title: Cannot refer to imported jar-library in Android Studio project
body: <p>I have imported an external jar-library <code>find-local-devices.jar</code> into Android Studio project. I've put it into <code>libs</code> folder, right-clicked and chosen <strong>Add as library</strong>, ensured about dependency in <code>build.gradle</code>, cleaned and built again the project - everything as described, e.g., <a href="https://stackoverflow.com/questions/16608135/android-studio-add-jar-as-library">here</a>.
  , but I cannot still use the classes from jar:</p>
  
  <p><a href="https://i.stack.imgur.com/AnzK2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AnzK2.png" alt="enter image description here"></a></p>
  
  <p>Could somebody tell me what I do wrong?</p>