didChangeAppLifecycleState method Null safety

void didChangeAppLifecycleState(
  1. AppLifecycleState state
)

Called when the system puts the app in the background or returns the app to the foreground.

An example of implementing this method is provided in the class-level documentation for the WidgetsBindingObserver class.

This method exposes notifications from SystemChannels.lifecycle.

Implementation

void didChangeAppLifecycleState(AppLifecycleState state) {}