how to show bottom sheet on slide in flutter code example

Example 1: showModalBottomSheet on load

@override
  void initState() {
    // TODO: implement initState

    Future.delayed(Duration(seconds: 0)).then((_) {
      showModalBottomSheet(
          context: context,
          builder: (builder) {
            return Container();
          });
    });
    super.initState();
  }

Example 2: how to give bottom padding in Listview in flutter

// Add a bottom padding to Listview in Flutter
padding: const EdgeInsets.only(bottom: kFloatingActionButtonMargin + 48)