search using searchview in the action bar. I have done this in my project. it directly communicate to the database using json and it works fine, if you want to search all the title, author, ISBN, etc i will do it, for example the user will just type the keyword whether title, author, ISBN, etc no need to select in the spinner whether title or author, we will just place a hint word in the searchview like "search title or author". and if you want it by 24-48 hrs i'll try my best to give the source code (java and php code) to you with comments.
i'm using android studio.