create_trip_page.dart

Future<void> _createTrip(BuildContext context) async {
  // Display the loading indicator.
  setState(() => _isLoading = true);

  await ScopedModel.of<PhotosLibraryApiModel>(context)
      .createAlbum(tripNameFormController.text)
      .then((Album album) {

    // Hide the loading indicator.
    setState(() => _isLoading = false);
    Navigator.pop(context);
  });
}