Sending mail in android without intents using SMTP

Question

Hi I am developing an android app which will send mail on click of a button. Code worked at first but due to some reason its not working now. Could anyone please help me with this? [email protected] is the recipient. [email protected] is the sender. I have hard coded the subject and the body of the mail.

package com.example.clc_construction;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
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.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import android.app.Activity;
import android.app.ProgressDialog;  
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;


public class Email extends Activity
{
public String jobNo;
public String teamNo;
private static final String username = "[email protected]";
private static final String password = "000000";
private static final String emailid = "[email protected]";
private static final String subject = "Photo";
private static final String message = "Hello";
private Multipart multipart = new MimeMultipart();
private MimeBodyPart messageBodyPart = new MimeBodyPart();
public File mediaFile;

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.camera_screen);
    Intent intent = getIntent();
    jobNo = intent.getStringExtra("Job_No");
    teamNo = intent.getStringExtra("Team_No"); 
    sendMail(emailid,subject,message);

}
private void sendMail(String email, String subject, String messageBody)
 {
        Session session = createSessionObject();

        try {
            Message message = createMessage(email, subject, messageBody, session);
            new SendMailTask().execute(message);
        }
        catch (AddressException e)
        {
            e.printStackTrace();
        }
        catch (MessagingException e)
        {
            e.printStackTrace();
        }
        catch (UnsupportedEncodingException e)
        {
            e.printStackTrace();
        }
    }


private Session createSessionObject()
{
    Properties properties = new Properties();
    properties.put("mail.smtp.auth", "true");
    properties.put("mail.smtp.starttls.enable", "true");
    properties.put("mail.smtp.host", "smtp.gmail.com");
    properties.put("mail.smtp.port", "587");

    return Session.getInstance(properties, new javax.mail.Authenticator()
    {
        protected PasswordAuthentication getPasswordAuthentication()
        {
            return new PasswordAuthentication(username, password);
        }
    });
}

private Message createMessage(String email, String subject, String messageBody, Session session) throws 

MessagingException, UnsupportedEncodingException
{
    Message message = new MimeMessage(session);
    message.setFrom(new InternetAddress("[email protected]", "Naveed Qureshi"));
    message.addRecipient(Message.RecipientType.TO, new InternetAddress(email, email));
    message.setSubject(subject);
    message.setText(messageBody);
    return message;
}



public class SendMailTask extends AsyncTask<Message, Void, Void>
{
    private ProgressDialog progressDialog;

    @Override
    protected void onPreExecute()
    {
        super.onPreExecute();
        progressDialog = ProgressDialog.show(Email.this, "Please wait", "Sending mail", true, false);
    }

    @Override
    protected void onPostExecute(Void aVoid)
    {
        super.onPostExecute(aVoid);
        progressDialog.dismiss();
    }

    protected Void doInBackground(javax.mail.Message... messages)
    {
        try
        {
            Transport.send(messages[0]);
        } catch (MessagingException e)
        {
            e.printStackTrace();
        }
        return null;
    }
}
}

Answer 1

Put in your manifest file,

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

check if you have internet connection,

public boolean isOnline() {
    ConnectivityManager cm =
        (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netInfo = cm.getActiveNetworkInfo();
    if (netInfo != null && netInfo.isConnectedOrConnecting()) {
        return true;
    }
    return false;
}

and finnaly use this code to send email

final String username = "[email protected]";
final String password = "password";

Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");

Session session = Session.getInstance(props,
  new javax.mail.Authenticator() {
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }
  });
    try {
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("[email protected]"));
        message.setRecipients(Message.RecipientType.TO,
            InternetAddress.parse("[email protected]"));
        message.setSubject("Testing Subject");
        message.setText("Dear Mail Crawler,"
            + "\n\n No spam to my email, please!");

        MimeBodyPart messageBodyPart = new MimeBodyPart();

        Multipart multipart = new MimeMultipart();

        messageBodyPart = new MimeBodyPart();
        String file = "path of file to be attached";
        String fileName = "attachmentName"
        DataSource source = new FileDataSource(file);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName(fileName);
        multipart.addBodyPart(messageBodyPart);

        message.setContent(multipart);

        Transport.send(message);

        System.out.println("Done");

    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }

Answer 2

config gradle as per below define get reference from Here

repositories { 
     jcenter()
     maven {
         url "https://maven.java.net/content/groups/public/"
     }
}

dependencies {
     compile 'com.sun.mail:android-mail:1.5.5'
     compile 'com.sun.mail:android-activation:1.5.5'
}

android {
   packagingOptions {
       pickFirst 'META-INF/LICENSE.txt' // picks the JavaMail license file
   }
}

Add this async task to send mail

 public class sendemail extends AsyncTask<String, Integer, Integer> {

    ProgressDialog progressDialog;
    private StringBuilder all_email;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        progressDialog = new ProgressDialog(GetuserActivity.this);
        progressDialog.setMessage("Uploading, please wait...");
        progressDialog.show();
        if (selecteduser_arr != null) {
            all_email = new StringBuilder();
            for (int i = 0; i < selecteduser_arr.size(); i++) {
                if (i == 0) {
                    all_email.append(selecteduser_arr.get(i));
                } else {
                    String temp = "," + selecteduser_arr.get(i);
                    all_email.append(temp);
                }
            }
        }
    }

    @Override
    protected Integer doInBackground(String... strings) {

        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", "true");
        props.put("mail.smtp.port", "465");

        Session session = Session.getDefaultInstance(props,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication("enterhereyouremail", "enterherepassword");
                    }
                });

        try {

            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress("enterhereyouremail"));
            message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("[email protected],[email protected]"));
            message.setSubject("Testing Subject");
            message.setText("Dear Mail Crawler," +
                    "\n\n No spam to my email, please!");

            Transport.send(message);

            System.out.println("Done");

        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
        return 1;
    }

    @Override
    protected void onPostExecute(Integer integer) {
        super.onPostExecute(integer);
        progressDialog.dismiss();
    }
}