如何在flutter中将复选框中的数据存储到Firebase

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

class CheckboxExample extends StatefulWidget {
  @override
  _CheckboxExampleState createState() => _CheckboxExampleState();
}

class _CheckboxExampleState extends State<CheckboxExample> {
  bool checkboxValue1 = false;
  bool checkboxValue2 = false;
  bool checkboxValue3 = false;

  final databaseReference = FirebaseDatabase.instance.reference();

  void updateData() {
    databaseReference.child('checkboxes').set({
      'checkbox1': checkboxValue1,
      'checkbox2': checkboxValue2,
      'checkbox3': checkboxValue3,
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Checkbox Example'),
      ),
      body: Column(
        children: [
          CheckboxListTile(
            title: Text('Checkbox 1'),
            value: checkboxValue1,
            onChanged: (value) {
              setState(() {
                checkboxValue1 = value;
                updateData();
              });
            },
          ),
          CheckboxListTile(
            title: Text('Checkbox 2'),
            value: checkboxValue2,
            onChanged: (value) {
              setState(() {
                checkboxValue2 = value;
                updateData();
              });
            },
          ),
          CheckboxListTile(
            title: Text('Checkbox 3'),
            value: checkboxValue3,
            onChanged: (value) {
              setState(() {
                checkboxValue3 = value;
                updateData();
              });
            },
          ),
        ],
      ),
    );
  }
}