DB_Shop shop = databaseHandler.getShop(1);
                Product p = Product.newInstance("Produkt", 5.4);
                databaseHandler.createProduct(DB_Product.newInstance(5, p, shop));
                mSectionsPagerAdapter.notifyDataSetChanged();
                ((Fragment_OrderList)mSectionsPagerAdapter.getItem(mViewPager.getCurrentItem())).refreshList();