Hide And Show Radio Button Using Flutter Android App

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

void main(){
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    SystemChrome.setPreferredOrientations([
      DeviceOrientation.portraitUp
    ]);
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Animation Playground',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: ShowHideRadio(),
    );
  }
}

class ShowHideRadio extends StatefulWidget {
  @override
  _ShowHideRadioState createState() => _ShowHideRadioState();
}

class _ShowHideRadioState extends State<ShowHideRadio> {
  bool _isRadioChecked = true;
  int _currValue = 1;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.cyan,
        title: Text("Hide & Show Radio Button"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.start,
          mainAxisSize: MainAxisSize.max,
          children: <Widget>[
            _isRadioChecked
                ? RadioListTile(
              activeColor: Colors.cyan,
              groupValue: _currValue,
              value: 1,
              onChanged: (val) => setState(() => _currValue = val),
              title: Text("Radio Button Text"),
            )
                : SizedBox(),
            SizedBox(height: 30.0),
            RaisedButton(
              color: Colors.cyan,
              child: Text(_isRadioChecked ? "Hide" : "Show",style: TextStyle(color: Colors.white),),
              onPressed: () {
                setState(() => _isRadioChecked = !_isRadioChecked);
              },
            ),
          ],
        ),
      ),
    );
  }
}