Pin Entry Input Text Field Using Flutter Android App

dependencies:
  flutter:
    sdk: flutter
  pin_entry_text_field: ^0.1.4

flutter pub get

import 'package:pin_entry_text_field/pin_entry_text_field.dart';

PinEntryTextField(
  showFieldAsBox: true,
  onSubmit: (String pin){
    showDialog(
        context: context,
        builder: (context){
          return AlertDialog(
            title: Text("Pin"),
            content: Text('Pin entered is $pin'),
          );
        }
    ); //end showDialog()
  }, // end onSubmit
),

import 'package:flutter/material.dart';
import 'package:pin_entry_text_field/pin_entry_text_field.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        debugShowCheckedModeBanner: false,
        home: Scaffold(
            body: Center(
                child: PinEntry()
            )
        )
    );
  }
}

class PinEntry extends StatelessWidget {

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.lightGreen,
        title: Text("Pin Entry Example"),
      ),
      body: Container(
        child: Padding(
          padding: const EdgeInsets.all(8.0),
          child: Center(
            child: PinEntryTextField(
              showFieldAsBox: true,
              onSubmit: (String pin){
                showDialog(
                    context: context,
                    builder: (context){
                      return AlertDialog(
                        title: Text("Pin"),
                        content: Text('Pin entered is $pin'),
                      );
                    }
                ); 
              }, 
            ),
          ),
        ), 
      ), 
    );
  }
}