How to send mail programmatically in android using the OAuth2.0 token

Question

I am developing an application in which I want to send mail programmatically using Gmail credentials, I know how to access the device identifier and token using the AccountManager . Please suggest me send mail using credentials using some code or tutorial. I am new to Android. Please help me in advance.

Answer 1

After very hard work, I can now log in to Google using Oauth 2. Now I shared here because many questions remained unanswered. Below are the steps to sign in to Google.

1 - Select an account on your device using

 public static AccountManager accountManager; accountManager = AccountManager.get(this); Account[] accounts = accountManager.getAccountsByType("com.google"); 

2 - Get the token from the selected account using

 private void onAccountSelected(final Account account) { accountManager.getAuthToken(account, AUTH_TOKEN_TYPE, null, this, new AccountManagerCallback<Bundle>() { public void run(AccountManagerFuture<Bundle> future) { try { String token = future.getResult().getString(AccountManager.KEY_AUTHTOKEN); useToken(account, token); } catch (OperationCanceledException e) { onAccessDenied(); } catch (Exception e) { handleException(e); } } }, null); 

}

3 - . Now authenticate the token using the user account and token. You can log in to Google.

Note. . After the token becomes unauthorized to enter the system, you need to revoke the token.

4 - to re-enter the system, you must revoke the token using

 accountManager.invalidateAuthToken("com.google", token); 

5 - after invalidation you should receive a new token using

  String newToken = AccountManager.get(this).getAuthToken(new Account(account, "com.google"), AUTH_TOKEN_TYPE, true, null, null).getResult().getString(AccountManager.KEY_AUTHTOKEN); 

6 - in your AndroidManifest.xml add below uses permissions

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

That's all you need now enjoy

Answer 2

  fist you download activation.jar,mail.jar,additionnal.jar and add to built to your project And code r following ---------Create GMailSender.class import javax.activation.DataHandler; import javax.activation.DataSource; import javax.mail.Message; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.security.Security; import java.util.Properties; 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 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){ e.printStackTrace(); } } 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"); } } } 2-Create JSSEProvider.class 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; } }); } } 3-use This code in to your Activity button click etc.. try { GMailSender sender = new GMailSender("sender gmail ID", "password"); sender.sendMail("This is Subject", "This is Body", "receiverID", "receiverID"); } catch (Exception e) { Log.e("SendMail", e.getMessage(), e); } 

Source: fooobar.com/questions/13758 / ... (credit for lending)