Something old, something new: Adding Jetpack Compose to a large open source Android app
summary
Adds Jetpack Compose into Habitica, a large open‑source Android app with 26 activities and 33 fragments, facing tight Kotlin/compiler version coupling that breaks builds until aligned, and a theme mess of 27 custom colors and 82 styles that forces using composition locals or a custom theme. Chooses a design‑system module for reusable components, implements a composable inside a RecyclerView view holder, makes expansion animation trivial with animateContentSize, but tests don’t compile and no PR is submitted.
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chapters (14)
- 0:00Introduction to Compose
- 5:01Understanding Compose architecture
- 7:50Researching Compose integration
- 10:17Overcoming build errors
- 12:02Handling themes and colors
- 17:23Organizing composables in codebase
- 19:08Converting whole screens to Compose
- 20:31Building reusable components
- 23:17Integrating Compose with RecyclerView
- 26:29Adding animations in Compose
- 27:54Testing and PR considerations
- 30:20Pros and cons of adding Compose
- 33:09Lessons learned from the journey
- 35:35Future plans for Compose
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