Doppl

on YouTube ↗36m

" summary

Uses J2ObjC + Gradle plugin to convert Java into Objective‑C and produce Xcode‑friendly frameworks, implements key Android APIs on iOS (Room, SharedPreferences, Looper/Handler) and provides testing and mock generation. Several libraries are forked or adjusted — e.g. Retrofit -> NSURLSession swap for SSL — and Room is usable on iOS after about Room working on iOS in 90 minutes. The Droidcon iOS app “Sad Puppy” builds and runs, runtime overhead is ~15MB and DB benchmarks often favor iPhones.

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" chapters (7)

1. 0:00Introduction to Doppel
2. 4:45What Doppel adds to J2OBJC
3. 10:27Why code sharing matters
4. 17:09Business case for Doppel
5. 21:03Live coding demo
6. 25:18Current state and future
7. 33:46Long-term platform convergence