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class _MyHomePageState extends State with
WidgetsBindingObserver {
@override
void didChangeAppLifecycleState(AppLifecycleState state) {
print('*** state = ${state.toString()}');
}
@override
void initState() {
super.initState();
WidgetsBinding.instance.addObserver(this);
}
@override
void dispose() {
super.dispose();
WidgetsBinding.instance.removeObserver(this);
}
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