Add an activity setup button in stat page when the activity type is not support to calculate calorie.

MyTracks/res/layout/stats_content.xml

@@ -142,5 +142,12 @@ limitations under the License.
     <include
       android:id="@+id/stats_calorie"
       layout="@layout/stats_small_item" />
+    <!-- Setup activity type-->
+    <Button
+      android:id="@+id/stats_calorie_setup"
+      android:layout_gravity="right"
+      android:layout_height="wrap_content"
+      android:layout_width="match_parent"
+      android:text="@string/stats_calorie_setup" />
   </LinearLayout>
 </merge>

MyTracks/res/values/strings.xml

@@ -2146,11 +2146,11 @@ limitations under the License.
       Character limit: ~23 (1 line)">
     Calories
   </string>
-  <string name="stats_calorie_invalid_type"
+  <string name="stats_calorie_setup"
-    translation_description="In the 'Stats' page, the calorie value label while pending.
+    translation_description="In the 'Stats' page, the button to setup calorie.
     
       Character limit: ~23 (1 line)">
-    Calories(Invalid type)
+    Setup Activity Type
   </string>
   <string name="stats_fastest_pace"
     translation_description="In the 'Stats' page, the fastest pace.">

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

@@ -19,6 +19,7 @@ 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;
 
@@ -36,7 +37,8 @@ public class AggregatedStatsActivity extends AbstractMyTracksActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
-    StatsUtils.setTripStatisticsValues(this, getTripStatistics());
+    StatsUtils.setTripStatisticsValues(this, getTripStatistics(),
+        PreferencesUtils.RECORDING_TRACK_ID_DEFAULT);
     StatsUtils.setLocationValues(this, null, false);
   }
 

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

@@ -181,8 +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())) {
+        if (!category.equals(track.getCategory())) {
-          double calorie = CalorieUtils.calculateTrackCalorie(getApplicationContext(), track, category);
+          // TODO Is there no race condition when setCalorie is called.
+          double calorie = CalorieUtils.calculateTrackCalorie(getApplicationContext(), track,
+              category);
           track.getTripStatistics().setCalorie(calorie);
         }
         track.setCategory(category);

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

@@ -24,6 +24,7 @@ import com.google.android.apps.mytracks.content.Waypoint;
 import com.google.android.apps.mytracks.content.Waypoint.WaypointType;
 import com.google.android.apps.mytracks.util.IntentUtils;
 import com.google.android.apps.mytracks.util.PhotoUtils;
+import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.StatsUtils;
 import com.google.android.maps.mytracks.R;
 
@@ -192,7 +193,8 @@ 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());
+      StatsUtils.setTripStatisticsValues(getActivity(), waypoint.getTripStatistics(),
+          PreferencesUtils.RECORDING_TRACK_ID_DEFAULT);
       StatsUtils.setLocationValues(getActivity(), waypoint.getLocation(), false);
     }
   }

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

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

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

@@ -285,7 +285,7 @@ public class CalorieUtils {
       return TripStatistics.INVALID_CALORIE;
     }
 
-    double calorie = 0;
+    double calorie = 0.0;
     MyTracksProviderUtils providerUtils = MyTracksProviderUtils.Factory.get(context);
     long trackId = track.getId();
     LocationIterator points = providerUtils.getTrackPointLocationIterator(trackId, -1, false,

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

@@ -16,12 +16,16 @@
 
 package com.google.android.apps.mytracks.util;
 
+import com.google.android.apps.mytracks.TrackEditActivity;
 import com.google.android.apps.mytracks.stats.TripStatistics;
 import com.google.android.maps.mytracks.R;
 
 import android.app.Activity;
+import android.content.Intent;
 import android.location.Location;
 import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
 import android.widget.TextView;
 
 import java.util.Locale;
@@ -110,7 +114,7 @@ public class StatsUtils {
    * @param tripStatistics the trip statistics
    * @param trackId the id of track
    */
-  public static void setTripStatisticsValues(Activity activity, TripStatistics tripStatistics) {
+  public static void setTripStatisticsValues(Activity activity, TripStatistics tripStatistics, long trackId) {
     boolean metricUnits = PreferencesUtils.isMetricUnits(activity);
     boolean reportSpeed = PreferencesUtils.isReportSpeed(activity);
 
@@ -188,7 +192,7 @@ public class StatsUtils {
       if (tripStatistics != null) {
         calories = tripStatistics.getCalorie();
       }
-      setCalorie(activity, R.id.stats_calorie, calories);
+      setCalorie(activity, R.id.stats_calorie, calories, trackId);
     } else {
       calorieHorizontalLine.setVisibility(View.GONE);
       calorieContainer.setVisibility(View.GONE);
@@ -341,15 +345,37 @@ public class StatsUtils {
    * @param activity the activity
    * @param itemId the item id
    * @param calorie the value of calorie
-   * @param trackId the id of track
+   * @param trackId the id of track which is used to start track edit activity
+   *          when user want to change the activity type
    */
-  private static void setCalorie(Activity activity, int itemId, double calorie) {
+  private static void setCalorie(final Activity activity, int itemId, double calorie,
-    String calorieString = String.format(Locale.getDefault(), CALORIES_FORMAT, calorie);
+      final long trackId) {
+    String calorieString;
+    View view = activity.findViewById(itemId);
+    Button button = (Button) activity.findViewById(R.id.stats_calorie_setup);
     // Current activity type is not supported.
     if (calorie == TripStatistics.INVALID_CALORIE) {
-      calorieString = activity.getString(R.string.value_unknown);
+      // Return when it is not a valid track, which may be aggregated stats or
+      // marker.
+      if (trackId == PreferencesUtils.RECORDING_TRACK_ID_DEFAULT) {
+        return;
+      }
+      button.setVisibility(View.VISIBLE);
+      view.setVisibility(View.GONE);
+      button.setOnClickListener(new OnClickListener() {
+        @Override
+        public void onClick(View v) {
+          Intent intent = IntentUtils.newIntent(activity, TrackEditActivity.class).putExtra(
+              TrackEditActivity.EXTRA_TRACK_ID, trackId);
+          activity.startActivity(intent);
+        }
+      });
+    } else {
+      button.setVisibility(View.GONE);
+      view.setVisibility(View.VISIBLE);
+      calorieString = String.format(Locale.getDefault(), CALORIES_FORMAT, calorie);
+      setItem(activity, itemId, R.string.stats_calorie, calorieString,
+          activity.getString(R.string.unit_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

@@ -70,7 +70,7 @@ public class TripStatistics implements Parcelable {
    * This value means the calorie value is invalid due to activity type is not
    * supported.
    */
-  public static final double INVALID_CALORIE = -1;
+  public static final double INVALID_CALORIE = -1.0;
 
   /**
    * Default constructor.
@@ -129,7 +129,9 @@ public class TripStatistics implements Parcelable {
       gradeExtremities.update(other.gradeExtremities.getMin());
       gradeExtremities.update(other.gradeExtremities.getMax());
     }
-    calorie += other.calorie;
+    if (other.calorie != INVALID_CALORIE) {
+      calorie += other.calorie;
+    }
   }
 
   /**
@@ -585,9 +587,9 @@ public class TripStatistics implements Parcelable {
    */
   public void addCalorie(double calorieAdded) {
     if (calorieAdded != INVALID_CALORIE) {
-      this.calorie += calorieAdded;
+      calorie = calorie == INVALID_CALORIE ? calorieAdded : calorie + calorieAdded;
     } else {
-      this.calorie = INVALID_CALORIE;
+      calorie = INVALID_CALORIE;
     }
   }