android pop3与imap方式接收邮件（javamail）

需要下载3个jar包：mail.jar/    activation.jar/    additionnal.jar

1.pop3

/**  
 * 以pop3方式读取邮件，此方法不能读取邮件是否为已读，已经通过测试  
 * */  
private void getEmail() {  
    List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();  
  
    try {  
        Properties props = System.getProperties();  
        props.put("mail.smtp.host", "smtp.163.com");  
        props.put("mail.smtp.auth", "true");  
        Session session = Session.getDefaultInstance(props, null);  
        URLName urln = new URLName("pop3", "pop3.163.com", 110, null,  
                "邮箱名（没有@163.com）", "密码");  
        // 邮件协议为pop3，邮件服务器是pop3.163.com，端口为110，用户名/密码为abcw111222/123456w  
        Store store = session.getStore(urln);  
        store.connect();  
        Folder folder = store.getFolder("INBOX");  
        folder.open(Folder.READ_WRITE);  
        Message message[] = folder.getMessages();  
        if (message.length > 0) {  
            Map<String, Object> map;  
            System.out.println("Messages's length: " + message.length);  
            ReciveOneMail pmm = null;  
            for (int i = 0; i < message.length; i++) {  
                System.out.println("======================");  
                pmm = new ReciveOneMail((MimeMessage) message[i]);  
                System.out.println("Message " + i + " subject: "  
                        + pmm.getSubject());  
                System.out.println("Message " + i + " sentdate: "  
                        + pmm.getSentDate());  
                System.out.println("Message " + i + " replysign: "  
                        + pmm.getReplySign());  
  
                boolean isRead = pmm.isNew();// 判断邮件是否为已读  
                System.out.println("Message " + i + " hasRead: " + isRead);  
                System.out.println("Message " + i + "  containAttachment: "  
                        + pmm.isContainAttach((Part) message[i]));  
                System.out.println("Message " + i + " form: "  
                        + pmm.getFrom());  
                System.out.println("Message " + i + " to: "  
                        + pmm.getMailAddress("to"));  
                System.out.println("Message " + i + " cc: "  
                        + pmm.getMailAddress("cc"));  
                System.out.println("Message " + i + " bcc: "  
                        + pmm.getMailAddress("bcc"));  
                pmm.setDateFormat("yy年MM月dd日 HH:mm");  
                System.out.println("Message " + i + " sentdate: "  
                        + pmm.getSentDate());  
                System.out.println("Message " + i + " Message-ID: "  
                        + pmm.getMessageId());  
                // 获得邮件内容===============  
                pmm.getMailContent((Part) message[i]);  
                System.out.println("Message " + i + " bodycontent: 
"  
                        + pmm.getBodyText());  
                String file_path = File.separator + "mnt" + File.separator  
                        + "sdcard" + File.separator;  
                System.out.println(file_path);  
                pmm.setAttachPath(file_path);  
                pmm.saveAttachMent((Part) message[i]);  
  
                map = new HashMap<String, Object>();  
                map.put("from", pmm.getFrom());  
                map.put("title", pmm.getSubject());  
                map.put("time", pmm.getSentDate());  
                map.put("read", isRead);  
                list.add(map);  
            }  
            SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,  
                    list, R.layout.item_receiveemail, new String[] {  
                            "from", "title", "time", "read" }, new int[] {  
                            R.id.item_receive_sendname,  
                            R.id.item_receive_title,  
                            R.id.item_receive_sendtime,  
                            R.id.item_receive_read });  
            lv.setAdapter(adapter);  
  
        } else {  
            Toast.makeText(MainActivity.this, "没有邮件", Toast.LENGTH_SHORT)  
                    .show();  
        }  
    } catch (NoSuchProviderException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    } catch (MessagingException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    } catch (Exception e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }  
}  

2.imap方式

/**  
 * 以imap方式读取邮件，可以判定读取邮件是否为已读  
 * */  
private void getImapEmail() {  
    String user = "abcw111222@163.com";// 邮箱的用户名  
    String password = "123456w"; // 邮箱的密码  
  
    Properties prop = System.getProperties();  
    prop.put("mail.store.protocol", "imap");  
    prop.put("mail.imap.host", "imap.163.com");  
  
    Session session = Session.getInstance(prop);  
  
    int total = 0;  
    IMAPStore store;  
    try {  
        store = (IMAPStore) session.getStore("imap"); // 使用imap会话机制，连接服务器  
  
        store.connect(user, password);  
  
        IMAPFolder folder = (IMAPFolder) store.getFolder("INBOX"); // 收件箱  
        folder.open(Folder.READ_WRITE);  
        // 获取总邮件数  
        total = folder.getMessageCount();  
        System.out.println("---共有邮件：" + total + " 封---");  
        // 得到收件箱文件夹信息，获取邮件列表  
        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();  
        System.out.println("未读邮件数：" + folder.getUnreadMessageCount());  
        Message[] messages = folder.getMessages();  
        if (messages.length > 0) {  
            Map<String, Object> map;  
            System.out.println("Messages's length: " + messages.length);  
            ReciveOneMail pmm = null;  
            for (int i = 0; i < messages.length; i++) {  
                System.out.println("======================");  
                pmm = new ReciveOneMail((MimeMessage) messages[i]);  
                System.out.println("Message " + i + " subject: "  
                        + pmm.getSubject());  
                try {  
                    System.out.println("Message " + i + " sentdate: "  
                            + pmm.getSentDate());  
                    System.out.println("Message " + i + " replysign: "  
                            + pmm.getReplySign());  
  
                    boolean isRead;// 用来判断该邮件是否为已读  
                    String read;  
                    Flags flags = messages[i].getFlags();  
                    if (flags.contains(Flags.Flag.SEEN)) {  
                        System.out.println("这是一封已读邮件");  
                        isRead = true;  
                        read = "已读";  
                    } else {  
                        System.out.println("未读邮件");  
                        isRead = false;  
                        read = "未读";  
                    }  
                    System.out.println("Message " + i + " hasRead: "  
                            + isRead);  
                    System.out.println("Message " + i  
                            + "  containAttachment: "  
                            + pmm.isContainAttach((Part) messages[i]));  
                    System.out.println("Message " + i + " form: "  
                            + pmm.getFrom());  
                    System.out.println("Message " + i + " to: "  
                            + pmm.getMailAddress("to"));  
                    System.out.println("Message " + i + " cc: "  
                            + pmm.getMailAddress("cc"));  
                    System.out.println("Message " + i + " bcc: "  
                            + pmm.getMailAddress("bcc"));  
                    pmm.setDateFormat("yy年MM月dd日 HH:mm");  
                    System.out.println("Message " + i + " sentdate: "  
                            + pmm.getSentDate());  
                    System.out.println("Message " + i + " Message-ID: "  
                            + pmm.getMessageId());  
                    // 获得邮件内容===============  
                    pmm.getMailContent((Part) messages[i]);  
                    System.out.println("Message " + i  
                            + " bodycontent: 
" + pmm.getBodyText());  
                    String file_path = File.separator + "mnt"  
                            + File.separator + "sdcard" + File.separator;  
                    System.out.println(file_path);  
                    pmm.setAttachPath(file_path);  
                    pmm.saveAttachMent((Part) messages[i]);  
  
                    map = new HashMap<String, Object>();  
                    map.put("from", pmm.getFrom());  
                    map.put("title", pmm.getSubject());  
                    map.put("time", pmm.getSentDate());  
                    map.put("read", read);  
                    list.add(map);  
                } catch (Exception e) {  
                    // TODO Auto-generated catch block  
                    e.printStackTrace();  
                }  
  
            }  
            SimpleAdapter adapter = new SimpleAdapter(MainActivity.this,  
                    list, R.layout.item_receiveemail, new String[] {  
                            "from", "title", "time", "read" }, new int[] {  
                            R.id.item_receive_sendname,  
                            R.id.item_receive_title,  
                            R.id.item_receive_sendtime,  
                            R.id.item_receive_read });  
            lv.setAdapter(adapter);  
        }  
    } catch (javax.mail.NoSuchProviderException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    } catch (MessagingException e) {  
        // TODO Auto-generated catch block  
        e.printStackTrace();  
    }  
  
}  

下面为用到的一个类，用来读取除了判断是否已读的信息之外的内容

/**  
 * 接收邮箱中的邮件，可以接收带附件的  
 * （目前接收的邮件中含有中文内容，会出现乱码，但是标题不会乱码）  
 * 邮件中的内容如果用专门的阅读器也不会出现乱码现象，图片等都可以下载  
 * */  
@SuppressLint("DefaultLocale")  
public class ReciveOneMail {  
  
    private MimeMessage mimeMessage = null;  
    private String saveAttachPath = ""; // 附件下载后的存放目录  
    private StringBuffer bodytext = new StringBuffer();// 存放邮件内容  
    private String dateformat = "yy-MM-dd HH:mm"; // 默认的日前显示格式  
  
    public ReciveOneMail(MimeMessage mimeMessage) {  
        this.mimeMessage = mimeMessage;  
    }  
  
    public void setMimeMessage(MimeMessage mimeMessage) {  
        this.mimeMessage = mimeMessage;  
    }  
  
    /**  
     * 获得发件人的地址和姓名  
     */  
    public String getFrom() throws Exception {  
        InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom();  
        String from = address[0].getAddress();  
        if (from == null)  
            from = "";  
        String personal = address[0].getPersonal();  
        if (personal == null)  
            personal = "";  
        String fromaddr = personal + "<" + from + ">";  
        return fromaddr;  
    }  
  
    /**  
     * 获得邮件的收件人，抄送，和密送的地址和姓名，根据所传递的参数的不同 "to"----收件人 "cc"---抄送人地址 "bcc"---密送人地址  
     */  
    @SuppressLint("DefaultLocale")  
    public String getMailAddress(String type) throws Exception {  
        String mailaddr = "";  
        String addtype = type.toUpperCase();  
        InternetAddress[] address = null;  
        if (addtype.equals("TO") || addtype.equals("CC")  
                || addtype.equals("BCC")) {  
            if (addtype.equals("TO")) {  
                address = (InternetAddress[]) mimeMessage  
                        .getRecipients(Message.RecipientType.TO);  
            } else if (addtype.equals("CC")) {  
                address = (InternetAddress[]) mimeMessage  
                        .getRecipients(Message.RecipientType.CC);  
            } else {  
                address = (InternetAddress[]) mimeMessage  
                        .getRecipients(Message.RecipientType.BCC);  
            }  
            if (address != null) {  
                for (int i = 0; i < address.length; i++) {  
                    String email = address[i].getAddress();  
                    if (email == null)  
                        email = "";  
                    else {  
                        email = MimeUtility.decodeText(email);  
                    }  
                    String personal = address[i].getPersonal();  
                    if (personal == null)  
                        personal = "";  
                    else {  
                        personal = MimeUtility.decodeText(personal);  
                    }  
                    String compositeto = personal + "<" + email + ">";  
                    mailaddr += "," + compositeto;  
                }  
                mailaddr = mailaddr.substring(1);  
            }  
        } else {  
            throw new Exception("Error emailaddr type!");  
        }  
        return mailaddr;  
    }  
  
    /**  
     * 获得邮件主题  
     */  
    public String getSubject() throws MessagingException {  
        String subject = "";  
        try {  
            subject = MimeUtility.decodeText(mimeMessage.getSubject());  
            if (subject == null)  
                subject = "";  
        } catch (Exception exce) {  
        }  
        return subject;  
    }  
  
    /**  
     * 获得邮件发送日期  
     */  
    @SuppressLint("SimpleDateFormat")  
    public String getSentDate() throws Exception {  
        Date sentdate = mimeMessage.getSentDate();  
        SimpleDateFormat format = new SimpleDateFormat(dateformat);  
        return format.format(sentdate);  
    }  
  
    /**  
     * 获得邮件正文内容  
     */  
    public String getBodyText() {  
        return bodytext.toString();  
    }  
  
    /**  
     * 解析邮件，把得到的邮件内容保存到一个StringBuffer对象中，解析邮件 主要是根据MimeType类型的不同执行不同的操作，一步一步的解析  
     */  
    public void getMailContent(Part part) throws Exception {  
        String contenttype = part.getContentType();  
        int nameindex = contenttype.indexOf("name");  
        boolean conname = false;  
        if (nameindex != -1)  
            conname = true;  
        System.out.println("CONTENTTYPE: " + contenttype);  
        if (part.isMimeType("text/plain") && !conname) {  
            bodytext.append((String) part.getContent());  
        } else if (part.isMimeType("text/html") && !conname) {  
            bodytext.append((String) part.getContent());  
        } else if (part.isMimeType("multipart/*")) {  
            Multipart multipart = (Multipart) part.getContent();  
            int counts = multipart.getCount();  
            for (int i = 0; i < counts; i++) {  
                getMailContent(multipart.getBodyPart(i));  
            }  
        } else if (part.isMimeType("message/rfc822")) {  
            getMailContent((Part) part.getContent());  
        } else {  
        }  
    }  
  
    /**  
     * 判断此邮件是否需要回执，如果需要回执返回"true",否则返回"false"  
     */  
    public boolean getReplySign() throws MessagingException {  
        boolean replysign = false;  
        String needreply[] = mimeMessage  
                .getHeader("Disposition-Notification-To");  
        if (needreply != null) {  
            replysign = true;  
        }  
        return replysign;  
    }  
  
    /**  
     * 获得此邮件的Message-ID  
     */  
    public String getMessageId() throws MessagingException {  
        return mimeMessage.getMessageID();  
    }  
  
    /**  
     * 【判断此邮件是否已读，如果未读返回返回false,反之返回true】pop3协议使用时不能判断。  
     */  
    public boolean isNew() throws MessagingException {  
        boolean isnew = false;//由于isnew设为false所以每次显示的都为未读  
        Flags flags = ((Message) mimeMessage).getFlags();  
        System.out.println("--------flags-------" + flags);  
        Flags.Flag[] flag = flags.getSystemFlags();  
        System.out.println("----flag----" + flag);  
        System.out.println("flags's length: " + flag.length);  
        for (int i = 0; i < flag.length; i++) {  
            System.out.println("flag=======" + flag[i]);  
            System.out.println("-=-=-=Flags.Flag.SEEN=-=-=-="+Flags.Flag.SEEN);  
            if (flag[i] == Flags.Flag.SEEN) {  
                isnew = true;  
                System.out.println("seen Message.......");  
                break;  
            }  
        }  
        return isnew;  
    }  
  
    /**  
     * 判断此邮件是否包含附件  
     */  
    @SuppressLint("DefaultLocale")  
    public boolean isContainAttach(Part part) throws Exception {  
        boolean attachflag = false;  
        // String contentType = part.getContentType();  
        if (part.isMimeType("multipart/*")) {  
            Multipart mp = (Multipart) part.getContent();  
            for (int i = 0; i < mp.getCount(); i++) {  
                BodyPart mpart = mp.getBodyPart(i);  
                String disposition = mpart.getDisposition();  
                if ((disposition != null)  
                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition  
                                .equals(Part.INLINE))))  
                    attachflag = true;  
                else if (mpart.isMimeType("multipart/*")) {  
                    attachflag = isContainAttach((Part) mpart);  
                } else {  
                    String contype = mpart.getContentType();  
                    if (contype.toLowerCase().indexOf("application") != -1)  
                        attachflag = true;  
                    if (contype.toLowerCase().indexOf("name") != -1)  
                        attachflag = true;  
                }  
            }  
        } else if (part.isMimeType("message/rfc822")) {  
            attachflag = isContainAttach((Part) part.getContent());  
        }  
        return attachflag;  
    }  
  
    /**  
     * 【保存附件】  
     */  
    @SuppressLint("DefaultLocale")  
    public void saveAttachMent(Part part) throws Exception {  
        String fileName = "";  
        if (part.isMimeType("multipart/*")) {  
            Multipart mp = (Multipart) part.getContent();  
            for (int i = 0; i < mp.getCount(); i++) {  
                BodyPart mpart = mp.getBodyPart(i);//主体部分得到处理  
                String disposition = mpart.getDisposition();  
                if ((disposition != null)  
                        && ((disposition.equals(Part.ATTACHMENT)) || (disposition  
                                .equals(Part.INLINE)))) {//ATTACHMENT附件，INLINE嵌入  
                    fileName = mpart.getFileName();  
                    if (fileName.toLowerCase().indexOf("gb18030") != -1) {  
                        fileName = MimeUtility.decodeText(fileName);  
                    }  
                    saveFile(fileName, mpart.getInputStream());  
                } else if (mpart.isMimeType("multipart/*")) {  
                    saveAttachMent(mpart);  
                } else {  
                    fileName = mpart.getFileName();  
                    if ((fileName != null)  
                            && (fileName.toLowerCase().indexOf("GB18030") != -1)) {  
                        fileName = MimeUtility.decodeText(fileName);  
                        saveFile(fileName, mpart.getInputStream());  
                    }  
                }  
            }  
        } else if (part.isMimeType("message/rfc822")) {  
            saveAttachMent((Part) part.getContent());  
        }  
    }  
  
    /**  
     * 【设置附件存放路径】  
     */  
  
    public void setAttachPath(String attachpath) {  
        this.saveAttachPath = attachpath;  
    }  
  
    /**  
     * 【设置日期显示格式】  
     */  
    public void setDateFormat(String format) throws Exception {  
        this.dateformat = format;  
    }  
  
    /**  
     * 【获得附件存放路径】  
     */  
    public String getAttachPath() {  
        return saveAttachPath;  
    }  
  
    /**  
     * 【真正的保存附件到指定目录里】  
     */  
    @SuppressLint("DefaultLocale")  
    private void saveFile(String fileName, InputStream in) throws Exception {  
        String osName = System.getProperty("os.name");  
        System.out.println("----fileName----" + fileName);  
        // String storedir = getAttachPath();  
//      String separator = "";  
        if (osName == null)  
            osName = "";  
        File storefile = new File(File.separator + "mnt" + File.separator  
                + "sdcard" + File.separator + fileName);  
  
        storefile.createNewFile();  
        System.out.println("storefile's path: " + storefile.toString());  
//       for(int i=0;storefile.exists();i++){  
//       storefile = new File(storedir+separator+fileName+i);  
//       }  
  
        BufferedOutputStream bos = null;  
        BufferedInputStream bis = null;  
        try {  
            bos = new BufferedOutputStream(new FileOutputStream(storefile));  
            bis = new BufferedInputStream(in);  
            int c;  
            while ((c = bis.read()) != -1) {  
                bos.write(c);  
                bos.flush();  
            }  
        } catch (Exception exception) {  
            exception.printStackTrace();  
            throw new Exception("文件保存失败!");  
        } finally {  
            bos.close();  
            bis.close();  
        }  
    }  
}