当前位置: 首页 > 面试题库 >

在Android中自动在后台发送邮件

钱瑞
2023-03-14
问题内容

当我在日志中按“发送”按钮时,显示“邮件已发送,但实际上邮件未发送”。请帮我下面的代码。为什么邮件没有发送?

GMailSender.java

package com.example.sendmail;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

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;

    private Multipart _multipart = new MimeMultipart();
    static {
        Security.addProvider(new com.example.sendmail.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);
            BodyPart messageBodyPart = new MimeBodyPart();
            messageBodyPart.setText(body);
            _multipart.addBodyPart(messageBodyPart);

            // Put parts in message
            message.setContent(_multipart);
            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 void addAttachment(String filename) throws Exception {
        BodyPart messageBodyPart = new MimeBodyPart();
        DataSource source = new FileDataSource(filename);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName("download image");

        _multipart.addBodyPart(messageBodyPart);
    }

    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");
        }
    }
}

JSSEProvider.java

package com.example.sendmail;

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;
                    }
                });
    }
}

MainActivity.java

package com.example.sendmail;

import android.os.Bundle;
import android.os.Environment;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

 public class MainActivity extends Activity {
    Button send;
//String filename = "/sdcard/mysdfile";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        send = (Button) findViewById(R.id.send);
        send.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                // TODO Auto-generated method stub
                new Thread(new Runnable() {
                    @SuppressLint("SdCardPath") public void run() {
                        try {
                            GMailSender sender = new GMailSender("sendermail@gmail.com","**password***");
                            ///Toast.makeText(getApplicationContext(), "Connect", Toast.LENGTH_LONG).show();
                            //sender.addAttachment(filename);
                            sender.addAttachment(Environment.getExternalStorageDirectory().getPath()+"/sdcard/mysdfile.txt");
                            sender.sendMail("Test mail", "This mail has been sent from android app along with attachment","sendermail@gmail.com",
                                    "recievermail@yahoo.com");

                            Log.i("Mail", "Sent");
                            //Toast.makeText(getApplicationContext(),"Your mail has been sent",Toast.LENGTH_LONG).show();


                        } catch (Exception e) {
                            runOnUiThread(new Runnable() 
                            {
                                public void run() 
                                {
                                    Toast.makeText(getApplicationContext(), "Error", Toast.LENGTH_SHORT).show();    
                                }
                            });

                            Log.i("Mail", "Failed"+e);
                            //Toast.makeText(getApplicationContext(),"Error",Toast.LENGTH_LONG).show();

                        }
                    }
                }).start();

                send.setText("Ok");
            }
        });

    }

}

没有错误出现,并且不在发件人邮件中发送邮件,在收件人邮件收件箱中也没有邮件。


问题答案:

MainActivity.java

点击按钮:

String fromEmail = "sample@gmail.com";
                            String fromPassword = "xxxxxx";
                            String toEmails = to_sample@gmail.com;
                            String adminEmail = "admin@gmail.com";
                            String emailSubject = "App Registration Mail";
                            String adminSubject = "App Registration Mail";
                            String emailBody = "Your message";
                            String adminBody = "Your message";
                            new SendMailTask(YOurActivity.this).execute(fromEmail,
                                    fromPassword, toEmails, emailSubject, emailBody);

GMail.java

import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.Properties;

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

import android.app.AlertDialog.Builder;
import android.util.Log;

public class GMail {

    final String emailPort = "587";// gmail's smtp port
    final String smtpAuth = "true";
    final String starttls = "true";
    final String emailHost = "smtp.gmail.com";

    String fromEmail;
    String fromPassword;
    @SuppressWarnings("rawtypes")
    String toEmailList;
    String emailSubject;
    String emailBody;

    Properties emailProperties;
    Session mailSession;
    MimeMessage emailMessage;

    public GMail() {

    }

    @SuppressWarnings("rawtypes")
    public GMail(String fromEmail, String fromPassword,
            String toEmailList, String emailSubject, String emailBody) {
        this.fromEmail = fromEmail;
        this.fromPassword = fromPassword;
        this.toEmailList = toEmailList;
        this.emailSubject = emailSubject;
        this.emailBody = emailBody;

        emailProperties = System.getProperties();
        emailProperties.put("mail.smtp.port", emailPort);
        emailProperties.put("mail.smtp.auth", smtpAuth);
        emailProperties.put("mail.smtp.starttls.enable", starttls);
        Log.i("GMail", "Mail server properties set.");
    }

    public MimeMessage createEmailMessage() throws AddressException,
            MessagingException, UnsupportedEncodingException {

        mailSession = Session.getDefaultInstance(emailProperties, null);
        emailMessage = new MimeMessage(mailSession);

        emailMessage.setFrom(new InternetAddress(fromEmail, fromEmail));

            Log.i("GMail","toEmail: "+toEmailList);
            emailMessage.addRecipient(Message.RecipientType.TO,
                    new InternetAddress(toEmailList));


        emailMessage.setSubject(emailSubject);
        emailMessage.setContent(emailBody, "text/html");// for a html email
        // emailMessage.setText(emailBody);// for a text email
        Log.i("GMail", "Email Message created.");
        return emailMessage;
    }

    public void sendEmail() throws AddressException, MessagingException {

        Transport transport = mailSession.getTransport("smtp");
        transport.connect(emailHost, fromEmail, fromPassword);
        Log.i("GMail","allrecipients: "+emailMessage.getAllRecipients());
        transport.sendMessage(emailMessage, emailMessage.getAllRecipients());
        transport.close();
        Log.i("GMail", "Email sent successfully.");

    }


}

SendMailTask​​.java:

import java.util.List;

import android.app.Activity;
import android.app.ProgressDialog;
import android.app.AlertDialog.Builder;
import android.os.AsyncTask;
import android.util.Log;

@SuppressWarnings("rawtypes")
public class SendMailTask extends AsyncTask {

    private ProgressDialog statusDialog;
    private Activity sendMailActivity;

    public SendMailTask(Activity activity) {
        sendMailActivity = activity;

    }

    protected void onPreExecute() {
        statusDialog = new ProgressDialog(sendMailActivity);
        statusDialog.setMessage("Getting ready...");
        statusDialog.setIndeterminate(false);
        statusDialog.setCancelable(false);
        statusDialog.show();
    }

    @SuppressWarnings("unchecked")
    @Override
    protected Object doInBackground(Object... args) {
        try {
            Log.i("SendMailTask", "About to instantiate GMail...");
            publishProgress("Processing input....");
            GMail androidEmail = new GMail(args[0].toString(),
                    args[1].toString(),  args[2].toString(), args[3].toString(),
                    args[4].toString());
            publishProgress("Preparing mail message....");
            androidEmail.createEmailMessage();
            publishProgress("Sending email....");
            androidEmail.sendEmail();
            publishProgress("Email Sent.");
            Log.i("SendMailTask", "Mail Sent.");

            Config.mailSuccess="1";


        } catch (Exception e) {
            publishProgress(e.getMessage());
            Log.e("SendMailTask", e.getMessage(), e);
        }
        return null;
    }

    @Override
    public void onProgressUpdate(Object... values) {
        statusDialog.setMessage(values[0].toString());

    }

    @Override
    public void onPostExecute(Object result) {
        statusDialog.dismiss();
    }


}

库文件



 类似资料:
  • 我是android初学者!!我正试图发送一封电子邮件。我正在接受用户的姓名、电子邮件和反馈;我想向发送电子邮件emample@xyz.com带有姓名电子邮件和反馈。 我不想使用INTENT\u SEND或INTENT emailIntent=new INTENT(android.content.INTENT.ACTION\u SEND); 我想在后台发送而不打开电子邮件意图。 我试过这个但是

  • 我正在用我的电子邮件Id发送我的邮件数据。我制作了一个包含editText(用于emailId)和按钮的mainActivity类。另一个类是BroadcastReceiver类,我在其中检索数据。现在我不明白如何将这些数据发送到后台提供的电子邮件中。我在谷歌上搜索了很多,但都没有得到所需的回复。请分享这些想法并帮助我。

  • 问题内容: 我试图直接在单击按钮时打开Gmail的电子邮件发送表单,但这总是显示用于发送电子邮件的选项列表。 我这样做是为了打开GMail表单: 但这不是打开GMail表单。我应该怎么做才能打开GMail表单,请帮忙。 有什么办法吗? 问题答案: 在线路上使用一些东西

  • 本文向大家介绍PHP实现163邮箱自动发送邮件,包括了PHP实现163邮箱自动发送邮件的使用技巧和注意事项,需要的朋友参考一下 163邮箱大家都使用过吧,那么基于php如何实现163邮箱自动发送邮件功能呢,下面呐喊教程小编给大家分享具体实现代码: 想给大家展示下效果图: demo.html sendmail.php email.class.php 有关PHP实现163邮箱自动发送邮件功能小编就到此

  • 如何以一种高效可靠的方式来告知应聘者他的申请你已收到?或将订单信息发送给你的客户作为备份?或通知与会者此次报名的活动时间、地点?在金数据,这些都不用你动手。下面以短信为例介绍自动的短信/邮件推送系统的使用方法。 添加手机字段 在金数据中,发送短信/邮件的前提,是要以「手机」字段收集用户的手机号码,系统是以此字段来识别发送对象的,使用「单行文字」无法发送短信。 创建短信模板 进入表单「设置」 ——

  • 是否可以在不打开应用程序的情况下发送whatsApp消息,在后台发送,就像使用以下方式发送短信: 如果是,怎么做?我尝试的代码打开了应用程序(意图): 或者是否可以打开应用程序,发送消息到给定的地址,然后关闭它? 谢谢!