您可以尝试使用参数传递参数，并使用命名的路由调用将其发送到导航器，请参见烹饪书上的示例：

https://flutter.dev/docs/cookbook/navigation/navigate-with-arguments

1）在第二个屏幕中，您必须像这样创建ScreenArguments类：

class ScreenArguments {
  final String email;
  final String password;

  ScreenArguments(this.email,this.password);
}

2）在第二个屏幕本身上启动var：

  String email;
  String password;

3）从第一个屏幕上的按钮（例如）调用导航器，发送值：

Navigator.pushNamed(context,"/secondScreen",arguments: email,password)

*将命名路由添加到您的main.dart中，以使其起作用。

4）使用从screen1发送到screen2的值。

希望有帮助。

您也可以尝试使用soapType，以连续的步骤以“向导”的形式收集电子邮件，密码等。有很多变体（Google“步进器小部件”）。

这是一个非常基本的设置，其中添加了TextFormField，您可以使用并将验证添加到：

import 'package:flutter/material.dart';

class StepperForm extends StatefulWidget {
  static Future<void> show(BuildContext context) async {}

  @override
  _StepperFormState createState() => _StepperFormState();
}

class _StepperFormState extends State<StepperForm> {
  ///Stepper variables and functions
  //declare the currentStep (starting point) as an int 0
  int _currentStep = 0;

  //Create a list of steps. Use TextFormFields for the email/password. Add validation if needed.
  List<Step> _myStepperForm() {
    List<Step> _steps = [
      Step(
        title: Text("Enter Your Email"),//state: StepState.complete,isActive: _currentStep >= 0,content: TextFormField(
          decoration: InputDecoration(
            labelText: 'Email',suffixIcon: Icon(Icons.email),border: OutlineInputBorder(
              borderRadius: BorderRadius.circular(10),),validator: (value) =>
          value.isNotEmpty ? null : 'email can\'t be empty',//Additional validation code as needed
        ),Step(
        title: Text("Second"),isActive: _currentStep >= 1,content: Text("My Second Example"),Step(
        title: Text("Third"),isActive: _currentStep >= 2,content: Text("My Third Example"),Step(
        title: Text("Fourth"),isActive: _currentStep >= 3,content: Text("My Fourth Example"),];
    return _steps;
  }

  //Create function for continue button
  onStepContinue() {
    setState(() {
      if (this._currentStep < this._myStepperForm().length - 1) {
        this._currentStep = this._currentStep + 1;
      } else {
        //Completion Code
        print('The form is complete.');
      }
    });
  }

  //create cancel function
  onStepCancel() {
    setState(() {
      if (this._currentStep > 0) {
        this._currentStep = this._currentStep - 1;
      } else {
        this._currentStep = 0;
      }
    });
  }

  //Create the Stepper Widget
  Widget _stepperWidget() => Container(
        margin: EdgeInsets.only(top: 10),color: Colors.orangeAccent,child: Stepper(
          //type: StepperType.horizontal,currentStep: this._currentStep,steps: _myStepperForm(),onStepCancel: onStepCancel,onStepContinue: onStepContinue,onStepTapped: (step) {
            setState(() {
              this._currentStep = step;
            });
          },);

 //Call Stepper Function in Scaffold. SingleChildScrollView helps with different screen sizes 
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Stepper Form'),body: SingleChildScrollView(
        child: Column(
          children: <Widget>[
            _stepperWidget(),SizedBox(height: 600)
          ],);
  }
}