android studio mail gönderme kodu çalışırken runtime hatası

Arkadaslar kodlarım aşağıda. mail göndermeye çalışıyorum. çalışırken tam göndereceği sırada durduruldu şeklinde runtime hatası alıyorum.

hatayı tam olarak verdiği yer

mail.setContent(“Metin”,”textplain”);

satırı

bu satıra gelince uygulama patlıyo.

kodum şöyle

public class maildenemejava extends Fragment {

Session session=null;

@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // TODO Auto-generated method stub

View view = inflater.inflate(R.layout.maildenemelayout, container,false);

Button gonder = (Button) view.findViewById(R.id.button9);

gonder.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { buttonClicked(v); } });

return view; }

public void buttonClicked (View view) {

Properties ozellik = new Properties();

ozellik.put("mail.transport.protocol", "smtp");

ozellik.put("mail.smtp.host", "mx1.hostinger.web.tr");

ozellik.put("mail.smtp.auth", "true");

ozellik.put("mail.smtp.port","587");

KullaniciBilgi kullaniciBilgi = new KullaniciBilgi();

Session mailSession = Session.getDefaultInstance(ozellik, kullaniciBilgi);

try{ Transport transport = mailSession.getTransport();

MimeMessage mail = new MimeMessage(mailSession);

mail.setContent("Metin","textplain");

mail.setFrom(new InternetAddress("info@temsili.xyz"));

mail.addRecipient(Message.RecipientType.TO, new InternetAddress("temsili@hotmail.com")); transport.connect();

transport.sendMessage(mail, mail.getRecipients(Message.RecipientType.TO));

transport.close();

Toast.makeText(getActivity(), "gönderili", Toast.LENGTH_LONG).show(); }

catch (Exception e) { e.printStackTrace(); } } }

logcat de bu şekilde

01-13 12:58:19.285 3005-3005/hop.com.meto E/AndroidRuntime: FATAL EXCEPTION: main
Process: hop.com.meto, PID: 3005
java.lang.NoClassDefFoundError: javax.activation.DataHandler
at javax.mail.internet.MimeMessage.setContent(MimeMessage.java:1566)
at hop.com.meto.maildenemejava.buttonClicked(maildenemejava.java:132)
at hop.com.meto.maildenemejava$1.onClick(maildenemejava.java:64)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5001)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
at dalvik.system.NativeStart.main(Native Method)