Help for integrating echosign into android application

Hello everybody. I have a question regarding integration of adobe echosign into an application of ours. The ideal situation is like, two people are in a conversation and one sends a document to another for a sign. The one who sends the document is using a web based system and the one receiving the document is using an Android application. Now I would like to know what needs to be done in this regard. There is a java sdk available, but so far I have found nothing on how to integrate it in android, or even if it does need an integration and can do away with just opening the received url in a native webview. I know that it is a cloud based service, and works in a little different manner than just plain signing and send/ receive of a document. Any help in the right direction would be greatly appreciated. Thank you.