I have tried to create a android application that sends a serialzed object from the phone to a servlet the contents of the object is the input from the user which i will sto
Don't use serialization between architectures. Use JSON, XML, or something else that is architecture-neutral.
I second the suggestion of XStream. It is a very nice and easy API. I don't like the Serialization formats XML or JSON though because they are text based. For a more compact serialization format, try ProtoBuf from Google.
As suggested, use XML or JSON. You can get XStream patched for Android from this blog in order to serialize your objects to XML.