# johnnylambada/WorldMap

Android Scrolling Background Bitmap Example

Repository: https://github.com/johnnylambada/WorldMap
Canonical: https://ross.abutalabs.com/products/worldmap
Language: Java
License Family: other
Last push: 2023-12-10T05:46:50+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": 5258, "days_push": 997, "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 1149, forks 250 (observed 2026-08-28T04:03:46.307356+00:00)

## What it is
A simple Android example app that displays a very large world map bitmap and lets users scroll around it. It demonstrates using BitmapRegionDecoder to decode only the visible portion of a bitmap too large to fit in memory.

## Use cases
- display a huge image on android without running out of memory
- learn how to use bitmapregiondecoder
- implement a scrollable background image in an android app
- pan around a large map on mobile
- android example for decoding partial bitmaps

## When to choose
- you need a reference implementation for scrolling large bitmaps on Android
- you want to learn BitmapRegionDecoder usage in Java

## When to avoid
- you need a full-featured map application with zoom and tiles
- you need a maintained library with a license and active development

## Facets
- artifact type: application
- maturity: maintenance
- function: image-processing, gui
- domain: mobile-development, graphics
- platform: jvm
- tags: bitmap-region-decoder, scrolling-background, sample-app, large-bitmap, android

## Member repositories
- johnnylambada/WorldMap (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:46.307356+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 2026-08-30T06:33:45.175944+00:00, confidence not recorded.
  - readme: https://github.com/johnnylambada/WorldMap (fetched 2026-08-28T04:03:46.307356+00:00, sha 0c28d9aa6365)
- Data as of 2026-08-30T08:39:29.467469+00:00.