# google/agera

Reactive Programming for Android

Repository: https://github.com/google/agera
Canonical: https://ross.abutalabs.com/products/agera
Language: Java
License: Apache-2.0
License Family: permissive
Topics: agera, android, reactive
Archived: true
Last push: 2022-01-13T14:58:57+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3912, "days_push": 1693, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7127, forks 626 (observed 2026-08-28T04:09:56.095466+00:00)

## What it is
Agera is a set of Java classes and interfaces from Google for writing functional, asynchronous, and reactive applications on Android, requiring Android SDK 9+. It includes optional experimental extension libraries for content providers, SQLite databases, HTTP connections, and RecyclerView integration.

## Use cases
- build reactive Android apps with observable data flows
- handle asynchronous event streams in Android Java code
- bind RecyclerView adapters to reactive data sources
- reactively query SQLite databases on Android
- replace RxJava with a lightweight Google-maintained alternative
- wire up SharedPreferences and BroadcastReceivers reactively

## When to choose
- you maintain an existing Android codebase already using Agera
- you want a small, Google-authored reactive library for Java-based Android apps
- you need reactive primitives without the full RxJava dependency footprint

## When to avoid
- starting a new Android project - prefer Kotlin coroutines/Flow or RxJava
- you need an actively developed library with recent releases and community support
- your project uses Kotlin idioms rather than Java
- you need broad third-party ecosystem support like Retrofit adapters

## Facets
- artifact type: library
- maturity: maintenance
- function: concurrency, state-management, developer-tools
- domain: mobile-development, android-tools, developer-tools
- platform: jvm
- tags: reactive-programming, functional-reactive, asynchronous, observables, java, android-sdk, android, mobile

## Member repositories
- google/agera (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:56.095466+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:40:04.226016+00:00, confidence not recorded.
  - readme: https://github.com/google/agera (fetched 2026-08-28T04:09:56.095466+00:00, sha 73b62344d2f5)
- Data as of 2026-08-30T08:39:29.467469+00:00.