我不能上传图像作为背景到一个容器，我已经添加了资产文件夹中的图像，并将其添加到pubspec.yaml和显示我的错误：

I/flutter ( 6664): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════
I/flutter ( 6664): The following assertion was thrown resolving an image codec:
I/flutter ( 6664): Unable to load asset: assets/images/img.png
I/flutter ( 6664): 
I/flutter ( 6664): When the exception was thrown, this was the stack:
I/flutter ( 6664): #0      PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)
I/flutter ( 6664): <asynchronous suspension>
I/flutter ( 6664): #1      AssetBundleImageProvider._loadAsync (package:flutter/src/painting/image_provider.dart:484:44)
I/flutter ( 6664): #2      AssetBundleImageProvider.load (package:flutter/src/painting/image_provider.dart:469:14)
I/flutter ( 6664): #3      ImageProvider.resolve.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:327:17)
I/flutter ( 6664): #4      ImageCache.putIfAbsent (package:flutter/src/painting/image_cache.dart:160:22)
I/flutter ( 6664): #5      ImageProvider.resolve.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:325:84)
I/flutter ( 6664): (elided 13 frames from package dart:async)
I/flutter ( 6664): 
I/flutter ( 6664): Image provider: AssetImage(bundle: null, name: "assets/images/img.png")
I/flutter ( 6664): Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#99877(), name: "assets/images/img.png",
I/flutter ( 6664):   scale: 1.0)
I/flutter ( 6664): ════════════════════════════════════════════════════════════════════════════════════════════════════

字符串
代码：

body: Form(
          child: Column(
            children: <Widget>[
               Container(
                 decoration: BoxDecoration(
                   image: DecorationImage(
                     image: AssetImage("assets/images/img.png"),
                     fit: BoxFit.cover,
                   ),
                 ),

型
我已添加

assets:
  - assets/images/

型
到pubspec.yaml
图像文件夹

的数据
而在

assets:
  - assets/images/img.png

I/flutter ( 6664): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════
I/flutter ( 6664): The following assertion was thrown resolving an image codec:
I/flutter ( 6664): Unable to load asset: assets/images/img.png
I/flutter ( 6664): 
I/flutter ( 6664): When the exception was thrown, this was the stack:
I/flutter ( 6664): #0      PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:221:7)
I/flutter ( 6664): <asynchronous suspension>
I/flutter ( 6664): #1      AssetBundleImageProvider._loadAsync (package:flutter/src/painting/image_provider.dart:484:44)
I/flutter ( 6664): #2      AssetBundleImageProvider.load (package:flutter/src/painting/image_provider.dart:469:14)
I/flutter ( 6664): #3      ImageProvider.resolve.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:327:17)
I/flutter ( 6664): #4      ImageCache.putIfAbsent (package:flutter/src/painting/image_cache.dart:160:22)
I/flutter ( 6664): #5      ImageProvider.resolve.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:325:84)
I/flutter ( 6664): (elided 13 frames from package dart:async)
I/flutter ( 6664): 
I/flutter ( 6664): Image provider: AssetImage(bundle: null, name: "assets/images/img.png")
I/flutter ( 6664): Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#c1182(), name: "assets/images/img.png",
I/flutter ( 6664):   scale: 1.0)
I/flutter ( 6664): ════════════════════════════════════════════════════════════════════════════════════════════════════

5条答案

按热度按时间

u0sqgete1#

你需要像那样添加

flutter:
  assets:
    - assets/images/img.png

字符串

赞(0）回复(0）举报 2023-07-31

nzkunb0c2#

在我的例子中，我需要package属性，因为镜像在我的library项目中，并且我正在运行example项目。

package：[您的父目录或项目名称]

我的项目名称是 'flutter_demo'

AssetImage('assets/images/ic_welcome.png', package: 'flutter_demo'),

pubspect.yaml

flutter:
  assets:
    - assets/images/

型

目录结构：

flutter_demo
  -- assets
    -- images
      -- ic_welcome.png

2vuwiymt3#

我遇到了这个错误，这是我如何解决它：

首先确保assets文件夹位于项目的根目录下，lib文件夹之外。
检查AssetImage（）中的图像路径字符串前面是否有斜杠。
检查pubspec.yaml和AssetImage中的文件名和路径是否正确。
始终记住保存文件并在进行更改后进行热重新加载。
对于svg文件，请使用flutter_svg package。

u91tlkcl4#

试试这个：

flutter:
  assets:
    -android/assests/directory/

wztqucjr5#

在我的例子中，如果你的文件在子目录中，尝试添加子目录而不仅仅是父目录。就像

flutter:
  assets:
    - assets/subdirectory1/
    - assets/subdirectory2/

字符串
而不是

flutter:
  assets:
    - assets/

dart Flutter：无法加载资源

5条答案

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