Temporary TrackStatistics should also contain gain/loss from barometric sensor.

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

@@ -778,6 +778,8 @@ public class TrackRecordingService extends Service implements HandlerServer.Hand
             tmpLastTrackPoint.setLongitude(lastTrackPoint.getLongitude());
             tmpLastTrackPoint.setLatitude(lastTrackPoint.getLatitude());
         }
+        tmpLastTrackPoint.setAltitudeGain(getAltitudeGain_m());
+        tmpLastTrackPoint.setAltitudeLoss(getAltitudeLoss_m());
 
         SensorDataSet sensorDataSet = fillWithSensorDataSet(tmpLastTrackPoint);
 

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

@@ -100,12 +100,13 @@ public class AltitudeSumManager implements SensorEventListener {
             return;
         }
 
+        altitudeGain_m = altitudeGain_m != null ? altitudeGain_m : 0;
+        altitudeLoss_m = altitudeLoss_m != null ? altitudeLoss_m : 0;
+
         PressureSensorUtils.AltitudeChange altitudeChange = PressureSensorUtils.computeChangesWithSmoothing_m(lastAcceptedPressureValue_hPa, lastSeenSensorValue_hPa, value_hPa);
         if (altitudeChange != null) {
-            altitudeGain_m = altitudeGain_m != null ? altitudeGain_m : 0;
-            altitudeGain_m = altitudeChange.getAltitudeGain_m();
+            altitudeGain_m += altitudeChange.getAltitudeGain_m();
 
-            altitudeLoss_m = altitudeLoss_m != null ? altitudeLoss_m : 0;
             altitudeLoss_m += altitudeChange.getAltitudeLoss_m();
 
             lastAcceptedPressureValue_hPa = altitudeChange.getCurrentSensorValue_hPa();

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

@@ -2,6 +2,8 @@ package de.dennisguse.opentracks.util;
 
 import android.hardware.SensorManager;
 
+import androidx.annotation.VisibleForTesting;
+
 public class PressureSensorUtils {
 
     //Everything above is considered a meaningful change in altitude.
@@ -9,6 +11,8 @@ public class PressureSensorUtils {
 
     private static final float EXPONENTIAL_SMOOTHING = 0.3f;
 
+    private static final float p0 = SensorManager.PRESSURE_STANDARD_ATMOSPHERE;
+
     private PressureSensorUtils() {
     }
 
@@ -46,17 +50,13 @@ public class PressureSensorUtils {
     public static AltitudeChange computeChangesWithSmoothing_m(float lastAcceptedSensorValue_hPa, float lastSeenSensorValue_hPa, float currentSensorValue_hPa) {
         float nextSensorValue_hPa = EXPONENTIAL_SMOOTHING * currentSensorValue_hPa + (1 - EXPONENTIAL_SMOOTHING) * lastSeenSensorValue_hPa;
 
-        return computeChanges_m(lastAcceptedSensorValue_hPa, nextSensorValue_hPa);
+        return computeChanges(lastAcceptedSensorValue_hPa, nextSensorValue_hPa);
     }
 
-    /**
-     * Computes the altitude gain and altitude loss.
-     *
-     * @return null if no meaningful altitudeC change occurred.
-     */
-    public static AltitudeChange computeChanges_m(float lastAcceptedSensorValue_hPa, float currentSensorValue_hPa) {
-        float lastSensorValue_m = SensorManager.getAltitude(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, lastAcceptedSensorValue_hPa);
-        float currentSensorValue_m = SensorManager.getAltitude(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, currentSensorValue_hPa);
+    @VisibleForTesting
+    public static AltitudeChange computeChanges(float lastAcceptedSensorValue_hPa, float currentSensorValue_hPa) {
+        float lastSensorValue_m = SensorManager.getAltitude(p0, lastAcceptedSensorValue_hPa);
+        float currentSensorValue_m = SensorManager.getAltitude(p0, currentSensorValue_hPa);
 
         float altitudeChange_m = currentSensorValue_m - lastSensorValue_m;
         if (Math.abs(altitudeChange_m) < ALTITUDE_CHANGE_DIFF_M) {
@@ -66,9 +66,9 @@ public class PressureSensorUtils {
         // Limit altitudeC change by ALTITUDE_CHANGE_DIFF and computes pressure value accordingly.
         AltitudeChange altitudeChange = new AltitudeChange(currentSensorValue_hPa, altitudeChange_m);
         if (altitudeChange.getAltitudeChange_m() > 0) {
-            return new AltitudeChange(getBarometricPressure(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, lastSensorValue_m + ALTITUDE_CHANGE_DIFF_M), ALTITUDE_CHANGE_DIFF_M);
+            return new AltitudeChange(getBarometricPressure(lastSensorValue_m + ALTITUDE_CHANGE_DIFF_M), ALTITUDE_CHANGE_DIFF_M);
         } else {
-            return new AltitudeChange(getBarometricPressure(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, lastSensorValue_m - ALTITUDE_CHANGE_DIFF_M), -1 * ALTITUDE_CHANGE_DIFF_M);
+            return new AltitudeChange(getBarometricPressure(lastSensorValue_m - ALTITUDE_CHANGE_DIFF_M), -1 * ALTITUDE_CHANGE_DIFF_M);
         }
     }
 
@@ -77,7 +77,7 @@ 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 p0, float altitude_m) {
+    private static float getBarometricPressure(float altitude_m) {
         return (float) (p0 * Math.pow(1.0 - 0.0065 * altitude_m / 288.15, 5.255f));
     }
 }

src/main/java/de/dennisguse/opentracks/viewmodels/IntervalStatistics.java

@@ -163,10 +163,8 @@ public class IntervalStatistics {
             time = time.plus(trackStatistics.getTotalTime());
             gain_m = trackStatistics.hasTotalAltitudeGain() ? trackStatistics.getTotalAltitudeGain() : gain_m;
             loss_m = trackStatistics.hasTotalAltitudeLoss() ? trackStatistics.getTotalAltitudeLoss() : loss_m;
-            if (gain_m != null && lastTrackPoint != null && lastTrackPoint.hasAltitudeGain()) {
+            if (hasGain() && lastTrackPoint != null && lastTrackPoint.hasAltitudeGain()) {
                 gain_m = gain_m - lastTrackPoint.getAltitudeGain();
-            }
-            if (loss_m != null && lastTrackPoint != null && lastTrackPoint.hasAltitudeLoss()) {
                 loss_m = loss_m - lastTrackPoint.getAltitudeLoss();
             }
         }