Siqi Yan
sy2349@columbia.edu

Note that in order for this code to be deployable you have to add
dependency first. Follow the instruction here:
http://github.com/facebook/facebook-android-sdk, by first download the
source code by clicking the "Download source" button at the upper right
corner, then follow the steps at "Install necessary packages" section,
then the "Create your own application", then you are good to go.