I've written 2 good apps now (one on the playstore) and i feel like i'm reusing the same code. In fact, I copy and pasted code from the first app into the second and it worked without me editing anything. I'm still generally new to android development so i'm looking for better ways to do things since I sort of just hack together everything in my apps.

How would you guys suggest reducing code duplication across projects? I was thinking about creating a library that makes it so that you can hook up custom adapters and in 1 line or a cli that generates components for you (just like the Laravel framework cli if you're familiar with that)