Target of URI doesn't exist: 'package:flutter_intro_slider_example/home.dart'. The name 'Slide' isn't a class. The method 'HomePage' isn't defined for the type '_IntroSliderPageState'. Undefined class 'Slide'. The default 'List' constructor isn't available when null safety is enabled.

does anybody knows what's wrong with this dart code. I got this from

import 'package:flutter/material.dart';
import 'package:flutter_intro_slider_example/home.dart';
import 'package:intro_slider/dot_animation_enum.dart';
import 'package:intro_slider/intro_slider.dart';
import 'package:intro_slider/slide_object.dart';

class IntroSliderPage extends StatefulWidget {
  @override
  _IntroSliderPageState createState() => _IntroSliderPageState();
}

class _IntroSliderPageState extends State<IntroSliderPage> {
  List<Slide> slides = new List();

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    slides.add(
      new Slide(
        title: "Hello Food!",
        description:
        "The easiest way to order food from your favorite restaurant!",
        pathImage: "assets/images/hamburger.png",
      ),
    );
    slides.add(
      new Slide(
        title: "Movie Tickets",
        description: "Book movie tickets for your family and friends!",
        pathImage: "assets/images/movie.png",
      ),
    );
    slides.add(
      new Slide(
        title: "Great Discounts",
        description: "Best discounts on every single service we offer!",
        pathImage: "assets/images/discount.png",
      ),
    );
    slides.add(
      new Slide(
        title: "World Travel",
        description: "Book tickets of any transportation and travel the world!",
        pathImage: "assets/images/travel.png",
      ),
    );
  }

  List<Widget> renderListCustomTabs() {
    List<Widget> tabs = new List();
    for (int i = 0; i < slides.length; i  ) {
      Slide currentSlide = slides[i];
      tabs.add(
        Container(
          width: double.infinity,
          height: double.infinity,
          child: Container(
            margin: EdgeInsets.only(bottom: 160, top: 60),
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.center,
              children: [
                Container(
                  padding: EdgeInsets.all(20),
                  decoration: BoxDecoration(
                    shape: BoxShape.circle,
                    color: Colors.white,
                  ),
                  child: Image.asset(
                    currentSlide.pathImage,
                    matchTextDirection: true,
                    height: 60,
                  ),
                ),
                Container(
                  margin: EdgeInsets.only(top: 20),
                  child: Text(
                    currentSlide.title,
                    style: TextStyle(color: Colors.white, fontSize: 25),
                  ),
                ),
                Container(
                  padding: EdgeInsets.symmetric(
                    horizontal: 30,
                  ),
                  child: Text(
                    currentSlide.description,
                    style: TextStyle(
                      color: Colors.white,
                      fontSize: 14,
                      height: 1.5,
                    ),
                    maxLines: 3,
                    textAlign: TextAlign.center,
                    overflow: TextOverflow.ellipsis,
                  ),
                  margin: EdgeInsets.only(
                    top: 15,
                    left: 20,
                    right: 20,
                  ),
                ),
              ],
            ),
          ),
        ),
      );
    }
    return tabs;
  }

  @override
  Widget build(BuildContext context) {
    return IntroSlider(
      backgroundColorAllSlides: Colors.green[700],
      renderSkipBtn: Text("Skip"),
      renderNextBtn: Text(
        "Next",
        style: TextStyle(color: Colors.green[700]),
      ),
      renderDoneBtn: Text(
        "Done",
        style: TextStyle(color: Colors.green[700]),
      ),
      colorDoneBtn: Colors.white,
      colorActiveDot: Colors.white,
      sizeDot: 8.0,
      typeDotAnimation: dotSliderAnimation.SIZE_TRANSITION,
      listCustomTabs: this.renderListCustomTabs(),
      scrollPhysics: BouncingScrollPhysics(),
      shouldHideStatusBar: false,
      onDonePress: () => Navigator.pushReplacement(
        context,
        MaterialPageRoute(
          builder: (_) => HomePage(),
        ),
      ),
    );
  }
}

CodePudding user response：

You need to run flutter pub get to Get all the dependencies. If you are using VS Code then Go to pubspec.yaml and click on Get Packages Or if using Android Studio then Tools > Flutter > Flutter Pub Get to solve this.

Found out more here

CodePudding user response：

This code will run perfectly with the intro_slider: ^2.3.4 package. You might have upgraded the package version. Use intro_slider: ^2.3.4 version and run flutter pub get.

CodePudding user response：

run flutter clean to clear all builds. then run flutter pub upgrade to upgrade any outdated dependency. at last run flutter pub get.