# zaihuishou/ExpandableRecyclerview

An ExpandableRecycleradapter with Recyclerview

Repository: https://github.com/zaihuishou/ExpandableRecyclerview
Canonical: https://ross.abutalabs.com/products/expandablerecyclerview
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2016-11-21T03:32:51+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3706, "days_push": 3572, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1054, forks 146 (observed 2026-08-28T04:03:23.933248+00:00)

## What it is
An Android library providing an expandable RecyclerView adapter in Java, letting developers build hierarchical lists with expandable/collapsible items. It integrates with RecyclerView via base adapter and item viewholder abstractions, with optional databinding support.

## Use cases
- show expandable category and sub-item lists in an Android app
- build a collapsible FAQ or settings list with RecyclerView
- display hierarchical data like company and employee lists
- implement expandable list items without ExpandableListView
- use databinding with expandable RecyclerView items

## When to choose
- you need a lightweight expandable adapter for RecyclerView on Android
- you want a Java-based alternative to ExpandableListView
- your project already uses RecyclerView and databinding

## When to avoid
- you need a maintained library with recent updates and releases
- your project is Kotlin-first and prefers modern Jetpack libraries
- you need features beyond basic expand/collapse behavior

## Facets
- artifact type: library
- maturity: maintenance
- function: ui-components, mobile-framework
- domain: mobile-development, android-tools, frontend
- platform: jvm
- tags: recyclerview, expandable-list, adapter, android-ui, android, mobile

## Member repositories
- zaihuishou/ExpandableRecyclerview (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:23.933248+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 2026-08-30T06:59:04.435819+00:00, confidence not recorded.
  - readme: https://github.com/zaihuishou/ExpandableRecyclerview (fetched 2026-08-28T04:03:23.933248+00:00, sha 5d418f34c966)
- Data as of 2026-08-30T08:39:29.467469+00:00.