Android应用程序开发-不带任何意图直接发送电子邮件

import javax.mail.*;
import javax.mail.internet.*;
import java.util.Properties;

public class EmailSender extends AsyncTask<Void, Void, Void> {
    private String email;
    private String password;
    private String recipient;
    private String subject;
    private String message;

    public EmailSender(String email, String password, String recipient, String subject, String message) {
        this.email = email;
        this.password = password;
        this.recipient = recipient;
        this.subject = subject;
        this.message = message;
    }

    @Override
    protected Void doInBackground(Void... params) {
        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.exmail.qq.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(email, password);
                    }
                });

        try {
            MimeMessage mimeMessage = new MimeMessage(session);
            mimeMessage.setFrom(new InternetAddress(email));
            mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(recipient));
            mimeMessage.setSubject(subject);
            mimeMessage.setText(message);

            Transport.send(mimeMessage);
        } catch (MessagingException e) {
            e.printStackTrace();
        }

        return null;
    }
}

String email = "your_email@example.com";
String password = "your_password";
String recipient = "recipient@example.com";
String subject = "Test Email";
String message = "This is a test email.";

EmailSender emailSender = new EmailSender(email, password, recipient, subject, message);
emailSender.execute();