image - Flutter:无法加载图像资产
问题描述
这是我第一次使用颤振,遵循文档中描述的所有内容并将图像添加到小部件。但我得到这个错误,我不明白做错了什么
我试过这种方式
@override
Widget build(BuildContext context) {
return Container(
child: Image.asset("drawables/ic_launcher_transparent.png", width : 100, height: 100),
);
}
- 文件结构
|-- lib
|--- 可绘制
|----- ic_launcher_transparent.png
- pubspec.yaml
使用材料设计:真实
资产:
-drawables
收到此错误
════════ Exception caught by image resource service ════════════════════════════════════════════════
The following assertion was thrown resolving an image codec:
Unable to load asset: drawables/ic_launcher_transparent.png
When the exception was thrown, this was the stack:
#0 PlatformAssetBundle.load (package:flutter/src/services/asset_bundle.dart:225:7)
<asynchronous suspension>
#1 AssetBundleImageProvider._loadAsync (package:flutter/src/painting/image_provider.dart:668:31)
#2 AssetBundleImageProvider.load (package:flutter/src/painting/image_provider.dart:651:14)
#3 ImageProvider.resolveStreamForKey.<anonymous closure> (package:flutter/src/painting/image_provider.dart:504:13)
...
Image provider: AssetImage(bundle: null, name: "drawables/ic_launcher_transparent.png")
Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#59d28(), name: "drawables/ic_launcher_transparent.png", scale: 1.0)
════════════════════════════════════════════════════════════════════════════════════════════════════
解决方案
该文件位于 lib 文件夹中。所以你需要在url中链接lib。检查下面。
@override
Widget build(BuildContext context) {
return Container(
child: Image.asset("lib/drawables/ic_launcher_transparent.png", width : 100, height: 100),
);
}
Pubspec 将如下所示。
- pubspec.yaml
使用材料设计:真实
资产:
- lib/drawables/
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