Flutter Flatter/Dart copyCrop函数异常：无法实例化图像编解码器

我想在flatter中显示一个裁剪过的图像。我使用Image.memory小部件。当我使用原始图像时，没有问题

var tempStore = await ImagePicker.pickImage(source: ImageSource.camera);



    List<int> byteListe = await tempStore.readAsBytes();


    image = dartimage.Image.fromBytes(400, 400, byteList);

这是个例外

════════ Exception caught by image resource service ════════════════════════════════════════════════
The following _Exception was thrown while resolving an image:
Exception: Could not instantiate image codec.

When the exception was thrown, this was the stack: 
#0      _futurize (dart:ui/painting.dart:4304:5)
#1      instantiateImageCodec (dart:ui/painting.dart:1682:10)
#2      PaintingBinding.instantiateImageCodec (package:flutter/src/painting/binding.dart:88:12)
#3      MemoryImage._loadAsync (package:flutter/src/painting/image_provider.dart:714:18)
#4      MemoryImage.load (package:flutter/src/painting/image_provider.dart:706:14)
...
Image provider: MemoryImage(_Uint8ArrayView#a573e, scale: 1.0)
Image configuration: ImageConfiguration(bundle: PlatformAssetBundle#c13af(), devicePixelRatio: 4.0, locale: de_DE, textDirection: TextDirection.ltr, platform: android)
Image key: MemoryImage(_Uint8ArrayView#a573e, scale: 1.0)
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ Exception caught by image resource service ════════════════════════════════════════════════
The following _Exception was thrown while resolving an image:
Exception: Could not instantiate image codec.

When the exception was thrown, this was the stack: 
#0      _futurize (dart:ui/painting.dart:4304:5)
#1      instantiateImageCodec (dart:ui/painting.dart:1682:10)
#2      PaintingBinding.instantiateImageCodec (package:flutter/src/painting/binding.dart:88:12)
#3      MemoryImage._loadAsync (package:flutter/src/painting/image_provider.dart:714:18)
#4      MemoryImage.load (package:flutter/src/painting/image_provider.dart:706:14)
...
Image provider: MemoryImage(_Uint8ArrayView#a573e, scale: 1.0)
Image configuration: ImageConfiguration(bundle: PlatformAssetBundle#c13af(), devicePixelRatio: 4.0, locale: de_DE, textDirection: TextDirection.ltr, platform: android)
Image key: MemoryImage(_Uint8ArrayView#a573e, scale: 1.0)
════════════════════════════════════════════════════════════════════════════════════════════════════