Following are the steps to include Facebook SDK into android project:
1) Download the Facebook SDK from the https://github.com/facebook/facebook-android-sdk/ and extract it to local drive.
2) Import "facebook" as a android project into your Eclipse, this is your Facebook SDK, and You have to reference it to your android project.
3) Now create your android project.
4) Right click on it, go to Properties-->android and Add the "facebook "Library as a reference to your project. click Apply.
Check the video link: http://www.youtube.com/watch?v=w-vNi1W4fco