Generic Android App with Google Spreadsheet as backend (Challenge)

Generic Android App with Google Spreadsheet as backend (Challenge) This is a general app for developer to be taken as challenge, it may be assigned to more then one developers. Once you get back with a good working app, you will be given multiple follow up work on it. - Native App with Google Material Design Themes (use some readymade theme preferably) - App shall use Google Login (You need to use your Google API credentials and then transfer to our Google cloud api console at the time of delivery) - Except the mandatory requirements for the App, all other content including menu items, content (text, images, videos), organized tabular data, settings remains on a central google spreadsheet. Accessed using Spreadsheet API or options provided by google (like JSON, CSV, Google App script HTML service, Web) - The app also post any data (Google User registrations, Google User logins) and 2 native forms(with upto 10 fields each (no attachments)) to a google Spreadsheet (one sheet per form). - The app will have 5 Views , that will take data from 6 sheets in google spreadsheet and display them with different UIs 1 - Tabular view, 2 - Card view with image, 3 - List Views (with touch to expand) 4 - Chat like view 5 - Images gallery view (urls from a sheet) 6 - Native Maps view (coordinates & name from sheet) * Views will only read data and show (no editing) ALso all data in these sheets except 2 forms will be manually entered using spreadsheet (there are no need for additional forms, apis etc) * Single view will normally show 10 records, each sheet will normally have upto 500 records only. * Images etc will be in google drive and url will be included in the spreadsheet This is Generic App and no specific usage is to be assumed in advance. Good knowledge of Google APIs and fast learning capabilities is necessary requirement for you to do this work. There is absolutely no backend other than spreadsheet. No data will be provided to you, you shall make your own spreadsheet with sample data first. Once you have it working, I will populate more data for testing. You can ask question if any, once the work is assigned you have to get back with a fully working app without much intermediate discussions. You you have some other ways to achieve this faster, you can suggest and I can approve.