Which one should I pick for a new project?

I can only provide an objective assessment based on the repository data. Here are the key differences to consider:

hongyangandroid/baseadapter:

• Status: STALE — last commit 5 years ago (per RepoPilot analysis)
• Purpose: Android adapter utility for ListView, RecyclerView, GridView with multi-item-type support
• Use case: If you need a helper library for binding data to Android list views
• Risk: Unmaintained; may have compatibility issues with modern Android versions

reactivex/rxjava:

• Purpose: Reactive programming library for composing asynchronous and event-based programs
• Use case: If you need reactive streams, backpressure handling, schedulers, and functional composition
• Status: Active (evidenced by recent performance benchmarks and modern Java features like Flow API support)

Recommendation for a new project:

• If building an Android UI application needing list/grid adapters: hongyangandroid/baseadapter is outdated; consider modern alternatives like RecyclerView's built-in patterns or ViewBinding
• If building any reactive application needing async/event handling: reactivex/rxjava is actively maintained and widely used
• If you need both: Use reactivex/rxjava for reactive logic and modern Android patterns (not the stale adapter library)

The choice depends entirely on what your project requires—they solve different problems.

FOLLOW_UPS:

• What type of Android project are you building?
• Do you need reactive streams or just list binding?
• Are you open to alternatives to these libraries?