- Wrap deleteAll+insertAll in Room transaction to prevent data loss
on crash during refresh
- Add CancellationException rethrow in ShelterRepository and
MapCacheManager to preserve structured concurrency
- Close OkHttp response body on error paths (response.use{})
- Add ZIP bomb protection (10MB cap) in GeoJSON parser
- Add per-feature error handling — skip malformed records instead of
losing all shelters
- Validate coordinates within Norway's bounding box
- Enforce HTTPS-only via network_security_config (remove cleartext
allowance for tile.openstreetmap.org)
- Disable android:allowBackup to prevent DB extraction via ADB
- Strip Log.v/d/i in release builds via ProGuard to prevent location
data leakage
- Restore map position in MapCacheManager.finally block on
cancellation
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Android app (Kotlin) that locates the nearest public shelter (tilfluktsrom)
in Norway. Designed for offline-first emergency use.
Features:
- Downloads and caches all 556 Norwegian shelter locations from Geonorge
- GPS-based nearest shelter finding with distance and bearing
- OSMDroid map with offline tile caching for surroundings
- Large directional compass arrow pointing to selected shelter
- Compass sensor integration for real-time direction updates
- Shows 3 nearest shelters with distance, capacity, and address
- Toggle between map view and compass/arrow view
- Auto-caches map tiles on first launch for offline use
- Weekly background data refresh with manual force-update
- i18n: Norwegian Bokmål, Nynorsk, and English
Technical:
- EPSG:25833 (UTM33N) → WGS84 coordinate conversion
- Haversine distance and bearing calculations
- Room database for shelter persistence
- Fused Location Provider for precise GPS
- Sensor fusion (rotation vector with accel+mag fallback) for compass
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
