Cleanup using Android Studio code analyzer.

src/main/java/de/dennisguse/opentracks/io/file/exporter/KmlTrackWriter.java

@@ -74,7 +74,7 @@ public class KmlTrackWriter implements TrackWriter {
      * @param context           the context
      * @param hasMultipleTracks should encode multiple tracks into one file?
      * @param exportTrackDetail should detailed information about the track be exported (e.g., title, description, waypoints, timing)?
-     * @param exportSensorData  should {@link TrackPointSensorDataSet} be exported?
+     * @param exportSensorData  should {@link TrackPoint}'s sensor data be exported?
      * @param exportPhotos      should pictures be exported (if true: exports to KMZ)?
      */
     public KmlTrackWriter(Context context, boolean hasMultipleTracks, boolean exportTrackDetail, boolean exportSensorData, boolean exportPhotos) {

src/main/java/de/dennisguse/opentracks/io/file/exporter/KmzTrackExporter.java

@@ -42,7 +42,7 @@ import de.dennisguse.opentracks.util.FileUtils;
  * @author Jimmy Shih
  */
 public class KmzTrackExporter implements TrackExporter {
-    public static final String KMZ_IMAGES_DIR = "images";
+    private static final String KMZ_IMAGES_DIR = "images";
     public static final String KMZ_KML_FILE = "doc.kml";
 
     private static final String TAG = KmzTrackExporter.class.getSimpleName();

src/main/java/de/dennisguse/opentracks/io/file/importer/KmzTrackImporter.java

@@ -47,7 +47,7 @@ public class KmzTrackImporter implements TrackImporter {
 
     private static final String TAG = KmzTrackImporter.class.getSimpleName();
 
-    public static final List<String> KMZ_IMAGES_EXT = Arrays.asList("jpeg", "jpg", "png");
+    private static final List<String> KMZ_IMAGES_EXT = Arrays.asList("jpeg", "jpg", "png");
 
     private static final int BUFFER_SIZE = 4096;
 
@@ -154,11 +154,7 @@ public class KmzTrackImporter implements TrackImporter {
             return false;
         }
 
-        if (KMZ_IMAGES_EXT.contains(fileExt)) {
-            return true;
-        }
-
-        return false;
+        return KMZ_IMAGES_EXT.contains(fileExt);
     }
 
     /**