title: ViewPage.addOnPageChangeListener method cannot be resolved
body: <p>I want to add an OnPageChangeListener to my ViewPager. I am using compileSdkversion 24. 
  But when i try to use the addOnpageChangeListener method it cant be resolved: </p>
  
  <pre><code>viewPager.addOnPageChangeListener(PageListener);
  </code></pre>
  
  <p>but when i use the setOnpageChangeListener method it works fine: </p>
  
  <pre><code>viewPager.setOnPageChangeListener(PageListener);
  </code></pre>
  
  <p>But should I use the add method?</p>