在flutter中使用sqflite点击按钮时，如何显示数据库的记录？

import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
import 'package:path/path.dart';

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

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  List<Map<String, dynamic>> _records = [];

  @override
  void initState() {
    super.initState();
    _loadRecordsFromDatabase();
  }

  Future<void> _loadRecordsFromDatabase() async {
    // 创建数据库
    final database = openDatabase(
      join(await getDatabasesPath(), 'my_database.db'),
      onCreate: (db, version) {
        // 创建数据表
        return db.execute(
          'CREATE TABLE records(id INTEGER PRIMARY KEY, name TEXT)',
        );
      },
      version: 1,
    );

    // 查询数据库记录
    final List<Map<String, dynamic>> records = await database.then((db) {
      return db.query('records');
    });

    setState(() {
      _records = records;
    });
  }

  Future<void> _addRecordToDatabase() async {
    // 创建数据库
    final database = openDatabase(
      join(await getDatabasesPath(), 'my_database.db'),
      version: 1,
    );

    // 插入数据库记录
    await database.then((db) {
      return db.insert(
        'records',
        {'name': 'New Record'},
        conflictAlgorithm: ConflictAlgorithm.replace,
      );
    });

    // 重新加载数据库记录
    await _loadRecordsFromDatabase();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: ListView.builder(
        itemCount: _records.length,
        itemBuilder: (context, index) {
          return ListTile(
            title: Text(_records[index]['name']),
          );
        },
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _addRecordToDatabase,
        tooltip: 'Add Record',
        child: Icon(Icons.add),
      ),
    );
  }
}

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