Flutter "Exception caught by image resource service... Unable to load asset: appleandbook.png&q-CodePudding

I made a mistake learning the image widget.I browsed dozens of forums and watched videos but it never improved, I will be glad if you help. The scripts I wrote are as follows: main.dart

return Center( child: MaterialApp( title: 'Flutter Learning', debugShowCheckedModeBanner: false, theme: ThemeData().copyWith( cardTheme: CardTheme( shape: StadiumBorder(), ), appBarTheme: AppBarTheme( centerTitle: true,

          backgroundColor: Colors.transparent,
          elevation: 0,
          foregroundColor: Colors.black,
          systemOverlayStyle: SystemUiOverlayStyle.light,
        )),
        home: ImageWidgetLearn(),
      ),
    );

image_learn.dart

import 'package:flutter/material.dart';

class ImageWidgetLearn extends StatelessWidget {
  String appBarTitle = "Image Learn";

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
          title: Text(appBarTitle),
          bottom: PreferredSize(
            child: Container(
              color: Colors.black45,
              height: 0.5,
            ),
            preferredSize: Size.fromHeight(1.0),
          )),
      body: Column(
        children: [
          Text("selam aleyküm"),
          Image.asset('assets/images/appleandbook.png')
        ],
      ),    
    );
  }
}

pubspec.yaml

name: flutterfulllearn
description: A new Flutter project.

# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a  .
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0 1

environment:
  sdk: ">=2.17.5 <3.0.0"

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  flutter:
    sdk: flutter


  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.2

dev_dependencies:
  flutter_test:
    sdk: flutter

  # The "flutter_lints" package below contains a set of recommended lints to
  # encourage good coding practices. The lint set provided by the package is
  # activated in the `analysis_options.yaml` file located at the root of your
  # package. See that file for information about deactivating specific lint
  # rules and activating additional ones.
  flutter_lints: ^2.0.0

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter packages.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  # uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - images/a_dot_burr.jpeg
  #   - images/a_dot_ham.jpeg
  assets:
    - assets\images\appleandbook.png

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/assets-and-images/#resolution-aware

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/custom-fonts/#from-packages

and error message [error message like this][1]

  [1]: https://i.stack.imgur.com/b5ySj.png

CodePudding user response：

In your pubspec.yaml file change the assets path like this

assets/images/appleandbook.png

Change the backslash \ by slash /

CodePudding user response：

It seems you have messed with slashes. Instead of / you should use \. So that the code in your yaml file should look like next

  assets:
    - assets\images\appleandbook.png

After that, dont forget to recompile your app so that resources are included