pubspec.yaml

              dependencies:
                flutter:
                  sdk: flutter
                carousel_slider: ^4.0.0


              

main scrren

              import 'package:flutter/material.dart';
import 'package:carousel_slider/carousel_slider.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  final List<String> images = [
    'https://via.placeholder.com/600x200/FF0000/FFFFFF',
    'https://via.placeholder.com/600x200/00FF00/FFFFFF',
    'https://via.placeholder.com/600x200/0000FF/FFFFFF',
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Banner Slider'),
      ),
      body: Center(
        child: CarouselSlider(
          options: CarouselOptions(
            height: 200.0,
            enlargeCenterPage: true,
            autoPlay: true,
            aspectRatio: 16 / 9,
            autoPlayCurve: Curves.fastOutSlowIn,
            enableInfiniteScroll: true,
            autoPlayAnimationDuration: Duration(milliseconds: 800),
            viewportFraction: 0.8,
          ),
          items: images.map((String imageUrl) {
            return Builder(
              builder: (BuildContext context) {
                return Container(
                  width: MediaQuery.of(context).size.width,
                  margin: EdgeInsets.symmetric(horizontal: 5.0),
                  decoration: BoxDecoration(
                    color: Colors.grey,
                  ),
                  child: Image.network(
                    imageUrl,
                    fit: BoxFit.cover,
                  ),
                );
              },
            );
          }).toList(),
        ),
      ),
    );
  }
}

Positioning to top

import 'package:flutter/material.dart';
import 'package:carousel_slider/carousel_slider.dart';


void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  final List<String> images = [
    'https://via.placeholder.com/600x200/FF0000/FFFFFF',
    'https://via.placeholder.com/600x200/00FF00/FFFFFF',
    'https://via.placeholder.com/600x200/0000FF/FFFFFF',
  ];

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Banner Slider'),
      ),
      body: Column (
        children: [
          CarouselSlider(
            options: CarouselOptions(
              height: 200.0,
              enlargeCenterPage: true,
              autoPlay: true,
              aspectRatio: 16 / 9,
              autoPlayCurve: Curves.fastOutSlowIn,
              enableInfiniteScroll: true,
              autoPlayAnimationDuration: Duration(milliseconds: 800),
              viewportFraction: 0.8,
            ),
            items: images.map((String imageUrl) {
              return Builder(
                builder: (BuildContext context) {

                  return Container(
                    width: MediaQuery.of(context).size.width,
                    margin: EdgeInsets.symmetric(horizontal: 5.0),
                    decoration: BoxDecoration(
                      boxShadow: [
                        BoxShadow(
                          color: Colors.black,
                          offset: Offset(2, 2),
                          spreadRadius: 2,
                          blurRadius: 5,
                        ),
                      ],
                      borderRadius: BorderRadius.all(Radius.circular(30)),
                    ),
                    child: GestureDetector(
                        child: Image.network(
                          imageUrl,
                          fit: BoxFit.cover,
                        ),
                        onTap: () {
                          print("Container was tapped");
                        }),
                  );
                },
              );
            }).toList(),
          ),
        ]
      ),
    );
  }
}