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

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

@@ -33,6 +33,7 @@ public class TrackPoint {
     private Float cyclingCadence_rpm = null;
     private Float power = null;
     private Float elevationGain = null;
+    private Float elevationLoss = null;
 
     public TrackPoint() {
         this.location = new Location("");
@@ -50,6 +51,7 @@ public class TrackPoint {
         this.power = trackPoint.getPower();
 
         this.elevationGain = trackPoint.getElevationGain();
+        this.elevationLoss = trackPoint.getElevationLoss();
     }
 
     public TrackPoint(double latitude, double longitude, Double altitude, long time) {
@@ -107,6 +109,18 @@ public class TrackPoint {
         this.elevationGain = elevationGain;
     }
 
+    public boolean hasElevationLoss() {
+        return elevationLoss != null;
+    }
+
+    public float getElevationLoss() {
+        return elevationLoss;
+    }
+
+    public void setElevationLoss(Float elevationLoss) {
+        this.elevationLoss = elevationLoss;
+    }
+
     public double getLatitude() {
         return location.getLatitude();
     }

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

@@ -54,6 +54,7 @@ public interface TrackPointsColumns extends BaseColumns {
     String SENSOR_CADENCE = "sensor_cadence";
     String SENSOR_POWER = "sensor_power";
     String ELEVATION_GAIN = "elevation_gain";
+    String ELEVATION_LOSS = "elevation_loss";
 
     String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " ("
             + _ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
@@ -69,6 +70,7 @@ public interface TrackPointsColumns extends BaseColumns {
             + SENSOR_CADENCE + " FLOAT, "
             + SENSOR_POWER + " FLOAT, "
             + ELEVATION_GAIN + " FLOAT, "
+            + ELEVATION_LOSS + " FLOAT, "
             + "FOREIGN KEY (" + TRACKID + ") REFERENCES " + TracksColumns.TABLE_NAME + "(" + TracksColumns._ID + ") ON UPDATE CASCADE ON DELETE CASCADE"
             + ")";
 

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

@@ -54,6 +54,7 @@ public interface TracksColumns extends BaseColumns {
     String MINELEVATION = "minelevation"; // minimum elevation
     String MAXELEVATION = "maxelevation"; // maximum elevation
     String ELEVATIONGAIN = "elevationgain"; // elevation gain
+    String ELEVATIONLOSS = "elevationloss"; // elevation loss
     String ICON = "icon"; // track activity type icon
 
     String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " ("
@@ -74,7 +75,8 @@ public interface TracksColumns extends BaseColumns {
             + MAXELEVATION + " FLOAT, "
             + ELEVATIONGAIN + " FLOAT, "
             + ICON + " TEXT, "
-            + UUID + " BLOB)";
+            + UUID + " BLOB, "
+            + ELEVATIONLOSS + " FLOAT)";
 
     String CREATE_TABLE_INDEX = "CREATE UNIQUE INDEX " + TABLE_NAME + "_" + UUID + "_index ON " + TABLE_NAME + "(" + UUID + ")";