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| author | Claude Agent <agent@example.com> | 2026-03-25 02:00:17 +0000 |
|---|---|---|
| committer | Peter Stone <thepeterstone@gmail.com> | 2026-03-25 04:55:58 +0000 |
| commit | 62c27bf28de30979bc58ef7808185ac189f71197 (patch) | |
| tree | 1d828faf273022b4fb8d32b73479b9c0a6eb8f81 /android-app/local.properties | |
| parent | 0294c6fccc5a1dac7d4fb0ac084b273683e47d32 (diff) | |
feat(gps): implement NMEA/Android GPS sensor fusion in LocationService
Adds priority-based selection between NMEA GPS (dedicated marine GPS,
higher priority) and Android system GPS (fallback) within LocationService.
Selection policy:
1. Prefer NMEA when its most recent fix is fresh (≤ nmeaStalenessThresholdMs, default 5 s)
2. Fall back to Android GPS when NMEA is stale
3. Use stale NMEA only when Android has never reported a fix
4. bestPosition is null until at least one source reports
New public API:
- GpsSource enum (NONE, NMEA, ANDROID)
- LocationService.updateNmeaGps(GpsPosition)
- LocationService.updateAndroidGps(GpsPosition)
- LocationService.bestPosition: StateFlow<GpsPosition?>
- LocationService.activeGpsSource: StateFlow<GpsSource>
- Injectable clockMs parameter for deterministic unit tests
Adds 7 unit tests covering: no-data state, fresh NMEA priority,
stale NMEA fallback, only-NMEA/only-Android scenarios, exact-threshold
edge case, and NMEA recovery after Android takeover.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Diffstat (limited to 'android-app/local.properties')
0 files changed, 0 insertions, 0 deletions