A small application that shows how to implement networking and image caching in a scalable way without using any libraries.

Find the apk here uber-photos-apk.zip

It is a very simplified version of MVVM. The fragment interacts with viewModel. I refrained from making the viewModel reactive as I thought the whole point of no-library-use was to to see how we can handle basics of OOPs.

An instance of UberNetworking is responsible for executing network requests. Network requests are modelled through Request class. Response is returned in the form of Success or ErrorResponse.

Dali is our image fetching and caching framework. It uses ThreadPoolExecutors to fetch images and then load them in the imageView. It has helpful extension functions on ImageView.