flutter - Flutter：无法加载 PNG 资源

Question

我需要在我的颤振应用程序中使用一些特定于密度的图像，但不幸的是我在加载它们时遇到了问题。

我根据官方文档https://flutter.dev/docs/development/ui/assets-and-images创建了几个密度特定的目录来存储图像，编辑了 pubscpec.yaml 并编写了一些代码。

资产：

/assets
  /images
   /1.0x
     /qr_logo.png
   /1.5x
     /qr_logo.png
   /2.0x
     /qr_logo.png
   /3.0x
     /qr_logo.png
   /4.0x
     /qr_logo.png

pubspec.yaml：

flutter:
  uses-material-design: true

  assets:
    - assets/images/
    - assets/strings/uk.json
    - assets/strings/ru.json

代码：

GestureDetector(
     child: Container(
              width:120,
              height: 40,
              decoration: BoxDecoration(
                           color: Colors.black,
                           image: DecorationImage(
                               image:AssetImage('assets/images/qr_logo.png'),
                               fit:BoxFit.cover
                           ),
                       )
                   ),onTap:(){
                 print("CLICKED!");
               })

这导致：他在解析图像编解码器时抛出了以下断言：无法加载资产：assets/images/qr_logo.png

抛出异常时，这是堆栈：

0 PlatformAssetBundle.load (包:flutter/src/services/asset_bundle.dart:221:7)

1 AssetBundleImageProvider._loadAsync (package:flutter/src/painting/image_provider.dart:464:44)

2 AssetBundleImageProvider.load (package:flutter/src/painting/image_provider.dart:449:14) ...

图片提供者：AssetImage(bundle: null, name: "assets/images/qr_logo.png") 图片键: AssetBundleImageKey(bundle: PlatformAssetBundle#5e64b(), name: "assets/images/qr_logo.png", scale: 1.0)

标签： flutterflutter-layoutflutter-dependencies