Android使用qq邮箱发送附件代码

下面是使用QQ邮箱发送附件的Android代码示例：

public class MailSender {
    private static final String MAIL_HOST = "smtp.qq.com";
    private static final String SMTP_PORT = "465"; // SSL协议的端口号
    private static final String FROM_ADDRESS = "your_qq_mail@qq.com";
    private static final String PASSWORD = "your_qq_mail_password";
    private static final String TO_ADDRESS = "recipient_address@example.com"; // 收件人邮箱

    public static void send(String subject, String content, String filePath) {
        Properties properties = new Properties();
        properties.put("mail.smtp.host", MAIL_HOST);
        properties.put("mail.smtp.port", SMTP_PORT);
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.ssl.enable", "true");

        Session session = Session.getDefaultInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(FROM_ADDRESS, PASSWORD);
            }
        });

        try {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(FROM_ADDRESS));
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(TO_ADDRESS));
            message.setSubject(subject);

            // 创建邮件正文
            MimeBodyPart textPart = new MimeBodyPart();
            textPart.setContent(content, "text/html;charset=UTF-8");

            // 创建邮件附件
            MimeBodyPart attachmentPart = new MimeBodyPart();
            FileDataSource fileDataSource = new FileDataSource(filePath);
            attachmentPart.setDataHandler(new DataHandler(fileDataSource));
            attachmentPart.setFileName(fileDataSource.getName());

            // 将正文和附件合并到一个Multipart对象中
            MimeMultipart multipart = new MimeMultipart();
            multipart.addBodyPart(textPart);
            multipart.addBodyPart(attachmentPart);

            // 将Multipart对象添加到邮件中
            message.setContent(multipart);

            // 发送邮件
            Transport.send(message);
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

使用时，只需要调用`MailSender.send()`方法，并传入邮件主题、邮件正文和附件文件路径即可。注意修改代码中的`FROM_ADDRESS`、`PASSWORD`和`TO_ADDRESS`为你自己的邮箱地址和密码。