I don’t know much about android studio, but if you go into eclipse, go to File > Import, then select “import existing android code into workspace”, and choose the source code folder. Be sure to check “Copy project files into workspace”. Then, you need to be sure you have the latest android SDK, ADT plugin, and a working android emulator (in eclipse). Goodluck!
solved How can I open source code for an Android app? [closed]