Не удаляется строка из sqllite БД

Не работает удаление строк из БД. Причем при любом вызове. SQL запрос проверяется на синтаксис, но не проверяется на логику. Он как будто игнорируется.

Вот код:

java class

public class AdminPage extends Activity {
    private static AdapterAdminPage adapterAdminPage;
    private RecyclerView recyclerView;
    private static ArrayList<Integer> id;
    private static ArrayList<String> name;
    private static ArrayList<String> phone;
    private static ArrayList<String> address;
    private static ArrayList<String> pizzas;
    private TextView t;
    WorkBD workBD;
    private Cursor cursor;
    private static boolean b;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.admin_page);
        workBD = new WorkBD(this);
    }

    public void Refresh(View v) {
        getItemForAdapter();
    }

    private void getItemForAdapter() {
        id = new ArrayList<>();
        name = new ArrayList<>();
        address = new ArrayList<>();
        phone = new ArrayList<>();
        pizzas = new ArrayList<>();
        SQLiteDatabase db = workBD.getReadableDatabase();
        //db.execSQL("DELETE FROM pizzaOrders WHERE _id = " + 1 + ";");
        cursor = db.query(WorkBD.TABLE_CONTACTS, null, null, null, null, null, null);
        cursor.moveToFirst();
        do {
            try {
                id.add(cursor.getInt(cursor.getColumnIndex(WorkBD.KEY_ID)));
                String pizza1 = "Пепперони: " + Integer.toString(cursor.getInt(cursor.getColumnIndex("pizza1"))) + "\n";
                String pizza2 = "Кальцоне: " + Integer.toString(cursor.getInt(cursor.getColumnIndex("pizza2"))) + "\n";
                String pizza3 = "Четыре сезона: " + Integer.toString(cursor.getInt(cursor.getColumnIndex("pizza3"))) + "\n";
                String pizza4 = "Четыре сыра: " + Integer.toString(cursor.getInt(cursor.getColumnIndex("pizza4"))) + "\n";
                String pizza5 = "Мексиканская: " + Integer.toString(cursor.getInt(cursor.getColumnIndex("pizza5"))) + "\n";
                name.add(cursor.getString(cursor.getColumnIndex(WorkBD.KEY_NAME)));
                phone.add(cursor.getString(cursor.getColumnIndex(WorkBD.KEY_NUMBER)));
                address.add(cursor.getString(cursor.getColumnIndex(WorkBD.KEY_ADDRESS)));
                pizzas.add(pizza1 + pizza2 + pizza3 + pizza4 + pizza5);
            } catch (Exception e) {
                t = findViewById(R.id.NoOrders);
                t.setText("ПОКА \n НЕТ \n ЗАКАЗОВ \n :/ \n \n \n");
            }
        }
        while (cursor.moveToNext());
        db.close();
        if (b) {
            adapterAdminPage.refreshData(name, phone, address, pizzas);
            b = false;
        } else
            setAdapterAdminPage();
    }

    private void setAdapterAdminPage() {
        recyclerView = findViewById(R.id.AdminRecyclerView);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        recyclerView.setLayoutManager(layoutManager);
        adapterAdminPage = new AdapterAdminPage(name, phone, address, pizzas);
        ItemTouchHelper itemTouchHelper = new ItemTouchHelper(itemTouchHelperCallback);
        recyclerView.addItemDecoration(itemTouchHelper);
        itemTouchHelper.attachToRecyclerView(recyclerView);
        recyclerView.setAdapter(adapterAdminPage);
    }

    private final ItemTouchHelper.Callback itemTouchHelperCallback = new ItemTouchHelper.Callback() {

        @Override
        public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
            return makeMovementFlags(ItemTouchHelper.ACTION_STATE_IDLE, ItemTouchHelper.END);
        }

        @Override
        public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
            return false;
        }

        @Override
        public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
            int id = (int) viewHolder.getAdapterPosition();
            Log.i(TAG, Integer.toString(id));
            SQLiteDatabase db = workBD.getReadableDatabase();
            db.execSQL("DELETE FROM pizzaOrders WHERE _id = " + id + ";");
            b = true;
            getItemForAdapter();
            Log.i(TAG, "onSwiped");
        }
    };
}

Класс, отвечающий за работу с БД:

public class WorkBD extends SQLiteOpenHelper {
    public static final int DATABASE_VERSION = 4;
    public static final String DATABASE_NAME = "pizzaDb.db";
    public static final String TABLE_CONTACTS = "pizzaOrders";

    public static final String KEY_ID = "_id";
    public static final String KEY_NAME = "name";
    public static final String KEY_NUMBER = "number";
    public static final String KEY_ADDRESS = "address";
    public static final String KEY_PIZZA1 = "pizza1";
    public static final String KEY_PIZZA2 = "pizza2";
    public static final String KEY_PIZZA3 = "pizza3";
    public static final String KEY_PIZZA4 = "pizza4";
    public static final String KEY_PIZZA5 = "pizza5";

    public WorkBD(@Nullable Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL("CREATE TABLE " + TABLE_CONTACTS + " (" + KEY_ID + " INTEGER PRIMARY KEY, " + KEY_NAME + " TEXT, " + KEY_NUMBER + " TEXT, " + KEY_ADDRESS + " TEXT, " + KEY_PIZZA1 + " TEXT, " + KEY_PIZZA2 + " TEXT, " + KEY_PIZZA3 + " TEXT, " + KEY_PIZZA4 + " TEXT, " + KEY_PIZZA5 + " TEXT " + " )");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        db.execSQL("DROP TABLE IF EXISTS " + TABLE_CONTACTS);
        onCreate(db);
    }
}