title: Export Android java application files to device .apk
body: <p>I have just started using Android Studio to learn app development.</p>
  
  <p>I am attempting to run an existing complete android project on github on my android device. The project contains a 'res' and 'src' folder which contains multiple .java files for the application.
  Other files include github relevant files like the .project, .gitignore, readme etc 
  How can I convert these files into a .apk file that can be run on my device?</p>