Android 中的 javax.mail.AuthenticationFailedException

Question

尝试使用 JavaMail API 从我的 Gmail 帐户发送电子邮件时，我在 LogCat 中收到以下错误消息。

11-09 11:04:14.385: W/System.err(18443): javax.mail.AuthenticationFailedException
11-09 11:04:14.385: W/System.err(18443):    at javax.mail.Service.connect(Service.java:319)
11-09 11:04:14.385: W/System.err(18443):    at javax.mail.Service.connect(Service.java:169)
11-09 11:04:14.385: W/System.err(18443):    at javax.mail.Service.connect(Service.java:118)
11-09 11:04:14.385: W/System.err(18443):    at com.srindroid.sendemail.MainActivity$RetrievedFeedTask.doInBackground(MainActivity.java:88)
11-09 11:04:14.385: W/System.err(18443):    at com.srindroid.sendemail.MainActivity$RetrievedFeedTask.doInBackground(MainActivity.java:1)
11-09 11:04:14.385: W/System.err(18443):    at android.os.AsyncTask$2.call(AsyncTask.java:288)
11-09 11:04:14.385: W/System.err(18443):    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
11-09 11:04:14.385: W/System.err(18443):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
11-09 11:04:14.385: W/System.err(18443):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
11-09 11:04:14.385: W/System.err(18443):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
11-09 11:04:14.385: W/System.err(18443):    at java.lang.Thread.run(Thread.java:841)

源代码

package com.srindroid.sendemail;

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener{

    Session session = null;
    ProgressDialog pdialog = null;
    Context context = null;
    EditText rec, subject, message;
    String strRec, strSubject, strMessage;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        context = this;

        Button submit = (Button) findViewById (R.id.btnSendEmail);
        rec = (EditText) findViewById (R.id.txtToEmail);
        subject = (EditText) findViewById (R.id.txtSubject);
        message = (EditText) findViewById (R.id.txtMessage);

        submit.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        strRec = rec.getText().toString();
        strSubject = subject.getText().toString();
        strMessage = subject.getText().toString();

        Properties props = new Properties();
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.auth", "false");
        props.put("mail.smtp.port", "465");

        session = Session.getDefaultInstance(props, new Authenticator(){
            protected PasswordAuthentication getPasswordAuthentication(){
                return new PasswordAuthentication("indianclassics27@gmail.com",**<MyPassword>**);               
            }
        });

        pdialog = ProgressDialog.show(context, "Send Email", "Sending Email...");
        RetrievedFeedTask task = new RetrievedFeedTask();
        task.execute();

    }

    class RetrievedFeedTask extends AsyncTask<String, Void, String>{

        @Override
        protected String doInBackground(String... params) {
            try{

                Message message = new MimeMessage(session);
                message.setFrom(new InternetAddress("indianclassics27@gmail.com"));
                message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(strRec));
                message.setSubject(strSubject);
                message.setContent(strMessage, "text/html; charset=utf-8");

                Transport transport = session.getTransport("smtp");
                transport.connect();
                transport.sendMessage(message, message.getAllRecipients());


            }catch(Exception e){
                e.printStackTrace();
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            pdialog.dismiss();
            rec.setText("");
            subject.setText("");
            message.setText("");
            Toast.makeText(getApplicationContext(), "Email Sent", Toast.LENGTH_LONG).show();
            super.onPostExecute(result);
        }



    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


}

能否请您帮助我了解造成此 AuthenticationFailedException 的原因？请注意，当我在 www.gmail.com 中使用相同的凭据时，我能够成功登录到我的电子邮件帐户。

谢谢， 斯里尼

Answer 1

首先，修复这些common mistakes。

打开Session debugging 以查看协议跟踪是否提供有关问题所在的更多线索。

您可能需要enable access for less secure apps。

Answer 2

转到您的邮件，然后单击我的帐户，然后选择登录和安全选项

然后在底部显示允许安全性较低的应用程序：OFF 已关闭，因此打开此选项，现在您可以发送后台邮件。

谢谢