How to send a simple email programmatically? (exists a simple way to do it?)

Question

I have a textfield on my app, and a button. I only want that when user press the button, my app have to send a email with the text "Hello" to the direction on the textfield.

Is there a easy way to do it?

Answer 1

First way. If you don't want to be linked to the native email program or gmail program (via intent) to send the mail, but have the email sent in the background, see the code below.

You can use this helper class and adjust it to your needs.

package com.myapp.android.model.service;  import android.util.Log; import com.myapp.android.MyApp;  import java.util.ArrayList; import java.util.Calendar; import java.util.Properties;  import javax.activation.DataHandler; import javax.mail.Authenticator; 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.internet.AddressException; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMultipart;  public class MailService {     // public static final String MAIL_SERVER = "localhost";      private String toList;     private String ccList;     private String bccList;     private String subject;     final private static String SMTP_SERVER = DataService             .getSetting(DataService.SETTING_SMTP_SERVER);     private String from;     private String txtBody;     private String htmlBody;     private String replyToList;     private ArrayList<Attachment> attachments;     private boolean authenticationRequired = false;      public MailService(String from, String toList, String subject, String txtBody, String htmlBody,             Attachment attachment) {         this.txtBody = txtBody;         this.htmlBody = htmlBody;         this.subject = subject;         this.from = from;         this.toList = toList;         this.ccList = null;         this.bccList = null;         this.replyToList = null;         this.authenticationRequired = true;          this.attachments = new ArrayList<Attachment>();         if (attachment != null) {             this.attachments.add(attachment);         }     }      public MailService(String from, String toList, String subject, String txtBody, String htmlBody,             ArrayList<Attachment> attachments) {         this.txtBody = txtBody;         this.htmlBody = htmlBody;         this.subject = subject;         this.from = from;         this.toList = toList;         this.ccList = null;         this.bccList = null;         this.replyToList = null;         this.authenticationRequired = true;         this.attachments = attachments == null ? new ArrayList<Attachment>()                 : attachments;     }      public void sendAuthenticated() throws AddressException, MessagingException {         authenticationRequired = true;         send();     }      /**      * Send an e-mail      *       * @throws MessagingException      * @throws AddressException      */     public void send() throws AddressException, MessagingException {         Properties props = new Properties();          // set the host smtp address         props.put("mail.smtp.host", SMTP_SERVER);         props.put("mail.user", from);          props.put("mail.smtp.starttls.enable", "true");  // needed for gmail         props.put("mail.smtp.auth", "true"); // needed for gmail         props.put("mail.smtp.port", "587");  // gmail smtp port          /*Authenticator auth = new Authenticator() {             @Override             protected PasswordAuthentication getPasswordAuthentication() {                 return new PasswordAuthentication("[email protected]", "mypassword");             }         };*/           Session session;          if (authenticationRequired) {             Authenticator auth = new SMTPAuthenticator();             props.put("mail.smtp.auth", "true");             session = Session.getDefaultInstance(props, auth);         } else {             session = Session.getDefaultInstance(props, null);                   }          // get the default session         session.setDebug(true);          // create message         Message msg = new javax.mail.internet.MimeMessage(session);          // set from and to address         try {             msg.setFrom(new InternetAddress(from, from));             msg.setReplyTo(new InternetAddress[]{new InternetAddress(from,from)});         } catch (Exception e) {             msg.setFrom(new InternetAddress(from));             msg.setReplyTo(new InternetAddress[]{new InternetAddress(from)});         }          // set send date         msg.setSentDate(Calendar.getInstance().getTime());          // parse the recipients TO address         java.util.StringTokenizer st = new java.util.StringTokenizer(toList, ",");         int numberOfRecipients = st.countTokens();          javax.mail.internet.InternetAddress[] addressTo = new javax.mail.internet.InternetAddress[numberOfRecipients];          int i = 0;         while (st.hasMoreTokens()) {             addressTo[i++] = new javax.mail.internet.InternetAddress(st                     .nextToken());         }         msg.setRecipients(javax.mail.Message.RecipientType.TO, addressTo);          // parse the replyTo addresses         if (replyToList != null && !"".equals(replyToList)) {             st = new java.util.StringTokenizer(replyToList, ",");             int numberOfReplyTos = st.countTokens();             javax.mail.internet.InternetAddress[] addressReplyTo = new javax.mail.internet.InternetAddress[numberOfReplyTos];             i = 0;             while (st.hasMoreTokens()) {                 addressReplyTo[i++] = new javax.mail.internet.InternetAddress(                         st.nextToken());             }             msg.setReplyTo(addressReplyTo);         }          // parse the recipients CC address         if (ccList != null && !"".equals(ccList)) {             st = new java.util.StringTokenizer(ccList, ",");             int numberOfCCRecipients = st.countTokens();              javax.mail.internet.InternetAddress[] addressCC = new javax.mail.internet.InternetAddress[numberOfCCRecipients];              i = 0;             while (st.hasMoreTokens()) {                 addressCC[i++] = new javax.mail.internet.InternetAddress(st                         .nextToken());             }              msg.setRecipients(javax.mail.Message.RecipientType.CC, addressCC);         }          // parse the recipients BCC address         if (bccList != null && !"".equals(bccList)) {             st = new java.util.StringTokenizer(bccList, ",");             int numberOfBCCRecipients = st.countTokens();              javax.mail.internet.InternetAddress[] addressBCC = new javax.mail.internet.InternetAddress[numberOfBCCRecipients];              i = 0;             while (st.hasMoreTokens()) {                 addressBCC[i++] = new javax.mail.internet.InternetAddress(st                         .nextToken());             }              msg.setRecipients(javax.mail.Message.RecipientType.BCC, addressBCC);         }          // set header         msg.addHeader("X-Mailer", "MyAppMailer");         msg.addHeader("Precedence", "bulk");         // setting the subject and content type         msg.setSubject(subject);          Multipart mp = new MimeMultipart("related");          // set body message         MimeBodyPart bodyMsg = new MimeBodyPart();         bodyMsg.setText(txtBody, "iso-8859-1");         if (attachments.size()>0) htmlBody = htmlBody.replaceAll("#filename#",attachments.get(0).getFilename());         if (htmlBody.indexOf("#header#")>=0) htmlBody = htmlBody.replaceAll("#header#",attachments.get(1).getFilename());         if (htmlBody.indexOf("#footer#")>=0) htmlBody = htmlBody.replaceAll("#footer#",attachments.get(2).getFilename());          bodyMsg.setContent(htmlBody, "text/html");         mp.addBodyPart(bodyMsg);          // set attachements if any         if (attachments != null && attachments.size() > 0) {             for (i = 0; i < attachments.size(); i++) {                 Attachment a = attachments.get(i);                 BodyPart att = new MimeBodyPart();                 att.setDataHandler(new DataHandler(a.getDataSource()));                 att.setFileName( a.getFilename() );                 att.setHeader("Content-ID", "<" + a.getFilename() + ">");                 mp.addBodyPart(att);             }         }         msg.setContent(mp);          // send it         try {             javax.mail.Transport.send(msg);         } catch (Exception e) {             e.printStackTrace();         }      }      /**      * SimpleAuthenticator is used to do simple authentication when the SMTP      * server requires it.      */     private static class SMTPAuthenticator extends javax.mail.Authenticator {          @Override         protected PasswordAuthentication getPasswordAuthentication() {              String username = DataService                     .getSetting(DataService.SETTING_SMTP_USER);             String password = DataService                     .getSetting(DataService.SETTING_SMTP_PASSWORD);              return new PasswordAuthentication(username, password);         }     }      public String getToList() {         return toList;     }      public void setToList(String toList) {         this.toList = toList;     }      public String getCcList() {         return ccList;     }      public void setCcList(String ccList) {         this.ccList = ccList;     }      public String getBccList() {         return bccList;     }      public void setBccList(String bccList) {         this.bccList = bccList;     }      public String getSubject() {         return subject;     }      public void setSubject(String subject) {         this.subject = subject;     }      public void setFrom(String from) {         this.from = from;     }      public void setTxtBody(String body) {         this.txtBody = body;     }      public void setHtmlBody(String body) {         this.htmlBody = body;     }      public String getReplyToList() {         return replyToList;     }      public void setReplyToList(String replyToList) {         this.replyToList = replyToList;     }      public boolean isAuthenticationRequired() {         return authenticationRequired;     }      public void setAuthenticationRequired(boolean authenticationRequired) {         this.authenticationRequired = authenticationRequired;     }  } 

And use this class:

MailService mailer = new MailService("[email protected]","[email protected]","Subject","TextBody", "<b>HtmlBody</b>", (Attachment) null); try {     mailer.sendAuthenticated(); } catch (Exception e) {     Log.e(AskTingTing.APP, "Failed sending email.", e); } 

Second way. Another option, if you don't mind using the native email client or gmail on Android for sending the mail (but the user actually has to hit the send button finally in the email client), you can do this:

startActivity(new Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:[email protected]"))); 

Answer 2

Add This line of code in your submit button

 final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);                               emailIntent.setType("text/plain");                               emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String\[\]{  "[email protected]"});                               emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Hello There");                               emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "Add Message here");                                   emailIntent.setType("message/rfc822");                              try {                                 startActivity(Intent.createChooser(emailIntent,                                         "Send email using..."));                             } catch (android.content.ActivityNotFoundException ex) {                                 Toast.makeText(getActivity(),                                         "No email clients installed.",                                         Toast.LENGTH_SHORT).show();                             }                          }                     }); 

Android will automatically choose clients avilable in your device and user will be free to choose any Email client he want

Suppose user choose gmail as mailing client it would look like this:-

Plus point for this method is you are not adding any extra jar in App & givinguser freedom to choose action.