# nikhilpanju/FabFilter

Android app to showcase complex UI/Animations with and without MotionLayout

Repository: https://github.com/nikhilpanju/FabFilter
Canonical: https://ross.abutalabs.com/products/fabfilter
Homepage: https://medium.com/@nikhilpanju22/complex-ui-animation-on-android-8f7a46f4aec4?sk=f1fab1861a655b042ff5e9c305a0e012
Language: Kotlin
License Family: other
Topics: android, android-animation, kotlin, ux
Last push: 2022-03-01T05:59:01+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2472, "days_push": 1646, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1686, forks 217 (observed 2026-08-28T04:05:22.151813+00:00)

## What it is
An open-source Android demo app showcasing complex UI animations implemented both with MotionLayout and with plain Kotlin animation fundamentals. It serves as a companion to tutorial articles comparing the two approaches.

## Use cases
- learn how to build complex multi-step animations on Android
- compare MotionLayout vs ValueAnimator-based animation implementations
- see how to animate RecyclerView item expand/collapse
- implement toolbar scroll animations with CoordinatorLayout Behavior
- find reference code for filter UI animations in Kotlin

## When to choose
- you are an Android developer learning advanced UI animation techniques
- you want side-by-side examples of MotionLayout and programmatic animations
- you need reference code for complex expand/collapse or scroll-driven animations

## When to avoid
- you need a production-ready animation library to drop into your app
- you are not developing for Android
- you need actively maintained code with a license for commercial reuse

## Facets
- artifact type: application
- maturity: maintenance
- function: animation, ui-components, mobile-framework
- domain: mobile-development, frontend, tutorials, education
- platform: jvm
- tags: motionlayout, android-animations, sample-app, kotlin, ui-showcase, learning-demo, android, mobile

## Member repositories
- nikhilpanju/FabFilter (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:22.151813+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 2026-08-30T03:38:59.427030+00:00, confidence not recorded.
  - readme: https://github.com/nikhilpanju/FabFilter (fetched 2026-08-28T04:05:22.151813+00:00, sha 5b0a2521e0d1)
  - homepage: https://medium.com/@nikhilpanju22/complex-ui-animation-on-android-8f7a46f4aec4?sk=f1fab1861a655b042ff5e9c305a0e012 (fetched 2026-08-29T11:13:48.180045+00:00, sha 8067feca3d42)
- Data as of 2026-08-30T08:39:29.467469+00:00.