2020 May 23.
SendMailTask.java
package YOUR.PACKAGE.PROJECT; /* * 2020 May 23. * Ryuichi Hashimoto. */ import android.os.AsyncTask; import java.io.UnsupportedEncodingException; import java.util.Properties; import javax.activation.DataHandler; 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 javax.mail.internet.MimeUtility; import javax.mail.util.ByteArrayDataSource; public class SendMailTask extends AsyncTask<Void, Void, Integer> { private String senderAddress; private String mailPassword; private String mailRecipients; private String mailSubject; private String mailBodyText; private String attachFileName; private byte[] attachByteArray; private Listener listener; /* * constructor senderAddress; 送信元アドレス mailPassword; gmailパスワード mailSubject; メールタイトル mailRecipients; メール受信者アドレス(複数はカンマ区切り) mailBodyText; メール本文 attachByteArray; 添付ファイルのバイト配列 attachFileName; 添付ファイル名 */ SendMailTask(String senderAddress, String mailPassword, String mailRecipients, String mailSubject, String mailBodyText, byte[] attachByteArray, String attachFileName) { // format of Sting-variable-mailRecipients: aaa,bbb,ccc,... this.senderAddress = senderAddress; this.mailPassword = mailPassword; this.mailSubject = mailSubject; this.mailRecipients = mailRecipients; this.mailBodyText = mailBodyText; this.attachByteArray = attachByteArray; this.attachFileName = attachFileName; } protected Integer doInBackground(Void... params) { return sendMail(senderAddress, mailPassword, mailRecipients, mailSubject, mailBodyText, attachByteArray, attachFileName); } @Override protected void onPostExecute(Integer resultNum) { if (listener != null) { listener.onSuccess(resultNum); } } /* * send mail with javaMail * return * 0: succeeded * 1: failed to get instance of InternetAddress[] * 2: failed to MimeBodyPart#setFileName() * 3: MessagingException - failed to send mail */ private int sendMail(final String senderAddress, final String mailPassword, String mailRecipients, final String mailSubject, final String mailBodyText, final byte[] attachByteArray, final String attachFileName) { // format of String-variable-mailRecipients: aaa,bbb,ccc,... /* * set e-mail-recipients to InternetAddress[] */ // convert mailRecipients-string to toAddresses-string-array mailRecipients = mailRecipients.replace(",", " "); mailRecipients = mailRecipients.trim(); mailRecipients = mailRecipients.replaceAll(" +", " "); String[] toAddresses = mailRecipients.split(" "); InternetAddress[] inetToAddress = new InternetAddress[toAddresses.length]; try { for (int i = 0; i < toAddresses.length; i++) { inetToAddress[i] = new InternetAddress(toAddresses[i]); } } catch ( AddressException e) { return 1; } // sending mail with javaMail try { // set property of javaMail for gmail final Properties property = new Properties(); property.put("mail.smtp.host", "smtp.gmail.com"); property.put("mail.host", "smtp.gmail.com"); property.put("mail.smtp.port", "465"); property.put("mail.smtp.socketFactory.port", "465"); property.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); // 認証してセッションを取得 final Session session = Session.getInstance(property, new javax.mail.Authenticator() { @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(senderAddress, mailPassword); } }); // set mail-subject, mail-sender, mail-recipients to MimeMessage MimeMessage mimeMsg = new MimeMessage(session); mimeMsg.setSubject(mailSubject, "utf-8"); mimeMsg.setFrom(new InternetAddress(senderAddress)); for(int i = 0; i < inetToAddress.length; i++){ mimeMsg.addRecipient(javax.mail.Message.RecipientType.TO, inetToAddress[i]); } /* * メール本文と添付ファイルをセット */ // メール本文・添付ファイルを構成する final MimeBodyPart txtPart = new MimeBodyPart(); txtPart.setText(mailBodyText, "utf-8"); final MimeBodyPart filePart = new MimeBodyPart(); filePart.setDataHandler(new DataHandler( new ByteArrayDataSource(attachByteArray, "image/jpeg"))); try { filePart.setFileName(MimeUtility.encodeWord(attachFileName)); } catch (UnsupportedEncodingException e) { return 2; } final Multipart mp = new MimeMultipart(); mp.addBodyPart(txtPart); mp.addBodyPart(filePart); //添付ファイルする場合 mimeMsg.setContent(mp); // メール送信する。 final Transport transport = session.getTransport("smtp"); transport.connect(senderAddress,mailPassword); transport.sendMessage(mimeMsg, mimeMsg.getAllRecipients()); transport.close(); return 0; } catch (MessagingException e) { return 3; } } void setListener(Listener listener) { this.listener = listener; } interface Listener { void onSuccess(int resultNum); } }
MainJavaMail.java
protected void sendMail() { String mailSender = "SENDER@gmail.com"; String mailPassword = "GMAILPASSWORD"; String mailRecipients = "RECIPIENT1@SOME.COM,RECIPIENT2@HOO.COM,RECIPIENT3@BAR.COM"); String mailSubject = "Mail-Title"; String mailBodyText = "1st line of mail-body" + "\n" + "2nd line of mail-body"; String attachedFileName = "fileName"; byte[] byteArrayOfFile; /* ここに添付するファイルのbyte[]型byteArrayOfFileを取得するコードを記述する */ SendMailTask sendMailTask = new SendMailTask( mailSender, mailPassword, mailRecipients, mailSubject, mailBodyText, byteArraySmallImage, attachedFileName); // format of mailRecipients: aaa,bbb,ccc,... sendMailTask.setListener(createSendMailListener()); sendMailTask.execute(); } /* * SendMailTask.Listenerインターフェースの実装 */ private SendMailTask.Listener createSendMailListener() { return new SendMailTask.Listener() { /* * SendMailTask終了後に実行するコード */ @Override public void onSuccess(int resultNum) { Toast toast; switch (resultNum) { case 0: toast = Toast.makeText( thisActivity , "Sent Email", Toast.LENGTH_SHORT); toast.show(); break; case 1: toast = Toast.makeText(thisActivity, "failed to get instance of InternetAddress[]", Toast.LENGTH_LONG); toast.show(); break; case 2: toast = Toast.makeText(thisActivity, "failed to MimeBodyPart#setFileName()", Toast.LENGTH_LONG); toast.show(); break; case 3: toast = Toast.makeText(thisActivity, "MessagingException - failed to send mail", Toast.LENGTH_LONG); toast.show(); break; default: toast = Toast.makeText(thisActivity, "Some error", Toast.LENGTH_LONG); toast.show(); } } }; }
