title: android notification background color is not white on lollipop
body: <p>As we known that Android lollipop force set the notification background color to white, so we can set the style of TextView according to different sdk version by putting style.xml in folder values-v21.</p>
  
  <p>So here comes my question, on some third party ROMs, for example, the EMUI developed by Huawei tech co., the background of notification is not white(nearly black), by setting style to</p>
  
  <pre><code>android:TextAppearance.Material.Notification.Title
  </code></pre>
  
  <p>the color of the text is almost black, as a result, we cannot see the text clearly. I had been searching the internet for almost two days but find nothing helps.</p>
  
  <p>I am trying to get the color of the notification background and set the text color dynamically, but I don't know how to accomplish this.</p>
  
  <p>Need your help, thanks a lot.</p>