ItemTouchHelper(object : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT) {
            override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
                return false
            }

            override fun onSwiped(viewHolder: RecyclerView.ViewHolder, swipeDir: Int) {
                val id = viewHolder.itemView.tag as Int

                val dbHelper = BookDbHelper(this@CartActivity)
                val sharedPrefs = getSharedPreferences("cartPrefs", Activity.MODE_PRIVATE)
                val cartValue = (sharedPrefs.getFloat("cartValue", 0F)).toDouble()
                val preferencesEditor = sharedPrefs.edit()
                preferencesEditor.putFloat("cartValue", (cartValue - dbHelper.getPriceOfBook(id)).toFloat())
                preferencesEditor.apply()


                val stringId = Integer.toString(id)
                var uri = BookContract.CartEntry.CONTENT_URI
                uri = uri.buildUpon().appendPath(stringId).build()

                contentResolver.delete(uri, null, null)

                Toast.makeText(this@CartActivity, getString(R.string.deleted), Toast.LENGTH_SHORT).show()

                supportLoaderManager.restartLoader(BOOK_LOADER_ID, null, this@CartActivity)

            }
        }).attachToRecyclerView(shoppingList)