Automatically Mail send in Background in Android

Question

When I press on Send Button in log show Mail Sent But Actually mail not sent. Please help me my code below. Why Mail not sent?

GMailSender.java

Answer 1

MainActivity.java

Put on button click::

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();
    }


}

Library files

Answer 2

mail send from background...

you can use javaMail to send mail from background
first of all you need to add these three .jar file...
Download these jar files

(1) Activation.jar: http://www.java2s.com/Code/Jar/a/Downloadactivationjar.htm
(2) Additionnal.jar: http://code.google.com/p/javamail-android/downloads/detail?name=additionnal.jar&can=2&q=
(3) mail.jar: http://www.java2s.com/Code/Jar/m/Downloadmailjar.htm

And then use these below code:
MainActivity.java

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.SendFailedException;
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.os.AsyncTask;
import android.os.Bundle;
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{

    EditText email_to,subjectEdit,messageEdit;
    Button mailButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        initialize();

        mailButton.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                sendMail();
            }
        });

    }
     private void initialize() {
        email_to=(EditText)findViewById(R.id.editText_to);
        subjectEdit=(EditText)findViewById(R.id.editText_Subject);
        messageEdit=(EditText)findViewById(R.id.editText_Message);

        mailButton=(Button)findViewById(R.id.btn_SendMail);

    }
    protected void sendMail() {
            final String username = "Your Gmail Id ";
            final String password = "Your Gmail 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(username));
                message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse(email_to.getText().toString()));
                message.setSubject("Sent from MobileApp" + subjectEdit.getText().toString());
                message.setText("Message : ,"
                    + "\n\n"+ messageEdit.getText().toString());

                new SendMailTask().execute(message);

              }catch (MessagingException mex) {
                 mex.printStackTrace();
              }


}

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

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



        @Override
        protected String doInBackground(Message... messages) {
            try {
                Transport.send(messages[0]);
                return "Success";
            } 
            catch(SendFailedException ee)
            {
                if(progressDialog.isShowing())
                    progressDialog.dismiss();
                return "error1";
            }catch (MessagingException e) {
                if(progressDialog.isShowing())
                    progressDialog.dismiss();
                return "error2";
            }

        }


        @Override
        protected void onPostExecute(String result) {
            if(result.equals("Success"))
            {

                super.onPostExecute(result);
                progressDialog.dismiss();
                Toast.makeText(MainActivity.this, "Mail Sent Successfully", Toast.LENGTH_LONG).show();

            subjectEdit.setText("");
            messageEdit.setText("");
            }
            else
            if(result.equals("error1"))
                Toast.makeText(MainActivity.this, "Email Failure", Toast.LENGTH_LONG).show();
            else
                if(result.equals("error2"))
                    Toast.makeText(MainActivity.this, "Email Sent problem2", Toast.LENGTH_LONG).show();

        }
    }
}

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.ar.MainActivity" >

    <EditText
        android:id="@+id/editText_to"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="To " >

        <requestFocus
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </EditText>
    <EditText
        android:id="@+id/editText_Subject"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Subject" >


    </EditText>

    <EditText
        android:id="@+id/editText_Message"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Message" />

    <Button
        android:id="@+id/btn_SendMail"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Send Mail" />

</LinearLayout>

AndroidManifest.xml
Add this permission only...

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

Answer 3

You need to import lib BackgroundMailLibrary

 BackgroundMail bm = new BackgroundMail(PasswordChangeActivity.this);
                                            bm.setGmailUserName(mail id);
                                            bm.setGmailPassword(Utils.decryptIt(password)); 
                                            bm.setMailTo(ownerEmail);
                                            bm.setFormSubject(subject);
                                            bm.setFormBody(body);
                                            bm.send();

Answer 4

Add your manifest file:::

<uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
     <uses-permission android:name="com.android.email.permission.READ_ATTACHMENT"/>