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Question

我是 flutter 的新手，我正在开发一个应用程序，该应用程序通过 Image.network 显示一长串图像列表视图。一切都在运行，但经常且绝对随机（即使我滚动得很慢），我收到此错误：

I/flutter (10990): EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE 
I/flutter (10990): The following HttpException was thrown resolving an image codec:
I/flutter (10990): Connection closed before full header was received, uri =
I/flutter (10990): http://www.attilofficina.altervista.org/phpbackend/JOB/000004/mockup/000004_017.jpg
I/flutter (10990): 
I/flutter (10990): When the exception was thrown, this was the stack:
I/flutter (10990): #0      NetworkImage._loadAsync (package:flutter/src/painting/image_provider.dart:525:41)
I/flutter (10990): <asynchronous suspension>.

那些图像被跳过了！

有没有办法处理这个错误并强制重新加载那些丢失的图像？特别感谢提前

我也尝试过 paginated listView，一次加载最少的页面数，但这并没有解决，错误总是随机返回。

这里扑医生 -v

[?] Flutter (Channel stable, v1.7.8+hotfix.3, on Microsoft Windows [Versione 10.0.17134.885], locale it-IT)
    • Flutter version 1.7.8+hotfix.3 at C:\src\flutter
    • Framework revision b712a172f9 (7 days ago), 2019-07-09 13:14:38 -0700
    • Engine revision 54ad777fd2
    • Dart version 2.4.0


[?] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at C:\Users\Mussa.DESKTOP-HFFLS0G\AppData\Local\Android\sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)
    • All Android licenses accepted.

[?] Android Studio (version 3.4)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin version 37.0.1
    • Dart plugin version 183.6270
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1343-b01)

[?] VS Code (version 1.36.0)
    • VS Code at C:\Users\Mussa.DESKTOP-HFFLS0G\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.2.0

[?] Connected device (1 available)
    • Android SDK built for x86 • emulator-5554 • android-x86 • Android P (API 27) (emulator)

• No issues found!

Answer 1

可能是因为widget在widget树中被重用，从而中断了HTTP请求。然后，您可以在 FutureBuilder 或 Image 小部件中使用密钥。

child: FutureBuilder<File>(
  key: ValueKey(imageUrl), // or use UniqueKey()  
  ...

Answer 2

我遇到了完全相同的问题，但始终无法找出问题的原因。我最终使用了缓存网络图像库，它解决了我的图像加载问题。