import 'package:carousel_slider/carousel_slider.dart';

CarouselSlider(
  height: 400.0,
  items: [1,2,3,4,5].map((i) {
    return Builder(
      builder: (BuildContext context) {
        return Container(
          width: MediaQuery.of(context).size.width,
          margin: EdgeInsets.symmetric(horizontal: 5.0),
          decoration: BoxDecoration(
            color: Colors.amber
          ),
          child: Text('text $i', style: TextStyle(fontSize: 16.0),)
        );
      },
    );
  }).toList(),
)

CarouselSlider(
   items: items,
   height: 400,
   aspectRatio: 16/9,
   viewportFraction: 0.8,
   initialPage: 0,
   enableInfiniteScroll: true,
   reverse: false,
   autoPlay: true,
   autoPlayInterval: Duration(seconds: 3),
   autoPlayAnimationDuration: Duration(milliseconds: 800),
   autoPlayCurve: Curve.fastOutSlowIn,
   pauseAutoPlayOnTouch: Duration(seconds: 10),
   enlargeCenterPage: true,
   onPageChanged: callbackFunction,
   scrollDirection: Axis.horizontal,
 )

class CarouselWithIndicator extends StatefulWidget {
  @override
  _CarouselWithIndicatorState createState() => _CarouselWithIndicatorState();
}

class _CarouselWithIndicatorState extends State<CarouselWithIndicator> {
  int _current = 0;

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        CarouselSlider(
          items: child,
          autoPlay: true,
          aspectRatio: 2.0,
          onPageChangedCallback: (index) {
            setState(() {
              _current = index;
            });
          },
        ),
        Positioned(
          top: 0.0,
          left: 0.0,
          right: 0.0,
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: map<Widget>(imgList, (index, url) {
              return Container(
                width: 8.0,
                height: 8.0,
                margin: EdgeInsets.symmetric(vertical: 10.0, horizontal: 2.0),
                decoration: BoxDecoration(
                  shape: BoxShape.circle,
                  color: _current == index ? Color.fromRGBO(0, 0, 0, 0.9) : Color.fromRGBO(0, 0, 0, 0.4)
                ),
              );
            }),
          )
        )
      ]
    );
  }
}