Flutter检测杀死该应用程序

另请参阅https://flutter.io/flutter-for-android/#how-do-i-listen-to-android-
activity-lifecycle-events

您可以收听不活动，已暂停和已分离的内容。这可能为时过早，但通常最好是过早且频繁地进行一些清理，而不是根本不做：

WidgetsBinding.instance.addObserver(LifecycleEventHandler(    detachedCallBack: () async => widget.appController.persistState(),    resumeCallBack: () async {      _log.finest('resume...');    }));class LifecycleEventHandler extends WidgetsBindingObserver {  LifecycleEventHandler({this.resumeCallBack, this.detachedCallBack});  final FutureVoidCallback resumeCallBack;  final FutureVoidCallback detachedCallBack;//  @override//  Future<bool> didPopRoute()//  @override//  void didHaveMemoryPressure()  @override  Future<void> didChangeAppLifecycleState(AppLifecycleState state) async {    switch (state) {      case AppLifecycleState.inactive:      case AppLifecycleState.paused:      case AppLifecycleState.detached:        await detachedCallBack();        break;      case AppLifecycleState.resumed:        await resumeCallBack();        break;    }    _log.finest('''=============================================================    $state=============================================================''');  }//  @override//  void didChangeLocale(Locale locale)//  @override//  void didChangeTextScaleFactor()//  @override//  void didChangeMetrics();//  @override//  Future<bool> didPushRoute(String route)}

编辑

根据2019年11月4日的拉取请求，该枚举

AppLifecycleState.suspending

AppLifecycleState.detached

AppLifecycleState.suspending