
          }
        }
      },
    );
  }
}