title: how to make single AAR file, having some other AAR files
body: <p>Could you help me to understand the general concept of building android library and use it in user's application.</p>
  
  <p>So, there is following situation:</p>
  
  <p>In android studio there are following modules:<br/>
  <strong>core</strong><br/>
  <strong>data</strong><br/>
  <strong>drawing</strong><br/></p>
  
  <p>and there is a module<br/>
  <strong>app</strong><br/>
  with dependencies on above modules.</p>
  
  <p><strong>app.gradle</strong></p>
  
  <pre><code>dependencies {
      compile project(':core')
      compile project(':data')
      compile project(':drawing')
  }
  </code></pre>
  
  <p>so I can run the app from Android Studio.</p>
  
  <p>But I would like to have something like AAR file and include it in any app to be able use it again without creation the same modules.</p>
  
  <p>I'm not very familiar with Gradle so I'm not sure is it possible and how to do it.</p>