Mobile Catalog

I need an application that will work on Android devices to display categorized images. * There should be a set of main categories, and under those categories there should be sub levels. The number of sub levels could be many. * At each level set of images should be assigned/displayed. Images will shown with their thumbnails at first an then, when selected the real size will be displayed. The number of images at any level could be many. ex: Stone Wood PVC |_Black Stone (Set of images) |_ Pine (set of images) |_ abc (set of images) |_Strong Stone |_Olive tree |_Abc (set of images) |_black (set of images) |_xyz |_green (set of images) |_onyx (set of images) * Each image may have a name in addition to file name. * The app should work with any screen size. * The categories and assigned images can be managed with an another web page. * The source code should be easy to understood. * MySQL, PHP and jQuery's Mobile API must be used. * Images should be stored at file system not at DB. * There should be search field at the bottom of the page to search images and categories with their names.