dart image_picker：PNG类型不支持压缩,如何压缩扩展名为.png的图像文件？

wwwo4jvm 于 2023-06-27 发布在其他

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为了压缩.jpg文件，这段代码简单地工作。

File pickedFile = await ImagePicker.pickImage(source: ImageSource.gallery);
  print('Size in kb: -> ' + (pickedFile.lengthSync() / 1000).toString());
  File compressedFile = await ImagePicker.pickImage( source: ImageSource.gallery, imageQuality: 50);
  print('Size kb: -> ' + (compressedFile.lengthSync() / 1000).toString());

  _uploadFile(compressedFile);

但是如何压缩扩展名为.png的图像文件？
错误：

D/ImageResizer( 6282): image_picker: compressing is not supported for type PNG. Returning the image with original quality
W/ExifInterface( 6282): Invalid image: ExifInterface got an unsupported image format file(ExifInterface supports JPEG and some RAW image formats only) or a corrupted JPEG file to ExifInterface.

dart

来源：https://stackoverflow.com/questions/61436254/image-picker-compressing-is-not-supported-for-type-png-how-to-compress-the-ima