The name 'CarouselSliderState' isn't a type, so it can't be used as a type argument.

[JayWebtech]

I got this after running this example

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

void main() { runApp(MyApp()); }

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

class MyHomePage extends StatefulWidget { final String title;

MyHomePage({Key key, this.title}) : super(key: key);

@override _MyHomePageState createState() => _MyHomePageState(); }

class _MyHomePageState extends State { final List colors = [ Colors.red, Colors.orange, Colors.yellow, Colors.green, Colors.blue, Colors.indigo, Colors.purple, ]; final List letters = [ "A", "B", "C", "D", "E", "F", "G", ];

bool _isPlaying = false; GlobalKey _sliderKey = GlobalKey();

@override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text(widget.title), ), body: ListView( children: [ Container( height: 500, child: CarouselSlider.builder( key: _sliderKey, unlimitedMode: true, slideBuilder: (index) { return Container( alignment: Alignment.center, color: colors[index], child: Text( letters[index], style: TextStyle(fontSize: 200, color: Colors.white), ), ); }, slideTransform: CubeTransform(), slideIndicator: CircularSlideIndicator( padding: EdgeInsets.only(bottom: 32), ), itemCount: colors.length), ), Padding( padding: const EdgeInsets.symmetric(vertical: 32), child: Align( child: ConstrainedBox( constraints: BoxConstraints(minWidth: 240, maxWidth: 600), child: Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [ IconButton( iconSize: 48, icon: Icon(Icons.skip_previous), onPressed: () { _sliderKey.currentState.previousPage(); }, ), IconButton( iconSize: 64, icon: Icon( _isPlaying ? Icons.pause_circle_outline : Icons.play_circle_outline, ), onPressed: () { setState( () { _isPlaying = !_isPlaying; _sliderKey.currentState.setPlaying(_isPlaying); }, ); }, ), IconButton( iconSize: 48, icon: Icon(Icons.skip_next), onPressed: () { _sliderKey.currentState.nextPage(); }, ), ], ), ), ), ), ], ), ); } }