# kikoso/android-stackblur

Android StackBlur is a library that can perform a blurry effect on a Bitmap based on a gradient or radius, and return the result. The library is based on the code of Mario Klingemann.

Repository: https://github.com/kikoso/android-stackblur
Canonical: https://ross.abutalabs.com/products/android-stackblur
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2023-05-28T15:32:32+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": 4766, "days_push": 1193, "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 3566, forks 648 (observed 2026-08-28T04:08:09.949414+00:00)

## What it is
An Android library that applies a StackBlur (gaussian-like) blur effect to Bitmaps with configurable radius or gradient. It offers Java, NDK native, and RenderScript processing backends, with the native option being 25-30x faster.

## Use cases
- blur a background image behind a dialog in Android
- apply gaussian blur to a bitmap with a given radius
- create frosted glass effect on Android
- blur images fast using native code on Android
- apply gradient blur effect to photos in an app

## When to choose
- you need bitmap blurring on Android with broad device compatibility
- you want a choice of Java, NDK, or RenderScript blur implementations for performance tuning

## When to avoid
- you need blur on platforms other than Android
- you want a modern, actively developed image processing pipeline with Maven Central support

## Facets
- artifact type: library
- maturity: maintenance
- function: image-processing, graphics
- domain: image-processing, mobile-development, android-tools
- platform: jvm
- tags: blur-effect, bitmap, stackblur, renderscript, android-ndk, gaussian-blur, android, mobile

## Member repositories
- kikoso/android-stackblur (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:09.949414+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 2026-08-29T18:34:10.191745+00:00, confidence not recorded.
  - readme: https://github.com/kikoso/android-stackblur (fetched 2026-08-28T04:08:09.949414+00:00, sha 8923d2ee9db5)
- Data as of 2026-08-30T08:39:29.467469+00:00.