How To Disable Text Field Using Flutter Android Dart

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> {
  TextEditingController _textFieldController = TextEditingController();
  bool _isEnabled = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.orange,
        title: Text('Disable TextField'),
      ),
      body: Center(
        child: Column(
          children: <Widget>[
            Expanded(
              child: Center(
                child: Padding(
                  padding: EdgeInsets.symmetric(horizontal: 25.0),
                  child: TextField(
                    controller: _textFieldController,
                    enabled: _isEnabled,
                    decoration: InputDecoration(hintText: "TextField"),
                  ),
                ),
              ),
            ),
            RaisedButton(
              onPressed: () => setState(() => _isEnabled = !_isEnabled),
              child: Text(_isEnabled ? "Disable" : "Enable"),
              color: Colors.orange,
              textColor: Colors.white,
            ),
            SizedBox(height: 12.0),
          ],
        ),
      ),
    );
  }
}