This is a small portion of my code. It is used to create a slider.

slider.dart

import 'dart:io';
import 'package:carousel_slider/carousel_slider.dart';
import 'package:dnb/services/AssetManager.dart';
import 'package:flutter/material.dart';

class NoticeSliderScreen extends StatefulWidget {
  @override
  _NoticeSliderScreenState createState() => _NoticeSliderScreenState();
}

class _NoticeSliderScreenState extends State<NoticeSliderScreen> {
  int _current = 0;

  @override
  Widget build(BuildContext context) {
    return Container(
      color: Colors.black,
      child: Row(
        children: <Widget>[
          Flexible(
            child: CarouselSlider(
              viewportFraction: 1.0,
              initialPage: 0,
              autoPlay: true,
              enableInfiniteScroll: true,
              autoPlayInterval: Duration(seconds: 2),
              scrollDirection: Axis.horizontal,
              onPageChanged: (index) {
                setState(() {
                  _current = index;
                });
              },
              items: noticeList.map((url) {
                return Builder(
                  builder: (BuildContext context) {
                    return Container(
                      color: Colors.black,
                      child: Row(
                        //crossAxisAlignment: CrossAxisAlignment.center,
                        children: <Widget>[
                          Expanded(
                              child: Image.file(
                                File(url),
                                fit: BoxFit.fill,
                              )),
                        ],
                      ),
                    );
                  },
                );
              }).toList(),
            ),
          ),
        ],
      ),
    );
  }
}