Add fix for GPS rollover bug, closes #78 (b4ce1610) · Commits · Android-smartphones / Ulogger Android

app/src/main/java/net/fabiszewski/ulogger/LocationHelper.java

+21 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,13 @@ class LocationHelper {
		private final Context context;
		private final LocationManager locationManager;

		// millis 1999-08-21T23:59:42+00:00
		private static final long FIRST_ROLLOVER_TIMESTAMP = 935279982000L;
		// millis 2019-04-06T23:59:42+00:00
		private static final long SECOND_ROLLOVER_TIMESTAMP = 1554595182000L;
		// 1024 weeks in milliseconds
		private static final long ROLLOVER_MILLIS = 1024 * 7 * 24 * 60 * 60 * 1000L;

		private boolean liveSync = false;
		private int maxAccuracy;
		private float minDistance;
		@@ -249,6 +256,20 @@ class LocationHelper {
		return liveSync;
		}


		/**
		* Fix GPS week count rollover bug if needed
		* https://galileognss.eu/gps-week-number-rollover-april-6-2019/
		* @param location Location
		*/
		static void handleRolloverBug(Location location) {
		long gpsTime = location.getTime();
		if (gpsTime > FIRST_ROLLOVER_TIMESTAMP && gpsTime < SECOND_ROLLOVER_TIMESTAMP) {
		if (Logger.DEBUG) { Log.d(TAG, "[Fixing GPS rollover bug: " + gpsTime + "]"); }
		location.setTime(gpsTime + ROLLOVER_MILLIS);
		}
		}

		/**
		* Logger exceptions
		*/

+2 −0

Original line number	Diff line number	Diff line
		@@ -300,6 +300,8 @@ public class LoggerService extends Service {
		public void onLocationChanged(Location location) {
		if (Logger.DEBUG) { Log.d(TAG, "[location changed: " + location + "]"); }

		LocationHelper.handleRolloverBug(location);

		if (meetsCriteria(location)) {
		lastLocation = location;
		DbAccess.writeLocation(LoggerService.this, location);