didChangeAppLifecycleState method
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.
See also:
- AppLifecycleListener, an alternative API for responding to application lifecycle changes.
Implementation
@override
void didChangeAppLifecycleState(AppLifecycleState state) {
if (!(controller.cameraController?.value.isInitialized == true)) {
return;
}
if (state == AppLifecycleState.inactive) {
postFrame(() {
controller.dispose();
});
} else if (state == AppLifecycleState.resumed) {
_initController();
}
super.didChangeAppLifecycleState(state);
}