Managing Local State Example

local-state-example.dart

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool isChecked = false;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(),
      body: Center(
          child: Checkbox(
              value: isChecked,
              onChanged: (newVal) {
                setState(() {
                  isChecked = newVal;
                });
              })),
    );
  }
}