title: How to import a java package in Android Studio
body: <p>I'm new in android, and I want to import the jfftpack to my project in android studio anda i don't know how to import it. </p>
  
  <p>The original code was import ca.uol.aig.realdoublefft and I'don't know where to put the java files. I've tried to put them to a libs folder.</p>
  
  <p>here's the jfftpack source code: </p>
  
  <p><img src="https://i.stack.imgur.com/DsPco.jpg" alt=""></p>