Flutter:如何将反馈表单中的用户反馈发布到Firestore数据库

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

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

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

class FeedbackPage extends StatefulWidget {
  @override
  _FeedbackPageState createState() => _FeedbackPageState();
}

class _FeedbackPageState extends State<FeedbackPage> {
  final _formKey = GlobalKey<FormState>();
  final _nameController = TextEditingController();
  final _feedbackController = TextEditingController();

  Future<void> _submitForm() async {
    if (_formKey.currentState.validate()) {
      try {
        await FirebaseFirestore.instance.collection('feedback').add({
          'name': _nameController.text,
          'feedback': _feedbackController.text,
        });
        _nameController.clear();
        _feedbackController.clear();
        showDialog(
          context: context,
          builder: (BuildContext context) {
            return AlertDialog(
              title: Text('Success'),
              content: Text('Thank you for your feedback!'),
              actions: <Widget>[
                TextButton(
                  child: Text('OK'),
                  onPressed: () {
                    Navigator.of(context).pop();
                  },
                ),
              ],
            );
          },
        );
      } catch (e) {
        showDialog(
          context: context,
          builder: (BuildContext context) {
            return AlertDialog(
              title: Text('Error'),
              content: Text('Failed to submit feedback.'),
              actions: <Widget>[
                TextButton(
                  child: Text('OK'),
                  onPressed: () {
                    Navigator.of(context).pop();
                  },
                ),
              ],
            );
          },
        );
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Feedback Form'),
      ),
      body: Padding(
        padding: EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: Column(
            children: <Widget>[
              TextFormField(
                controller: _nameController,
                decoration: InputDecoration(
                  labelText: 'Name',
                ),
                validator: (value) {
                  if (value.isEmpty) {
                    return 'Please enter your name';
                  }
                  return null;
                },
              ),
              TextFormField(
                controller: _feedbackController,
                decoration: InputDecoration(
                  labelText: 'Feedback',
                ),
                validator: (value) {
                  if (value.isEmpty) {
                    return 'Please enter your feedback';
                  }
                  return null;
                },
              ),
              SizedBox(height: 16.0),
              ElevatedButton(
                onPressed: _submitForm,
                child: Text('Submit'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}