Hi folks! I hope you all good! Had a quick questio...

# multiplatform

[Marc Planas]

Hi folks! I hope you all good! Had a quick question. I’m building an android app with compose and kotlin (centralizing the view models and the logic in a Shared module KMP), if i want to implement the iOs app Ui, can I move the Compose UI from the android module to the Share module and it will work? Or the compose multiplatform need tricky things?

Thank you in advance for your response ❤️

[Joel Denke]

Both yes and no, depends which libraries using in android app 🙂
In general its not an issue, when doing plain Kotlin things not platform dependant things, like androidx lifecycle library or such.

[Gastón Saillén]

You will need to also config the main app that opens inside iOS and Android , should be quick , but as Joel says , if you are using specific Android libs you will need to find a multiplatform one to switch it to

[Gastón Saillén]

I recommend precompose as it has navigation, DI and view model with all lifecycle handled

[Joel Denke]

What you can do, go to like kmp.jetbrains.com, create a new project. Then test copy paste your code in current Android app into the androidMain folder for Kotlin files. And res things as usual in root folder of androidMain.
Then you will notice which things work vs not.

[Joel Denke]

If you use Ktor and Koin they already multiplatform. androidx datastore, android collection and androidx paging I think is KMP as well.
You cannot use like androidx navigation compose in KMP. For that I would replace with Circuit, I think is the closest you get. You can ofc also check Voyager and Precompose if prefer those.

[Joel Denke]

And for the things you cannot directly share in common/shared, you can still using native Android things, by using expect/actual with interfaces and such, to be able call Android SDK things from commonMain 😜

[Joel Denke]

So in each platform, even iOS, Wasm, Desktop etc youre able to implement native things as you wish, and even get interop in each target platform.

[Marc Planas]

I started already with the multiplatform template and i’m already using Ktor and Koin for the request, in fact, i got all the repositories and view models on the Shared module, but yes i used some libraries for Ui things, like a graph library, but is it’s writen in compose, that makes it ? Or should it be explicit compose-multiplatform?

[Joel Denke]

Compose multiplatform using a separate gradle plugin, which syncing all androidx compose libs, such as Material 3 etc.
Just be aware depending on CMP version using, the combination of androidx compose libs available differs. You can override it, but I dont recommend doing so.
Meaning could almost see CMP of being equivalent to BOM thing, not same but similar.
In that way it will be possible to use all compose libs in desktop, iOS, Android from commonMain 😜

[Joel Denke]

Not entirely sure whats happening if a library itself using transitive dependency to compose. I think as same package names used in CMP, it will be resolved correct if the lbirary added in commonMain, but not entirely sure to be honest.