KMM Kickstart For Android Developers

Overview of the KMM ecosystem for Android developers. We're hiring and training folks, so pushed the basics into a bunch of slides. https://touchlab.co/careers-3/

Transcript

1. KMM Kickstart For Android Developers Kevin Galligan
2. Touchlab
4. KMM Kickstart For Android Developers:
5. KMM Kickstart For Android Developers: we’re hiring
6. Xcode Frameworks K/N Threading Linker?
7. You fell victim to one of the classic blunders!
8. We’ll Cover • Overview of KMP/KM M • Status/future of the tec h • KaMP Ki t • Architecture Thought s • Tool s • Next Steps
9. Technology Definitions
10. Kotlin Multiplatform (KMP)
11. Common JVM JS Native
12. It’s the interop generally very good
13. Common JVM JS Native
14. Common JVM JS Native iOS Mac Linux Windows Android/NDK Wasm Others… Java-6 Java-8 Android Browser Node Typescript(?)
15. Kotlin Multiplatform Mobile (KMM)
16. KMM •is mostly a branding designation (it’s still KMP ) •has a dedicated website and docs to help get starte d •has an Android Studio plugin built just for mobile (ish)
17. Why KMP/KMM?
18. kot·lin mul·ti·plat·form /ˌkätˈlin məltiˈplatfôrm,ˌkätˈlin məltīˈplatfôrm/ noun noun: kotlin multiplatform 1.optional, natively-integrated, open-source, code sharing platform, based on the popular, modern language kotlin. facilitates non-ui logic availability on many platforms.
19. kot·lin mul·ti·plat·form /ˌkätˈlin məltiˈplatfôrm,ˌkätˈlin məltīˈplatfôrm/ noun noun: kotlin multiplatform 1.optional, natively-integrated, open-source, code sharing platform, based on the popular, modern language kotlin. facilitates non-ui logic availability on many platforms. Oh, and JetBrains!
20. Shared Native Code not “cross platform”
21. Android is Kotlin half of it isn’t “cross platform”
22. Not (necessarily) UI Compose and Swift UI compatible!
25. Low Risk bigger orgs worry about such
26. Memory Lane
27. 2020 is KMP’s year it’s all coming together
29. https://kotlinlang.org/lp/mobile/case-studies/
31. KMM Developer https://touchlab.co/careers-3/
32. KMM Developer https://touchlab.co/careers-3/ (Remote, now and post-pandemic)
33. KMM Status it’s complicated
34. https://kotlinlang.org/docs/mobile/kmm-evolution.html Kotlin/JVM Stable Kotlin/Native Runtime Beta Multiplatform Gradle plugin Beta Kotlin/Native interop with C and Objective C Beta CocoaPods integration Beta Multiplatform IDE support Alpha KMM plugin for Android Studio Experimental
36. https://www.youtube.com/watch?v=L8Xq15NTuCc
37. KaMP Kit
39. May 2021 where are we?
40. https://kotlinlang.org/lp/mobile/
42. First 5 Minutes hit the ground running
45. Alternatives we like…
46. https://github.com/joreilly/PeopleInSpace
47. https://github.com/joreilly/PeopleInSpace
48. https://github.com/Kotlin/kmm-production-sample
49. But Compose?! one new thing at a time
50. OK, Actually Starting they say never live code…
51. OK, Actually Starting they say never live code…
52. General Patterns what we’re seeing
53. Specific Modules
54. Analytics Android Framework Android Stuff iOS Stuff
55. Shared Architecture
56. Analytics Android Framework Android Stuff iOS Stuff
57. App Stuff Android Framework Android Stuff iOS Stuff
58. KaMP Kit is Shared Architecture
60. I’m mostly not UI layer
61. LinearLayout FTW Compost? fill_parent?
62. App Stuff Android Framework Android Stuff iOS Stuff
63. App Stuff Framework
64. App Stuff Framework lambda lambda
65. App Stuff Framework VM/Lifecycle Coroutines
66. Android is pretty simple iOS is a debate
67. App Stuff Framework lambda VM/Lifecycle Coroutines
68. Compiler Created Interfaces call suspend functions from iOS
69. Community Libraries
70. Working on a thing coming soon…
71. App Stuff Framework VM/Lifecycle Coroutines VC/Lifecycle- Aware Coroutine Scope/ Interface Manager
72. App Stuff Framework lambda VM/Lifecycle Coroutines
73. Libraries
74. Libraries • SQLDelight (DB ) • Ktor (Networking ) • Kotlinx.Serialization (Json ) • Kotlinx.Coroutines (Async/ Concurrency) • Kermit (logging ) • Multiplatform Settings (Key/Value ) • Stately (K/N Concurrency ) • Koin (DI/not-DI?)
76. CREATE TABLE Breed ( id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT, name TEXT NOT NULL UNIQUE, favorite INTEGER NOT NULL DEFAULT 0 ); selectAll: SELECT * FROM Breed; selectById: SELECT * FROM Breed WHERE id = ?; selectByName: SELECT * FROM Breed WHERE name = ?; insertBreed: INSERT OR IGNORE INTO Breed(id, name) VALUES (?,?); deleteAll: DELETE FROM Breed; updateFavorite: UPDATE Breed SET favorite = ? WHERE id = ?;
77. public data class Breed( public val id: Long, public val name: String, public val favorite: Long ) { public override fun toString(): String = """ |Breed [ | id: $id | name: $name | favorite: $favorite |] """.trimMargin() }
78. public interface TableQueries : Transacter { public fun <T : Any> selectAll(mapper: ( id: Long, name: String, favorite: Long ) -> T): Query<T> public fun selectAll(): Query<Breed> public fun <T : Any> selectById(id: Long, mapper: ( id: Long, name: String, favorite: Long ) -> T): Query<T> public fun selectById(id: Long): Query<Breed> public fun <T : Any> selectByName(name: String, mapper: ( id: Long, name: String, favorite: Long ) -> T): Query<T> //Yada yada }
79. Tools
80. Android Studio obviously
82. Xcode you’re *definitely* going to use Xcode
83. https://github.com/touchlab/xcode-kotlin
84. Some More Info
85. Kotlin/Native Concurrency
86. Common JVM JS Native
88. Two Rules it’s actually pretty simple
89. Mutable == 1 thread
90. Immutable == many threads
91. Immutable means Frozen call freeze()
93. Xcode Frameworks like AAR’s (kind of)
94. Xcode Frameworks like AAR’s (kind of)
95. Xcode Frameworks like AAR’s (kind of)
96. Interface is Objective-C swift is pretty good at talking to Objc
97. Analytics Android Framework Android Stuff iOS Stuff
98. Analytics Android Framework Android Stuff iOS Stuff Tax Calc Framework
99. Analytics Android Framework Android Stuff iOS Stuff Tax Calc Framework
100. https://www.youtube.com/watch?v=hrRqX7NYg3Q
101. Touchlab
102. What’s Next?
103. KaMP Kit Docs • More on Concurrenc y • “Selling” to your tea m • Some info on integrating with existing project s • Other assorted docs
104. Kotlin Slack this is critical
105. https://kotlinlang.org/lp/mobile/
106. Final Words quick Touchlab pitch
108. KMM Developer https://touchlab.co/careers-3/
109. KMM Developer https://touchlab.co/careers-3/ Will train Android devs!
110. KMM Developer https://touchlab.co/careers-3/ (Also looking for KMP/KMM experts)
113. Thanks! @kpgalligan touchlab.co