Added elevation loss via barometer (like elevation gain). Fixes #547.

src/androidTest/java/de/dennisguse/opentracks/content/DescriptionGeneratorTest.java

@@ -64,6 +64,7 @@ public class DescriptionGeneratorTest {
         stats.setMaxElevation(550);
         stats.setMinElevation(-500);
         stats.setTotalElevationGain(6000);
+        stats.setTotalElevationLoss(6000);
         stats.setStartTime_ms(START_TIME);
         track.setTrackStatistics(stats);
         track.setCategory("hiking");
@@ -84,6 +85,7 @@ public class DescriptionGeneratorTest {
                 + "Max elevation: 550 m (1804 ft)<br>"
                 + "Min elevation: -500 m (-1640 ft)<br>"
                 + "Elevation gain: 6000 m (19685 ft)<br>"
+                + "Elevation loss: 6000 m (19685 ft)<br>"
                 + "Recorded: " + StringUtils.formatDateTime(context, START_TIME) + "<br>";
 
         assertEquals(expected, descriptionGenerator.generateTrackDescription(track, true));
@@ -100,6 +102,7 @@ public class DescriptionGeneratorTest {
         stats.setMaxElevation(Double.POSITIVE_INFINITY);
         stats.setMinElevation(Double.NEGATIVE_INFINITY);
         stats.setTotalElevationGain(6000);
+        stats.setTotalElevationLoss(6000);
         stats.setStartTime_ms(START_TIME);
         track.setTrackStatistics(stats);
         track.setCategory("hiking");
@@ -118,6 +121,7 @@ public class DescriptionGeneratorTest {
                         + "Average moving pace: 0:15 min/km (0:24 min/mi)<br>"
                         + "Fastest pace: 0:10 min/km (0:16 min/mi)<br>"
                         + "Elevation gain: 6000 m (19685 ft)<br>"
+                        + "Elevation loss: 6000 m (19685 ft)<br>"
                         + "Recorded: " + StringUtils.formatDateTime(context, START_TIME) + "<br>";
 
         assertEquals(expected, descriptionGenerator.generateTrackDescription(track, true));

src/androidTest/java/de/dennisguse/opentracks/services/sensors/ElevationSumManagerTest.java

@@ -32,7 +32,7 @@ public class ElevationSumManagerTest {
 
         // then
         Assert.assertEquals(0f, elevationSumManager.getElevationGain_m(), 0.01);
-        Assert.assertEquals(-48.0, elevationSumManager.getElevationLoss_m(), 0.01);
+        Assert.assertEquals(48.0, elevationSumManager.getElevationLoss_m(), 0.01);
     }
 
     @Test

src/androidTest/java/de/dennisguse/opentracks/util/PressureSensorUtilsTest.java

@@ -43,7 +43,7 @@ public class PressureSensorUtilsTest {
 
         // then
         assertEquals(0f, elevationGain_m, 0.01);
-        assertEquals(-15.0f, elevationLoss_m, 0.01);
+        assertEquals(15.0f, elevationLoss_m, 0.01);
         assertEquals(1016.80f, lastUsedPressureValue_hPa, 0.01); //Expect exponential smoothing
     }
 }