Fix Bugs in my android launcher

i have 2 bugs in this app 1st bug: or app is for education aka the one with the bookshelf the one you'll be working on this time is the one with the bookshelf basically there's a refresh button on the bookshelf page that stands the device for all PDF files and then adds them to the bookshelf however is not doing this this is what I need fixed the 2nd bug: the bookshelf page is to high it cuts off half of the refresh button I need that fixed