title: How can set the fix height to SMART_BANNER
body: <p>How can I set the fix height to SMART_BANNER. I'm trying every way to do that and I read the following documentation:</p>
  
  <p><a href="https://developers.google.com/mobile-ads-sdk/docs/dfp/android/banner" rel="nofollow noreferrer">BANNER</a> ,
  <a href="https://firebase.google.com/docs/reference/android/com/google/android/gms/ads/AdSize" rel="nofollow noreferrer">AdSize</a></p>
  
  <p>But it is not working. I'm trying to edit <code>adView.class</code> but it's not enable to rewrite.</p>