build a prototype of a Simple Android gallery app with search function based on tags assigned to images

Note: the following is a description of the complete app, bid based on what you think is suitable for a prototype, i will discuss immediately with you about how should the prototype be a basic gallery app that displays pictures normally with one more feature, which is allowing users to search for a specific photo, search index is basically based on few keywords which were assigned by the user to each photo, so the app will contain mainly two activities, one that allows user to search for the photo or video, and the other one allows the user to assign keywords or tags to a photo. attached files are sketches of the two required screens, and one notification bar screen, described as the following: [login to view URL]: this is the main screen that appears at first once the user runs the app #1 is the search bar #2 is the image/video thumnail #3 displays tags or keywords assigned to the image, and clicking on it allows the user to edit,add or remove tags [login to view URL]: this screen displays recent images (any new image added to the device) thats awaiting to be tagged, this screen shall be accessible anytime while the user is on the main screen, could be through a side menu or any convenient way u like, and another way to access it is by the notification bar* [login to view URL] the app shall notify the user with recent/new images and videos, it apears in the notification bar just like any normal notification and it should be clickable, the notification message will inform the user that he got new images that needs to be tagged, and clicking on it will display the "tags" screen #1 the message that informs the user with the new images