Flutter 侧面表单中的flatterfirebase身份验证问题

您好，我正在尝试在firebase上构建一个带有Flitter集成的身份验证系统。我已经正确地集成了所有firebase类exc。在我的注册页面中，我声明了firebase的授权人使用的字符串email

      class _RegisterState extends State<Register> {
      String = email;

错误：

 I/flutter ( 3037): Error: 'package:firebase_auth/src/firebase_auth.dart': Failed assertion: line 174 
 pos 12: 'email != null': is not true.

---

这里您还没有保存表单状态，所以首先将表单状态保存为

void validateAndSubmit() async {

String userId = "";

_formKey2.currentState.save();

try {
  if (_isLoginForm) {
    userId = await widget.auth.signIn(email, _password);
    print('Signed in: $userId');
  } else {
    userId = await widget.auth.signUp(email, _password);
    //widget.auth.sendEmailVerification();
    //_showVerifyEmailSentDialog();
    print('Signed up user: $userId');
  }
  setState(() {
    _isLoading = false;
  });

  if (userId.length > 0 && userId != null && _isLoginForm) {
    widget.loginCallback();
  }
}catch (e) {
  print('Error: $e');
  setState(() {
    _isLoading = false;
    _errorMessage = e.message;
    _formKey2.currentState.reset();
  });
}


 }

---

请添加

validateAndSubmit

函数。刚刚添加了@HemanthRaj

 I/flutter ( 3037): Error: 'package:firebase_auth/src/firebase_auth.dart': Failed assertion: line 174 
 pos 12: 'email != null': is not true.

void validateAndSubmit() async {

String userId = "";

_formKey2.currentState.save();

try {
  if (_isLoginForm) {
    userId = await widget.auth.signIn(email, _password);
    print('Signed in: $userId');
  } else {
    userId = await widget.auth.signUp(email, _password);
    //widget.auth.sendEmailVerification();
    //_showVerifyEmailSentDialog();
    print('Signed up user: $userId');
  }
  setState(() {
    _isLoading = false;
  });

  if (userId.length > 0 && userId != null && _isLoginForm) {
    widget.loginCallback();
  }
}catch (e) {
  print('Error: $e');
  setState(() {
    _isLoading = false;
    _errorMessage = e.message;
    _formKey2.currentState.reset();
  });
}


 }