chore: update example

Author: StanleyCocos

example/lib/main.dart

@@ -7,36 +7,33 @@ void main() => runApp(new MyApp());
 class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
- return new MaterialApp(
+ return MaterialApp(
  title: 'Flutter Demo',
- theme: new ThemeData(
+ theme: ThemeData(
  primarySwatch: Colors.blue,
  ),
- home: new MyHomePage(title: 'Flutter Demo Home Page'),
+ home: MyHomePage(title: 'Flutter Demo Home Page'),
  );
  }
 }
 
 class MyHomePage extends StatefulWidget {
- MyHomePage({Key key, this.title}) : super(key: key);
+ MyHomePage({Key? key, required this.title}) : super(key: key);
 
  final String title;
 
  @override
- _MyHomePageState createState() => new _MyHomePageState();
+ _MyHomePageState createState() => _MyHomePageState();
 }
 
 class _MyHomePageState extends State<MyHomePage> {
  GlobalKey<MiniGesturePasswordState> miniGesturePassword =
  new GlobalKey<MiniGesturePasswordState>();
 
- GlobalKey<ScaffoldState> scaffoldState = new GlobalKey<ScaffoldState>();
-
  @override
  Widget build(BuildContext context) {
  return new MaterialApp(
  home: new Scaffold(
- key: scaffoldState,
  appBar: new AppBar(
  title: new Text('Plugin example app'),
  ),
@@ -53,13 +50,13 @@ class _MyHomePageState extends State<MyHomePage> {
  width: 200.0,
  successCallback: (s) {
  print("successCallback$s");
- scaffoldState.currentState?.showSnackBar(new SnackBar(
+ ScaffoldMessenger.of(context).showSnackBar(new SnackBar(
  content: new Text('successCallback:$s')));
  miniGesturePassword.currentState?.setSelected('');
  },
  failCallback: () {
  print('failCallback');
- scaffoldState.currentState?.showSnackBar(
+ ScaffoldMessenger.of(context).showSnackBar(
  new SnackBar(content: new Text('failCallback')));
  miniGesturePassword.currentState?.setSelected('');
  },

example/pubspec.yaml

@@ -1,13 +1,17 @@
 name: example
 description: A new Flutter project.
 
+environment:
+ sdk: ">=2.15.0 <4.0.0"
+ flutter: ">=3.0.0"
+
 dependencies:
  flutter:
  sdk: flutter
 
  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
- cupertino_icons: ^0.1.2
+ cupertino_icons: ^1.0.5
  gesture_password:
  path: ../