title: How do i extend multiple classes in Android Studio?
body: <p>I am following a tutorial on YouTube yo request permissions
  at runtime. I created a Java Class called: AbsRuntimePermission and i have to extend it on my MainActivity.
  But i also have to extend AppCompatActivity, is there a way to extend both?
  Because if i try that it will give me a error:</p>
  
  <pre><code>Class cannot extend multiple classes
  </code></pre>
  
  <p>And i am trying like this:</p>
  
  <pre><code>public class MainActivity extends AppCompatActivity, AbsRuntimePermission {
  </code></pre>
  
  <p>I hope someone can help me out, i am following this tutorial:
  <a href="https://www.youtube.com/watch?v=b0pqDwsCEfs" rel="nofollow">https://www.youtube.com/watch?v=b0pqDwsCEfs</a></p>