I started with this framework few years ago with my first Android application and made similar framework with similar classes for iOS too so I could write more easily two applications from my client fro both platforms, one for Android and other for iOS while keeping similar structure of code. Then framework mutated as I was easily developing apps further and 3 months ago I rewrote this framework to kotlin and polished while removing large old unused parts with idea to release it for others and showcase how I code for development clients or companies who can hire me for software development.
I did not try to re-invent the wheel but with background from multiple platforms and languages I just see how things can be done nicely without some over-complexities of Android framework like activities lifetime, fragments, java listeners and so on. For example I missed event classes similar to that used in c# and other programming patterns, like Navigation from iOS so I made them. I am sure there are number of other libraries that already has those features, with some pros and cons, but I was able to keep this code functional and useful for me for quite a few years so I dont need to look for code from others that can be quite difficult to fix if problems happens. I always tried to use good libraries, but for example CSEvent classes are quite old maybe 7 years now, and are still quite useful and well tested by time. So I believe it's good time to share this with some guide how this can be used for rapid and high quality application development.