Extract .zip you download from envato, you will see some file and folder.
For android we named project folder with "/project_android/The City" , you can open/import it at next step.
When your android studio ready you can open it and you will see display like this :
Select "Import Project (Gradle, Eclipse ADT, etc.)"
Browse location Project and press "OK" button.
Wait until android studio complete.
Please Select "Don't remind me again for this project" sometimes update gradle version cause error.