Flutter开发之——监听堆栈变化，2024年Android开发进阶课程

super.dispose();

routeObserver.unsubscribe(this);

}

四 路由堆栈示例

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4.1 示例一(从A页面跳转路由监听页面)

** MaterialApp组件中添加**

RouteObserver routeObserver=RouteObserver();

class MyApp extends StatelessWidget {

@override

Widget build(BuildContext context) {

return MaterialApp(

routes: <String, WidgetBuilder>{

“/M”:(context)=>MyApp(),

“/B”:(context)=>BPage(),

“/C”:(context)=>CPage(),

“/D”:(context)=>DPage(),

“/P”:(context)=>ProductDetail(),

“/ARouteObserver”:(context)=>ARouteObserverDemo(),

“/BRouteObserver”:(context)=>BRouteObserverDemo(),

},

navigatorObservers: [routeObserver],

title: ‘Flutter Demo’,

theme: ThemeData(primarySwatch: Colors.blue,),

home: MyHomePage(title: ‘Flutter Demo Home Page’),

);

}

}

路由监听

class ARouteObserverDemo extends StatefulWidget {

@override

_RouteObserverDemoState createState() => _RouteObserverDemoState();

}

class _RouteObserverDemoState extends State with RouteAware {

@override

void didChangeDependencies() {

super.didChangeDependencies();

routeObserver.subscribe(this, ModalRoute.of(context));