On navigator.pop (not an issue)

[spacekestrel]

Is there a way to detect whether ModalBottomSheet is closed by tapping on the rest of the screen? I need to invoke some functions on this moment.

[JulianAssmann]

You can wrap you modal widget in a WillPopScope:

WillPopScope(
      onWillPop: () async {
        // TODO
      },
      child: Scaffold(
        // ...
     )
)

However, this will not differentiate between closing the modal by tapping outside of it and dragging it down. Maybe this helps.