After searching I only found how to set shadow&light effect to texts,how do I put shadow effect on a view, to make the edge between views more clear?
I know that you can set the background image with shadow effect to the view. But this does not really solve the problem unless I learn how to generate those images first.
You can also place dummy
Viewelement at edges in layout. Set its background to a drawable xml with a gradient going black to transparent.