Future showModalBottomSheet({BuildContext context, WidgetBuilder builder })

Shows a modal material design bottom sheet.

A modal bottom sheet is an alternative to a menu or a dialog and prevents the user from interacting with the rest of the app.

A closely related widget is a persistent bottom sheet, which shows information that supplements the primary content of the app without preventing the use from interacting with the app. Persistent bottom sheets can be created and displayed with the Scaffold.showBottomSheet function.

Returns a Future that resolves to the value (if any) that was passed to Navigator.pop when the modal bottom sheet was closed.

See also:

Source 

Future<dynamic/*=T*/> showModalBottomSheet/*<T>*/({ BuildContext context, WidgetBuilder builder }) {
  assert(context != null);
  assert(builder != null);
  return Navigator.push(context, new _ModalBottomSheetRoute<dynamic/*=T*/>(
    builder: builder,
    theme: Theme.of(context, shadowThemeOnly: true),
  ));
}