阅读邮件从Gmail发出 | 阅读邮件从Gmail发出

本文介绍了阅读邮件从Gmail发出的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我使用JavaMail来阅读邮件在我的Android应用程序。我试图覆盖所有的组合，即邮件发送/接收到/从自定义服务器/ Gmail的ID / Live ID登录。

该问题出现在一些从Gmail发送带有附件的邮件。我能够接收附件，但内容返回 javax.mail.internet.MimeMultipart@44f2e698

下面是用于接收和读取消息的code：

 属性道具= System.getProperties（）;
    props.setProperty（mail.store.protocol，的imap）;

    尝试 {
     / *创建了会议，并拿到店里进行读邮件。 * /
     会话会话= Session.getInstance（道具，NULL）;
     店中店= session.getStore（IMAPS）;
     store.connect（imap.gmail.com，用户名，密码）;

     / *提到要读取该文件夹的名称。 * /
     文件夹的收件箱= store.getFolder（收件箱）;
     的System.out.println（没有未读邮件+ inbox.getUnreadMessageCount（））;

     / *采用存储打开收件箱。 * /
     inbox.open（Folder.READ_ONLY）;

     留言信息[] = inbox.getMessages（）;
     Log.d（收件箱，消息计数：+ inbox.getMessageCount（））;

     的for（int i = messages.length  -  1; I＆GT; 0; --i）{
         Log.i（ContentType的，ContentType的：+消息[I] .getContentType（））;

         对象msgContent =消息[I] .getContent（）;

         字符串的内容=;

         / *检查内容为纯文本/ HTML或部分* /
         如果（msgContent的instanceof多部分）{

             多节多部分=（多部分）msgContent;

             Log.e（BodyPart的，MultiPartCount：+ multipart.getCount（））;

             对于（INT J = 0; J＆LT; multipart.getCount（）; J ++）{

              BodyPart的正文部分= multipart.getBodyPart（J）;

              字符串处置= bodyPart.getDisposition（）;

              如果（处置= NULL和放大器;！及（disposition.equalsIgnoreCase（附件）））{// BodyPart.ATTACHMENT不适合使用Gmail
                  的System.out.println（邮件有一定的依恋）;

                  DataHandler的处理程序= bodyPart.getDataHandler（）;
                  的System.out.println（文件名：+ handler.getName（））;
                }
              其他 {
                  的System.out.println（内容：+ bodyPart.getContent（））;
                  。内容= bodyPart.getContent（）的toString（）;
                }
            }
         }
         其他
             含量=消息[I] .getContent（）的toString（）。

我知道有问题的邮件内容：

GETFROM 返回该名称，即它有这种格式的名姓和放大器; [email protected]& GT
多部分包含2 BodyParts将：
- BodyPart的1返回含量 javax.mail.internet.MimeMultipart@44f2e698
- BodyPart的2返回正确的名称，附件

解决方案

尝试对 MimeMultiPart类

这可能会返回一个MimeBodyPart可以调用的上的

I am using JavaMail to read mail in my Android app. I have tried to cover all combinations i.e Mail sent/received on/from Custom Server/Gmail ID/Live ID.

The problem occurs with SOME of the mails sent from GMail WITH Attachment. I am able to receive the attachment, but the content returns javax.mail.internet.MimeMultipart@44f2e698

Here's the code used to receive and read messages:

    Properties props = System.getProperties();
    props.setProperty("mail.store.protocol", "imap");

    try {
     /* Create the session and get the store for read the mail. */
     Session session = Session.getInstance(props, null);
     Store store = session.getStore("imaps");
     store.connect("imap.gmail.com", Username, Password);

     /* Mention the folder name which you want to read. */
     Folder inbox = store.getFolder("INBOX");
     System.out.println("No of Unread Messages : " + inbox.getUnreadMessageCount());

     /* Open the inbox using store. */
     inbox.open(Folder.READ_ONLY);

     Message messages[] = inbox.getMessages();
     Log.d("Inbox", "Message Count: "+inbox.getMessageCount());

     for (int i = messages.length - 1 ; i > 0; --i) {
         Log.i("ContentType", "ContentType: "+messages[i].getContentType());

         Object msgContent = messages[i].getContent();

         String content = "";

         /* Check if content is pure text/html or in parts */
         if (msgContent instanceof Multipart) {

             Multipart multipart = (Multipart) msgContent;

             Log.e("BodyPart", "MultiPartCount: "+multipart.getCount());

             for (int j = 0; j < multipart.getCount(); j++) {

              BodyPart bodyPart = multipart.getBodyPart(j);

              String disposition = bodyPart.getDisposition();

              if (disposition != null && (disposition.equalsIgnoreCase("ATTACHMENT"))) { // BodyPart.ATTACHMENT doesn't work for gmail
                  System.out.println("Mail have some attachment");

                  DataHandler handler = bodyPart.getDataHandler();
                  System.out.println("file name : " + handler.getName());
                }
              else {
                  System.out.println("Content: "+bodyPart.getContent());
                  content= bodyPart.getContent().toString();
                }
            }
         }
         else
             content= messages[i].getContent().toString();

What I know about the problematic mails:

getFrom also return the name i.e it comes in this format FirstName LastName &[email protected]&gt
MultiPart contains 2 BodyParts:
- BodyPart 1 returns the content as javax.mail.internet.MimeMultipart@44f2e698
- BodyPart 2 returns the correct name for attachment

解决方案

Try calling getBodyPart on the MimeMultiPart

That probably returns a MimeBodyPart you can call getContent() onhttp://docs.oracle.com/javaee/5/api/javax/mail/internet/MimeBodyPart.html#content

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