- Use repeatOnLifecycle(STARTED) for location updates so GPS stops
when Activity is paused (battery conservation)
- Pair enableMyLocation/disableMyLocation with onResume/onPause
- Add low-pass filter for accelerometer+magnetometer compass fallback
to reduce arrow jitter
- Detect missing compass sensors and show warning instead of frozen
arrow
- Monitor compass accuracy via onAccuracyChanged and indicate
degraded readings
- Show permission rationale dialog using existing i18n strings
- Guide user to Settings when location permission is permanently
denied
- Check cacheMapArea return value and show banner on failure
- Add error handling around shelter Flow and location Flow collection
- Add contentDescription to direction arrow views for screen readers
- Use safe casts for system services (as? instead of as)
- Use explicit dark theme parent (Theme.Material3.Dark.NoActionBar)
instead of DayNight with hardcoded dark colors
- Add error_no_compass and direction_arrow_description strings in
en/nb/nn
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- 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>
Remove accidentally committed node_modules/ and dist/ directories,
and add .gitignore to prevent them from being tracked.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Vite + TypeScript PWA that mirrors the Android app's core features:
- Pre-processed shelter data (build-time UTM33N→WGS84 conversion)
- Leaflet map with shelter markers, user location, and offline tiles
- Canvas compass arrow (ported from DirectionArrowView.kt)
- IndexedDB shelter cache with 7-day staleness check
- Service worker with CacheFirst tiles and precached app shell
- i18n for en, nb, nn (ported from Android strings.xml)
- iOS/Android compass handling with low-pass filter
- Respects user map interaction (no auto-snap on pan/zoom)
- Build revision cache-breaker for reliable SW updates
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Declare supported locales (en, nb, nn) via localeConfig so users can
pick the app language from system settings without changing their
device locale. Accessed via long-press → App Info → Language.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Rework selection model so any shelter marker can be tapped to select,
not just the nearest three in the bottom sheet list
- Highlight selected shelter with a distinct amber marker icon
- Track user map interaction (pan/zoom) to prevent auto-recentering
- Add reset navigation FAB to re-fit map to user + selected shelter
- Add offline map cache prompt (OK/Skip) with warning banner and retry
- Rewrite MapCacheManager to use passive tile caching via map panning
- Respect system status bar with fitsSystemWindows
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>
