在android中以编程方式发送带有MS Excel文件（来自sdCard）附件的邮件

Question

经过一些研究后，我设法通过以下步骤here直接从我的应用程序发送电子邮件，而不启动任何邮件应用

但现在我想添加一个MS Excel文件作为附件

我不知道如何

正如我从这段代码中所理解的那样：

   public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception {   
    try{
    MimeMessage message = new MimeMessage(session);   
    DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain"));   
    message.setSender(new InternetAddress(sender));   
    message.setSubject(subject);   
    message.setDataHandler(handler);   
    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){

    }
}

我在后台asynctask中调用上面的方法来发送消息，但有没有办法添加MS Excel文件附件

Answer 1

带文件参数的修改函数（信用转到https://stackoverflow.com/a/6222546/2829009）：

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){

    }
}

用法：

sendMail("Subject", "Body text", "test@test.com", "test1@test.com", new File("/mnt/sdcard/ExcelFile.xls"));

Answer 2

我只是发现这个链接允许使用附件programmaticaly仅使用一个类

发送邮件

这里是：

    import java.util.Date;
import java.util.Properties;
import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
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 Mail extends javax.mail.Authenticator {
    private String _user;
    private String _pass;

    private String[] _to;
    private String _from;

    private String _port;
    private String _sport;

    private String _host;

    private String _subject;
    private String _body;

    private boolean _auth;

    private boolean _debuggable;

    private Multipart _multipart;

    public Mail() {
        _host = "smtp.gmail.com"; // default smtp server
        _port = "465"; // default smtp port
        _sport = "465"; // default socketfactory port

        _user = ""; // username
        _pass = ""; // password
        _from = ""; // email sent from
        _subject = ""; // email subject
        _body = ""; // email body

        _debuggable = false; // debug mode on or off - default off
        _auth = true; // smtp authentication - default on

        _multipart = new MimeMultipart();

        // There is something wrong with MailCap, javamail can not find a
        // handler for the multipart/mixed part, so this bit needs to be added.
        MailcapCommandMap mc = (MailcapCommandMap) CommandMap
                .getDefaultCommandMap();
        mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html");
        mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml");
        mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain");
        mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed");
        mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822");
        CommandMap.setDefaultCommandMap(mc);
    }

    public Mail(String user, String pass) {
        this();

        _user = user;
        _pass = pass;
    }

    public boolean send() throws Exception {
        Properties props = _setProperties();

        if (!_user.equals("") && !_pass.equals("") && _to.length > 0
                && !_from.equals("") && !_subject.equals("")
                && !_body.equals("")) {
            Session session = Session.getInstance(props, this);

            MimeMessage msg = new MimeMessage(session);

            msg.setFrom(new InternetAddress(_from));

            InternetAddress[] addressTo = new InternetAddress[_to.length];
            for (int i = 0; i < _to.length; i++) {
                addressTo[i] = new InternetAddress(_to[i]);
            }
            msg.setRecipients(MimeMessage.RecipientType.TO, addressTo);

            msg.setSubject(_subject);
            msg.setSentDate(new Date());

            // setup message body
            BodyPart messageBodyPart = new MimeBodyPart();
            messageBodyPart.setText(_body);
            _multipart.addBodyPart(messageBodyPart);

            // Put parts in message
            msg.setContent(_multipart);

            // send email
            Transport.send(msg);

            return true;
        } else {
            return false;
        }
    }

    public void addAttachment(String filename) throws Exception {
        BodyPart messageBodyPart = new MimeBodyPart();
        DataSource source = new FileDataSource(filename);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName(filename);

        _multipart.addBodyPart(messageBodyPart);
    }

    @Override
    public PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(_user, _pass);
    }

    private Properties _setProperties() {
        Properties props = new Properties();

        props.put("mail.smtp.host", _host);

        if (_debuggable) {
            props.put("mail.debug", "true");
        }

        if (_auth) {
            props.put("mail.smtp.auth", "true");
        }

        props.put("mail.smtp.port", _port);
        props.put("mail.smtp.socketFactory.port", _sport);
        props.put("mail.smtp.socketFactory.class",
                "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");

        return props;
    }

    // the getters and setters
    public String getBody() {
        return _body;
    }

    public void setBody(String _body) {
        this._body = _body;
    }

    public String[] get_to() {
        return _to;
    }

    public void setTo(String[] _to) {
        this._to = _to;
    }

    public String get_from() {
        return _from;
    }

    public void setFrom(String _from) {
        this._from = _from;
    }

    public String get_subject() {
        return _subject;
    }

    public void setSubject(String _subject) {
        this._subject = _subject;
    }



    // more of the getters and setters …..
}

以下是使用它的示例：

new AsyncTask<String, String, String>() {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            Utils.getProgressDialog(CheckedListActivity.this);
        }

        boolean success = false;

        @Override
        protected String doInBackground(String... params) {

            Mail m = new Mail("username@gmail.com", "password"); 

              String[] toArr = {"sdfdfvg@gmail.com", "sdcfsdfdsf@hotmail.com"}; 
              m.setTo(toArr); 
              m.setFrom("username@gmail.com"); 
              m.setSubject("MyApp COMMANDE TEST"); 
              m.setBody("MyApp COMMANDE TEST contenu"); 

              try { 
                m.addAttachment("/sdcard/MyAPP/liste_clients.xls"); 

                if(m.send()) { 
                    success = true;                 
                } else { 
                    success = false;                      
                } 
              } catch(Exception e) {                   
                Log.e("MailApp", "Could not send email", e); 
              } 
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            Utils.dismissProgressDialog();

            if(success){
                Utils.showAlertDialog(CheckedListActivity.this, "Envoi reussi", "Votre message est envoyé avec succée");
            }else{
                Utils.showAlertDialog(CheckedListActivity.this, "Echec d'envoi", "Votre message n'est pas envoyé, veuillez ressayer");
            }


        }

    }.execute();

并且实时接收邮件，而其他类

则不然

这是src链接：here

当然我们必须添加那些jar：

mail

activation

additionnal

我希望它有所帮助