Re-calculate the calorie while user change the activity type of track. Show standard "value_unknown" (-) when the activity type is not supported.

MyTracks/src/com/google/android/apps/mytracks/AggregatedStatsActivity.java

@@ -19,7 +19,6 @@ package com.google.android.apps.mytracks;
 import com.google.android.apps.mytracks.content.MyTracksProviderUtils;
 import com.google.android.apps.mytracks.content.Track;
 import com.google.android.apps.mytracks.stats.TripStatistics;
-import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.StatsUtils;
 import com.google.android.maps.mytracks.R;
 
@@ -37,8 +36,7 @@ public class AggregatedStatsActivity extends AbstractMyTracksActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
-    StatsUtils.setTripStatisticsValues(this, getTripStatistics(),
-        PreferencesUtils.RECORDING_TRACK_ID_DEFAULT);
+    StatsUtils.setTripStatisticsValues(this, getTripStatistics());
     StatsUtils.setLocationValues(this, null, false);
   }
 

MyTracks/src/com/google/android/apps/mytracks/TrackEditActivity.java

@@ -21,6 +21,7 @@ import com.google.android.apps.mytracks.content.Track;
 import com.google.android.apps.mytracks.fragments.ChooseActivityTypeDialogFragment;
 import com.google.android.apps.mytracks.fragments.ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller;
 import com.google.android.apps.mytracks.util.ApiAdapterFactory;
+import com.google.android.apps.mytracks.util.CalorieUtils;
 import com.google.android.apps.mytracks.util.TrackIconUtils;
 import com.google.android.apps.mytracks.util.TrackNameUtils;
 import com.google.android.maps.mytracks.R;
@@ -180,6 +181,10 @@ public class TrackEditActivity extends AbstractMyTracksActivity
       public void onClick(View v) {
         track.setName(name.getText().toString());
         String category = activityType.getText().toString();
+        if(!category.equals(track.getCategory())) {
+          double calorie = CalorieUtils.calculateTrackCalorie(getApplicationContext(), track, category);
+          track.getTripStatistics().setCalorie(calorie);
+        }
         track.setCategory(category);
         track.setIcon(TrackIconUtils.getIconValue(TrackEditActivity.this, category));
         track.setDescription(description.getText().toString());

MyTracks/src/com/google/android/apps/mytracks/fragments/MarkerDetailFragment.java

@@ -192,8 +192,7 @@ public class MarkerDetailFragment extends Fragment {
       TextView name = (TextView) getView().findViewById(R.id.marker_detail_statistics_name);
       name.setText(getString(R.string.generic_name_line, waypoint.getName()));
 
-      StatsUtils.setTripStatisticsValues(getActivity(), waypoint.getTripStatistics(),
-          waypoint.getTrackId());
+      StatsUtils.setTripStatisticsValues(getActivity(), waypoint.getTripStatistics());
       StatsUtils.setLocationValues(getActivity(), waypoint.getLocation(), false);
     }
   }

MyTracks/src/com/google/android/apps/mytracks/fragments/StatsFragment.java

@@ -259,11 +259,7 @@ public class StatsFragment extends Fragment implements TrackDataListener {
    * Updates the UI.
    */
   private void updateUi(FragmentActivity activity) {
-    StatsUtils.setTripStatisticsValues(
-        activity,
-        lastTripStatistics,
-        trackDataHub == null ? PreferencesUtils.RECORDING_TRACK_ID_DEFAULT : trackDataHub
-            .getSelectedTrackId());
+    StatsUtils.setTripStatisticsValues(activity, lastTripStatistics);
     StatsUtils.setLocationValues(activity, lastLocation, isSelectedTrackRecording());
   }
 }

MyTracks/src/com/google/android/apps/mytracks/util/CalorieUtils.java

@@ -16,6 +16,7 @@
 package com.google.android.apps.mytracks.util;
 
 import com.google.android.apps.mytracks.content.MyTracksProviderUtils;
+import com.google.android.apps.mytracks.content.MyTracksProviderUtils.LocationIterator;
 import com.google.android.apps.mytracks.content.Track;
 import com.google.android.apps.mytracks.stats.TripStatistics;
 import com.google.android.maps.mytracks.R;
@@ -224,9 +225,9 @@ public class CalorieUtils {
     return ActivityType.CYCLING == activityType ? calculateCalorieCycling(start, stop, grade,
         weight) : calculateCalorieFoot(start, stop, grade, weight);
   }
-  
+
   /**
-   * Gets the activity type for calculating calorie by the category of track.
+   * Gets the activity type for calculating calorie by the id of track.
    * 
    * @param context current context
    * @param trackId the id of track
@@ -250,4 +251,56 @@ public class CalorieUtils {
 
     return activityType;
   }
+
+  /**
+   * Gets the activity type for calculating calorie by the category of track.
+   * 
+   * @param context current context
+   * @param category the category of track
+   * @return activityType the activity type of track.
+   */
+  private static ActivityType getActivityType(Context context, String category) {
+    ActivityType activityType = ActivityType.INVALID;
+    if (category.equals(context.getString(R.string.activity_type_walking))
+        || category.equals(context.getString(R.string.activity_type_running))) {
+      activityType = ActivityType.FOOT;
+    } else if (category.equals(context.getString(R.string.activity_type_cycling))
+        || category.equals(context.getString(R.string.activity_type_biking))) {
+      activityType = ActivityType.CYCLING;
+    }
+
+    return activityType;
+  }
+
+  /**
+   * Calculates the calorie of track.
+   * 
+   * @param context the context
+   * @param track the track to calculate
+   * @param category the category of track
+   */
+  public static double calculateTrackCalorie(Context context, Track track, String category) {
+    ActivityType activityType = getActivityType(context, category);
+    if (activityType == ActivityType.INVALID) {
+      return TripStatistics.INVALID_CALORIE;
+    }
+
+    double calorie = 0;
+    MyTracksProviderUtils providerUtils = MyTracksProviderUtils.Factory.get(context);
+    long trackId = track.getId();
+    LocationIterator points = providerUtils.getTrackPointLocationIterator(trackId, -1, false,
+        MyTracksProviderUtils.DEFAULT_LOCATION_FACTORY);
+    // TODO How get grade
+    double grade = 0;
+    if (points.hasNext()) {
+      Location start = points.next();
+      while (points.hasNext()) {
+        Location stop = points.next();
+        calorie += getCalorie(start, stop, grade, PreferencesUtils.getInt(context,
+            R.string.stats_weight_key, PreferencesUtils.STATS_WEIGHT_DEFAULT), activityType);
+        start = stop;
+      }
+    }
+    return calorie;
+  }
 }

MyTracks/src/com/google/android/apps/mytracks/util/StatsUtils.java

@@ -17,7 +17,6 @@
 package com.google.android.apps.mytracks.util;
 
 import com.google.android.apps.mytracks.stats.TripStatistics;
-import com.google.android.apps.mytracks.util.CalorieUtils.ActivityType;
 import com.google.android.maps.mytracks.R;
 
 import android.app.Activity;
@@ -111,8 +110,7 @@ public class StatsUtils {
    * @param tripStatistics the trip statistics
    * @param trackId the id of track
    */
-  public static void setTripStatisticsValues(Activity activity, TripStatistics tripStatistics,
-      long trackId) {
+  public static void setTripStatisticsValues(Activity activity, TripStatistics tripStatistics) {
     boolean metricUnits = PreferencesUtils.isMetricUnits(activity);
     boolean reportSpeed = PreferencesUtils.isReportSpeed(activity);
 
@@ -190,7 +188,7 @@ public class StatsUtils {
       if (tripStatistics != null) {
         calories = tripStatistics.getCalorie();
       }
-      setCalorie(activity, R.id.stats_calorie, calories, trackId);
+      setCalorie(activity, R.id.stats_calorie, calories);
     } else {
       calorieHorizontalLine.setVisibility(View.GONE);
       calorieContainer.setVisibility(View.GONE);
@@ -345,15 +343,13 @@ public class StatsUtils {
    * @param calorie the value of calorie
    * @param trackId the id of track
    */
-  private static void setCalorie(Activity activity, int itemId, double calorie, long trackId) {
-    int labelId = R.string.stats_calorie;
+  private static void setCalorie(Activity activity, int itemId, double calorie) {
+    String calorieString = String.format(Locale.getDefault(), CALORIES_FORMAT, calorie);
     // Current activity type is not supported.
-    if (trackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT
-        && CalorieUtils.getActivityType(activity, trackId) == ActivityType.INVALID) {
-      labelId = R.string.stats_calorie_invalid_type;
+    if (calorie == TripStatistics.INVALID_CALORIE) {
+      calorieString = activity.getString(R.string.value_unknown);
     }
-    setItem(activity, itemId, labelId,
-        String.format(Locale.getDefault(), CALORIES_FORMAT, calorie),
+    setItem(activity, itemId, R.string.stats_calorie, calorieString,
         activity.getString(R.string.unit_calorie));
   }
 }

MyTracksLib/src/com/google/android/apps/mytracks/stats/TripStatistics.java

@@ -586,6 +586,8 @@ public class TripStatistics implements Parcelable {
   public void addCalorie(double calorieAdded) {
     if (calorieAdded != INVALID_CALORIE) {
       this.calorie += calorieAdded;
+    } else {
+      this.calorie = INVALID_CALORIE;
     }
   }