title: How to include Zxing library to android project?
body: <p>I have read some answer for this question in stackoverflow, but it is not working for me. I have already a project, and now I want to integrate QR Code and barcode reader into my project.</p>
  
  <p>I downloaded the zip file from: <a href="https://code.google.com/p/zxing/downloads/list" rel="nofollow" title="version 2.2">core-2.2.zip</a></p>
  
  <p>I didn't find any "core.jar", I read that I have to integrate files added in "core" folder. Do I have to add all classes to my project (the whole folder)? or do I have to create a jar file with that folder?</p>
  
  <p>I am using Android Studio. Any one can help me? thank you</p>