Send e-mail in Android using the JavaMail API using Gmail authentication.
Steps to create a sample Project:
MailSenderActivity.java:
public class MailSenderActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); final Button send = (Button) this.findViewById(R.id.send); send.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { try { GMailSender sender = new GMailSender("username@gmail.com", "password"); sender.sendMail("This is Subject", "This is Body", "user@gmail.com", "user@yahoo.com"); } catch (Exception e) { Log.e("SendMail", e.getMessage(), e); } } }); }}GMailSender.java:
public class GMailSender extends javax.mail.Authenticator { private String mailhost = "smtp.gmail.com"; private String user; private String password; private Session session; static { Security.addProvider(new com.provider.JSSEProvider()); } public GMailSender(String user, String password) { this.user = user; this.password = password; Properties props = new Properties(); props.setProperty("mail.transport.protocol", "smtp"); props.setProperty("mail.host", mailhost); props.put("mail.smtp.auth", "true"); props.put("mail.smtp.port", "465"); props.put("mail.smtp.socketFactory.port", "465"); props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); props.put("mail.smtp.socketFactory.fallback", "false"); props.setProperty("mail.smtp.quitwait", "false"); session = Session.getDefaultInstance(props, this); } protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(user, password); } public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception { try{ MimeMessage message = new MimeMessage(session); DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/plain")); message.setSender(new InternetAddress(sender)); message.setSubject(subject); message.setDataHandler(handler); if (recipients.indexOf(',') > 0) message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients)); else message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients)); Transport.send(message); }catch(Exception e){ } } public class ByteArrayDataSource implements DataSource { private byte[] data; private String type; public ByteArrayDataSource(byte[] data, String type) { super(); this.data = data; this.type = type; } public ByteArrayDataSource(byte[] data) { super(); this.data = data; } public void setType(String type) { this.type = type; } public String getContentType() { if (type == null) return "application/octet-stream"; else return type; } public InputStream getInputStream() throws IOException { return new ByteArrayInputStream(data); } public String getName() { return "ByteArrayDataSource"; } public OutputStream getOutputStream() throws IOException { throw new IOException("Not Supported"); } } } JSSEProvider.java:
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *//** * @author Alexander Y. Kleymenov * @version $Revision$ */import java.security.AccessController;import java.security.Provider;public final class JSSEProvider extends Provider { public JSSEProvider() { super("HarmonyJSSE", 1.0, "Harmony JSSE Provider"); AccessController.doPrivileged(new java.security.PrivilegedAction<Void>() { public Void run() { put("SSLContext.TLS","org.apache.harmony.xnet.provider.jsse.SSLContextImpl"); put("Alg.Alias.SSLContext.TLSv1", "TLS"); put("KeyManagerFactory.X509","org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl"); put("TrustManagerFactory.X509","org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl"); return null; } }); }}Add the following three jars to your Android Project.
Check this post if you don't know how.
And don't forget to add the following line in your manifest:
<uses-permission android:name="android.permission.INTERNET" />Adjust your account access settings for less secure apps by visiting this link:
https://www.google.com/settings/security/lesssecureapps.
UPD 2023: Less Secure Apps has been deprecated. To access your account, you will need to enable Two Factor Authentication and use App Password with the settings provided in the image below:
Run the project and check your recipient mail account for the mail.
P.S.: Please keep in mind that performing network operations directly from an Activity in Android is not allowed. Hence, it is highly recommended to use AsyncTask or IntentService to avoid encountering a network on main thread exception.
Jar files: https://code.google.com/archive/p/javamail-android/