Recipe app modification

Hi, i need these quick modifications on my android application, demo is attached Things to be added: * Validate if there is new information on external database if there is, download it and insert it on local database(i will provide json webservice) * Add categories screen, in this screen user should be able to select a category, which should lead the user to recipe list screen. * The search functionality should be searching in all the categories indicating to which category belong. add the search functionality to categories screen. * Social sharing integration. Recipe list screen: * Add the functionality where user click on image an can see the image in bigger size and browse the other images (if there are)