Ошибка библиотеки подкачки, не удалось получить данные из Firestore

Question

Я попытался получить данные из Firestore, используя библиотеку подкачки. Приложение работает, но не может получить данные из базы данных. Я не могу найти ошибки в коде. Если кто-нибудь может помочь. Ваша помощь приветствуется. Ниже приведен код.

Модель Класс Примечание

import com.google.firebase.firestore.Exclude
import com.google.firebase.firestore.IgnoreExtraProperties

@IgnoreExtraProperties
data class Note (
    @Transient
    @get:Exclude
    var id :String? = "",
    var rank:Int,
    var name :String? = "null"
)

Репозиторий

import android.util.Log
import androidx.paging.ItemKeyedDataSource
import com.google.firebase.firestore.FirebaseFirestore
import com.karuneshpalekar.firestorepagination.models.Note

class DataRepository {
    companion object {
        const val TAG = "DataRepo"
    }


    val db = FirebaseFirestore.getInstance()
    fun getData(
        startRank: Int,
        size: Int,
        callback: ItemKeyedDataSource.LoadCallback<Note>
    ) {
        db.collection("record").whereGreaterThan("rank", startRank)
            .limit(size.toLong())
            .addSnapshotListener { snapshot, e ->
                if (e != null) {
                    Log.w(TAG, "Error:$e")
                }
                val items = mutableListOf<Note>()
                if (snapshot != null) {
                    for (notes in snapshot) {
                        items.add(notes.toObject(Note::class.java))
                        Log.i(TAG, "Great")
                    }
                    if (items.size == 0) {
                        return@addSnapshotListener
                    }

                    if (callback is ItemKeyedDataSource.LoadInitialCallback) {
                        callback.onResult(items, 0, items.size)

                    } else {
                        callback.onResult(items)
                    }


                }
            }


    }


}

DataSource

import androidx.paging.DataSource
import androidx.paging.ItemKeyedDataSource
import com.karuneshpalekar.firestorepagination.models.Note


class SourceData(private val dataRepository: DataRepository) : ItemKeyedDataSource<Int, Note>() {

    class Factory(private val mydataRepository: DataRepository) :
        DataSource.Factory<Int, Note>() {
        override fun create(): DataSource<Int, Note> =
            SourceData(mydataRepository)

    }

    override fun loadInitial(params: LoadInitialParams<Int>, callback: LoadInitialCallback<Note>) {
        dataRepository.getData(0,params.requestedLoadSize,callback)
    }

    override fun loadAfter(params: LoadParams<Int>, callback: LoadCallback<Note>) {
        dataRepository.getData(params.key,params.requestedLoadSize,callback)
    }

    override fun loadBefore(params: LoadParams<Int>, callback: LoadCallback<Note>) {
       // dataRepository.getData(params.key,params.requestedLoadSize,callback)
    }

    override fun getKey(item: Note): Int = item.rank

}

ViewModel

class DataViewModel(dataRepository: DataRepository) : ViewModel() {
    private val config = PagedList.Config.Builder()
        .setEnablePlaceholders(false)
        .setPrefetchDistance(10)
        .setPageSize(20)
        .build()

    val records: LiveData<PagedList<Note>> =
        LivePagedListBuilder<Int, Note>(SourceData.Factory(dataRepository), config).build()


    }

Адаптер

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.TextView
import androidx.paging.PagedListAdapter
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.RecyclerView
import com.karuneshpalekar.firestorepagination.R
import com.karuneshpalekar.firestorepagination.models.Note

class DataAdapter : PagedListAdapter<Note, DataAdapter.DataViewHolder>(
    object : DiffUtil.ItemCallback<Note>() {
        override fun areItemsTheSame(oldItem: Note, newItem: Note): Boolean =
            oldItem.id == newItem.id

        override fun areContentsTheSame(oldItem: Note, newItem: Note): Boolean = oldItem == newItem

    }
) {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DataViewHolder {

        val view = LayoutInflater.from(parent.context).inflate(R.layout.list_item, parent, false)
        return DataViewHolder(view)
    }

    override fun onBindViewHolder(holder: DataViewHolder, position: Int) {
        val notes = getItem(position)
        if (notes != null) {
            holder.bind(notes)
        }

    }

    class DataViewHolder(view: View) : RecyclerView.ViewHolder(view) {
        val text_name by lazy { view.findViewById<TextView>(R.id.text_view_name) }

        fun bind(note: Note) {

            text_name.text = note.name
        }
    }

}

Фрагмент, отображающий Recyclerview

class Display : Fragment() {

    private lateinit var viewModel: DataViewModel

    private lateinit var factory: DataFactoryRepository


    private val adapter = DataAdapter()

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate the layout for this fragment

        if (::factory.isInitialized) {
            viewModel = ViewModelProviders.of(this, factory).get(DataViewModel::class.java)
        }
        return inflater.inflate(R.layout.fragment_recyclerview, container, false)
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)
        recycler_view.adapter = adapter


        if (::viewModel.isInitialized) {
            viewModel.records.observe(viewLifecycleOwner, Observer {

                adapter.submitList(it)
            })
        }



        floating_btn_add.setOnClickListener {
            DialogFragment().show(childFragmentManager, "")

        }
    }

}

ViewModel Factory

import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import java.lang.IllegalArgumentException

class DataFactoryRepository(private val dataRepository: DataRepository) :
    ViewModelProvider.NewInstanceFactory() {
    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
        if (modelClass.isAssignableFrom(DataViewModel::class.java)) {
            return DataViewModel(dataRepository) as T
        }
        throw IllegalArgumentException("ViewModel Class Not Created")
    }


}

Трассировка стека говорит следующее

2020-03-29 14:55:29.677 1752-2663/? E/GnssHAL_GnssInterface: gnssSvStatusCb: a: input svInfo.flags is 8
2020-03-29 14:55:29.677 1752-2663/? E/GnssHAL_GnssInterface: gnssSvStatusCb: b: input svInfo.flags is 8
2020-03-29 14:55:29.698 3031-3987/com.google.android.apps.nexuslauncher E/ActivityThread: Failed to find provider info for com.google.android.apps.wellbeing.api
2020-03-29 14:55:29.717 2122-2161/system_process E/system_server: Invalid ID 0x00000000.
2020-03-29 14:55:29.918 9371-9371/? E/storepaginatio: Unknown bits set in runtime_flags: 0x8000
2020-03-29 14:55:30.655 2122-2122/system_process E/LoadedApk: Unable to instantiate appComponentFactory
    java.lang.ClassNotFoundException: Didn't find class "androidx.core.app.CoreComponentFactory" on path: DexPathList[[],nativeLibraryDirectories=[/system/priv-app/GoogleSdkSetup/lib/x86, /system/lib, /system/product/lib, /system/lib, /system/product/lib]]
        at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:196)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
        at android.app.LoadedApk.createAppFactory(LoadedApk.java:256)
        at android.app.LoadedApk.updateApplicationInfo(LoadedApk.java:370)
        at android.app.ActivityThread.handleDispatchPackageBroadcast(ActivityThread.java:5951)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1941)
        at android.os.Handler.dispatchMessage(Handler.java:107)
        at android.os.Looper.loop(Looper.java:214)
        at com.android.server.SystemServer.run(SystemServer.java:541)
        at com.android.server.SystemServer.main(SystemServer.java:349)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:908)
2020-03-29 14:55:30.674 1752-2663/? E/GnssHAL_GnssInterface: gnssSvStatusCb: a: input svInfo.flags is 8
2020-03-29 14:55:30.674 1752-2663/? E/GnssHAL_GnssInterface: gnssSvStatusCb: b: input svInfo.flags is 8
2020-03-29 14:55:30.842 3815-3858/com.google.android.googlequicksearchbox:search E/MicroDetectionWorker: Stale runnable..ignoring
2020-03-29 14:55:31.002 1779-1981/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
2020-03-29 14:55:31.002 1779-1981/? E/SurfaceFlinger: ro.sf.lcd_density must be defined as a build property

Приведенный выше код используется для реализации Paging Library + Firestore.