Android中使用JavaMail发送Email带群发加附件

之前写了一篇关于Android中发送Email的文章，里面用到的是隐式的intent来激活系统自带的邮件发送功能。相关阅读：Android中用intent发送邮件http://www.linuxidc.com/Linux/2013-04/82439.htm今天花了一天来自己实现这个邮件发送功能（主要是网上的代码太坑...）这里用gmail作为发送方的邮箱，其他网易，新浪什么的应该也ok，QQ貌似不行。资源来自：javamail-android下面是实现步骤及相关代码。项目添加jar包将activation.jar,additionnal.jar,mail.jar放到项目的libs 文件夹。然后在项目中选中这三个包，右击->Build Path->Add to buildPath.添加成功后项目就像这样. 项目中添加Mail类package com.example.mailtest;
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 void setTo（String[] toArr） {
this._to = toArr;
} public void setFrom（String string） {
this._from = string;
} public void setSubject（String string） {
this._subject = string;
}
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;
} // more of the getters and setters …..
}