颤动：无法加载图像资源 [英] Flutter : Unable to load image asset

问题描述

这是我第一次使用Ffltter，遵循了文档中描述的所有内容，并向小部件添加了图像。但是我收到这个错误，我不能理解哪里出了问题

我尝试过这种方式

@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
  其他资产：
  插图
  

我收到此错误

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

推荐答案

该文件在lib文件夹中。因此，您需要在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),
  );
}

和PubSpec将如下所示。

• pubspec.yaml
  使用-材料-设计：真
  其他资产：
  *-lib/Drawables/
  

这篇关于颤动：无法加载图像资源的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！