kmm-production-sample VS compose-samples

Business logic is not only about backend. Apps usually have a lot of client-side logic that can be written once in KMM and used on both platforms. See [1] for a high level architecture diagram.

I'm an iOS dev and I've been using KMM on a couple of projects for more than a year now. It's really a powerfull technology which allows teams to move faster, but there are downsides, for example lack of native Swift interop, though there are opensource tools trying to solve this [2].

[1]: https://github.com/Kotlin/kmm-production-sample/tree/master#...

I'm an Android dev for 10+ years and I've decided to give a go with Kotlin Mobile Multiplatform to try iOS development as well. For that purpose I would need a Mac obviously, and Windows 11's flaws don't help either so I made my mind and I would like to pick a Mac as my next developer machine for the next 4-5 years.

I don't use iOS, but https://kotlinlang.org/lp/mobile/ claims that using Kotlin works on iOS too. You still will need a Mac though, but that's pretty much a given if you want to develop iOS apps.

Kotlin Multiplatform with Realm as a middle layer.

Kotlin Multiplatform. You write the UI fully native for each platform, but have all the business logic as shared code.

maybe people confused it with kotlin multiplatform mobile which indeed support ios but only the business logic. you have to write the ui in swiftui.

I think the most compeling use for Kotlin Native is mobile. I wonder if it's possible to write a Kotlin multi-platform library that can then be used from the JVM, JS, iOS and Android? What would such library look like from the other languages? This is something I am trying to find out right now, and Kotlin Multiplatform seems to be the only sane choice to do this (but I am not sure yet that it's actually good/possible right now). Any more information about this would be appreciated.

Kotlin isn't just JVM and Kotlin projects like this one for writing iOS+Android apps look quite promising: https://kotlinlang.org/lp/mobile/

The official documentation provides a comprehensive guide on the basics of Jetpack Compose, components, layouts, theming, and more advanced topics.

Apparently Jetpack Compose is an Android copy of SwiftUI?

https://developer.android.com/jetpack/compose

Only two HN threads with comments: https://hn.algolia.com/?q=jetpack+compose

If you want to take a look at code, we have the Jetnews sample app that support different screen sizes. And Jetcaster also implements features such as table top mode.

check this out : https://github.com/android/compose-samples/tree/main/Crane

So I would say that instead if learning everything from Android SDK, you should just set a goal to create some app. Learn about Activities, their lifecycle, layouts (or Compose if you want to be more up to date). Try to implement your app based on this. Then improve your app using Fragments and their lifecycle. If you truly want to understand Views, which are essentially the building blocks of Android UI then I would recommend implementing your own custom View, which will have completely custom look - it is cool thing to try and you will learn how it all works inside.

The compose samples by Google are a good reference to look into: https://github.com/android/compose-samples

Basic understanding of Jetpack Compose.

The compose-samples repo has a comprehensive list of samples ranging from low to complex projects which might be worth a look.

For instance, there is a link to this repository, that contains all sorts of samples, that are up to date and ready to use. That's cutting edge, which is a recommended start.