Flutter Stepper Widget

In this post, I'm going to show you how to use Stepper Widget in your Mobile app. Stepper Widget will help you to progress through a sequence of Steps.

import 'package:flutter/material.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(),
      home: new MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _currentstep = 0;

  void _movetonext() {
    setState(() {
      _currentstep++;
    });
  }

  void _movetostart() {
    setState(() {
      _currentstep = 0;
    });
  }

  void _showcontent(int s) {
    showDialog<Null>(
      context: context,

      barrierDismissible: false, // user must tap button!

      builder: (BuildContext context) {
        return new AlertDialog(
          title: new Text('You clicked on'),
          content: new SingleChildScrollView(
            child: new ListBody(
              children: <Widget>[
                spr[s].title,
                spr[s].subtitle,
              ],
            ),
          ),
          actions: <Widget>[
            new FlatButton(
              child: new Text('Ok'),
              onPressed: () {
                Navigator.of(context).pop();
              },
            ),
          ],
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        appBar: new AppBar(
          title: new Text(widget.title),
        ),
        body: new Container(
            child: new Stepper(
          steps: spr,
          type: StepperType.vertical,
          currentStep: _currentstep,
          onStepContinue: _movetonext,
          onStepCancel: _movetostart,
          onStepTapped: _showcontent,
        )));
  }
}

const List<Step> spr = <Step>[
  // const Step( title:  ,'SubTitle1', 'This is Content', state: StepState.indexed, true)

  Step(
      title: const Text('Hello1'),
      subtitle: Text('SubTitle1'),
      content: const Text('This is Content1'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello2'),
      subtitle: Text('SubTitle2'),
      content: const Text('This is Content2'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello3'),
      subtitle: Text('SubTitle3'),
      content: const Text('This is Content3'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello4'),
      subtitle: Text('SubTitle4'),
      content: const Text('This is Content4'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello5'),
      subtitle: Text('SubTitle5'),
      content: const Text('This is Content5'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello6'),
      subtitle: Text('SubTitle6'),
      content: const Text('This is Content6'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello7'),
      subtitle: Text('SubTitle7'),
      content: const Text('This is Content7'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello8'),
      subtitle: Text('SubTitle8'),
      content: const Text('This is Content8'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello9'),
      subtitle: Text('SubTitle9'),
      content: const Text('This is Content9'),
      state: StepState.indexed,
      isActive: true),

  Step(
      title: const Text('Hello10'),
      subtitle: Text('SubTitle10'),
      content: const Text('This is Content10'),
      state: StepState.indexed,
      isActive: true),
];