Question

我从android开始，这是我的第一个程序。

这就是我的代码。我可以使用此代码发送电子邮件（在后台）但无法附加文件作为电子邮件附件。我已经在mainfest.xml中获得了许可

请让我知道我做错了什么以及需要实施什么。

非常感谢任何帮助。

import java.net.Authenticator;
import java.util.Date; 
import java.util.Properties; 
import javax.activation.CommandMap; 
import javax.activation.DataHandler; 
import javax.activation.DataSource; 
import javax.activation.FileDataSource; 
import javax.activation.MailcapCommandMap; 
import javax.mail.BodyPart; 
import javax.mail.Message;
import javax.mail.MessagingException;
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 android.annotation.SuppressLint;


public class GMailSender extends javax.mail.Authenticator { 
  private String _user; 
  private String _pass; 

  private String[] _to; 
  private String _from; 

  private String _port; 
  private String _sport; 

  private String _host; 

  private String _subject; 
  private String _body; 

  private boolean _auth; 

  private boolean _debuggable; 

  private Multipart _multipart; 


  public GMailSender() { 
    _host = "smtp.gmail.com";
    _port = "465";
    _sport = "465";

    _user = "";
    _pass = "";
    _from = "";
    _subject = "";
    _body = "";

    _debuggable = false;
    _auth = true;

    _multipart = new MimeMultipart(); 

     MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap(); 
    mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html"); 
    mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml"); 
    mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain"); 
    mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); 
    mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822"); 
    CommandMap.setDefaultCommandMap(mc); 
  } 

  public GMailSender(String user, String pass) { 
    this(); 

    _user = user; 
    _pass = pass; 
  } 

  public boolean send(String to, String from, String subject, String text) {
        return send(new String[] {to}, from, subject, text);
    }
    public boolean send(String[] to, String from, String subject, String text) {
        Properties props = new Properties();
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.host", _host);
        props.put("mail.smtp.user", _user);
        props.put("mail.smtp.port", _port);
        props.put("mail.smtp.password", _pass);
        props.put("mail.smtp.socketFactory.port", _port);
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");

        Session session = Session.getInstance(props, this);

        try {
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from));
            InternetAddress[] addressTo = new InternetAddress[to.length];
            for (int i = 0; i < to.length; i++) {
                addressTo[i] = new InternetAddress(to[i]);
            }
            message.setRecipients(Message.RecipientType.TO, addressTo);
            message.setSubject(subject);
            message.setText(text);
            Transport.send(message);
        } catch (MessagingException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }


    public void addAttachment(String filename) throws Exception { 
    BodyPart messageBodyPart = new MimeBodyPart(); 
    DataSource source = new FileDataSource(filename); 
    messageBodyPart.setDataHandler(new DataHandler(source)); 
    messageBodyPart.setFileName(filename); 
    _multipart.addBodyPart(messageBodyPart); 
  } 

  @Override 
  public PasswordAuthentication getPasswordAuthentication() { 
    return new PasswordAuthentication(_user, _pass); 
  }

  private Properties _setProperties() { 
    Properties props = new Properties(); 
    props.put("mail.smtp.host", _host); 
    if(_debuggable) { 
      props.put("mail.debug", "true"); 
    } 
    if(_auth) { 
      props.put("mail.smtp.auth", "true"); 
    } 
    props.put("mail.smtp.port", _port); 
    props.put("mail.smtp.socketFactory.port", _sport); 
    props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
    props.put("mail.smtp.socketFactory.fallback", "false"); 
    return props; 
  } 
  // the getters and setters 
  public String getBody() { 
    return _body; 
  } 
  public void setBody(String _body) { 
    this._body = _body; 
  } 
  // more of the getters and setters ….. 
}

我在活动中如何称呼它

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.format.Time;
import android.util.Log;

public class mailActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        new PostTask().execute();

        finish();
     }

    public class PostTask extends AsyncTask<String, Void, String>  {
        @Override
        protected String doInBackground(String... params) {
            Log.d("doInBackground","You are in do in background ... ");

            String filepath = "/storage/sdcard0/Bluetooth/2012.jpg"; 

            Time now = new Time();
            now.setToNow();
            GMailSender sender = new GMailSender("from.xxx@gmail.com","XXX.Password");
            try {
                    sender.addAttachment("/storage/sdcard0/Bluetooth/2012.jpg");
                    sender.send("to.xxx@gmail.com", "from.xxx@gmail.com", "Silent Mail:" + now.format("%d-%m-%Y %H:%M"), "This eMail was sent silently in background");

            catch (Exception e) {                   
                Log.e("doInBackground","Mail Exception...");
                Log.e("doInBackground", "exception: " + e.toString());
                }
            Log.d("doInBackground", "You completed do in background ... ");
            return null;
        }
    }
}

Answer 1

package com.mail.example;

import java.util.Properties;

import javax.activation.CommandMap;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.activation.MailcapCommandMap;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
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;

public class SendFileEmail
{
 public void send(String filepath)
 {

  // Recipient's email ID needs to be mentioned.
  String to = "abc@gmail.com";

  // Sender's email ID needs to be mentioned
  final String from = "xyz@gmail.com";
 // final String username = "xyz";
  final String pass = "xyz123";
  // Assuming you are sending email from localhost
  String host = "smtp.gmail.com";

  // Get system properties
  Properties properties = System.getProperties();

  // Setup mail server
  properties.setProperty("mail.smtp.host", host);
  properties.put("mail.smtp.user", from);
  properties.put("mail.smtp.password", pass);
  properties.put("mail.smtp.port", "587");
  properties.put("mail.smtp.starttls.enable","true");
  properties.put("mail.smtp.auth", "true");

  //Read more: http://mrbool.com/how-to-work-with-java-mail-api-in-android/27800#ixzz3E2T8ZbpJ


  // Get the default Session object.
  //Session session = Session.getDefaultInstance(properties);


  Session session = Session.getInstance(properties, new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(from, pass);
        }
    });


  try{
     // Create a default MimeMessage object.
     MimeMessage message = new MimeMessage(session);

     // Set From: header field of the header.
     message.setFrom(new InternetAddress(from));

     // Set To: header field of the header.
     message.addRecipient(Message.RecipientType.TO,
                              new InternetAddress(to));

     // Set Subject: header field
     message.setSubject("This is the Subject Line!");

     // Create the message part 
     BodyPart messageBodyPart = new MimeBodyPart();

     // Fill the message
     messageBodyPart.setText("This is message body");

     // Create a multipar message
     Multipart multipart = new MimeMultipart();

     // Set text message part
     multipart.addBodyPart(messageBodyPart);

     // Part two is attachment
     messageBodyPart = new MimeBodyPart();
     DataSource source = new FileDataSource(filepath);
     messageBodyPart.setDataHandler(new DataHandler(source));
     messageBodyPart.setFileName(filepath);
     multipart.addBodyPart(messageBodyPart);


     MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap(); 
     mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html"); 
     mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml"); 
     mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain"); 
     mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); 
     mc.addMailcap("message/rfc822;; x-java-content- handler=com.sun.mail.handlers.message_rfc822");

     // Send the complete message parts
     message.setContent(multipart);
     // Send message
     Transport.send(message);
     System.out.println("Sent message successfully....");
  }catch (MessagingException mex) {
     mex.printStackTrace();
  }
}
 }

调用这样的方法

public class SendMail {

/**
 * @param args
 */
public static void main(String[] args) {
    new SendFileEmail().send("sample.xlsx");
}

}

如果文件位于资产文件夹示例test.txt

中

File f = new File(getCacheDir()+"/test.txt");
if (!f.exists()) try {

InputStream is = getAssets().open("test.txt");
int size = is.available();
byte[] buffer = new byte[size];
is.read(buffer);
is.close();


FileOutputStream fos = new FileOutputStream(f);
fos.write(buffer);
fos.close();
 } catch (Exception e) { throw new RuntimeException(e); }

new SendFileEmail().send(f.getPath());

Answer 2

首先，按getting rid of the socket factory stuff that's not needed清理代码。

没有附加的原因是你在多部分中添加了一个身体部位，但是你从不使用多部分。您需要将multipart设置为消息的内容，并且multipart需要包含主文本正文和附件的正文部分。另请参阅MimeBodyPart.attachFile方法。

使用android中的java mail api与附件发送电子邮件

2 个答案: