void main() {
  runApp(MyApp());
}
class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
   static Map<String, FlutterBoostRouteFactory>
	   routerMap = {
    '/': (settings, uniqueId) {
      return PageRouteBuilder<dynamic>(
          settings: settings, pageBuilder: (_, __, ___)
          => Container());
    },
    'embedded': (settings, uniqueId) {
      return PageRouteBuilder<dynamic>(
          settings: settings,
          pageBuilder: (_, __, ___) =>
          EmbeddedFirstRouteWidget());
    },
    'presentFlutterPage': (settings, uniqueId) {
      return PageRouteBuilder<dynamic>(
          settings: settings,
          pageBuilder: (_, __, ___) =>
          FlutterRouteWidget(
                params: settings.arguments,
                uniqueId: uniqueId,
              ));
    }};
   Route<dynamic> routeFactory(RouteSettings settings, String uniqueId) {
    FlutterBoostRouteFactory func =routerMap[settings.name];
    if (func == null) {
      return null;
    }
    return func(settings, uniqueId);
  }

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return FlutterBoostApp(
      routeFactory
    );
  }

class SimpleWidget extends StatefulWidget {
  final Map params;
  final String messages;
  final String uniqueId;

  const SimpleWidget(this.uniqueId, this.params, this.messages);

  @override
  _SimpleWidgetState createState() => _SimpleWidgetState();
}

class _SimpleWidgetState extends State<SimpleWidget>
    with PageVisibilityObserver {
  static const String _kTag = 'xlog';
  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    print('$_kTag#didChangeDependencies, ${widget.uniqueId}, $this');

  }

  @override
  void initState() {
    super.initState();
   PageVisibilityBinding.instance.addObserver(this, ModalRoute.of(context));
   print('$_kTag#initState, ${widget.uniqueId}, $this');
  }

  @override
  void dispose() {
    PageVisibilityBinding.instance.removeObserver(this);
    print('$_kTag#dispose, ${widget.uniqueId}, $this');
    super.dispose();
  }

  @override
  void onForeground() {
    print('$_kTag#onForeground, ${widget.uniqueId}, $this');
  }

  @override
  void onBackground() {
    print('$_kTag#onBackground, ${widget.uniqueId}, $this');
  }

  @override
  void onAppear(ChangeReason reason) {
    print('$_kTag#onAppear, ${widget.uniqueId}, $reason, $this');
  }

  void onDisappear(ChangeReason reason) {
    print('$_kTag#onDisappear, ${widget.uniqueId}, $reason, $this');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('tab_example'),
      ),
      body: SingleChildScrollView(
          physics: BouncingScrollPhysics(),
          child: Container(
              child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: <Widget>[
              Container(
                margin: const EdgeInsets.only(top: 80.0),
                child: Text(
                  widget.messages,
                  style: TextStyle(fontSize: 28.0, color: Colors.blue),
                ),
                alignment: AlignmentDirectional.center,
              ),
              Container(
                margin: const EdgeInsets.only(top: 32.0),
                child: Text(
                  widget.uniqueId,
                  style: TextStyle(fontSize: 22.0, color: Colors.red),
                ),
                alignment: AlignmentDirectional.center,
              ),
              InkWell(
                child: Container(
                    padding: const EdgeInsets.all(8.0),
                    margin: const EdgeInsets.all(30.0),
                    color: Colors.yellow,
                    child: Text(
                      'open flutter page',
                      style: TextStyle(fontSize: 22.0, color: Colors.black),
                    )),
                onTap: () => BoostNavigator.of().push("flutterPage",
                    arguments: <String, String>{'from': widget.uniqueId}),
              )
              Container(
                height: 300,
                width: 200,
                child: Text(
                  '',
                  style: TextStyle(fontSize: 22.0, color: Colors.black),
                ),
              )
            ],
          ))),
    );
  }
}