Android发送邮件

   刚做完一个Android的小项目，其中有一个功能需要发送邮件到公司的邮箱，找了好多方法和文章，最后在一个国外网站找到一个简单有用的。在贴代码之前，先把需要的jar包下载地址贴出来：http://download.csdn.net/detail/jimoduwu/3738227。将下载后的三个jar包导入到Eclipse后，新建类Mail.java，直接粘贴下面代码到Mail.jar。

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 get_user() {
return _user;
}

public String get_body() {
return _body;
}

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

public void set_user(String _user) {
this._user = _user;
}

public String get_pass() {
return _pass;
}

public void set_pass(String _pass) {
this._pass = _pass;
}

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

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

public String get_from() {
return _from;
}

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

public String get_port() {
return _port;
}

public void set_port(String _port) {
this._port = _port;
}

public String get_sport() {
return _sport;
}

public void set_sport(String _sport) {
this._sport = _sport;
}

public String get_host() {
return _host;
}

public void set_host(String _host) {
this._host = _host;
}

public String get_subject() {
return _subject;
}

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

public boolean is_auth() {
return _auth;
}

public void set_auth(boolean _auth) {
this._auth = _auth;
}

public boolean is_debuggable() {
return _debuggable;
}

public void set_debuggable(boolean _debuggable) {
this._debuggable = _debuggable;
}

public Multipart get_multipart() {
return _multipart;
}

public void set_multipart(Multipart _multipart) {
this._multipart = _multipart;
}
}//Mail.java结束

//Mail.java结束

//Mail.java结束

然后在你的主Activity的onCreate方法（只是举例）里面贴下述代码：

Mail m = new Mail("发送邮件的地址@gmail.com", "发送邮件的邮箱密码");


String[] toArr = { "接受者[e-mail]", "接受者[e-mail]" };
m.set_to(toArr);
m.set_from("[e-mail]");
m.set_subject("邮件主题");
m.set_body("邮件的正文");


try {
m.addAttachment(“你需要添加的文件的路径”);
if (m.send()) {
//发送成功
} else {
//未发送出去
}
} catch (Exception e) {
//网络或IO等异常
}

//主Activity结束

//主Activity结束

//主Activity结束

记得在Android清单里面赋予app访问网络的权限，添加附件还得赋予访问SDCard的权限。

OK了，现在可以运行程序了，我用的是三星的Android pad，用WiFi连接网络。

你看到的是Android开发Hello的那个黑色UI，因为我们什么控件都没有添加，但是邮件已经发送出去了，到你的接受者邮箱去查看，你会看到从你的Android设备发送的邮件了。