如何在ListView中只显示布尔值为true的QuerySnapshots？(省道/颤动)

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

class MyListView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return 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();
        }

        // 创建一个新的列表，用于存储布尔值为true的QuerySnapshots
        List<QueryDocumentSnapshot> trueSnapshots = [];

        // 遍历所有的QuerySnapshots，判断其中的布尔值是否为true
        for (QueryDocumentSnapshot document in snapshot.data.docs) {
          bool value = document.data()['your_boolean_field'];
          if (value == true) {
            trueSnapshots.add(document);
          }
        }

        // 将新的列表作为数据源，绑定到ListView上
        return ListView.builder(
          itemCount: trueSnapshots.length,
          itemBuilder: (BuildContext context, int index) {
            return ListTile(
              title: Text(trueSnapshots[index].data()['your_title_field']),
              subtitle: Text(trueSnapshots[index].data()['your_subtitle_field']),
            );
          },
        );
      },
    );
  }
}