title: AChartEngine And Android Studio
body: <p>I have to create an application that makes extensive use of charts. 
  Reading the web I chose achartengine that seems to have everything I need. </p>
  
  <p>I downloaded the jar file, I plugged in the libs folder, I selected "add to library" and I lunch the gradlew clean. 
  Result in the sources where I do the import of org.achartengine.xxxx I always returned the error that fails to resolve symbols . </p>
  
  <p>Do you have suggestions? 
  Thank you 
  Andrea</p>