I am curious whether the app would be rebuild, thus, calling initState again, if the user just closes the app, but does not close it in the background. Does it make a difference if the user instantly reopens the app compared to coming back a couple hours later? Or would the app just be frozen in the state it had when it was closed?

CodePudding user response：

No initState is not call after came back from background.. You can use WidgetsBindingObserver for this type of work..