Help using agora screen sharing documentation

I am creating an video sharing android app.I am successful in camera video sharing,but i needs screen sharing too.I am using agora api.I am trying to implement the screen share feature using the [login to view URL] some codes seems unclear and i am failure to implement the [login to view URL] i need help in this documentation: [login to view URL] It will not take much time at all if you are experienced. If you think you may be able to help me ,please bid.(Don't worry about failure,i will not give any bad review if you try hard to help me.)