Flutter：无法加载图像资产答案

【问题标题】：Flutter : Unable to load image assetFlutter：无法加载图像资产
【发布时间】：2021-01-17 08:42:57
【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。但是我得到这个错误，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
|-- 库
|--- 可绘制
|----- ic_launcher_transparent.png

pubspec.yaml
使用材料设计：真正
资产：
- 可绘制

遇到这个错误

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

【问题讨论】：

请将pubspec.yaml中的drawables更改为drawables/

标签： image flutter assets

【解决方案1】：

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/

【讨论】：