Flutter Navigation Fade Transition

page_route_builder.dart

Navigator.of(context).push(
  new PageRouteBuilder(
    pageBuilder: (BuildContext context, _, __) {
      return new Notes();
    },
    transitionsBuilder: (_, Animation<double> animation, __, Widget child) {
      return new FadeTransition(
        opacity: animation,
        child: child
      );
    }
  )
);
  

Thanks for this.