将firebase连接到我的TextField/Material登录页面代码

dependencies:
  firebase_core: ^1.0.0
  firebase_auth: ^1.0.0
  cloud_firestore: ^2.0.0

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

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

final FirebaseAuth _auth = FirebaseAuth.instance;

Future<UserCredential> signIn(String email, String password) async {
  try {
    UserCredential userCredential = await _auth.signInWithEmailAndPassword(
      email: email,
      password: password,
    );
    return userCredential;
  } catch (e) {
    print(e.toString());
    return null;
  }
}

String email;
String password;

TextField(
  onChanged: (value) {
    email = value;
  },
  decoration: InputDecoration(
    hintText: 'Email',
  ),
),
TextField(
  onChanged: (value) {
    password = value;
  },
  decoration: InputDecoration(
    hintText: 'Password',
  ),
),
ElevatedButton(
  onPressed: () {
    signIn(email, password).then((userCredential) {
      // 登录成功后的操作
    }).catchError((error) {
      // 处理登录错误
    });
  },
  child: Text('Sign In'),
),