flutter android中未加载图像

Question

我试了所有的办法，但似乎都不奏效。据我说，图像的路径是正确的。（虽然我附上了一张图片供参考）。这就是我得到的错误-

════════ Exception caught by image resource service ════════════════════════════
The following assertion was thrown resolving an image codec:
Unable to load asset: start.png

When the exception was thrown, this was the stack
#0      PlatformAssetBundle.load
package:flutter/…/services/asset_bundle.dart:225
<asynchronous suspension>
#1      AssetBundleImageProvider._loadAsync
package:flutter/…/painting/image_provider.dart:668
#2      AssetBundleImageProvider.load
package:flutter/…/painting/image_provider.dart:651
#3      ImageProvider.resolveStreamForKey.<anonymous closure>
package:flutter/…/painting/image_provider.dart:504
...
Image provider: AssetImage(bundle: null, name: "start.png")
Image key: AssetBundleImageKey(bundle: PlatformAssetBundle#2bd13(), name: "start.png", scale: 1.0)
════════════════════════════════════════════════════════════════════════════════

这是**pubspec.yaml*-

名称：foodfast描述：一个新的颤振项目。

Publish_To:'none'

版本:1.0.0+1

环境：SDK：“>=2.7.0<3.0.0”

依赖项：flutter：SDK：flutter

弹出屏幕:^1.3.5

cupertino_icons:^1.0.0firebase_auth:^0.20.0+1 cloud_firestore:^0.16.0

dev_dependencies:flutter_test:sdk:flutter

颤振：

用途-材料-设计：真

资产：-资产/start.png

Sign_In.Dart

import 'package:flutter/material.dart';

class SignIn extends StatefulWidget {
  @override
  _SignInState createState() => _SignInState();
}

class _SignInState extends State<SignIn> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: new AppBar(
        title: new Text('sign in'),
      ),
      backgroundColor: Colors.white,
      body: Center(
          child: ListView(
        children: <Widget>[
          Image(image: AssetImage('start.png'), fit: BoxFit.cover),
          new Text('text below image')
        ],
      )),
    );
  }
}

Answer 1

提供完整的路径，即使您已经在pubspec.yaml中给出了它。

因此，它应该是'assets/start.png'

Answer 2

您需要首先添加图像的路径，即资产，然后添加图像名称

Image(image: AssetImage('assets/start.png'), fit: BoxFit.cover),