How to change dialog background color programmatically?

Question

I have a main activity where users can change (via preferences) the background colour to their favourite colour. My problem is that I can not change the background colour o

Answer 1

I found a one rule solution!

d.getWindow().setBackgroundDrawableResource(R.drawable.menubackground);

It works for me with a normal dialog. But I dont know if it works on an AlertDialog.