TrackRecordingManager: do not store altitude changes twice (previous …

…TrackPoint's storage was delayed).

Fixes #969.

src/main/java/de/dennisguse/opentracks/content/data/TrackPoint.java

@@ -349,9 +349,15 @@ public class TrackPoint {
         return this;
     }
 
-    public TrackPoint minusSensorDistance(@NonNull TrackPoint lastTrackPoint) {
+    public TrackPoint minusCumulativeSensorData(@NonNull TrackPoint lastTrackPoint) {
         if (hasSensorDistance() && lastTrackPoint.hasSensorDistance()) {
-            setSensorDistance(getSensorDistance().minus(lastTrackPoint.getSensorDistance()));
+            sensorDistance = sensorDistance.minus(lastTrackPoint.getSensorDistance());
+        }
+        if (hasAltitudeGain() && lastTrackPoint.hasAltitudeGain()) {
+            altitudeGain_m -= lastTrackPoint.altitudeGain_m;
+        }
+        if (hasAltitudeLoss() && lastTrackPoint.hasAltitudeLoss()) {
+            altitudeLoss_m -= lastTrackPoint.altitudeLoss_m;
         }
         return this;
     }

src/main/java/de/dennisguse/opentracks/services/TrackRecordingManager.java

@@ -208,7 +208,7 @@ class TrackRecordingManager {
             } else {
                 insertTrackPointHelper(trackId, lastTrackPoint);
                 // Remove the sensorDistance from trackPoint that is already going  be stored with lastTrackPoint.
-                trackPoint.minusSensorDistance(lastTrackPoint);
+                trackPoint.minusCumulativeSensorData(lastTrackPoint);
             }
             lastTrackPoint = null;
         }

src/main/java/de/dennisguse/opentracks/services/sensors/AltitudeSumManager.java

@@ -70,6 +70,19 @@ public class AltitudeSumManager implements SensorEventListener {
         return isConnected ? altitudeGain_m : null;
     }
 
+
+    @VisibleForTesting
+    public void addAltitudeGain_m(float altitudeGain_m) {
+        this.altitudeGain_m = this.altitudeGain_m == null ? 0f : this.altitudeGain_m;
+        this.altitudeGain_m += altitudeGain_m ;
+    }
+
+    @VisibleForTesting
+    public void addAltitudeLoss_m(Float altitudeLoss_m) {
+        this.altitudeLoss_m = this.altitudeLoss_m == null ? 0f : this.altitudeLoss_m;
+        this.altitudeLoss_m += altitudeLoss_m ;
+    }
+
     public @Nullable
     Float getAltitudeLoss_m() {
         return isConnected ? altitudeLoss_m : null;

src/main/java/de/dennisguse/opentracks/util/PressureSensorUtils.java

@@ -77,7 +77,8 @@ public class PressureSensorUtils {
      * https://de.wikipedia.org/wiki/Barometrische_H%C3%B6henformel#Internationale_H%C3%B6henformel
      * {\color{White} p(h)} = p_0 \cdot \left( 1 - \frac{0{,}0065 \frac{\mathrm K}{\mathrm m} \cdot h}{T_0\ } \right)^{5{,}255}
      */
-    private static float getBarometricPressure(float altitude_m) {
+    @VisibleForTesting
+    public static float getBarometricPressure(float altitude_m) {
         return (float) (p0 * Math.pow(1.0 - 0.0065 * altitude_m / 288.15, 5.255f));
     }
 }