android发送邮件（包括附件）

    android发送邮件初期遇到的问题：

    1.发送到QQ邮箱成为垃圾邮件

    2.发送到有些邮箱，没有正文

    经过几次试验，终于能够正常发送邮件了。

    以下是代码：

 

public class MailSender {

    /** * send mail

    * @param mailInfo Info

    */

    public booleansendMail(MailSenderInfomailInfo){

        // Determine whether authentication

        MyAuthenticator authenticator;

        Properties pro=mailInfo.getProperties();

        if (mailInfo.isValidate()){

            // Create a password verifier

            authenticator = new MyAuthenticator(mailInfo.getUserName(),mailInfo.getPassword());

        }

        else {

            return false;

        }

        Session sendMailSession=Session.getDefaultInstance(pro,authenticator);

        try {

            Message mailMessage=new MimeMessage(sendMailSession);

            //Create From Address

            Address from=new InternetAddress(mailInfo.getFromAddress());

            // Set From Address

            mailMessage.setFrom(from);

            // Create To Address

            Address to=new InternetAddress(mailInfo.getToAddress());

            mailMessage.setRecipient(Message.RecipientType.TO,to);

            mailMessage.setSubject(mailInfo.getSubject());

            mailMessage.setSentDate(newDate());

            String mailContent=mailInfo.getContent();

            Multipart mainPart=new MimeMultipart();

            //create body text

            MimeBodyPart body_text=new MimeBodyPart();

            body_text.setText(mailContent);

            mainPart.addBodyPart(body_text);

            //create Attach File

            for (Stringfilename:mailInfo.getAttachFileNames()){

            FileDataSource fileDataSource = new FileDataSource(new File(filename));

            DataHandler dataHandler=new DataHandler(fileDataSource);

            MimeBodyPart mimeBodyPart=new MimeBodyPart();

            mimeBodyPart.setDataHandler(dataHandler);

            try {

                 String fileNameNew=MimeUtility.encodeText(fileDataSource.getName(),"utf-8",null);

                 mimeBodyPart.setFileName(fileNameNew);

            } catch(UnsupportedEncodingExceptione){

                 e.printStackTrace();

                 mimeBodyPart.setFileName(fileDataSource.getName());

            }

            mimeBodyPart.setText(mailInfo.getContent());

            mainPart.addBodyPart(mimeBodyPart);

            mailMessage.setContent(mainPart);

        }

        mailMessage.saveChanges();

        // send email

       Transport.send(mailMessage);

        return true;

    } catch(MessagingExceptionex){

         ex.printStackTrace();

    } returnfalse;

}

 

    class MyAuthenticatorextendsAuthenticator{

        String userName=null;

        String password=null;

        public MyAuthenticator(Stringusername,Stringpassword){

            this.userName=username;this.password=password;

        }

        protected PasswordAuthenticationgetPasswordAuthentication(){

            return newPasswordAuthentication(userName,password);

        }

    }

 

}