Kotlin Multiplatform! - Speaker Deck

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Architecting a Kotlin Multiplatform Divya Jain

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Hello! I am Divya Jain Mobile App Developer You can ﬁnd me at @divyajain2405 2

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“Single codebase, Shared business logic for Android & IOS, through pure Kotlin 3 Common JVM JS Native Note: Cross platform only for shared business logic, UI is still native in Kotlin/Swift etc

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KMM Project Structure ⬡ Shared Module ⬡ Android Application ⬡ IOS Application 4

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Expect “Expected declaration” in the common module for functions, classes, enums , properties etc. Expect/Actual mechanism Actual “Actual declaration” in the platform module corresponding to the expected one. 5 expect common Actual IOS native declaration Actual Android native declaration

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commonMain ios android

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7 KMM Plugin

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8 New KMP Project Android Studio: v4.2

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KMM-Books An app using KMM which displays a list of Books with name, brief description & author. 10

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15 https://github.com/djain2405/kotlin-multiplatform-booklist

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Ktor for Networking Open source framework to build connected applications (Web, Http services, mobile, browser) Asynchronous multi platform client 16

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17 https://github.com/ktorio/ktor-samples

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Clean Architecture with KMM 18 Domain Models DataSource Cache SQL Delight Network Ktor Use Cases & user interaction handlers Shared module - kotlin Platform Speciﬁc UI Presentation Layer

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Beneﬁts of KMM Signiﬁcant Savings Faster Development time, cause using Kotlin for Mobile & web, we are writing the business logic code only once. Fewer Bugs & testable Allows developers to create clean code, shared business logic is unit testable & bugs are less and caught much early on. Almost a Native experience The UI is still built natively, it’s just shared logic. Utilize power of each platform without the overhead. Flexibility & platform consistent user experience. 19

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Kotlin Multiplatform holds all the key promises and possibilities similar to Kotlin & emerges as a well-equipped solution for cross-platform app development projects. 20

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Thank You! @divyajain2405 https://github.com/djain2405 21