Java.lang.noclassdeffounderror On Android

i am doing an application-email sending without user interaction. so that i got coding from the following link. here i got java.lang.NoClassDefFoundError: com.murali.email.GMailSen

Solution 1:

Make sure the jar sits in a folder named libs, not lib. Then perform "clean" and make sure the jar appears under Android dependencies.

Solution 2:

If we get this error on android

java.lang.NoClassDefFoundError: javax.activation.DataHandler referenced from method javax.mail.internet.MimeMessage.updateHeaders

We need to add aditional.jar along with mail.jar and activation.jar. This solved my issue in android when accessing MimeMultipart.