图像未在颤振 android 中加载

Question

我尝试了所有方法，但似乎没有任何效果。 据我所知，图像的路径是正确的。 （虽然我附上了一张图片供参考）。这是我得到的错误 -

════════ 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：快餐 描述：一个新的 Flutter 项目。

publish_to: '无'

版本：1.0.0+1

环境： sdk：">=2.7.0 <3.0.0"

依赖： 扑： sdk：颤动

启动画面：^1.3.5

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

dev_dependencies: 颤振测试： sdk：颤动

颤动：

使用材料设计：真实

资产： - 资产/开始.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

您需要先添加图片路径，即assets，然后添加图片名称

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

Answer 2

即使您已经在 pubspec.yaml 中提供了完整路径，也要提供完整路径。

因此，它应该是 'assets/start.png'

Answer 3

在图像路径中使用完整路径，例如 'assets/start.png'。

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