Hey,
I’ve had a problem which was a layout z-index problem. When I click my search button, some layout objects did not make that transparency and they were just on the top side of the background.
Fortunately, I found an extremely basic solution. ( I did not know that Android layout works like that :) )
So, Android xml layout works the orders of Views. If you want to make an object on the top side, it should be on the lowest side on the xml file.