bookmark탭 에러 질문드립니다

안녕하세요

확인해보니 아래에서 문제가 발생합니다.

if(bookmarkIdList.contains(dataModel.key.toString())) {
    items.add(item!!)
    itemKeyList.add(dataModel.key.toString())
}

bookmarkIdList를 받아오지 않은 시점에서 bookmarkIdList에 있는 것들을 조건으로 items, itemKeyList를 조회해서 생기는 문제입니다.

디버깅을 위해 로그를 찍었는데 아래와 같이 변경해서 로그를 확인해보시겠어요?

bookmarkIdList 를 받아온 다음 getCateData()  가 실행되도록 하였습니다. 

package com.shinyelee.my_solo_life.Fragments

import android.os.Bundle
import android.util.Log
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.databinding.DataBindingUtil
import androidx.navigation.findNavController
import androidx.recyclerview.widget.GridLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.google.firebase.database.DataSnapshot
import com.google.firebase.database.DatabaseError
import com.google.firebase.database.ValueEventListener
import com.shinyelee.my_solo_life.R
import com.shinyelee.my_solo_life.contentsList.BookmarkRVAdapter
import com.shinyelee.my_solo_life.contentsList.ContentsModel
import com.shinyelee.my_solo_life.contentsList.ContentsRVAdapter
import com.shinyelee.my_solo_life.databinding.FragmentBookmarkBinding
import com.shinyelee.my_solo_life.utils.FBAuth
import com.shinyelee.my_solo_life.utils.FBRef

class BookmarkFragment : Fragment() {

    // binding
    private lateinit var binding : FragmentBookmarkBinding

    private val TAG = BookmarkFragment::class.java.simpleName

    val bookmarkIdList = mutableListOf<String>()
    val items = ArrayList<ContentsModel>()
    val itemKeyList = ArrayList<String>()
    lateinit var rvAdapter: BookmarkRVAdapter

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
    }

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

        // binding
        binding = DataBindingUtil.inflate(inflater, R.layout.fragment_bookmark, container, false)

        // 1. 전체 카테고리의 컨텐츠 데이터를 다 가져옴
//        getCateData()

        // 2. 사용자가 북마크한 정보를 다 가져옴
        getBookmarkData()

        // 3. 전체 컨텐츠 중 사용자가 북마크한 정보만 보여줌
        rvAdapter = BookmarkRVAdapter(requireContext(), items, itemKeyList, bookmarkIdList)
        val rv : RecyclerView = binding.bookmarkRV
        rv.adapter = rvAdapter
        rv.layoutManager = GridLayoutManager(requireContext(), 2)

        // bookmark - home
        binding.homeT.setOnClickListener {
            it.findNavController().navigate(R.id.action_bookmarkFragment_to_homeFragment)
        }
        // bookmark -> tip
        binding.tipT.setOnClickListener {
            it.findNavController().navigate(R.id.action_bookmarkFragment_to_tipFragment)
        }
        // bookmark -> talk
        binding.talkT.setOnClickListener {
            it.findNavController().navigate(R.id.action_bookmarkFragment_to_talkFragment)
        }
        // bookmark -> store
        binding.storeT.setOnClickListener {
            it.findNavController().navigate(R.id.action_bookmarkFragment_to_storeFragment)
        }
        return binding.root

    }

    // 1. 전체 카테고리의 컨텐츠 데이터를 다 가져옴
    private fun getCateData() {

        Log.e(TAG, "getCateData")

        val postListener = object : ValueEventListener {

            override fun onDataChange(dataSnapshot: DataSnapshot) {

                Log.e(TAG, "dataSnapshot.children" + dataSnapshot.children.count())

                for(dataModel in dataSnapshot.children) {
                    Log.e(TAG, "dataModel : " + dataModel.toString())
                    val item = dataModel.getValue(ContentsModel::class.java)
                    // 3. 전체 컨텐츠 중 사용자가 북마크한 정보만 보여줌
                    if(bookmarkIdList.contains(dataModel.key.toString())) {
                        items.add(item!!)
                        itemKeyList.add(dataModel.key.toString())
                    }


                }

                Log.e(TAG, "items" + items.toString())
                Log.e(TAG, "itemKeyList" + itemKeyList.toString())

                rvAdapter.notifyDataSetChanged()
            }

            override fun onCancelled(databaseError: DatabaseError) {
                // Getting Post failed, log a message
                Log.w("ContentsListActivity", "loadPost:onCancelled", databaseError.toException())
            }

        }
        FBRef.cate1.addValueEventListener(postListener)
        FBRef.cate2.addValueEventListener(postListener)
    }

    // 2. 사용자가 북마크한 정보를 다 가져옴
    private fun getBookmarkData() {
        val postListener = object : ValueEventListener {

            override fun onDataChange(dataSnapshot: DataSnapshot) {
                for(dataModel in dataSnapshot.children) {
                    Log.e(TAG, dataModel.toString())
                    bookmarkIdList.add(dataModel.key.toString())
                }
                Log.e(TAG, "bookmarkIdList" + bookmarkIdList.toString())
                getCateData()
            }

            override fun onCancelled(databaseError: DatabaseError) {
                // Getting Post failed, log a message
                Log.w("ContentsListActivity", "loadPost:onCancelled", databaseError.toException())
            }

        }
        FBRef.bookmarkRef.child(FBAuth.getUid()).addValueEventListener(postListener)
    }

}