attaching file and sending mail using smtp in android

问题

in my application i'm sending mail using smtp.i want to attach image file to mail.how can i attach it?i tried it.but not getting image in mail.its giving small icon. please help.thanks in advance. below is mailing code and image of mail how it looks-

 public class MailImageFile extends javax.mail.Authenticator {

public MailImageFile(){

}
public void Mail(String user, String pass) {    

    Properties props = new Properties();
    props.put("mail.smtp.host", "smtp.gmail.com");
    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");

    Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(USERNAME, PASSWORD);
        }
        });
    try {

        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(USERNAME));
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(TO));
        message.setSubject("Testing Subject");     
       Multipart multipart = new MimeMultipart();


        MimeBodyPart messageBodyPart = new MimeBodyPart();
        DataSource source = new FileDataSource(new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/wallpaper.jpg"));
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName("image.png");
        messageBodyPart.setDisposition(MimeBodyPart.ATTACHMENT);
        messageBodyPart.setHeader("Content-ID","<vogue>");
        multipart.addBodyPart(messageBodyPart);

                  message.setContent(multipart);

        Transport.send(message);
    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }           
}   
 }

回答1:

you can attach file like this

specify the path in that n it will attach that file

Edited:

Multipart _multipart; = new MimeMultipart();

BodyPart messageBodyPart = new MimeBodyPart();

File sdCard =Environment.getExternalStorageDirectory();     

String path=sdCard.getAbsolutePath() + "/AttendanceSystem/MonthlyReport.xls";

messageBodyPart.setFileName(path);

_multipart.addBodyPart(messageBodyPart);

// Put parts in message 

msg.setContent(_multipart)

do it as per above way i just tested on my device its working n attaching chk itenter code here

回答2:

On second thought:

Use javax.mail.util.ByteArrayDataSource:

Multipart multipart = new MimeMultipart();
DataSource source = new ByteArrayDataSource(imageFile, "image/bmp");

// creates body part for the message
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent("Hi...", "text/html; charset=utf-8");

MimeBodyPart attachPart;
attachPart = new MimeBodyPart();
attachPart .setDataHandler(new DataHandler(source));
attachPart .setFileName(filename);

multipart.addBodyPart(messageBodyPart);
multipart.addBodyPart(attachPart);

message.setContent(multipart);

ByteArrayDataSource's constructor expects as parameters either a byte array or an InputStream. So, if you have your Bitmap in the variable bmp you would get it to the byteArray like this:

ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();

and would use it in the ByteArrayDataSource like this:

DataSource source = new ByteArrayDataSource(byteArray, "image/png");

回答3:

Try this code:

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; 
    } 
} 

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

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

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

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

And for attach file add this code:

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); 
} 

来源：https://stackoverflow.com/questions/15548246/attaching-file-and-sending-mail-using-smtp-in-android