title: SimpleExoPlayerView customization to keep background transparent and controls always visible
body: <p>I'm using <code>ExoPlayer</code> to play audio songs, here is how my <code>SimpleExoPlayerView</code> looks like:</p>
  
  <pre><code>&lt;com.google.android.exoplayer2.ui.SimpleExoPlayerView
    android:id="@+id/video_view"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" /&gt;
  </code></pre>
  
  <p><strong>Result:</strong></p>
  
  <p><a href="https://i.stack.imgur.com/ISRaz.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ISRaz.jpg" alt="enter image description here"></a></p>
  
  <p><strong>Requirement:</strong></p>
  
  <ol>
  <li><p>How to keep <code>SimpleExoPlayerView</code> background as <em>transparent</em>, instead of <strong>Black background</strong> [as still, I'm getting] (see above <em>Screenshot</em>)</p></li>
  <li><p>How to keep <code>SimpleExoPlayerView</code> always <em>visible</em> (as still it appears and then disappear, until I touch again)</p></li>
  </ol>