Elevation not working for ImageView

Question

Elevation for ImageView is not working. I declared ImageView in XML like this:

Answer 1

The elevation shadow is derived from the background drawable of a View. If your ImageView has no background, you'll see no shadow.

If you want to change that behavior, you need to build your own ViewOutlineProvider and call View.setOutlineProvider() to set it (and this is not trivial).