This link may be useful .....
http://www.jondev.net/articles/Sending_Emails_without_User_Intervention_%28no_Intents%29_in_Android
make changes to the sendMail section for attachment.
public synchronized void sendMail(String subject, String body, String sender, String recipients, File attachment) throws Exception { try{ MimeMessage message = new MimeMessage(session); message.setSender(new InternetAddress(sender)); message.setSubject(subject);MimeBodyPart mbp1 = new MimeBodyPart(); mbp1.setText(body); MimeBodyPart mbp2 = new MimeBodyPart(); FileDataSource fds = new FileDataSource(attachment); mbp2.setDataHandler(new DataHandler(fds)); mbp2.setFileName(fds.getName()); Multipart mp = new MimeMultipart(); mp.addBodyPart(mbp1); mp.addBodyPart(mbp2); message.setContent(mp); if (recipients.indexOf(',') > 0) message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients)); else message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients)); Transport.send(message); }catch(Exception e){ } }`
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