我想在一个文本字段上进行搜索，它显示在CloudFirestore上进行搜索的结果。这段代码在我打印时提供了结果。我如何在界面上显示它？此外，我应该说，当我尝试方法arrayContains时，为了基于字符串的一部分获得结果，我的打印不起作用，只能打印整个字符串（isEqualTo）。

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

void main ()async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();

  runApp(MaterialApp(
    home: Home(),

  ));
}

class Home extends StatefulWidget {
  const Home({Key? key}) : super(key: key);

  @override
  State<Home> createState() => _HomeState();
}
class _HomeState extends State<Home> {
  TextEditingController _controllerField = TextEditingController();

  final CollectionReference _materias =
  FirebaseFirestore.instance.collection('materias');
List searchResult = [];

   searchFF(String query) async{
    final result = await FirebaseFirestore.instance
        .collection('materias')
        .where('unidades_tematicas',
     isEqualTo: query).get();

setState(() {
  searchResult = result.docs.map((x) => x.data()).toList();
  print(searchResult);
});
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text("BNCC - Matemática"),
          centerTitle: true,
          backgroundColor: Colors.green,
        ),
        body:
        Column(
            children: [
              TextField(
                controller: _controllerField,
                decoration: InputDecoration(
                  border: OutlineInputBorder(),
                  hintText: "Buscar"
                ),
                onChanged: (query) {
                  searchFF(query);
                },
              ),

              StreamBuilder(
                stream: _materias.snapshots(),
                builder: (context,
                    AsyncSnapshot<QuerySnapshot> streamSnapshot) {
                  if (streamSnapshot.hasData) {

                       return
                          Expanded(child:
                          ListView.builder(
                      scrollDirection: Axis.vertical,
                        shrinkWrap: true,
                        itemCount: streamSnapshot.data!.docs.length,

                        itemBuilder: (context, indice) {
                          DocumentSnapshot documentSnapshot =
                          streamSnapshot.data!.docs[indice];
                          return Column(
                            children: [
                              ListTile(
                                title: Text(
                                    documentSnapshot['unidades_tematicas']),
                                subtitle: Text(documentSnapshot['habilidades']),
                              )
                              ],

                          );
                        }));
                  }
                  return Container(
                  );
                },
              )
            ]
        )
    );
  }
}

界面如下所示：