The rollercoaster of releasing an Android, iOS, and macOS app with Kotlin Multiplatform | KotlinConf

With the rise of Kotlin Multiplatform, the possibility of expanding to multiple platforms has increased, especially for Android Developers. It's easier than before to build for other platforms.

But how to release your app to multiple platforms?

In this talk, I will share all the things I've learned around distributing FeedFlow, an Android, iOS, and macOS app built with Kotlin Multiplatform, coming from an Android development background.

We will cover the deployment of the binary, automating everything with CI, crash reporting, logging, internationalization, and all you need to know to successfully distribute your KMP app.

Transcript

1. The rollercoaster of releasing an Android, iOS, and macOS app with Kotlin Multiplatform Marco Gomiero @marcoGomier Senior Android Developer @ Airalo Google Developer Expert for Kotlin
2. @marcoGomier feedflow.dev/ FeedFlow
3. @marcoGomier feedflow.dev/ FeedFlow
4. @marcoGomier FeedFlow feedflow.dev/
5. @marcoGomier Android • “Easy” for an Android Developer • Sign the app • Upload to Play Store
6. @marcoGomier • Sign the app • Provisioning profiles • Upload to TestFlight • All handled by Xcode (or manually on the CI) iOS
7. @marcoGomier • JAR • “Manual” distribution • App Store macOS ❌
8. @marcoGomier No Xcode, need to go manual \o/
9. @marcoGomier macOS - “Manual” distribution • Sign the app • Notarization
10. @marcoGomier
11. @marcoGomier macOS - “Manual” distribution • Sign the app • Notarization • Distribute the app
12. @marcoGomier
13. @marcoGomier macOS - App Store • Sign the app • Provisioning profiles • Upload to TestFlight
14. @marcoGomier Upload to TestFlight: Transporter (or CI) https://apps.apple.com/us/app/transporter/id1450874784?mt=12
15. @marcoGomier
16. @marcoGomier Fixed with Compose 1.6.10 https://github.com/JetBrains/compose-multiplatform/pull/4271
17. @marcoGomier compose { desktop { application { macOS { minimumSystemVersion = "12.0" } } } } }
18. @marcoGomier
19. @marcoGomier https://developer.apple.com/documentation/security/app_sandbox/protecting_user_data_with_app_sandbox
20. @marcoGomier
21. @marcoGomier https://github.com/xerial/sqlite-jdbc/tree/master/src/main/resources/org/sqlite/native/Mac/aarch64
22. @marcoGomier Target-specific assets compose.desktop.application.nativeDistributions { appResourcesRootDir.set(project.layout.projectDirectory.dir("resources")) } @marcoGomier
23. @marcoGomier val isSandboxed = System.getenv("APP_SANDBOX_CONTAINER_ID") != null if (isSandboxed) { val resourcesPath = System.getProperty("compose.application.resources.dir") // sqlite-jdbc System.setProperty("org.sqlite.lib.path", resourcesPath) System.setProperty("org.sqlite.lib.name", "libsqlitejdbc.dylib") }
24. @marcoGomier 🎉
25. @marcoGomier Crash Reporting & Logging
26. @marcoGomier Firebase Crashlytics
27. @marcoGomier https://github.com/touchlab/CrashKiOS
28. @marcoGomier Firebase Crashlytics Sentry Java SDK
29. @marcoGomier https://github.com/touchlab/Kermit
30. @marcoGomier internal expect fun crashReportingLogWriter(): LogWriter actual fun crashReportingLogWriter(): LogWriter = CrashlyticsLogWriter() actual fun crashReportingLogWriter(): LogWriter = SentryLogWriter()
31. @marcoGomier I18n
32. @marcoGomier https://github.com/adrielcafe/lyricist
33. @marcoGomier val feedFlowStrings: Map<String, FeedFlowStrings> = mapOf( Locales.It to ItFeedFlowStrings, Locales.En to EnFeedFlowStrings, Locales.De to DeFeedFlowStrings, ) Text(strings.searchHintTitle) let strings = feedFlowStrings["it"] ?? EnFeedFlowStrings Text(text = LocalFeedFlowStrings.current.feedUrl)
34. @marcoGomier More reading https://www.marcogomiero.com/posts/2024/kmp-app-ci
35. > Twitter: @marcoGomier > Github: prof18 > Website: marcogomiero.com > Mastodon: androiddev.social/@marcogom Thank you, and don’t forget to vote
36. Bibliography / Useful Links • https: / / feedflow.dev/ • https: / / help.apple.com/itc/transporteruserguide/en.lproj/static.html#apd70774093eddb4 • https: / / developer.apple.com/documentation/security/app_sandbox/protecting_user_data_with_app_sandbox • https: / / github.com/JetBrains/compose-multiplatform/blob/master/tutorials/Native_distributions_and_local_execution/ README.md#adding-files-to-packaged-application • https: / / firebase.google.com/products/crashlytics • https: / / docs.sentry.io/platforms/java/ • https: / / github.com/touchlab/CrashKiOS • https: / / github.com/touchlab/Kermit • https: / / github.com/adrielcafe/lyricist • https: / / www.jetbrains.com/help/kotlin-multiplatform-dev/compose-images-resources.html#strings • https: / / www.marcogomiero.com/posts/2024/kmp-ci-android • https: / / www.marcogomiero.com/posts/2024/kmp-ci-ios • https: / / www.marcogomiero.com/posts/2024/kmp-ci-macos-github-releases • https: / / www.marcogomiero.com/posts/2024/kmp-ci-macos-appstore • https: / / www.marcogomiero.com/posts/2024/compose-macos-app-store/