Cross platform application

Me and my friend are going to work on final year project (graduation). We are going to create an android application as well as web. Now the problem is that we can not work together. He is far from me but we have to access a single database as android and web will get and post data to same data base. Is is possible to create a single data base and both of us access that db? If yes then how??? I am working on android and friend on Web Thank you in advance