飞镖表单，使用TextInputActions

Question

我实现了Firebase Flutter登录，并从here中获取了代码。

class _EmailPasswordFormState extends State<_EmailPasswordForm> {
  final GlobalKey<FormState> _formKey = GlobalKey<FormState>();
  final TextEditingController _emailController = TextEditingController();
  final TextEditingController _passwordController = TextEditingController();
  bool _success;
  String _userEmail;
  @override
  Widget build(BuildContext context) {
    return Form(
      key: _formKey,
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: <Widget>[
          Container(
            child: const Text('Test sign in with email and password'),
            padding: const EdgeInsets.all(16),
            alignment: Alignment.center,
          ),
          TextFormField(
            controller: _emailController,
            decoration: const InputDecoration(labelText: 'Email'),
            validator: (String value) {
              if (value.isEmpty) {
                return 'Please enter some text';
              }
              return null;
            },
          ),
          TextFormField(
            controller: _passwordController,
            decoration: const InputDecoration(labelText: 'Password'),
            validator: (String value) {
              if (value.isEmpty) {
                return 'Please enter some text';
              }
              return null;
            },
          ),
          Container(
            padding: const EdgeInsets.symmetric(vertical: 16.0),
            alignment: Alignment.center,
            child: RaisedButton(
              onPressed: () async {
                if (_formKey.currentState.validate()) {
                  _signInWithEmailAndPassword();
                }
              },
              child: const Text('Submit'),
            ),
          ),
          Container(
            alignment: Alignment.center,
            padding: const EdgeInsets.symmetric(horizontal: 16),
            child: Text(
              _success == null
                  ? ''
                  : (_success
                      ? 'Successfully signed in ' + _userEmail
                      : 'Sign in failed'),
              style: TextStyle(color: Colors.red),
            ),
          )
        ],
      ),
    );
  }

我在两个textInputAction: TextInputAction.next中添加了textInputAction: TextInputAction.go和TextFormField。键盘上的设计正在更改，但是单击时什么也没有发生。我希望在单击第二个TextFormField中的“ go”时，在第一个TextFormField中出现“ next”按钮后，按下提交按钮。

我需要实现什么？谢谢！