title: how to change notification background color in nougat?
body: <p>How do i change notification background in android? </p>
  
  <p>I am using <code>androidx.core.app.NotificationCompat</code> and below code work for Oreo and above Oreo device but not working for below Oreo devices.</p>
  
  <pre><code> builder = new NotificationCompat.Builder(this, CHANNEL_ID)
              .setSmallIcon(R.mipmap.ic_launcher)
              .setContentIntent(pendingIntent)
              .setShowWhen(false)
              .setStyle(new NotificationCompat.DecoratedCustomViewStyle())
              .setCustomContentView(notificationLayout)
              .setColor(ContextCompat.getColor(PlayerEngineService.this, R.color.colorBlack))
              .setColorized(true);
  </code></pre>
  
  <p>I make custom notification <code>View</code> with black background. But other then notification view notification background is white.</p>
  
  <p><a href="https://i.stack.imgur.com/uveNd.png" rel="nofollow noreferrer">Right it's look like this.</a></p>
  
  <p>Thanks in Advance </p>