title: Transparent notification background in Android
body: <p>I want to create Android notification with transparent background. I'm using bigContent with remoteViews to create my own layout, but when i set background color of main layout to @android/color/transparent nothing happens. I still see standard white background of notification.</p>
  
  <p>How can I set transparent background on Android notification? 
  I note that i don't mean notification bar (or status bar) but background of custom notification.</p>