问题描述
我已经尝试了一切,包括对pubspec.yaml文件的每次修改,清理干净,更新清理和我的IDE(Android Studio)。似乎什么都没用。
图像文件的路径:
lib/assets/images/waiting.png
代码:
return Container(
height: 300,child: transactions.isEmpty
? Column(
children: <Widget>[
Text(
'No Transactions yet',style: TextStyle(
fontWeight: FontWeight.bold,fontSize: 20.0,),Container(
height: 200,child: Image.asset(
'assets/images/waiting.png',fit: BoxFit.cover,],)
: ListView.builder(
itemBuilder: (context,index) {
return Container(
margin: EdgeInsets.fromLTRB(20.0,10.0,20.0,10.0),padding: EdgeInsets.all(3.0),decoration: Boxdecoration(
gradient: LinearGradient(colors: _txColors),border: Border.all(color: Colors.grey,width: 2.0),borderRadius: BorderRadius.all(
Radius.circular(15.0),color: Colors.greenAccent,child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,children: <Widget>[
Container(
child: Text(
'\$${transactions[index].amount.toStringAsFixed(2)}',style: TextStyle(
fontWeight: FontWeight.bold,color: Colors.white,// Color(0xffC5CED4),
Pubspec.yaml:
Flutter:
uses-material-design: true
assets:
- assets/images/
错误:
I/Flutter ( 5679): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════
I/Flutter ( 5679): The following assertion was thrown resolving an image codec:
I/Flutter ( 5679): Unable to load asset: assets/images/waiting.png
I/Flutter ( 5679):
I/Flutter ( 5679): When the exception was thrown,this was the stack:
I/Flutter ( 5679): #0 PlatformAssetBundle.load (package:Flutter/src/services/asset_bundle.dart:221:7)
I/Flutter ( 5679): <asynchronous suspension>
I/Flutter ( 5679): #1 AssetBundleImageProvider._loadAsync (package:Flutter/src/painting/image_provider.dart:664:31)
I/Flutter ( 5679): #2 AssetBundleImageProvider.load (package:Flutter/src/painting/image_provider.dart:648:14)
I/Flutter ( 5679): #3 ImageProvider.resolveStreamForKey.<anonymous closure> (package:Flutter/src/painting/image_provider.dart:501:13)
I/Flutter ( 5679): #4 ImageCache.putIfAbsent (package:Flutter/src/painting/image_cache.dart:359:22)
I/Flutter ( 5679): #5 ImageProvider.resolveStreamForKey (package:Flutter/src/painting/image_provider.dart:499:80)
I/Flutter ( 5679): #6 ScrollAwareImageProvider.resolveStreamForKey (package:Flutter/src/widgets/scroll_aware_image_provider.dart:106:19)
I/Flutter ( 5679): #7 ImageProvider.resolve.<anonymous closure> (package:Flutter/src/painting/image_provider.dart:330:9)
I/Flutter ( 5679): #8 ImageProvider._createErrorHandlerAndKey.<anonymous closure>.<anonymous closure> (package:Flutter/src/painting/image_provider.dart:460:26)
I/Flutter ( 5679): (elided 13 frames from dart:async)
I/Flutter ( 5679):
I/Flutter ( 5679): Image provider: Assetimage(bundle: null,name: "assets/images/waiting.png")
I/Flutter ( 5679): Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#288b8(),name:
I/Flutter ( 5679): "assets/images/waiting.png",scale: 1.0)
I/Flutter ( 5679): ════════════════════════════════════════════════════════════════════════════════════════════════════
解决方法
如Omi Shah所说,将资产文件夹移到lib文件夹的同一级别。
或
请尝试更改pubspec.yaml和资产网址'
Image.asset(
'lib/assets/images/waiting.png',fit: BoxFit.cover,),
flutter:
uses-material-design: true
assets:
- lib/assets/images/
,
我确实必须将资产文件夹移动到与lib文件夹相同的级别。但是我还必须解决pubspec.yaml文件的缩进问题。
flutter:
uses-material-design: true
assets:
- assets/
--------------------------------
flutter:
[space][space]uses-material-design: true
[space][space]assets:
[space][space][space]- assets/
,
在这上面花了几分钟的时间,一切看起来都不错,识别、路径等。 诀窍是从终端运行flutter clean并重建。