无法在 Flutter 中使用 Firebase Auth 进行注册

Posted 2023-02-23

【中文标题】无法在 Flutter 中使用 Firebase Auth 进行注册

【英文标题】：Unable to sign up using Firebase Auth in Flutter

【发布时间】：2020-08-27 05:49:55

【问题描述】：

我在我的应用程序中使用 Firebase，我已正确设置所有内容，并且 Firebase Firestore 正常工作，我能够在那里读取和写入数据，但是当我尝试在 Firebase 中创建用户时，我收到了这条消息在调试控制台中：

I/BiChannelGoogleApi( 2228): [FirebaseAuth: ] getGoogleApiForMethod() returned Gms: com.google.firebase.auth.api.internal.zzaq@fc008c3
W/DynamiteModule( 2228): Local module descriptor class for com.google.firebase.auth not found.
I/FirebaseAuth( 2228): [FirebaseAuth:] Preparing to create service connection to gms implementation
I/lutter_firebase( 2228): type=1400 audit(0.0:1201): avc: denied  sendto  for path="/dev/socket/logdw" scontext=u:r:untrusted_app:s0:c512,c768 tcontext=u:r:init:s0 tclass=unix_dgram_socket permissive=1
E/GmsClientSupervisor( 2228): Timeout waiting for ServiceConnection callback com.google.firebase.auth.api.gms.service.START
E/GmsClientSupervisor( 2228): java.lang.Exception
E/GmsClientSupervisor( 2228):   at com.google.android.gms.common.internal.zze.handleMessage(Unknown Source:53)
E/GmsClientSupervisor( 2228):   at android.os.Handler.dispatchMessage(Handler.java:101)
E/GmsClientSupervisor( 2228):   at com.google.android.gms.internal.common.zze.dispatchMessage(Unknown Source:8)
E/GmsClientSupervisor( 2228):   at android.os.Looper.loop(Looper.java:164)
E/GmsClientSupervisor( 2228):   at android.app.ActivityThread.main(ActivityThread.java:6541)
E/GmsClientSupervisor( 2228):   at java.lang.reflect.Method.invoke(Native Method)
E/GmsClientSupervisor( 2228):   at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
E/GmsClientSupervisor( 2228):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
W/DynamiteModule( 2228): Local module descriptor class for com.google.firebase.auth not found.
I/FirebaseAuth( 2228): [FirebaseAuth:] Preparing to create service connection to gms implementation

这是pubspec.yaml 文件：

name: chat_app_flutter_firebase
description: A new Flutter project.

version: 1.0.0+1

environment:
  sdk: ">=2.3.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^0.1.2
  cloud_firestore: ^0.13.5
  firebase_auth: ^0.16.0


dev_dependencies:
  flutter_test:
    sdk: flutter

flutter:

  uses-material-design: true

auth_screen.dart

import 'package:flutter/material.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/services.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

import '../widgets/auth/auth_form.dart';

class AuthScreen extends StatefulWidget 
  @override
  _AuthScreenState createState() => _AuthScreenState();


class _AuthScreenState extends State<AuthScreen> 
  final _auth = FirebaseAuth.instance;
  var _isLoading = false;

  void _submitAuthForm(
    String email,
    String password,
    String username,
    bool isLogin,
    BuildContext ctx,
  ) async 
    AuthResult authResult;

    try 
      setState(() 
        _isLoading = true;
      );
      if (isLogin) 
        authResult = await _auth.signInWithEmailAndPassword(
          email: email,
          password: password,
        );
       else 
        authResult = await _auth.createUserWithEmailAndPassword(
          email: email,
          password: password,
        );
        await Firestore.instance
            .collection('users')
            .document(authResult.user.uid)
            .setData(
          'username': username,
          'email': email,
        );
      
     on PlatformException catch (err) 
      var message = 'An error occurred, pelase check your credentials!';

      if (err.message != null) 
        message = err.message;
      

      Scaffold.of(ctx).showSnackBar(
        SnackBar(
          content: Text(message),
          backgroundColor: Theme.of(ctx).errorColor,
        ),
      );
      setState(() 
        _isLoading = false;
      );
     catch (err) 
      print(err);
      setState(() 
        _isLoading = false;
      );
    
  

  @override
  Widget build(BuildContext context) 
    return Scaffold(
      backgroundColor: Theme.of(context).primaryColor,
      body: AuthForm(
        _submitAuthForm,
        _isLoading,
      ),
    );
  

auth_form.dart

import 'package:flutter/material.dart';

class AuthForm extends StatefulWidget 
  AuthForm(
    this.submitFn,
    this.isLoading,
  );

  final bool isLoading;
  final void Function(
    String email,
    String password,
    String userName,
    bool isLogin,
    BuildContext ctx,
  ) submitFn;

  @override
  _AuthFormState createState() => _AuthFormState();


class _AuthFormState extends State<AuthForm> 
  final _formKey = GlobalKey<FormState>();
  var _isLogin = true;
  var _userEmail = '';
  var _userName = '';
  var _userPassword = '';

  void _trySubmit() 
    final isValid = _formKey.currentState.validate();
    FocusScope.of(context).unfocus();

    if (isValid) 
      _formKey.currentState.save();
      widget.submitFn(_userEmail.trim(), _userPassword.trim(), _userName.trim(),
          _isLogin, context);
    
  

  @override
  Widget build(BuildContext context) 
    return Center(
      child: Card(
        margin: EdgeInsets.all(20),
        child: SingleChildScrollView(
          child: Padding(
            padding: EdgeInsets.all(16),
            child: Form(
              key: _formKey,
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: <Widget>[
                  TextFormField(
                    key: ValueKey('email'),
                    validator: (value) 
                      if (value.isEmpty || !value.contains('@')) 
                        return 'Please enter a valid email address.';
                      
                      return null;
                    ,
                    keyboardType: TextInputType.emailAddress,
                    decoration: InputDecoration(
                      labelText: 'Email address',
                    ),
                    onSaved: (value) 
                      _userEmail = value;
                    ,
                  ),
                  if (!_isLogin)
                    TextFormField(
                      key: ValueKey('username'),
                      validator: (value) 
                        if (value.isEmpty || value.length < 4) 
                          return 'Please enter at least 4 characters';
                        
                        return null;
                      ,
                      decoration: InputDecoration(labelText: 'Username'),
                      onSaved: (value) 
                        _userName = value;
                      ,
                    ),
                  TextFormField(
                    key: ValueKey('password'),
                    validator: (value) 
                      if (value.isEmpty || value.length < 7) 
                        return 'Password must be at least 7 characters long.';
                      
                      return null;
                    ,
                    decoration: InputDecoration(labelText: 'Password'),
                    obscureText: true,
                    onSaved: (value) 
                      _userPassword = value;
                    ,
                  ),
                  SizedBox(height: 12),
                  if (widget.isLoading) CircularProgressIndicator(),
                  if (!widget.isLoading)
                    RaisedButton(
                      child: Text(_isLogin ? 'Login' : 'Signup'),
                      onPressed: _trySubmit,
                    ),
                  if (!widget.isLoading)
                    FlatButton(
                      textColor: Theme.of(context).primaryColor,
                      child: Text(_isLogin
                          ? 'Create new account'
                          : 'I already have an account'),
                      onPressed: () 
                        setState(() 
                          _isLogin = !_isLogin;
                        );
                      ,
                    )
                ],
              ),
            ),
          ),
        ),
      ),
    );
  

我之前曾使用较旧的 Flutter SDK 开发过类似的应用程序，并且一切正常。

当前 Flutter SDK 信息：

Flutter 1.17.0 • 频道稳定 • https://github.com/flutter/flutter.git 框架 • 修订版 e6b34c2b5c（9 天前） • 2020-05-02 11:39:18 -0700 , 引擎 • 修订版 540786dd51 工具• Dart 2.8.1

GitHub 存储库：GitHub Repo

任何帮助将不胜感激??????

【问题讨论】：

你能使用这个依赖 firebase_auth: ^0.16.0 吗？让我知道它是否有效，另外，请重新启动应用程序

我希望这对你有用还是还在苦苦挣扎？

我试过了，可惜还是不行。

如果您修改了任何内容，请检查 Firebase 身份验证规则。

【参考方案1】：

问题出在我的模拟器上，在物理设备上运行它并运行。

我使用的是 Genymotion 模拟器，它没有安装 Play Store，所以我使用 GApps 安装了它们，这也解决了模拟器的问题。

此外，使用具有 Play 商店服务的 Android Studio 模拟器也可以解决问题。