# JakeWharton/u2020

A sample Android app which showcases advanced usage of Dagger among other open source libraries.

Repository: https://github.com/JakeWharton/u2020
Canonical: https://ross.abutalabs.com/products/u2020
Homepage: https://www.youtube.com/watch?v=0XHx9jtxIxU
Language: Java
License: Apache-2.0
License Family: permissive
Last push: 2023-05-28T12:22:30+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": 4675, "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 5619, forks 907 (observed 2026-08-28T04:09:23.070535+00:00)

## What it is
U+2020 is a sample Android app by Jake Wharton demonstrating advanced Dagger dependency injection usage alongside other open-source libraries. Its debug build variant showcases patterns like a debug drawer, endpoint switching, and in-memory mock mode for testing.

## Use cases
- learn advanced Dagger dependency injection patterns in Android
- see how to structure debug vs release build variants
- implement a debug drawer with developer options in an Android app
- set up mock mode to simulate a backend server in-memory
- find a reference architecture for a modern Android app
- learn how to override modules for debug builds

## When to choose
- you want a real-world reference for Dagger module organization and overrides
- you are building Android debug tooling like a developer drawer or mock mode
- you want to study build-type-specific code in Android Gradle projects

## When to avoid
- you need a production-ready app or maintained library to depend on
- you want current best practices - the codebase predates modern Android stacks like Kotlin, Hilt, and Compose
- you need a tutorial with step-by-step guidance rather than example code

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: mocking, developer-tools, ui-components
- domain: android-tools, mobile-development, developer-tools, tutorials
- platform: jvm
- tags: dagger, sample-app, debug-drawer, android-debugging, dependency-injection, mock-mode, build-types, android, mobile

## Member repositories
- JakeWharton/u2020 (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:23.070535+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 2026-08-29T17:55:23.575692+00:00, confidence not recorded.
  - readme: https://github.com/JakeWharton/u2020 (fetched 2026-08-28T04:09:23.070535+00:00, sha d49f7518d9a7)
  - homepage: https://www.youtube.com/watch?v=0XHx9jtxIxU (fetched 2026-08-29T08:50:03.162772+00:00, sha 44136fa355b3)
- Data as of 2026-08-30T08:39:29.467469+00:00.