Stuck trying to send pdf with SmtpApi

[VivianaGarces]

Hi, thanks for this library,
I'm trying to send a PDF through Smtp, I have a template and successfully sent an email without attachment but when I try to add the attachment it gets stuck and never reaches the send part, this is the code I'm using (Already tested that file exists):

            SmtpApi apiInstance = new SmtpApi();

            SendSmtpEmail sendSmtpEmail = new SendSmtpEmail(); // SendSmtpEmail | Values to send a transactional email
            sendSmtpEmail.setTemplateId(1L);
            SendSmtpEmailTo remitent = new SendSmtpEmailTo();
            remitent.email("mytestemail@gmail.com");
            sendSmtpEmail.setTo(new ArrayList(Arrays.asList(remitent)));
            SendSmtpEmailAttachment attachment = new SendSmtpEmailAttachment();
            try {
                File f = new File(Environment.getExternalStorageDirectory() + "/someFolder/test.pdf");
                InputStream fis = new FileInputStream(f);
                long length = f.length();
                if (length > Integer.MAX_VALUE) {
                    Log.e("MainActivity", "cannnottt   readddd");
                }
                byte[] bytes = new byte[(int) length];
                int offset = 0;
                int numRead = 0;
                while (offset < bytes.length && (numRead = fis.read(bytes, offset, bytes.length - offset)) >= 0) {
                    offset += numRead;
                }
                attachment.setContent(bytes);
            } catch (Exception ex) {
                ex.printStackTrace();
            }
           
            sendSmtpEmail.setAttachment(Collections.singletonList(attachment));
            try {
                CreateSmtpEmail result = apiInstance.sendTransacEmail(sendSmtpEmail);
                System.out.println(result);
            } catch (ApiException e) {
                System.err.println("Exception when calling SmtpApi#sendTransacEmail");
                e.printStackTrace();
            } 

sendSmtpEmail.setAttachment(Collections.singletonList(attachment)); is the problematic line

[VivianaGarces]

I had to add this code to make it work, I'm leaving it here in case someone gets this issue too.

     byte[] bArr = Base64.getEncoder().encodeToString(bytes).getBytes();
     attachment.setName("test.pdf");
     attachment.setContent(bArr);