How To Show And Hide Text Field Input Using Flutter

import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  MyHomePageState createState() {
    return new MyHomePageState();
  }
}

class MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
  TextEditingController _textFieldController = TextEditingController();
  bool _isTextFieldVisible = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.pink,
        title: Text('Show and Hide - TextField'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          mainAxisSize: MainAxisSize.max,
          children: <Widget>[
            _isTextFieldVisible
                ? Padding(
              //Add padding around textfield
              padding: EdgeInsets.symmetric(horizontal: 25.0),
              child: TextField(
                controller: _textFieldController,
                decoration: InputDecoration(
                  hintText: "Enter Username",
                ),
              ),
            )
                : SizedBox(),
            SizedBox(
              height: 25.0,
            ),
            RaisedButton(
              color: Colors.pink,
              textColor: Colors.white,
              child: Text(_isTextFieldVisible ? "Hide" : "Show"),
              onPressed: () {
                setState(() => _isTextFieldVisible = !_isTextFieldVisible);
              },
            ),
          ],
        ),
      ),
    );
  }
}