JavaMail和电子邮件帐户的连接

我尝试使用javamail连接电子邮件-在非android应用程序中，此代码运行良好：

public void perform(View v){
    Toast.makeText(getApplicationContext(), "Validating...",
               Toast.LENGTH_SHORT).show();



    new LoginIn().execute();


}
 private class LoginIn extends AsyncTask<Void, Void, Void> {


        @Override
        protected Void doInBackground(Void... arg0) {
            Properties props = new Properties();
             props.put("mail.smtp.host", "smtp.gmail.com");
             props.put("mail.stmp.user", "sample@gmail.com");          
             //If you want you use TLS 
             props.put("mail.smtp.auth", "true");
               props.put("mail.smtp.starttls.enable", "true");
             props.put("mail.smtp.password", "password of the sender");
             // If you want to use SSL
             props.put("mail.smtp.socketFactory.port", "465");
             props.put("mail.smtp.socketFactory.class",
                                       "javax.net.ssl.SSLSocketFactory");
             props.put("mail.smtp.auth", "true");
             props.put("mail.smtp.port", "465");

             props.put("mail.smtp.starttls.enable", "true");

             Session session = Session.getDefaultInstance(props);

             Transport trans;
             try {
                 trans = session.getTransport("smtp");
                 trans.connect("smtp.live.com", 25, "sample@gmail.com", "asdasd");
             } catch (NoSuchProviderException e) {
                 e.printStackTrace();
             }catch (MessagingException e) {
                 e.printStackTrace();
             }
             return null;
        }

 }

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我已经读到我应该在asynctask中这样做，所以我做了，但没有帮助。有人能帮我吗？应用程序告诉我“应用程序可能在其主线程上做了太多的工作”，但我尝试在其他线程中这样做？

您的类路径设置正确吗

Caused by: java.lang.NoClassDefFoundError: javax.mail.Session

---

我在java项目中使用了mail.smtp。 下面是我帮助您的代码

    package com.agileinfotech.bsviewer.service;

    import java.util.Properties;

    import javax.activation.DataHandler;
    import javax.activation.DataSource;
    import javax.activation.FileDataSource;
    import javax.mail.BodyPart;
    import javax.mail.Message;
    import javax.mail.Multipart;
    import javax.mail.PasswordAuthentication;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;

    public class MailUtil {
        public final String username = "abcxyz@gmail.com";
        public final String password = "******";

        public void mailSuccAtt(String sch_Id, String jb_status, String filename,String documentName, String mail) {

            System.out.println("in the mail util tname of list is  " + mail);

            try {
                if (jb_status.equals("Completed")) {
                    Properties pros = new Properties();
                    pros.put("mail.smtp.auth", "true");
                    pros.put("mail.smtp.starttls.enable", "true");
                    pros.put("mail.smtp.host", "smtp.gmail.com");
                    pros.put("mail.smtp.port", "587");

                    Session session = Session.getInstance(pros,
                            new javax.mail.Authenticator() {
                                protected PasswordAuthentication getPasswordAuthentication() {
                                    return new PasswordAuthentication(
                                            username, password);
                                }
                            });

                    MimeMessage msg = new MimeMessage(session);
                    msg.setFrom(new InternetAddress(username));
                    msg.setRecipient(Message.RecipientType.TO, new InternetAddress(
                            mail));
                    msg.setSubject("Attached Demo");

                    BodyPart messageBodyPart = new MimeBodyPart();
                    messageBodyPart.setText("Hello " + "\n\n Status of " + sch_Id
                            + " is " + jb_status);

                    Multipart multipart = new MimeMultipart();
                    multipart.addBodyPart(messageBodyPart);

                    messageBodyPart = new MimeBodyPart();
                    DataSource source = new FileDataSource(filename);
                    messageBodyPart.setDataHandler(new DataHandler(source));
                    messageBodyPart.setFileName(documentName);
                    multipart.addBodyPart(messageBodyPart);

                    msg.setContent(multipart);

                    Transport.send(msg);

                    //System.out.println("Mail Sent");

                }
            } catch (Exception e) {
    e.printStackTrace();
            }
        }

    }

    package com.agileinfotech.bsviewer.service;

    import java.util.Properties;

    import javax.activation.DataHandler;
    import javax.activation.DataSource;
    import javax.activation.FileDataSource;
    import javax.mail.BodyPart;
    import javax.mail.Message;
    import javax.mail.Multipart;
    import javax.mail.PasswordAuthentication;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;

    public class MailUtil {
        public final String username = "abcxyz@gmail.com";
        public final String password = "******";

        public void mailSuccAtt(String sch_Id, String jb_status, String filename,String documentName, String mail) {

            System.out.println("in the mail util tname of list is  " + mail);

            try {
                if (jb_status.equals("Completed")) {
                    Properties pros = new Properties();
                    pros.put("mail.smtp.auth", "true");
                    pros.put("mail.smtp.starttls.enable", "true");
                    pros.put("mail.smtp.host", "smtp.gmail.com");
                    pros.put("mail.smtp.port", "587");

                    Session session = Session.getInstance(pros,
                            new javax.mail.Authenticator() {
                                protected PasswordAuthentication getPasswordAuthentication() {
                                    return new PasswordAuthentication(
                                            username, password);
                                }
                            });

                    MimeMessage msg = new MimeMessage(session);
                    msg.setFrom(new InternetAddress(username));
                    msg.setRecipient(Message.RecipientType.TO, new InternetAddress(
                            mail));
                    msg.setSubject("Attached Demo");

                    BodyPart messageBodyPart = new MimeBodyPart();
                    messageBodyPart.setText("Hello " + "\n\n Status of " + sch_Id
                            + " is " + jb_status);

                    Multipart multipart = new MimeMultipart();
                    multipart.addBodyPart(messageBodyPart);

                    messageBodyPart = new MimeBodyPart();
                    DataSource source = new FileDataSource(filename);
                    messageBodyPart.setDataHandler(new DataHandler(source));
                    messageBodyPart.setFileName(documentName);
                    multipart.addBodyPart(messageBodyPart);

                    msg.setContent(multipart);

                    Transport.send(msg);

                    //System.out.println("Mail Sent");

                }
            } catch (Exception e) {
    e.printStackTrace();
            }
        }

    }