title: How to use the ProGuard in Android Studio?
body: <p>This is my first project in Android Studio, and the code of my apps are not obfuscated.
  Im using this configuration in build.gradle file:
  <img src="https://i.stack.imgur.com/RG7CL.png" alt="enter image description here"></p>
  
  <p>I'm using the Build > Generate Signed APK... with the Run Proguard checked.
  And, when I have tested using the Apk_OneClick.v4.2, my code is completly easy to read:</p>
  
  <p><img src="https://i.stack.imgur.com/ymWHj.png" alt="enter image description here"></p>
  
  <p>Please, help-me. :(</p>