# takahirom/PreLollipopTransition

Simple tool which help you to implement activity and fragment transition for pre-Lollipop devices.

Repository: https://github.com/takahirom/PreLollipopTransition
Canonical: https://ross.abutalabs.com/products/prelollipoptransition
Language: Java
License Family: other
Last push: 2017-04-29T09:59:12+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4179, "days_push": 3413, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1290, forks 223 (observed 2026-08-28T04:04:15.464056+00:00)

## What it is
A small Android library that backports Lollipop-style activity and fragment transitions to devices running Android API 14+. It lets developers launch shared-element-like transitions between screens with a few lines of Java code.

## Use cases
- add activity transitions on pre-Lollipop Android devices
- implement shared element animation between activities
- animate fragment transitions on older Android versions
- add exit animations when pressing back
- use transitions with startActivityForResult

## When to choose
- you maintain a legacy Android app supporting API 14+ devices without Lollipop transition APIs
- you want a minimal Java library for activity/fragment transition backporting

## When to avoid
- your minSdkVersion is 21 (Lollipop) or higher, since the platform provides transitions natively
- you are starting a new project, as the library is unmaintained with no license and last released in 2017
- you prefer Kotlin-first or Jetpack-based transition solutions

## Facets
- artifact type: library
- maturity: abandoned
- function: animation, ui-components, mobile-framework
- domain: mobile-development, android-tools
- platform: jvm
- tags: android, activity-transition, fragment-transition, pre-lollipop, backport

## Member repositories
- takahirom/PreLollipopTransition (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:15.464056+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 2026-08-30T04:55:40.835695+00:00, confidence not recorded.
  - readme: https://github.com/takahirom/PreLollipopTransition (fetched 2026-08-28T04:04:15.464056+00:00, sha 9ff17e44926a)
- Data as of 2026-08-30T08:39:29.467469+00:00.