Flutter Stepper Widget

This Article is posted by seven.srikanth at 28-09-2018 18:48:12


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.
The final output of this program is going to look as below.
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Below is how you add stepper widget to your project.
new Stepper(steps: spr, type: StepperType.vertical, currentStep: _currentstep, onStepContinue: _movetonext, onStepCancel: _movetostart,
onStepTapped: _showcontent,)
_currentStep is an integer which will hold index of active step.
_movetonext, _movetostart, _showcontent are the functions that will perform the navigation and showing the dialog box. 
Here is the full code from main.dart file. All you need to copy paste the below code in your main.dart file and run it to see the output.
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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),
];
##FlutterCentralAds## Hope this is helpful. Please add your comments.

You can also read my new article on Flutter Stepper Widget - Change State in Response to Input

Thanks,
Srikanth

Tags: Flutter Stepper Widget; Sequence of Steps in Mobile App;



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