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main.dart
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main.dart
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import 'package:flutter/material.dart';
import 'package:code_fields/code_fields.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
final formKey = GlobalKey<FormState>();
final int codeLength = 4;
String validateCode(String code){
if(code.length < codeLength) return "Please complete the code";
else{
bool isNumeric = int.tryParse(code) != null;
if(!isNumeric) return "Please enter a valid code";
}
return null;
}
void onButtonPressed() {
if(formKey.currentState.validate()){
formKey.currentState.save();
}
}
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
appBar: AppBar(
title: Text("CodeFields example"),
),
body: Padding(
padding: const EdgeInsets.all(24.0),
child: Form(
key: formKey,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
CodeFields(
length: codeLength,
validator: validateCode,
inputDecoration: InputDecoration(
filled: true,
fillColor: Colors.grey.withOpacity(0.2),
enabledBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(24.0),
borderSide: BorderSide(color: Colors.transparent)
),
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(24.0),
),
),
),
SizedBox(height: 32.0,),
SizedBox(
width: double.infinity,
child: FlatButton(
child: Text(
"Validate code",
style: TextStyle(
color: Colors.white,
),
),
height: 56.0,
color: Theme.of(context).primaryColor,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(24.0),
),
onPressed: onButtonPressed,
),
),
],
),
),
)
),
);
}
}