Is there a way to set drawable's Alpha using XML?

Question

Easy like itself . I wanna make an alpha button , which would have a selected drawable this way:

Answer 1

My goal was to make a button have it's selected and pressed states at a different alpha - but using the same (png) resource and affecting as few files as possible.

My solution is similar to altering the alpha in a BitmapDrawable - but it does it from the selector so only one file is affected.

Use the tint function of Bitmap, remember that the tint will color the existing pixels so use a white color. Eg, #80FFFFFF - to keep color as original but reduce alpha by 50% This could also be used to change color of the icon when pressed.

This is my drawable XML file: