问题
I need to know the current state of the flutter app view in an android plugin package.
For now, I observe the state in the flutter view with https://docs.flutter.io/flutter/widgets/WidgetsBindingObserver-class.html and pass it then to my plugin.
As this seems sometimes not perfect (the first event is not passed on Android) I would like to get the state directly from the android plugin.
In the plugin I get the registrar and can its activity, but how do I observe the state of it?
回答1:
Flutter doesn't provide hooks for these lifecycle events.
Android Jetpack (formerly Architecture Components) added a nice way to receive lifecycle events from an activity:
Handling Lifecycles with Lifecycle-Aware Components
Downside: It only works when the activity is an AppCompatActivity. Flutter apps are usually based on a simple Activity, so you have to tell your users to use an AppCompatActivity instead.
来源：https://stackoverflow.com/questions/53883813/how-to-handle-android-lifecycle-in-flutter-android-plugin-package