我正在使用 Flutter 开发图像查看器桌面应用程序。我尝试使用 flutter Image.file('largeImage.jpg') 打开的图像，但它无法加载图像并出现以下错误:
══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞═════════════════════════════════════
The following _Exception was thrown resolving an image frame:
Exception: Codec failed to produce an image, possibly due to invalid image data.
When the exception was thrown, this was the stack
Path: images/largeImage.jpg
当我在图像查看器内置的任何其他窗口中打开相同的图像时，它会打开。如果使用相同的代码 Image.file('smallSize.jpg') 在 flutter 中它工作正常。
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text('Image Viewer'),
),
body: Center(
child:
//not working
Image.file(File('images/largeImage.JPG')),//515MB
//working
Image.file(File('images/smallImage.JPG')), //10MB
),
);
}
我也试过 extended_image库，但它不显示任何内容(只是一个空白窗口)并且没有异常。
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text('Image Viewer'),
),
body: Center(
child:
ExtendedImage.file(
width: 600,
height: 400,
File('images/Panel.JPG'),
//cancelToken: cancellationToken,
),
),
);
}
下面是 flutter.doctor 的总结:
Doctor summary (to see all details, run flutter doctor -v): [√] Flutter (Channel stable, 3.3.9, on Microsoft Windows [Version
10.0.19041.1415], locale en-US) [√] Android toolchain - develop for Android devices (Android SDK version 32.0.0) [√] Chrome - develop for the web [√] Visual Studio - develop for Windows (Visual Studio Community 2022 17.4.2) [√] Android Studio (version 2020.3) [√] VS Code (version 1.74.0) [√] Connected device (3 available) [√] HTTP Host Availability
• No issues found!
提前致谢
最佳答案
请你测试下面的代码，老实说，我对此不确定。
Image.file(File(path),
width: 200,
height: 200,
cacheHeight: 200,
cacheWidth: 200,
)
并阅读这个有用的 comment
关于flutter - 无法在 flutter 图像小部件中打开大尺寸(500MB)图像，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/74822520/