如何检查我的小部件屏幕何时能像Android中的onResume一样在可见性中波动

如何检查我的小部件屏幕何时能像Android中的onResume一样在可见性中波动

所有的问题都解决了。

将观察者从小部件树（materialappwidget）的根放置在导航器上。

如果您需要更多说明，请访问此链接：https : //api.flutter.dev/flutter/widgets/RouteObserver-
class.html

我已经在我的项目中实现了它，并且工作得很好@ Sp4Rx

// Register the RouteObserver as a navigation observer.final RouteObserver<PageRoute> routeObserver =   RouteObserver<PageRoute>();  void main() {runApp(MaterialApp(home: Container(),navigatorObservers: [routeObserver], ));   } class RouteAwareWidget extends StatefulWidget {  State<RouteAwareWidget> createState() => RouteAwareWidgetState(); } // Implement RouteAware in a widget's state and subscribe it to   the   RouteObserver.  class RouteAwareWidgetState extends State<RouteAwareWidget> with  RouteAware {@overridevoid didChangeDependencies() {  super.didChangeDependencies();routeObserver.subscribe(this, ModalRoute.of(context));}@overridevoid dispose() {routeObserver.unsubscribe(this);super.dispose();}@overridevoid didPush() {  // Route was pushed onto navigator and is now topmost route.} @overridevoid didPopNext() {  // Covering route was popped off the navigator. }@overrideWidget build(BuildContext context) => Container(); }