在 Android 上使用 JavaMail 对电子邮件进行身份验证

Question

我正在制作一个 android 应用程序，我需要从应用程序内部发送和发送电子邮件（不使用意图），所以我在网上搜索并最终决定使用 JavaMail API。 我已经构建了使用 Gmail 电子邮件提供用户电子邮件和密码的代码，但不幸的是，谷歌阻止了我的电子邮件，搜索我发现了这个link，所以显然谷歌已经将他们的身份验证协议更改为 oauth2，而 JavaMail 没有支持它（我认为它不支持它）。 我搜索了整个网络，但无法弄清楚如何解决它。 有没有办法让它再次工作？ 这是我的代码：

GMailSender.java：

package com.example.helloworld;

import javax.activation.DataHandler;   
import javax.activation.DataSource;   
import javax.mail.Message;   
import javax.mail.PasswordAuthentication;   
import javax.mail.Session;   
import javax.mail.Transport;   
import javax.mail.internet.InternetAddress;   
import javax.mail.internet.MimeMessage;   
import java.io.ByteArrayInputStream;   
import java.io.IOException;   
import java.io.InputStream;   
import java.io.OutputStream;   
import java.security.Security;   
import java.util.Properties;   

public class GMailSender extends javax.mail.Authenticator {   
    private String mailhost = "smtp.gmail.com";   
    private String user;   
    private String password;   
    private Session session;   

    static {   
        Security.addProvider(new com.provider.JSSEProvider());   
    }  

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

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

        session = Session.getDefaultInstance(props, this);   
    }   

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

    public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception {   
        try{
        MimeMessage message = new MimeMessage(session);   
        DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain"));   
        message.setSender(new InternetAddress(sender));   
        message.setSubject(subject);   
        message.setDataHandler(handler);   
        if (recipients.indexOf(',') > 0)   
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));   
        else  
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));   
        Transport.send(message);   
        }catch(Exception e){

        }
    }   

    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");   
        }   
    }   
}

Mail.java（部分）：

new AsyncTask<Void, Void, Void>() {
                @Override public Void doInBackground(Void... arg) {
                    try {
                        GMailSender sender = new GMailSender(strUserEmail, strUserPassword);
                        sender.sendMail(strSubject, messageFinal, strUserEmail, emailAddress);
                    }catch (Exception e) {
                        Log.e("SendMail", e.getMessage(), e);
                    }
                    return null;

                }

            }.execute();

JSSEProvider.java：

package com.provider;


/**
 * @author Alexander Y. Kleymenov
 * @version $Revision$
 */


import java.security.AccessController;
import java.security.Provider;

public final 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;
            }
        });
    }
}

Answer 1

您使用哪个版本的 JavaMail API？看起来他们确实支持oauth2，因此支持gmail。

From JavaMail Api Page

Properties props = new Properties();
 props.put("mail.imap.ssl.enable", "true"); // required for Gmail
 props.put("mail.imap.sasl.enable", "true");
 props.put("mail.imap.sasl.mechanisms", "XOAUTH2");
 props.put("mail.imap.auth.login.disable", "true");
 props.put("mail.imap.auth.plain.disable", "true");
 Session session = Session.getInstance(props);
 Store store = session.getStore("imap");
 store.connect("imap.gmail.com", username, oauth2_access_token);

更新：

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