Flutter：无法加载图像资产

Question

这是我第一次使用flutter，按照文档中描述的所有内容将图像添加到小部件。但是我得到这个错误，我不明白哪里错了

Am tried this way

@override
  Widget build(BuildContext context) {
    return Container(
      child: Image.asset("drawables/ic_launcher_transparent.png", width : 100, height: 100),
    );
  }

文件结构
|-- 库
|--- 可绘制
|----- ic_launcher_transparent.png

pubspec.yaml
使用-material-设计：真实
资产：
- 可绘制对象

Am getting this error

════════ 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)
════════════════════════════════════════════════════════════════════════════════════════════════════

Answer 1

该文件位于 lib 文件夹中。所以你需要link lib in url。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
uses-material-design: 真
资产：
- lib/drawables/

Flutter：无法加载图像资产

Flutter : Unable to load image asset

assets

image

flutter