How to update product quantity sqlite database Android?

CheckOrderExists 2 value add 1.recipe_id 2.qty + button increase qty not update.Addcart if condition not working else condition working.I want to update the qty of product when adding a product.update qty sqlite not show

    public void Addcart(String category_name, long recipe_id, String recipe_title, String recipe_time, String recipe_image, String recipe_description, String video_url, String video_id, String content_type, String featured, String tags, long total_views, String _stringVal) {


    try {
        if (!CheckOrderExists(recipe_id).equalsIgnoreCase("0")) {
            UpdateOrderData(recipe_id, _stringVal);


            Toast.makeText(mContext, "Hello World", Toast.LENGTH_SHORT).show();

        } else {
            SQLiteDatabase db = this.getWritableDatabase();

            ContentValues values = new ContentValues();
            values.put(KEY_CAT_NAME, category_name);
            values.put(KEY_RECIPE_ID, recipe_id);
            values.put(KEY_RECIPE_TITLE, recipe_title);
            values.put(KEY_RECIPE_TIME, recipe_time);
            values.put(KEY_RECIPE_IMAGE, recipe_image);
            values.put(KEY_RECIPE_DESCRIPTION, recipe_description);
            values.put(KEY_VIDEO_URL, video_url);
            values.put(KEY_VIDEO_ID, video_id);
            values.put(KEY_CONTENT_TYPE, content_type);
            values.put(KEY_FEATURED, featured);
            values.put(KEY_TAGS, tags);
            values.put(KEY_TOTAL_VIEWS, total_views);
            values.put(KEY_QTY, _stringVal);
            // Inserting Row
            db.insert(TABLE_ADDCART, null, values);
            db.close(); // Closing database connection
        }
    } catch (Exception e) {


    }

}

CheckOrderExists ZERO IS DELECTE table

     public String CheckOrderExists( long recipe_id) {

    String _stringVal = "0";
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery("SELECT * FROM " + TABLE_ADDCART + " WHERE " + KEY_RECIPE_ID+ " = ?", new String[]{String.valueOf(recipe_id)});
    if (cursor.moveToFirst()) {
        _stringVal = cursor.getString(cursor.getColumnIndexOrThrow(KEY_QTY));


        if (_stringVal.equals("0")) {
            db.execSQL("DELETE FROM " + TABLE_ADDCART + " WHERE " + KEY_RECIPE_ID+" = ?", new String[]{String.valueOf(recipe_id)});

        }
    }
    cursor.close();
    db.close();

    return _stringVal;
}

UPDATEORDER

        public void UpdateOrderData(long recipe_id,String _stringVal) {
    SQLiteDatabase db = this.getWritableDatabase();
    if (_stringVal.equals("0")) {
        DeleteOrderData(recipe_id);
    } else {
        ContentValues values = new ContentValues();
        values.put(KEY_QTY, _stringVal);
        db.update(TABLE_ADDCART, values, recipe_id + " = ?" , new String[]{String.valueOf(recipe_id)});


    }
    db.close();
}

I want when user click “add to cart” button then the quantity will be updated. But quantity is updated after I click the button twice.