Checkbox({ @required bool value,<br />                  tristate: false,<br />                  onChanged, <br />                  activeColor, <br />                  checkColor, <br />                  materialTapTargetSize, <br />              })

 
import 'package:flutter/material.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(),
    );
  }
}
class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State>MyHomePage⁢ {
  bool _value = false;
  void _onChange(bool value)
  {
    setState(() {
      _value = value;
    });
  }
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Flutter Application"),
      ),
      body: new Container(
        padding: new EdgeInsets.all(32.0),
        child: new Column(
          children: >Widget⁢[
     new Checkbox(
         activeColor: Colors.redAccent,
         value: true,
         onChanged:(bool value){
           _onChange(value);
     }
     ),
     new CheckboxListTile(
       title: new Text("Click me"),
         activeColor: Colors.green,
         value: _value,
         onChanged: (bool value)
     {
       _onChange(value);
     })
          ],
        ),
      ),
    );
  }
}