颤振找不到我的图像资产，我该怎么办？
我在调试器上收到错误：
在XT1097上以调试模式启动lib / main.dart。构建build / app / outputs / apk / debug / app-debug.apk。
I/flutter ( 876): ??? EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ???
I/flutter ( 876): Unable to load asset: assets/images/user/background.jpg
I/flutter ( 876): "assets/images/user/background.jpg", scale: 1.0)
我的pubspec.yml：
environment:
sdk: ">=2.0.0-dev.68.0 <3.0.0"
dependencies:
sqflite: any
path_provider: '>=0.3.0'
charts_flutter: any
cupertino_icons: ^0.1.2
material_search: ^0.2.8
dio: ^1.0.3
flutter:
sdk: flutter
dev_dependencies:
flutter_test:
sdk: flutter
flutter:
uses-material-design: true
assets:
- assets/images/
和代码：
new UserAccountsDrawerHeader(
decoration : BoxDecoration(
image: new DecorationImage( …