Minor fixes

UI/AndroidApp/flavoursWithoutBorders/app/src/main/java/gr/auth/databases/flavours/activities/food/FoodActivity.java

@@ -240,11 +240,13 @@ public class FoodActivity extends BaseActivity {
                     avgRestaurantRating = jsonResponse.getJSONObject(JSON_TAG_FOOD_AVG_RATING_OBJ).getDouble(JSON_TAG_FOOD_AVG_RATING);
                 }
 
+                String foodCaloriesString = jsonFoodInfo.getString(JSON_TAG_FOOD_CALORIES);
+
                 food = new Food(jsonFoodInfo.getInt(JSON_TAG_FOOD_ID),
                         jsonFoodInfo.getString(JSON_TAG_FOOD_NAME),
                         jsonResponse.getString(JSON_TAG_FOOD_RESTAURANT_NAME),
                         jsonFoodInfo.getString(JSON_TAG_FOOD_DESCRIPTION),
-                        jsonFoodInfo.getInt(JSON_TAG_FOOD_CALORIES),
+                        foodCaloriesString.equals("null") ? -1 : Integer.parseInt(foodCaloriesString),
                         avgRestaurantRating);
 
                 JSONArray jsonIngredients = jsonResponse.getJSONArray(JSON_TAG_FOOD_INGREDIENTS);

UI/AndroidApp/flavoursWithoutBorders/app/src/main/java/gr/auth/databases/flavours/activities/food/fragments/FoodInfoFragment.java

@@ -43,7 +43,11 @@ public class FoodInfoFragment extends Fragment {
         TextView restaurantServing = rootView.findViewById(R.id.food_serving_restaurant);
         restaurantServing.setText(getString(R.string.food_serving_restaurant_placeholder, food.getRestaurantName()));
         TextView calories = rootView.findViewById(R.id.food_calories);
+        if (food.getCalories() != -1) {
             calories.setText(getString(R.string.food_calories_placeholder, food.getCalories()));
+        } else {
+            calories.setVisibility(View.GONE);
+        }
         TextView rating = rootView.findViewById(R.id.food_rating);
         if (food.getRating() != -1) {
             rating.setText(getString(R.string.food_rating_placeholder, food.getRating()));