Create a transparent dialog on top of activity

Question

Background

I\'m trying to put a layer on top of the current activity which would have explanation of what is going on on the current screen, similar to what occurs on

Answer 1

Just change the background color of your Dialog:

dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));

Edit:

This prevents the dim effect:

dialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);