title: Android notification icon color is not changed when background color is white
body: <p>I upgraded android 6.0 and my app have problem.</p>
  <p>when the status bar background color is not white, notification icon is good.
  (notification icon png has white and alpha only)</p>
  <p>but if some apps change background color to white, my notification icon isn't inverted to black.</p>
  <p>How can I invert white notification icon to black when status bar background color set white by other app? (I'm not saying how can I use color icon.)</p>
  <p>below image shows a problem.</p>
  <p><strong>normal status</strong>
  <a href="https://i.stack.imgur.com/LbOgB.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/LbOgB.png" alt="normal status image" /></a></p>
  <p><strong>when changed background color to white, my icon is not changed to black only</strong>
  <a href="https://i.stack.imgur.com/p0Dp8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/p0Dp8.png" alt="with white background color image" /></a></p>
  <ul>
  <li><p>Notification build code</p>
  <pre><code>  Notification.Builder mBuilder =
            new Notification.Builder(context)
                    .setSmallIcon(R.drawable.ic_notifications_none)
                    .setPriority(priority2)
                    .setOngoing(true);
  
    mBuilder.setContent(generateMessageView(message));
  
    Intent notificationIntent = new Intent(context, MainActivity.class);
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP 
                              | Intent.FLAG_ACTIVITY_SINGLE_TOP);
  
    PendingIntent intent = PendingIntent.getActivity(context, 0,
            notificationIntent, 0);
    NotificationManager mNotificationManager =
            (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    mBuilder.setContentIntent(intent);
    mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
  </code></pre>
  </li>
  <li><p>values-v23/styles.xml</p>
  <pre><code>  &lt;style name=&quot;AppTheme&quot; parent=&quot;android:Theme.Material.NoActionBar&quot;&gt;            
    &lt;/style&gt;
  </code></pre>
  </li>
  </ul>
  <p><strong>Found a solution</strong></p>
  <p>I added notification icons to drawable directory not drawable-*dpi. Now it's working.</p>