workin on issue #141

android/Pictogram/commonlibrary/src/main/java/com/yottacode/pictogram/grammar/Vocabulary.java

@@ -78,6 +78,7 @@ public class Vocabulary implements Iterable<Picto>  {
                                 modifyAttsPicto(picto_cat, picto_id, args.getJSONObject("attributes"));
                             } catch (JSONException e) {
                                 e.printStackTrace();
+                                Log.e(LOG_TAG,e.getMessage());
                             }
                             break;
                         }
@@ -134,7 +135,8 @@ public class Vocabulary implements Iterable<Picto>  {
     private  boolean synchronize_upload() {
         boolean upload_pending=false;
         try {
-            PCBcontext.getPcbdb().getStudentVocabulary(this);
+                this.pictos.clear();
+                PCBcontext.getPcbdb().getStudentVocabulary(this);
         } catch (JSONException e) {
             Log.e(this.getClass().getName(), " Picto json error from local storage: " + e.getMessage());
         }
@@ -252,7 +254,7 @@ public class Vocabulary implements Iterable<Picto>  {
                pictos_cat = new LinkedList<>();
                pictos.put(new Integer(picto.get_category()),pictos_cat);
            }
-           pictos_cat.add(picto);
+
            imgs.add(new Img(picto.get_id(), picto.get_url(), Img.VOCABULARY));
        }
        Log.d(this.getClass().getName(), "Vocabulary size: " + updated_collection.length);
@@ -393,12 +395,13 @@ public class Vocabulary implements Iterable<Picto>  {
             return this.pictos.get(new Integer(Picto.NO_CATEGORY));
         } else {
             LinkedList<Picto> freePictos = new LinkedList<>();
-            for (LinkedList<Picto> category : pictos.values()) {
-                for (Picto picto : category) {
+            LinkedList<Picto> category=pictos.get(new Integer(Picto.NO_CATEGORY));
+                //for (Picto picto : category) {
+
+            for (Picto picto: category) {
                     if (picto.getFreeRow() != -1 && picto.getFreeColumn() != -1) {
                         freePictos.add(picto);
                     }
-                }
             }
             return freePictos;
         }