And that, folks, is how we shared code between Android, iOS and the Backend | droidcon EMEA

Kotlin Multiplatform is an experimental feature that you can use to share code between different platforms. Even if it is an experimental feature, it is already possible to start using it in production applications.

In this talk, I will share the discussion that led us to Kotlin Multiplatform, and the following processes we put in place to start using it in production for an Android, iOS, and backend project. I will show you what parts of the code you can (gradually) start to share and how to integrate with existing standalone projects.

Transcript

1. droidcon EMEA Marco Gomiero And that, folks, is how we shared code between Android, iOS and the Backend
2. droidcon EMEA - @marcoGomier Marco Gomiero Tech Lead @ Uniwhere Co-Lead @ GDG Venezia > Twitter: @marcoGomier > Github: prof18 > Website: marcogomiero.com
3. droidcon EMEA @marcoGomier Story #1
4. droidcon EMEA - @marcoGomier Alice Mobile Developer
5. droidcon EMEA - @marcoGomier Alice Mobile Developer data class NewsDTO( val id: Long, val author: String )
6. droidcon EMEA - @marcoGomier Alice Mobile Developer data class NewsDTO( val id: Long, val author: String ) data class NewsDTO( val id: Long, val author: String? ) OR
7. droidcon EMEA - @marcoGomier Alice Mobile Developer Bob Backend Developer
8. droidcon EMEA - @marcoGomier Alice Mobile Developer Bob Backend Developer Is author nullable? Mmm, the doc says its not!
9. droidcon EMEA - @marcoGomier Alice Mobile Developer Bob Backend Developer Well, its not working as expected Let me check
10. droidcon EMEA - @marcoGomier Alice Mobile Developer Bob Backend Developer ""...
11. droidcon EMEA - @marcoGomier Alice Mobile Developer Bob Backend Developer Oh, you’re right! Sorry! I’ve changed the value last day!
12. droidcon EMEA @marcoGomier Story #2
13. droidcon EMEA - @marcoGomier Alice Mobile Developer Charlie Product Manager
14. droidcon EMEA - @marcoGomier Alice Mobile Developer Charlie Product Manager Can you now implement this logic on iOs as well? Sure!
15. droidcon EMEA - @marcoGomier Alice Mobile Developer Charlie Product Manager ""...
16. droidcon EMEA - @marcoGomier Alice Mobile Developer Charlie Product Manager I’m just converting Kotlin into Swift!
17. droidcon EMEA - @marcoGomier
18. droidcon EMEA - @marcoGomier
19. droidcon EMEA - @marcoGomier Execution speed
20. droidcon EMEA @marcoGomier How to tackle
21. droidcon EMEA - @marcoGomier How to tackle • Cross Platform solutions (React Native, Flutter, "..)
22. droidcon EMEA - @marcoGomier How to tackle • Cross Platform solutions (React Native, Flutter, "..)
23. droidcon EMEA - @marcoGomier Cross Platform solutions (React Native, Flutter, "..) Unifying UI declaration between platform is complicated
24. droidcon EMEA - @marcoGomier Cross Platform solutions (React Native, Flutter, "..) Unifying UI declaration between platform is complicated Different platforms have different patterns
25. droidcon EMEA - @marcoGomier How to tackle • Cross Platform solutions (React Native, Flutter, "..) • Kotlin Multiplatform
26. droidcon EMEA - @marcoGomier Not about compiling all code for all platforms Kotlin Multiplatform
27. droidcon EMEA - @marcoGomier Not about compiling all code for all platforms Kotlin Multiplatform Share as much [NO UI] code as possible https://kotlinlang.org/docs/reference/multiplatform.html
28. droidcon EMEA @marcoGomier How to approach
29. droidcon EMEA - @marcoGomier In most of the cases you start from an existing project Photo by Jonas Jacobsson on Unsplash
30. droidcon EMEA - @marcoGomier You don’t have enough time for a big rewrite Photo by Ashkan Forouzani on Unsplash
31. droidcon EMEA - @marcoGomier Conference Name - @marcoGomier . └── kmm-project ├── androidApp ├── iosApp └── shared Photo by Ashkan Forouzani on Unsplash
32. droidcon EMEA - @marcoGomier Photo by Erwan Hesry on Unsplash You can choose a little piece of tech stack to start with
33. droidcon EMEA - @marcoGomier • Boring code to write multiple times • Code/feature that centralises the source of truth (i.e. a field is nullable or not) • Code/feature that can be gradually extracted Where to start?
34. droidcon EMEA - @marcoGomier • DTOs • Common Models • Utility methods, aka `object Utils {}` Where to start?
35. droidcon EMEA - @marcoGomier • DTOs • Common Models • Utility methods, aka `object Utils {}` Where to start?
36. droidcon EMEA @marcoGomier Let’s start building
37. droidcon EMEA - @marcoGomier
38. droidcon EMEA - @marcoGomier https://github.com/prof18/shared-hn-android-ios-backend
39. droidcon EMEA - @marcoGomier • Create a new project Let’s start building
40. droidcon EMEA - @marcoGomier Create a new project
41. droidcon EMEA - @marcoGomier • Create a new project • Add the JVM target [if needed] Let’s start building
42. droidcon EMEA - @marcoGomier Add the JVM target [if needed]
43. droidcon EMEA - @marcoGomier Let’s start building • Create a new project • Add the JVM target [if needed] • Setup a Maven repository to share the artifacts
44. droidcon EMEA - @marcoGomier plugins { "//""... id("maven-publish") } group = "com.prof18.hn.foundation" version = "1.0" publishing { repositories { maven{ credentials { username = "username" password = "pwd" } url = url("https:"//mymavenrepo.it") } } } Setup a Maven repository to share the artifacts: build.gradle.kts
45. droidcon EMEA - @marcoGomier • Create a new project • Add the JVM target [if needed] • Setup a Maven repository to share the artifacts • Write some code! Let’s start building
46. droidcon EMEA - @marcoGomier NewsDTO.kt data class NewsDTO( val author: String, val id: Long, val score: Int, val timestamp: Long, val title: String, val type: String, val url: String )
47. droidcon EMEA - @marcoGomier Publish the artifacts ./gradlew publish
48. droidcon EMEA - @marcoGomier Publish the artifacts ./gradlew publish ./gradlew publishToMavenLocal
49. droidcon EMEA - @marcoGomier • Create a new project • Add the JVM target [if needed] • Setup a Maven repository to share the artifacts • Write some code! Let’s start building • Add the new library to the backend and the clients
50. droidcon EMEA - @marcoGomier Android implementation("com.prof18.hn.foundation:hn-foundation-android:1.0.0")
51. droidcon EMEA - @marcoGomier Android interface HNApiService { @GET("hn/topStories") suspend fun getTopStories(): List<NewsDTO> }
52. droidcon EMEA - @marcoGomier ! Backend implementation("com.prof18.hn.foundation:hn-foundation-jvm:1.0.0")
53. droidcon EMEA - @marcoGomier ! Backend routing { get("/hn/topStories") { call.respond(getTopStories()) } } fun getTopStories(): List<NewsDTO> { ""... }
54. droidcon EMEA - @marcoGomier
55. droidcon EMEA - @marcoGomier  And iOs?
56. droidcon EMEA - @marcoGomier
57. droidcon EMEA - @marcoGomier Framework
58. droidcon EMEA - @marcoGomier packForXcode val packForXcode by tasks.creating(Sync"::class) { group = "build" val mode = System.getenv("CONFIGURATION") "?: "DEBUG" val sdkName = System.getenv("SDK_NAME") "?: "iphonesimulator" val targetName = "ios" + if (sdkName.startsWith("iphoneos")) "Arm64" else "X64" val framework = kotlin.targets.getByName<KotlinNativeTarget>(targetName).binaries.getFramework(mode) inputs.property("mode", mode) dependsOn(framework.linkTask) val targetDir = File(buildDir, "xcode-frameworks") from({ framework.outputDirectory }) into(targetDir) } tasks.getByName("build").dependsOn(packForXcode) Auto generated when creating a Kotlin Multiplatform mobile app
59. droidcon EMEA - @marcoGomier packForXcode Auto generated when creating a Kotlin Multiplatform mobile app val packForXcode by tasks.creating(Sync"::class) { group = "build" val mode = System.getenv("CONFIGURATION") "?: "DEBUG" val sdkName = System.getenv("SDK_NAME") "?: "iphonesimulator" val targetName = "ios" + if (sdkName.startsWith("iphoneos")) "Arm64" else "X64" val framework = kotlin.targets.getByName<KotlinNativeTarget>(targetName).binaries.getFramework(mode) inputs.property("mode", mode) dependsOn(framework.linkTask) val targetDir = File(buildDir, "xcode-frameworks") from({ framework.outputDirectory }) into(targetDir) } tasks.getByName("build").dependsOn(packForXcode)
60. droidcon EMEA - @marcoGomier CocoaPods plugin plugins { kotlin("multiplatform") version "1.4.10" kotlin("native.cocoapods") version "1.4.10" } "// CocoaPods requires the podspec to have a version. version = "1.0" kotlin { cocoapods { "// Configure fields required by CocoaPods. summary = "Some description for a Kotlin/Native module" homepage = "Link to a Kotlin/Native module homepage" "// You can change the name of the produced framework. "// By default, it is the name of the Gradle project. frameworkName = "my_framework" } } https://kotlinlang.org/docs/reference/native/cocoapods.html
61. droidcon EMEA - @marcoGomier CocoaPods plugin: shared.podspec https://kotlinlang.org/docs/reference/native/cocoapods.html spec.pod_target_xcconfig = { 'KOTLIN_TARGET[sdk=iphonesimulator*]' "=> 'ios_x64', 'KOTLIN_TARGET[sdk=iphoneos*]' "=> 'ios_arm', 'KOTLIN_TARGET[sdk=watchsimulator*]' "=> 'watchos_x86', 'KOTLIN_TARGET[sdk=watchos*]' "=> 'watchos_arm', 'KOTLIN_TARGET[sdk=appletvsimulator*]' "=> 'tvos_x64', 'KOTLIN_TARGET[sdk=appletvos*]' "=> 'tvos_arm64', 'KOTLIN_TARGET[sdk=macosx*]' "=> 'macos_x64' } spec.script_phases = [ { :name "=> 'Build shared', :execution_position "=> :before_compile, :shell_path "=> '/bin/sh', :script "=> ""<<-SCRIPT set -ev REPO_ROOT="$PODS_TARGET_SRCROOT" "$REPO_ROOT/"../gradlew" -p "$REPO_ROOT" :shared:syncFramework \ -Pkotlin.native.cocoapods.target=$KOTLIN_TARGET \ -Pkotlin.native.cocoapods.configuration=$CONFIGURATION \ -Pkotlin.native.cocoapods.cflags="$OTHER_CFLAGS" \ -Pkotlin.native.cocoapods.paths.headers="$HEADER_SEARCH_PATHS" \ -Pkotlin.native.cocoapods.paths.frameworks="$FRAMEWORK_SEARCH_PATHS" SCRIPT } ]
62. droidcon EMEA - @marcoGomier CocoaPods plugin: shared.podspec https://kotlinlang.org/docs/reference/native/cocoapods.html spec.pod_target_xcconfig = { 'KOTLIN_TARGET[sdk=iphonesimulator*]' "=> 'ios_x64', 'KOTLIN_TARGET[sdk=iphoneos*]' "=> 'ios_arm', 'KOTLIN_TARGET[sdk=watchsimulator*]' "=> 'watchos_x86', 'KOTLIN_TARGET[sdk=watchos*]' "=> 'watchos_arm', 'KOTLIN_TARGET[sdk=appletvsimulator*]' "=> 'tvos_x64', 'KOTLIN_TARGET[sdk=appletvos*]' "=> 'tvos_arm64', 'KOTLIN_TARGET[sdk=macosx*]' "=> 'macos_x64' } spec.script_phases = [ { :name "=> 'Build shared', :execution_position "=> :before_compile, :shell_path "=> '/bin/sh', :script "=> ""<<-SCRIPT set -ev REPO_ROOT="$PODS_TARGET_SRCROOT" "$REPO_ROOT/"../gradlew" -p "$REPO_ROOT" :shared:syncFramework \ -Pkotlin.native.cocoapods.target=$KOTLIN_TARGET \ -Pkotlin.native.cocoapods.configuration=$CONFIGURATION \ -Pkotlin.native.cocoapods.cflags="$OTHER_CFLAGS" \ -Pkotlin.native.cocoapods.paths.headers="$HEADER_SEARCH_PATHS" \ -Pkotlin.native.cocoapods.paths.frameworks="$FRAMEWORK_SEARCH_PATHS" SCRIPT } ]
63. droidcon EMEA - @marcoGomier
64. droidcon EMEA - @marcoGomier Fat Framework
65. droidcon EMEA - @marcoGomier org.jetbrains.kotlin.gradle.tasks.FatFrameworkTask"::class
66. droidcon EMEA - @marcoGomier Custom Gradle Task: universalFrameworkDebug val libName = "HNFoundation" tasks { register("universalFrameworkDebug", org.jetbrains.kotlin.gradle.tasks.FatFrameworkTask"::class) { baseName = libName from( iosArm64().binaries.getFramework(libName, "Debug"), iosX64().binaries.getFramework(libName, "Debug") ) destinationDir = buildDir.resolve("$rootDir/"../"../hn-foundation-cocoa") group = libName description = "Create the debug framework for iOs" dependsOn("linkHNFoundationDebugFrameworkIosArm64") dependsOn("linkHNFoundationDebugFrameworkIosX64") } ""... } https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-foundation/build.gradle.kts#L100
67. droidcon EMEA - @marcoGomier Custom Gradle Task: universalFrameworkDebug val libName = "HNFoundation" tasks { register("universalFrameworkDebug", org.jetbrains.kotlin.gradle.tasks.FatFrameworkTask"::class) { baseName = libName from( iosArm64().binaries.getFramework(libName, "Debug"), iosX64().binaries.getFramework(libName, "Debug") ) destinationDir = buildDir.resolve("$rootDir/"../"../hn-foundation-cocoa") group = libName description = "Create the debug framework for iOs" dependsOn("linkHNFoundationDebugFrameworkIosArm64") dependsOn("linkHNFoundationDebugFrameworkIosX64") } ""... } https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-foundation/build.gradle.kts#L100
68. droidcon EMEA - @marcoGomier Custom Gradle Task: universalFrameworkDebug val libName = "HNFoundation" tasks { register("universalFrameworkDebug", org.jetbrains.kotlin.gradle.tasks.FatFrameworkTask"::class) { baseName = libName from( iosArm64().binaries.getFramework(libName, "Debug"), iosX64().binaries.getFramework(libName, "Debug") ) destinationDir = buildDir.resolve("$rootDir/"../"../hn-foundation-cocoa") group = libName description = "Create the debug framework for iOs" dependsOn("linkHNFoundationDebugFrameworkIosArm64") dependsOn("linkHNFoundationDebugFrameworkIosX64") } ""... } https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-foundation/build.gradle.kts#L100
69. droidcon EMEA - @marcoGomier https://github.com/prof18/hn-foundation-cocoa/ CocoaPod Repository
70. droidcon EMEA - @marcoGomier Pod"::Spec.new do |s| # ――― Spec Metadata ―――――――――――――――――――――――――――――――――――――――――――――――――――――――――― # # # These will help people to find your library, and whilst it # can feel like a chore to fill in it's definitely to your advantage. The # summary should be tweet-length, and the description more in depth. # s.name = "HNFoundation" s.version = "1.0.0" s.summary = "HNFoundation KMP library" s.homepage = "https:"//github.com/prof18/hn-foundation-cocoa" s.description = "The framework of the HNFoundation library" s.license = "UNLICENSED" s.author = { "Marco Gomiero" "=> "mg@mail.it" } s.platform = :ios, "10.0" s.ios.vendored_frameworks = 'HNFoundation.framework' # s.swift_version = "4.1" s.source = { :git "=> "git@github.com:prof18/hn-foundation-cocoa.git", :tag "=> ""#{s.version}" } s.exclude_files = "Classes/Exclude" end HNFoundation.podspec https://github.com/prof18/hn-foundation-cocoa/blob/master/HNFoundation.podspec
72. https:"//guides.cocoapods.org/making/private-cocoapods.html
73. droidcon EMEA - @marcoGomier iOs Project: Podfile # For develop releases: pod 'HNFoundation', :git "=> "git@github.com:prof18/hn-foundation-cocoa.git", :branch "=> 'develop'
74. droidcon EMEA - @marcoGomier iOs Project: Podfile # For develop releases: pod 'HNFoundation', :git "=> "git@github.com:prof18/hn-foundation-cocoa.git", :branch "=> 'develop' # For stable releases pod 'HNFoundation', :git "=> "git@github.com:prof18/hn-foundation-cocoa.git", :tag "=> '1.0.0'
75. iOs Publish Dev Task https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-foundation/build.gradle.kts#L132 register("publishDevFramework") { description = "Publish iOs framweork to the Cocoa Repo" project.exec { workingDir = File("$rootDir/"../"../hn-foundation-cocoa") commandLine("git", "checkout", "develop").standardOutput } "// Create Release Framework for Xcode dependsOn("universalFrameworkDebug") "// Replace doLast { val dir = File("$rootDir/"../"../hn-foundation-cocoa/HNFoundation.podspec") val tempFile = File("$rootDir/"../"../hn-foundation-cocoa/HNFoundation.podspec.new") val reader = dir.bufferedReader() val writer = tempFile.bufferedWriter() var currentLine: String?
76. droidcon EMEA - @marcoGomier "// Replace doLast { val dir = File("$rootDir/"../"../hn-foundation-cocoa/HNFoundation.podspec") val tempFile = File("$rootDir/"../"../hn-foundation-cocoa/HNFoundation.podspec.new") val reader = dir.bufferedReader() val writer = tempFile.bufferedWriter() var currentLine: String? while (reader.readLine().also { currLine "-> currentLine = currLine } "!= null) { if (currentLine"?.startsWith("s.version") "== true) { writer.write("s.version = \"${libVersionName}\"" + System.lineSeparator()) } else { writer.write(currentLine + System.lineSeparator()) } } writer.close() reader.close() val successful = tempFile.renameTo(dir) if (successful) { val dateFormatter = SimpleDateFormat("dd/MM/yyyy - HH:mm", Locale.getDefault())
77. droidcon EMEA - @marcoGomier } writer.close() reader.close() val successful = tempFile.renameTo(dir) if (successful) { val dateFormatter = SimpleDateFormat("dd/MM/yyyy - HH:mm", Locale.getDefault()) project.exec { workingDir = File("$rootDir/"../"../hn-foundation-cocoa") commandLine("git", "commit", "-a", "-m", "\"New dev release: ${libVersionName}-${dateFormatter.format(Date())}\"" ).standardOutput } project.exec { workingDir = File("$rootDir/"../"../hn-foundation-cocoa") commandLine("git", "push", "origin", "develop").standardOutput } } } }
78. iOs Publish Release Task https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-foundation/build.gradle.kts#L189 register("publishFramework") { description = "Publish iOs framework to the Cocoa Repo" project.exec { workingDir = File("$rootDir/"../"../hn-foundation-cocoa") commandLine("git", "checkout", "master").standardOutput } "// Create Release Framework for Xcode dependsOn("universalFrameworkRelease") "// Replace doLast { val dir = File("$rootDir/"../"../hn-foundation-cocoa/HNFoundation.podspec") val tempFile = File("$rootDir/"../"../hn-foundation-cocoa/HNFoundation.podspec.new") val reader = dir.bufferedReader() val writer = tempFile.bufferedWriter() var currentLine: String?
79. droidcon EMEA - @marcoGomier reader.close() val successful = tempFile.renameTo(dir) if (successful) { project.exec { workingDir = File("$rootDir/"../"../hn-foundation-cocoa") commandLine("git", "commit", "-a", "-m", "\"New release: ${libVersionName}\"").standardOutput } project.exec { workingDir = File("$rootDir/"../"../hn-foundation-cocoa") commandLine("git", "tag", libVersionName).standardOutput } project.exec { workingDir = File("$rootDir/"../"../hn-foundation-cocoa") commandLine("git", "push", "origin", "master", ""--tags").standardOutput } } } }
80. droidcon EMEA - @marcoGomier
81. droidcon EMEA - @marcoGomier
82. droidcon EMEA - @marcoGomier How to handle deserialization?
83. droidcon EMEA - @marcoGomier How to handle deserialization? • Probably you are using Alamofire for net handling
84. droidcon EMEA - @marcoGomier How to handle deserialization? • Probably you are using Alamofire for net handling • [De]Serialization probable handled with the Codable or other solutions like ObjectMapper
85. droidcon EMEA - @marcoGomier How to handle deserialization? • Probably you are using Alamofire for net handling • [De]Serialization probable handled with the Codable or other solutions like ObjectMapper • Need to comply to the Decodable or the Mappable protocol
86. droidcon EMEA - @marcoGomier
87. droidcon EMEA - @marcoGomier https:"//developer.apple.com/documentation/foundation/ archives_and_serialization/encoding_and_decoding_custom_types
88. droidcon EMEA - @marcoGomier
89. droidcon EMEA - @marcoGomier https:"//github.com/tristanhimmelman/ObjectMapper
90. droidcon EMEA - @marcoGomier NewsDTODecodable.swift https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-ios-client/HN%20Client/HN%20Client/data/model/NewDTODecodable.swift class NewsDTODecodable: NewsDTO, Decodable { "// ".. }
91. droidcon EMEA - @marcoGomier NewsDTODecodable.swift class NewsDTODecodable: NewsDTO, Decodable { public required init(from decoder: Decoder) throws { super.init() let container = try decoder.container(keyedBy: CodingKeys.self) author = try container.decode(String.self, forKey: .author) id = try container.decode(Int64.self, forKey: .id) score = try container.decode(Int32.self, forKey: .score) timestamp = try container.decode(Int64.self, forKey: .timestamp) title = try container.decode(String.self, forKey: .title) type = try container.decode(String.self, forKey: .type) url = try container.decode(String.self, forKey: .url) } enum CodingKeys: String, CodingKey { case author case id case score case timestamp
92. droidcon EMEA - @marcoGomier NewsDTO.kt https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-foundation/src/commonMain/kotlin/com/prof18/hn/dto/NewsDTO.kt open class NewsDTO( var author: String, var id: Long, var score: Int, var timestamp: Long, var title: String, var type: String, var url: String ): { constructor() : this( ".. ) { ".. } }
93. iOs Net Call https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-ios-client/HN%20Client/HN%20Client/ui/MainViewModel.swift let request = AF.request("http:"//192.168.0.119:8080/hn/topStories") request.responseDecodable(of: [NewsDTODecodable].self) { (response) in guard let listResponse = response.value else { print("something wrong") } "// ".. }
94. Uncaught Kotlin exception: kotlin.native.IncorrectDereferenceException: illegal attempt to access non-shared <object>@c2ddb8 from other thread
95. droidcon EMEA - @marcoGomier
96. droidcon EMEA - @marcoGomier https:"//www.youtube.com/watch?v=oxQ6e1VeH4M
97. droidcon EMEA - @marcoGomier
98. droidcon EMEA - @marcoGomier https:"//dev.to/kpgalligan/series/3739
99. droidcon EMEA - @marcoGomier
100. droidcon EMEA - @marcoGomier Freeze the object to share it between threads
101. droidcon EMEA - @marcoGomier https://github.com/touchlab/Stately
102. droidcon EMEA - @marcoGomier BaseDTO.kt https://github.com/prof18/shared-hn-android-ios-backend/blob/master/hn-foundation/src/commonMain/kotlin/com/prof18/hn/dto/BaseDTO.kt open class BaseDTO { fun makeFrozen() { freeze() } }
103. droidcon EMEA - @marcoGomier NewsDTODecodable.swift class NewsDTODecodable: NewsDTO, Decodable { public required init(from decoder: Decoder) throws { super.init() let container = try decoder.container(keyedBy: CodingKeys.self) author = try container.decode(String.self, forKey: .author) id = try container.decode(Int64.self, forKey: .id) score = try container.decode(Int32.self, forKey: .score) timestamp = try container.decode(Int64.self, forKey: .timestamp) title = try container.decode(String.self, forKey: .title) type = try container.decode(String.self, forKey: .type) url = try container.decode(String.self, forKey: .url) super.makeFrozen() } enum CodingKeys: String, CodingKey { case author case id
104. droidcon EMEA - @marcoGomier
105. droidcon EMEA @marcoGomier Conclusions
106. droidcon EMEA - @marcoGomier Faced [and resolved] difficulties • How to organise the project without a monorepo • Gradle • How to effectively distribute the iOs framework • How to handle deserialization on iOs
107. droidcon EMEA - @marcoGomier Start little
108. droidcon EMEA - @marcoGomier Start little Go bigger then
109. droidcon EMEA - @marcoGomier Start little then go bigger • We have validated the process with “little” effort • Now we can go bigger and share more “features” For example the data layer → write SQL once for all
110. Bibliography / Useful Links • https:"//www.marcogomiero.com/posts/2020/my-2cents-cross-platform/ • https:"//giansegato.com/essays/a-technical-framework-for-early-stage- startups/ • https:"//giansegato.com/essays/the-ebb-and-the-flow-of-product-development/ • https:"//www.youtube.com/watch?v=oxQ6e1VeH4M • https:"//dev.to/kpgalligan/series/3739 • https:"//blog.jetbrains.com/kotlin/2020/07/kotlin-native-memory-management- roadmap/ • https:"//dev.to/touchlab/kotlin-native-concurrency-changes-p3e • https:"//kotlinlang.org/lp/mobile/
111. droidcon EMEA Marco Gomiero Thank you! > Twitter: @marcoGomier > Github: prof18 > Website: marcogomiero.com