Doppl Code Sharing

on YouTube ↗34m

" summary

Doppel is a build tool and library set that uses J2ObjC to convert Java to Objective‑C so business logic, Room DB, Retrofit, RxJava, Dagger and Android architecture components run on iOS while the 100% native Android side stays unchanged. The team ports Android primitives (SQLite, shared preferences, Looper/Handler) to iOS, ships a Joy‑Con sample that compiles and performs well, works around generics by returning concrete types to Swift, and advertises a technical preview with production clients.

AI-written summary · about

" chapters (8)

1. 0:00Introduction to code sharing
2. 5:57What is Doppel
3. 12:15Sharing architecture not UI
4. 17:18Developer efficiency and platform tax
5. 21:56Business risks and sharing
6. 26:10Kotlin Native and future solutions
7. 31:48Alternatives and final thoughts
8. 34:15Q&A

" related talks

• 43mDoppl Code SharingKevin Galligan · Android Summit 2017
• 40mKotlin Multiplatform. Make your Android App Cross-PlatformAnna Zharkova · Android Worldwide July 2023
• 36mBest Practices for Developing Amazing Kotlin Multiplatform AppsPamela Hill · Android Worldwide October 2023
• 28mThe ever increasing convergence of native iOS and Android mobile developmentJohn O'Reilly · droidcon London 2022
• 36mEntering the World of Other Platforms Through KMP GateSeyed Mohammad Reza Jafari · droidcon Italy 2021
• 25mKotlin Multiplatform Mobile in production: key takeaways from developing two cross-platform appsLena Stepanova · droidcon San Francisco 2022
• 41mSharing and Separation — Design Guidelines for Compose Multiplatform Production Adoptionnaberyo, Kenta Enomoto · DroidKaigi 2025
• 25mThe ever increasing convergence of native Android and iOS developmentJohn O'Reilly · droidcon Berlin 2022