In android notification, it's seam their is 3 different icons (see the picture below). I know how to set the large icon (via setlargeicon), however i don't know how to set the both 2 small icons as their is only one procedure setSmallIcon available.
It is the same setSmallIcon
for both locations. However, you can also use setColor() to set the background color on the notification - that is how the lower icon gets the blue background.