Disable And Enable Checkbox Using Flutter Android App

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      home: DisableEnableCheckbox(),
    );
  }
}
class DisableEnableCheckbox extends StatefulWidget {
  @override
  _DisableEnableCheckboxState createState() => _DisableEnableCheckboxState();
}

class _DisableEnableCheckboxState extends State<DisableEnableCheckbox> {
  bool _isChecked = true;
  bool _isEnabled = true;

  _onChanged() {
    setState(() {
      _isEnabled = !_isEnabled;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Colors.indigo,
        title: Text("Disable & Enable Checkbox"),
      ),
      body: Column(
        children: <Widget>[
          Expanded(
            child: Center(
              child: CheckboxListTile(
                title: Text("Checkbox Text"),
                value: _isChecked,
                onChanged: _isEnabled
                    ? (val) {
                  setState(() {
                    _isChecked = val;
                  });
                }
                    : null,
              ),
            ),
          ),
          Expanded(
            child: Center(
              child: RaisedButton(
                onPressed: _onChanged,
                child: Text(_isEnabled ? "Disable" : "Enable",style: TextStyle(
                  color: Colors.white
                ),),
                color: Colors.indigo,
              ),
            ),
          ),
        ],
      ),
    );
  }
}