Attachment file with Chinese file name, how to support chinese file name

[function2000]

I try to use send email with attachment, the file name is Chinese, for example 销售报告.pdf,
But when send out, it is as ����.pdf .
Any idea to suppoer Chinese file name?

My code is as below:

for (final path in files) {
        final file = File(path);

        final mediaType = MediaType.guessFromFileExtension(file.path);

        await builder.addFile(file, mediaType);

      }

Thanks a lot!

[gghh0408]

      if (attachmentFiles != null && attachmentFiles.length > 0) {
        for (File file in attachmentFiles) {
          if (file.existsSync()) {
            MediaType mediaType = MediaType.guessFromFileName(file.path);
            await builder.addFile(file, mediaType);
          }
        }
      }
      MimeMessage mimeMessage = builder.buildMimeMessage(isRequestReadReceipt: isRequestReadReceipt);
      SmtpResponse sendResponse = await client.sendMessage(mimeMessage);

我试了下这样挺正常的，你那边用了高级的api吗

[function2000]

还是一样的：

[gghh0408]

还是一样的：

爱莫能助了哥们，我这边试了下中英文文件都挺正常。我是把他源码复制了一份搞到本地调了一下的。