A flexible, modern Android app architecture

This article aims to demonstrate the practical side: to teach Android architecture by example. Most importantly that means showing how various architecture decisions are made. We will encounter situations where there are several possible answers, and in each case we will fall back on the principles rather than rote-learning a set of rules.

JetBrains and outside open-source contributors have been diligently working on Compose Multiplatform for several years and recently released an alpha version for iOS. Naturally, we were curious to test its functionality, so we decided to experiment with it.

CatchUp turned 7 recently. I started the project in the spring of 2016 and open-sourced it a little over a year later. Its development has ebbed and flowed over the years, but it still serves its primary purpose well: a playground.

Large classes are a result of the "one more thing" problem. You have a perfect class that does one thing, and your users like it. However, they want it to do one other thing and another and then another. Before we realise it, the class becomes responsible for many different things.

Saving tokens securely when using OAuth2 is often mishandled, even in tutorials, so we decided to implement the recommendations from the official specification by ourselves. Let us introduce you to our new open-source library – auth-worker.