Android之使用JavaMail发送邮件

            首先，我们原本可以直接通过Intent来调用系统邮件客户端发送邮件，但是这种发送需要跳转activity很不方便，所以我打算自己通过smtp协议发送邮件。很幸运，在google code上有一个现成的javaMail的java邮件客户端，我们只需要调用其中的接口就可以了。下面放出使用javaMail的一个demo源代码。

1.自己封装一个邮件发送类MailSender。

public class MailSender extends Authenticator {


private String user;
private String password;
private Session session;
private String mailhost = "smtp.gmail.com";//默认用gmail发送
private Multipart messageMultipart;
private Properties properties;
static {
Security.addProvider(new JSSEProvider());
}


public MailSender(String user, String password) {
this.user = user;
this.password = password;


properties = new Properties();
properties.setProperty("mail.transport.protocol", "smtp");
properties.setProperty("mail.host", mailhost);
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.port", "465");
properties.put("mail.smtp.socketFactory.port", "465");
properties.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
properties.put("mail.smtp.socketFactory.fallback", "false");
properties.setProperty("mail.smtp.quitwait", "false");


session = Session.getDefaultInstance(properties, this);
messageMultipart=new MimeMultipart();
}


protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user, password);
}


public synchronized void sendMail(String subject, String body,
String sender, String recipients,String attachment) throws Exception {
MimeMessage message = new MimeMessage(session);
message.setSender(new InternetAddress(sender));//邮件发件人
message.setSubject(subject);//邮件主题
//设置邮件内容
BodyPart bodyPart=new MimeBodyPart();
bodyPart.setText(body);
messageMultipart.addBodyPart(bodyPart);
// message.setDataHandler(handler);

//设置邮件附件
if(attachment!=null){
DataSource dataSource=new FileDataSource(attachment);
DataHandler dataHandler=new DataHandler(dataSource);
bodyPart.setDataHandler(dataHandler);
bodyPart.setFileName(attachment.substring(attachment.lastIndexOf("/")+1));
}
message.setContent(messageMultipart);
if (recipients.indexOf(',') > 0)
//多个联系人
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(recipients));
else
//单个联系人
message.setRecipient(Message.RecipientType.TO, new InternetAddress(
recipients));
Transport.send(message);
}


//继承DataSource设置字符编码
public class ByteArrayDataSource implements DataSource {
private byte[] data;
private String type;


public ByteArrayDataSource(byte[] data, String type) {
super();
this.data = data;
this.type = type;
}


public ByteArrayDataSource(byte[] data) {
super();
this.data = data;
}


public void setType(String type) {
this.type = type;
}


public String getContentType() {
if (type == null)
return "application/octet-stream";
else
return type;
}


public InputStream getInputStream() throws IOException {
return new ByteArrayInputStream(data);
}


public String getName() {
return "ByteArrayDataSource";
}


public OutputStream getOutputStream() throws IOException {
throw new IOException("Not Supported");
}


public PrintWriter getLogWriter() throws SQLException {
// TODO Auto-generated method stub
return null;
}


public int getLoginTimeout() throws SQLException {
// TODO Auto-generated method stub
return 0;
}


public void setLogWriter(PrintWriter out) throws SQLException {
// TODO Auto-generated method stub


}


public void setLoginTimeout(int seconds) throws SQLException {
// TODO Auto-generated method stub


}


public boolean isWrapperFor(Class<?> arg0) throws SQLException {
// TODO Auto-generated method stub
return false;
}


public <T> T unwrap(Class<T> arg0) throws SQLException {
// TODO Auto-generated method stub
return null;
}


public Connection getConnection() throws SQLException {
// TODO Auto-generated method stub
return null;
}


public Connection getConnection(String theUsername, String thePassword)
throws SQLException {
// TODO Auto-generated method stub
return null;
}
}


public String getMailhost() {
return mailhost;
}


public void setMailhost(String mailhost) {
this.mailhost = mailhost;
properties.setProperty("mail.host", this.mailhost);
}
}

2.JSSE将帮助处理TLS和SSL业务

public class JSSEProvider extends Provider {


public JSSEProvider() {
        super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");
        AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() {
            public Void run() {
                put("SSLContext.TLS",
                        "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");
                put("Alg.Alias.SSLContext.TLSv1", "TLS");
                put("KeyManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");
                put("TrustManagerFactory.X509",
                        "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");
                return null;
            }
        });
    }
}

3.主activity调用邮件发送类

public class MainActivity extends Activity {


private Button sendButton = null;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sendButton = (Button) this.findViewById(R.id.send_btn);
sendButton.setOnClickListener(new View.OnClickListener() {


public void onClick(View v) {
// TODO Auto-generated method stub
SenderRunnable senderRunnable = new SenderRunnable(
"[e-mail]", "xxxxxxxx");
senderRunnable.setMail("this is the test subject",
"this is the test body", "[e-mail]","/mnt/sdcard/test.txt");
new Thread(senderRunnable).start();
}
});
}


public boolean onCreateOptionsMenu(Menu menu) {
}
//android3.2不允许主线程通信

class SenderRunnable implements Runnable {


private String user;
private String password;
private String subject;
private String body;
private String receiver;
private MailSender sender;
private String attachment;


public SenderRunnable(String user, String password) {
this.user = user;
this.password = password;
sender = new MailSender(user, password);
String mailhost=user.substring(user.lastIndexOf("@")+1, user.lastIndexOf("."));
if(!mailhost.equals("gmail")){
mailhost="smtp."+mailhost+".com";
Log.i("hello", mailhost);
sender.setMailhost(mailhost);
}
}


public void setMail(String subject, String body, String receiver,String attachment) {
this.subject = subject;
this.body = body;
this.receiver = receiver;
this.attachment=attachment;
}


public void run() {
// TODO Auto-generated method stub
try {
sender.sendMail(subject, body, user, receiver,attachment);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

项目全部源码下载地址：http://download.csdn.net/detail/xanxus46/4888658

javaMail地址：http://code.google.com/p/javamail-android/，使用时记得把三个jar包导入构建路径