我想使用streambuilder()，只从firestore中的服务器获取数据。

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

class FirestoreDataScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Firestore Data'),
      ),
      body: StreamBuilder<QuerySnapshot>(
        stream: FirebaseFirestore.instance.collection('your_collection').snapshots(),
        builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
          if (snapshot.hasError) {
            return Text('Error: ${snapshot.error}');
          }

          if (snapshot.connectionState == ConnectionState.waiting) {
            return CircularProgressIndicator();
          }

          return ListView(
            children: snapshot.data.docs.map((DocumentSnapshot document) {
              // 按需访问文档字段
              final data = document.data();
              final id = document.id;
              
              return ListTile(
                title: Text(data['title']),
                subtitle: Text('Document ID: $id'),
              );
            }).toList(),
          );
        },
      ),
    );
  }
}