Как при клике на категорию(CardView) в RecyclerView сформированную из Firebase вывести в Fragment обновленные данные

Question

Пытаюсь при клике на категорию переназначить данные(из Firebase Reference), которые забираются по определенному адресу из базы. При нажатии на категорию пицца - должны подгружаться только ноды из папки со списком пиццы. Пытался сделать переменную, которая будет менять директорию. Не получилось. Получить статично данные любой категории могу(написать в коде путь), нужно реализовать переключение в приложении, не могу понять как.

Фрагмент активной категории, там где ".getReference("$NODE_CATEGORIES/$category/${category}_list")" - задано статическое значение для пиццы.

open class ActiveCategoryFragment : HomeFragment() {

lateinit var foodRV: RecyclerView
private var _binding: FragmentActiveCategoryBinding? = null
private val binding get() = _binding!!


override fun onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
): View {


    _binding = FragmentActiveCategoryBinding.inflate(inflater, container, false)
    val root: View = binding.root

    binding.apply {
        foodRV = mainFoodScroll
        foodRV.layoutManager = GridLayoutManager(context, 2)
        foodArrayList = arrayListOf<FoodData>()
        onClick(CategoryData())
    }
    return root
}

private fun getFoodData() {
    pca_base = FirebaseDatabase.getInstance().reference.child(NODE_CATEGORIES).child(ACTIVE_CATEGORY).child(ACTIVE_CATEGORY + "_list")
    pca_base.addValueEventListener(object : ValueEventListener {
        override fun onDataChange(snapshot: DataSnapshot) {
            foodArrayList.clear()
            if (snapshot.exists()) {
                for (foodSnapsot in snapshot.children) {
                    val food = foodSnapsot.getValue(FoodData::class.java)
                    foodArrayList.add(food!!) //food?.let { foodArrayList.add(it) }
                }
                foodRV.adapter = FoodAdapter(foodArrayList, context!!)
            }
        }

        override fun onCancelled(error: DatabaseError) {
            TODO("Not yet implemented")
        }
    })
}
override fun onDestroyView() {
    super.onDestroyView()
    _binding = null
}

override fun onClick(category: CategoryData) {
    getFoodData()
    super.onClick(category)
}


companion object {
    @JvmStatic
    fun newInstance() = ActiveCategoryFragment()
}

}

Адаптер и холдер:

class CategoryAdapter(
val listener: c_Listener,
private val categoryList: ArrayList<CategoryData>) :
RecyclerView.Adapter<CategoryAdapter.CategoryHolder>() {

override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CategoryHolder {
    val categoryItemView = LayoutInflater.from(parent.context)
        .inflate(R.layout.menu_food_category_item, parent, false)
    return CategoryHolder(categoryItemView)
}

override fun onBindViewHolder(holder: CategoryHolder, position: Int) {
    val currentItem = categoryList[position]
    holder.binding.categoryFoodText.text = currentItem.categoryTitle + "\u0020"
    holder.binding.categoryFoodBuffer.text = currentItem.categoryName

    //Подгрузка картинки элемента.
    Glide.with(holder.binding.categoryFoodImg.context)
        .load(currentItem.categoryImageLink)
        .placeholder(R.drawable.fimage_pizza)
        .error(R.drawable.favorite_star)
        .into(holder.binding.categoryFoodImg)

    holder.bind(categoryList[position], listener)
}

override fun getItemCount(): Int {
    return categoryList.size
}


class CategoryHolder(categoryItem: View) : RecyclerView.ViewHolder(categoryItem) {
    val binding = MenuFoodCategoryItemBinding.bind(categoryItem)
    fun bind(categoryItem: CategoryData, listener: c_Listener) = with(binding)
    {
        foodCategoryItemCard.setOnClickListener() {
            listener.onClick(categoryItem)
        }
    }
}

interface c_Listener {
    fun onClick(category: CategoryData)
}

}

Фрагмент категории и холдер еды на всякий случай:

open class HomeFragment : Fragment(), c_Listener {
private var _binding: FragmentHomeBinding? = null
lateinit var pca_base: DatabaseReference
lateinit var categoryRV: RecyclerView
private val binding get() = _binding!!

override fun onCreateView(
    inflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?
): View {
    _binding = FragmentHomeBinding.inflate(inflater, container, false)
    val root: View = binding.root
    openSubFragment(ActiveCategoryFragment(), R.id.main_food_menu)

    binding.apply {

        categoryRV = categoryScroller
        categoryRV.layoutManager = LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
        categoryArrayList = arrayListOf<CategoryData>()
        getCategoryData()
    }
    return root
}

private fun getCategoryData() {
    pca_base = FirebaseDatabase.getInstance().getReference(NODE_CATEGORIES)
    pca_base.addValueEventListener(object : ValueEventListener {
        override fun onDataChange(snapshot: DataSnapshot) {
            categoryArrayList.clear()
            if (snapshot.exists()) {
                for (categorySnapsot in snapshot.children) {
                    val category = categorySnapsot.getValue(CategoryData::class.java)
                    categoryArrayList.add(category!!)
                }
                categoryRV.adapter = CategoryAdapter(this@HomeFragment, categoryArrayList)
               // categoryRV.adapter = activity?.let { CategoryAdapter(categoryArrayList, it) }
            }
        }

        override fun onCancelled(error: DatabaseError) {
            TODO("Not yet implemented")
        }
    })
}
override fun onDestroyView() {
    super.onDestroyView()
    _binding = null
}
private fun openSubFragment(whatFragment: Fragment, whereToHold: Int) {
    activity!!.supportFragmentManager.beginTransaction()
        .replace(whereToHold, whatFragment, "findFragment")
        .addToBackStack(null)
        .commit()
}

companion object {
    @JvmStatic
    fun newInstance() = HomeFragment()
}

override fun onClick(category: CategoryData) {

    when (category.categoryName) {
        "01_breakfast" -> ACTIVE_CATEGORY = BREAKFAST
        "02_pizza" -> ACTIVE_CATEGORY = PIZZA
        "03_focaccia" -> ACTIVE_CATEGORY = FOCACCIA
        "04_lunch" -> ACTIVE_CATEGORY = LUNCH
        "05_pasta" -> ACTIVE_CATEGORY = PASTA
        "06_hot_snacks" -> ACTIVE_CATEGORY = HOT_SNACKS
        "07_salad" -> ACTIVE_CATEGORY = SALAD
        "08_raviolli" -> ACTIVE_CATEGORY = RAVIOLLI
        "09_hot_meal" -> ACTIVE_CATEGORY = HOT_MEAL
        "10_ice_cream" -> ACTIVE_CATEGORY = ICE_CREAM
        "11_milkshakes" -> ACTIVE_CATEGORY = MILKSHAKE
        "12_hot_drinks" -> ACTIVE_CATEGORY = HOT_DRINKS
        "13_cold_drinks" -> ACTIVE_CATEGORY = COLD_DRINKS
        "14_freezing" -> ACTIVE_CATEGORY = COLD_DRINKS
        else -> ACTIVE_CATEGORY = PIZZA
    }
    
    pca_base = FirebaseDatabase.getInstance().reference
    pca_base.child(ACTIVE).setValue(ACTIVE_CATEGORY).addOnSuccessListener {
    }.addOnFailureListener()
    {
        Toast.makeText(context,"Сохранение в говне!",Toast.LENGTH_SHORT).show()
    }
    //Toast.makeText(context, ACTIVE_CATEGORY, Toast.LENGTH_SHORT).show()
}

}

class FoodAdapter(private val foodList: ArrayList<FoodData>, context: Context) :
RecyclerView.Adapter<FoodAdapter.FoodHolder>() {
private var contextFood = context


override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): FoodHolder {
    val foodItemView = LayoutInflater.from(parent.context)
        .inflate(R.layout.menu_food_item, parent, false)
    return FoodHolder(foodItemView)
}

override fun onBindViewHolder(holder: FoodHolder, position: Int) {
    val currentItem = foodList[position]
    holder.binding.foodItemTitle.text = currentItem.foodName + "\u0020"
    holder.binding.foodItemMass.text ="\u0020" + currentItem.foodMass + " грамм\u0020"
    holder.binding.foodItemPrice.text = "\u0020"+ currentItem.foodPrice + "₽\u0020"
    holder.binding.foodItemPrice.text = "\u0020"+ currentItem.foodPrice + "₽\u0020"
    holder.binding.foodItemPrice.text = "\u0020"+ currentItem.foodPrice + "₽\u0020"


    //Подгрузка картинки элемента.
    Glide.with(holder.binding.foodItemImg.context)
        .load(currentItem.foodImageLink)
        .placeholder(R.drawable.bg_pizza_steam)
        .error(R.drawable.bg_pizza_steam)
        .into(holder.binding.foodItemImg)

    holder.bind(currentItem,contextFood)
}

override fun getItemCount(): Int {
    return foodList.size
}


class FoodHolder(foodItem: View): RecyclerView.ViewHolder(foodItem) {
    val binding = MenuFoodItemBinding.bind(foodItem)
    fun bind(foodItem: FoodData, context: Context) = with(binding)
    {
        foodItemCard.setOnClickListener(){
            Toast.makeText(context,"Нажато: ${foodItemTitle.text}", Toast.LENGTH_SHORT).show()
        }

        foodItemCard.setOnClickListener(){
            val intent_to_food_details = Intent(context, FoodItemDetailsFragment::class.java).apply {
                putExtra("title",foodItemTitle.text.toString())//TODO
                putExtra("price",foodItemPrice.text.toString())
                putExtra("mass",foodItemMass.text.toString())
                putExtra("mass",foodItemMass.text.toString())
                putExtra("mass",foodItemMass.text.toString())
                putExtra("mass",foodItemMass.text.toString())
            }
            context.startActivity(intent_to_food_details)
        }
    }
}

}

БЛОГ НА HUSL

Как при клике на категорию(CardView) в RecyclerView сформированную из Firebase вывести в Fragment обновленные данные

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