List of wordpress APIs to get list of Posts and Comments

Hi,

I’m Android Developer and I have decided to build an Android based application for myself. I have a Word press powered website and I want to show my blog contents into my application.

I’m not familiar with API of wordpress and i need to know for example if I want to load posts, which API should be called, or if i want to get comments of X post, I have to call which API? I have checked Free Android project by wordpress but unfortunately I don’t understand it 🙂

Is there any documentation about it?
any suggestion would be appreciated.