animated_movie_card_widget.dart

@override
Widget build(BuildContext context) {
  //1
  return AnimatedBuilder(
    //2
    animation: pageController,
    builder: (context, child) {
      //3
      double value = 1;
      //4
      if (pageController.position.haveDimensions) {
        value = pageController.page - index;
        value = (1 - (value.abs() * 0.1)).clamp(0.0, 1.0);
        return Align(
          alignment: Alignment.topCenter,
          child: Container(
            //5
            height: Curves.easeIn.transform(value) * ScreenUtil.screenHeight * 0.35,
            width: Sizes.dimen_230.w,
            child: child,
          ),
        );
      } else {
        print('else');
        return Align(
          alignment: Alignment.topCenter,
          child: Container(
            height:
                Curves.easeIn.transform(index == 0 ? value : value * 0.5) *
                    ScreenUtil.screenHeight * 0.35,
            width: Sizes.dimen_230.w,
            child: child,
          ),
        );
      }
    },
    child: MovieCardWidget(
      movieId: movieId,
      posterPath: posterPath,
    ),
  );
}