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aartikov/Alligator

Alligator is an Android navigation library that manages screen transitions, state, and animations through a declarative, flow-based architecture. It provides a type-safe API for handling navigation commands, screen results, and shared element transitions, with a compiler plugin that generates navigation factories from annotations. The codebase has been modernized to Kotlin and AndroidX, offering samples that demonstrate various navigation patterns and animation capabilities.

47.6

Weak · 4 August 2026

6k

lines of production code

Kotlin

with Java

1

bus factor · 7 authors in all

2

measurements over time

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How it got here

2017 · Kotlin migration and sample expansion

This period focused on modernizing the Alligator library and its associated samples by migrating Java code to Kotlin and updating to AndroidX. The team expanded the project's utility by adding new sample applications for shared element transitions and various navigation methods, while also refactoring the core navigation and screen-switching architectures to support screen results.

19 changes

2018–2023 · Kotlin migration and modernization

The Alligator library underwent a comprehensive migration from Java to Kotlin, updating core navigation logic, exception handling, and helper classes. This period also introduced new features, including a default screen result converter and sample applications demonstrating flow-based navigation and screen switching.

10 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 4 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 0211fc0c22 — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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