create module and implement it

albumlist/src/main/java/com/hako/albumlist/domain/usecase/GetAlbum.kt

@@ -3,7 +3,7 @@ package com.hako.albumlist.domain.usecase
 import com.hako.albumlist.domain.datasource.AlbumlistRemoteApi
 import com.hako.albumlist.model.AlbumViewable
 import com.hako.albumlist.model.toAlbumEntity
-import com.hako.albumlist.model.toUserViewable
+import com.hako.albumlist.model.toAlbumViewable
 import com.hako.base.domain.database.dao.AlbumDao
 import io.reactivex.Single
 import io.reactivex.schedulers.Schedulers
@@ -28,13 +28,13 @@ class GetAlbum(private val dao: AlbumDao) : KoinComponent {
                     api.getAlbums(userId)
                         .doOnSuccess {
                             dao.saveAll(it.map { album -> album.toAlbumEntity() })
-                            onSuccess(dao.getAlbums(userId).map { album -> album.toUserViewable() })
+                            onSuccess(dao.getAlbums(userId).map { album -> album.toAlbumViewable() })
                         }
                         .doOnSubscribe { onLoading() }
                         .subscribeOn(Schedulers.io())
                         .subscribe({}, { onError(it) })
                 } else {
-                    onSuccess(dbAlbum.map { it.toUserViewable() })
+                    onSuccess(dbAlbum.map { it.toAlbumViewable() })
                 }
             }
             .subscribe()

albumlist/src/main/java/com/hako/albumlist/model/AlbumModels.kt

@@ -20,5 +20,5 @@ data class AlbumViewable(
 
 fun Album.toAlbumEntity() = AlbumEntity(this.id, this.userId, this.title)
 
-fun AlbumEntity.toUserViewable() = AlbumViewable(this.id, this.userId, this.title)
+fun AlbumEntity.toAlbumViewable() = AlbumViewable(this.id, this.userId, this.title)
 

albumlist/src/main/java/com/hako/albumlist/viewmodel/AlbumlistViewmodel.kt

@@ -17,10 +17,10 @@ class AlbumlistViewmodel : ViewModel(), KoinComponent {
     val data = MutableLiveData<Either<Throwable, List<AlbumViewable>>>()
     val requestStatus = MutableLiveData<RequestStatus>()
 
-    private val getUsers: GetAlbum = get()
+    private val getAlbum: GetAlbum = get()
 
     fun fetchAlbums(userId: Int) {
-        getUsers.execute(
+        getAlbum.execute(
             userId,
             onSuccess = {
                 requestStatus.postValue(Ready)

albumlist/src/main/java/com/hako/albumlist/widget/AlbumlistAdapter.kt

@@ -20,7 +20,7 @@ class AlbumlistAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
     var onItemClick: (AlbumViewable) -> Unit = { }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder =
-        UserViewHolder(
+        AlbumViewHolder(
             LayoutInflater
                 .from(parent.context)
                 .inflate(R.layout.item_album_card, parent, false),
@@ -37,12 +37,12 @@ class AlbumlistAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
 
     override fun onBindViewHolder(viewholder: RecyclerView.ViewHolder, position: Int) =
         when (viewholder) {
-            is UserViewHolder -> viewholder.bind(items[position])
+            is AlbumViewHolder -> viewholder.bind(items[position])
             else -> throw NoWhenBranchMatchedException("Undefined viewholder")
         }
 }
 
-class UserViewHolder(private val view: View,
+class AlbumViewHolder(private val view: View,
                      private val onItemClick: (AlbumViewable) -> Unit) :
     RecyclerView.ViewHolder(view) {
 

albumlist/src/main/res/layout/item_album_card.xml

@@ -14,12 +14,15 @@
 
     <TextView
         android:id="@+id/item_album_card_album_name"
-        android:layout_width="wrap_content"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginStart="24dp"
         android:layout_marginTop="16dp"
+        android:layout_marginEnd="24dp"
+        android:ellipsize="end"
         android:textSize="18sp"
         android:textStyle="bold"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
         tools:text="Album name" />

albumlist/src/main/res/navigation/albumlist_navigation.xml

@@ -9,6 +9,6 @@
         android:id="@+id/albumlistFragment"
         android:name="com.hako.albumlist.feature.AlbumlistFragment"
         tools:layout="@layout/fragment_albumlist"
-        android:label="AlbumListFragment" />
+        android:label="AlbumlistFragment" />
 
 </navigation>

app/build.gradle

@@ -50,4 +50,5 @@ dependencies {
     implementation project(":base")
     implementation project(":userlist")
     implementation project(":albumlist")
+    implementation project(":photolist")
 }

app/src/main/java/com/hako/friendlists/MainApplication.kt

@@ -4,6 +4,7 @@ import android.app.Application
 import com.hako.albumlist.di.albumListModules
 import com.hako.userlist.di.userlistModules
 import com.hako.friendlists.di.appModules
+import com.hako.photolist.di.photoListModules
 import org.koin.android.ext.koin.androidContext
 import org.koin.core.context.startKoin
 import timber.log.Timber
@@ -28,7 +29,8 @@ class MainApplication : Application() {
                 listOf(
                     appModules,
                     userlistModules,
-                    albumListModules
+                    albumListModules,
+                    photoListModules
                 )
             )
         }

app/src/main/res/navigation/main_navigation.xml

@@ -2,10 +2,12 @@
 <navigation xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/main_navigation"
-    app:startDestination="@id/userlist_navigation">
+    app:startDestination="@id/photolist_navigation">
 
     <include app:graph="@navigation/userlist_navigation" />
 
     <include app:graph="@navigation/albumlist_navigation" />
 
+    <include app:graph="@navigation/photolist_navigation" />
+
 </navigation>

base/src/androidTest/java/com/hako/base/ExampleInstrumentedTest.kt

@@ -1,24 +0,0 @@
-package com.hako.base
-
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.ext.junit.runners.AndroidJUnit4
-
-import org.junit.Test
-import org.junit.runner.RunWith
-
-import org.junit.Assert.*
-
-/**
- * Instrumented test, which will execute on an Android device.
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-@RunWith(AndroidJUnit4::class)
-class ExampleInstrumentedTest {
-    @Test
-    fun useAppContext() {
-        // Context of the app under test.
-        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
-        assertEquals("com.hako.base.test", appContext.packageName)
-    }
-}

base/src/main/java/com/hako/base/domain/database/dao/PhotoDao.kt

@@ -18,6 +18,9 @@ interface PhotoDao {
     @get:Query("SELECT * FROM ${PhotoEntity.TABLE_NAME}")
     val all: List<PhotoEntity>
 
+    @Query("SELECT * FROM ${PhotoEntity.TABLE_NAME} WHERE albumId = :albumId ORDER BY id ASC")
+    fun getPhotos(albumId: Int): List<PhotoEntity>
+
     @Query("SELECT COUNT(*) FROM ${PhotoEntity.TABLE_NAME}")
     fun count(): Int
 

base/src/test/java/com/hako/base/ExampleUnitTest.kt

@@ -1,17 +0,0 @@
-package com.hako.base
-
-import org.junit.Test
-
-import org.junit.Assert.*
-
-/**
- * Example local unit test, which will execute on the development machine (host).
- *
- * See [testing documentation](http://d.android.com/tools/testing).
- */
-class ExampleUnitTest {
-    @Test
-    fun addition_isCorrect() {
-        assertEquals(4, 2 + 2)
-    }
-}

photolist/.gitignore

@@ -0,0 +1 @@
+/build

photolist/build.gradle

@@ -0,0 +1,6 @@
+apply plugin: 'com.android.library'
+apply from: '../core.gradle'
+
+dependencies {
+    implementation project(':base')
+}

photolist/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

photolist/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.hako.photolist" />

photolist/src/main/java/com/hako/photolist/di/PhotolistModules.kt

@@ -0,0 +1,15 @@
+package com.hako.photolist.di
+
+import com.hako.base.domain.network.RemoteClient
+import com.hako.photolist.domain.datasource.PhotolistRemoteApi
+import com.hako.photolist.domain.usecase.GetPhoto
+import com.hako.photolist.viewmodel.PhotolistViewmodel
+import org.koin.androidx.viewmodel.dsl.viewModel
+import org.koin.dsl.module
+
+val photoListModules = module {
+    factory { get<RemoteClient>().getClient(PhotolistRemoteApi::class.java) }
+    factory { GetPhoto(get()) }
+
+    viewModel { PhotolistViewmodel() }
+}

photolist/src/main/java/com/hako/photolist/domain/datasource/PhotolistRemoteApi.kt

@@ -0,0 +1,14 @@
+package com.hako.photolist.domain.datasource
+
+import com.hako.photolist.model.Photo
+import io.reactivex.Single
+import retrofit2.http.GET
+import retrofit2.http.Query
+
+interface PhotolistRemoteApi {
+
+    @GET("/photos")
+    fun getPhotos(
+        @Query("albumId") albumId: Int
+    ): Single<List<Photo>>
+}

photolist/src/main/java/com/hako/photolist/domain/usecase/GetPhoto.kt

@@ -0,0 +1,40 @@
+package com.hako.photolist.domain.usecase
+
+import com.hako.base.domain.database.dao.PhotoDao
+import com.hako.photolist.domain.datasource.PhotolistRemoteApi
+import com.hako.photolist.model.*
+import io.reactivex.Single
+import io.reactivex.schedulers.Schedulers
+import org.koin.core.KoinComponent
+import org.koin.core.get
+
+class GetPhoto(private val dao: PhotoDao) : KoinComponent {
+
+    private val api: PhotolistRemoteApi = get()
+
+    fun execute(
+        albumId: Int,
+        onSuccess: (List<PhotoViewable>) -> Unit,
+        onError: (Throwable) -> Unit,
+        onLoading: () -> Unit
+    ) {
+        Single.fromCallable { dao.getPhotos(albumId) }
+            .subscribeOn(Schedulers.io())
+            .doOnError { onError(it) }
+            .doOnSuccess { dbAlbum ->
+                if (dbAlbum.isEmpty() || dbAlbum.count() == 0) {
+                    api.getPhotos(albumId)
+                        .doOnSuccess {
+                            dao.saveAll(it.map { album -> album.toPhotoEntity() })
+                            onSuccess(dao.getPhotos(albumId).map { album -> album.toPhotoViewable() })
+                        }
+                        .doOnSubscribe { onLoading() }
+                        .subscribeOn(Schedulers.io())
+                        .subscribe({}, { onError(it) })
+                } else {
+                    onSuccess(dbAlbum.map { it.toPhotoViewable() })
+                }
+            }
+            .subscribe()
+    }
+}

photolist/src/main/java/com/hako/photolist/feature/PhotolistFragment.kt

@@ -0,0 +1,75 @@
+package com.hako.photolist.feature
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import androidx.recyclerview.widget.LinearLayoutManager
+import com.hako.base.domain.network.RequestStatus
+import com.hako.base.extensions.gone
+import com.hako.base.extensions.observeNonNull
+import com.hako.base.extensions.visible
+import com.hako.photolist.R
+import com.hako.photolist.model.PhotoViewable
+import com.hako.photolist.viewmodel.PhotolistViewmodel
+import com.hako.photolist.widget.PhotolistAdapter
+import kotlinx.android.synthetic.main.fragment_photolist.*
+import org.koin.androidx.viewmodel.ext.android.viewModel
+import timber.log.Timber
+
+class PhotolistFragment : Fragment() {
+
+    private val viewModel: PhotolistViewmodel by viewModel()
+    private val listAdapter by lazy { PhotolistAdapter() }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
+    ): View = inflater.inflate(R.layout.fragment_photolist, container, false)
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        setRecycler()
+        setObservers()
+        // TODO: Get album by bundle
+        viewModel.fetchPhotos(2)
+    }
+
+    private fun setObservers() {
+        viewModel.data.observeNonNull(this) {
+            it.either(::handleFetchError, ::handleFetchSuccess)
+        }
+
+        viewModel.requestStatus.observeNonNull(this) {
+            when (it) {
+                RequestStatus.Ready -> {
+                    fragment_photolist_error_overlay.gone()
+                    fragment_photolist_loading_overlay.gone()
+                }
+                RequestStatus.Loading -> {
+                    fragment_photolist_error_overlay.gone()
+                    fragment_photolist_loading_overlay.visible()
+                }
+                RequestStatus.Errored -> {
+                    fragment_photolist_error_overlay.visible()
+                    fragment_photolist_loading_overlay.gone()
+                }
+            }
+        }
+    }
+
+    private fun handleFetchError(throwable: Throwable) {
+        Timber.e(throwable)
+    }
+
+    private fun handleFetchSuccess(photos: List<PhotoViewable>) {
+        listAdapter.addAll(photos)
+    }
+
+    private fun setRecycler() {
+        fragment_photolist_recycler_container.apply {
+            layoutManager = LinearLayoutManager(context)
+            adapter = listAdapter
+        }
+    }
+}

photolist/src/main/java/com/hako/photolist/model/PhotoModels.kt

@@ -0,0 +1,27 @@
+package com.hako.photolist.model
+
+import android.os.Parcelable
+import com.google.gson.annotations.SerializedName
+import com.hako.base.domain.database.entities.PhotoEntity
+import kotlinx.android.parcel.Parcelize
+
+@Parcelize
+data class Photo(
+    @SerializedName("id") val id: Int,
+    @SerializedName("albumId") val albumId: Int,
+    @SerializedName("title") val title: String,
+    @SerializedName("url") val photoUrl: String,
+    @SerializedName("thumbnailUrl") val thumbnailUrl: String
+) : Parcelable
+
+data class PhotoViewable(
+    val id: Int,
+    val albumId: Int,
+    val title: String,
+    val photoUrl: String
+)
+
+fun Photo.toPhotoEntity() = PhotoEntity(this.id, this.albumId, this.title, this.photoUrl, this.thumbnailUrl)
+
+fun PhotoEntity.toPhotoViewable() = PhotoViewable(this.id, this.albumId, this.title, this.photoUrl)
+

photolist/src/main/java/com/hako/photolist/viewmodel/PhotolistViewmodel.kt

@@ -0,0 +1,37 @@
+package com.hako.photolist.viewmodel
+
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import com.hako.base.domain.network.RequestStatus
+import com.hako.base.domain.network.RequestStatus.Ready
+import com.hako.base.domain.network.RequestStatus.Loading
+import com.hako.base.domain.network.RequestStatus.Errored
+import com.hako.base.domain.Either
+import com.hako.photolist.domain.usecase.GetPhoto
+import com.hako.photolist.model.PhotoViewable
+import org.koin.core.KoinComponent
+import org.koin.core.get
+
+class PhotolistViewmodel : ViewModel(), KoinComponent {
+
+    val data = MutableLiveData<Either<Throwable, List<PhotoViewable>>>()
+    val requestStatus = MutableLiveData<RequestStatus>()
+
+    private val getPhoto: GetPhoto = get()
+
+    fun fetchPhotos(albumId: Int) {
+        getPhoto.execute(
+            albumId,
+            onSuccess = {
+                requestStatus.postValue(Ready)
+                data.postValue(Either.Right(it))
+            },
+            onLoading = {
+                requestStatus.postValue(Loading)
+            },
+            onError = {
+                requestStatus.postValue(Errored)
+                data.postValue(Either.Left(it))
+            })
+    }
+}

photolist/src/main/java/com/hako/photolist/widget/PhotolistAdapter.kt

@@ -0,0 +1,50 @@
+package com.hako.photolist.widget
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.recyclerview.widget.RecyclerView
+import com.hako.base.extensions.autoNotify
+import com.hako.photolist.R
+import com.hako.photolist.model.PhotoViewable
+import kotlinx.android.synthetic.main.item_photo_card.view.*
+import kotlin.properties.Delegates
+
+class PhotolistAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
+
+    private var items by Delegates.observable(emptyList<PhotoViewable>()) { _, oldList, newList ->
+        autoNotify(oldList, newList) { old, new -> old.id == new.id }
+        notifyDataSetChanged()
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): RecyclerView.ViewHolder =
+        PhotoViewHolder(
+            LayoutInflater
+                .from(parent.context)
+                .inflate(R.layout.item_photo_card, parent, false)
+        )
+
+    fun getItem(position: Int) = items[position]
+
+    fun addAll(list: List<PhotoViewable>) {
+        items = list
+    }
+
+    override fun getItemCount() = items.size
+
+    override fun onBindViewHolder(viewholder: RecyclerView.ViewHolder, position: Int) =
+        when (viewholder) {
+            is PhotoViewHolder -> viewholder.bind(items[position])
+            else -> throw NoWhenBranchMatchedException("Undefined viewholder")
+        }
+}
+
+class PhotoViewHolder(private val view: View) :
+    RecyclerView.ViewHolder(view) {
+
+    fun bind(photo: PhotoViewable) = with(view) {
+        item_photo_card_title.text = photo.title
+
+        // TODO load image
+    }
+}

photolist/src/main/res/layout/fragment_photolist.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:id="@+id/fragment_photolist_base">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/fragment_photolist_recycler_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <com.hako.base.widgets.LoadingOverlay
+        android:id="@+id/fragment_photolist_loading_overlay"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <com.hako.base.widgets.NetworkErrorOverlay
+        android:id="@+id/fragment_photolist_error_overlay"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

photolist/src/main/res/layout/item_photo_card.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/item_photo_card_container"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_marginStart="8dp"
+    android:layout_marginTop="8dp"
+    android:layout_marginEnd="8dp"
+    android:background="@drawable/bg_card"
+    android:elevation="2dp"
+    android:orientation="vertical">
+
+    <ImageView
+        android:id="@+id/item_photo_card_photo"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:adjustViewBounds="true"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/img_photo_placeholder"
+        android:contentDescription="Album photo" />
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/item_photo_card_footer_container"
+        android:layout_width="match_parent"
+        android:layout_height="70dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/item_photo_card_photo">
+
+        <TextView
+            android:id="@+id/item_photo_card_title"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="24dp"
+            android:layout_marginTop="16dp"
+            android:layout_marginEnd="24dp"
+            android:ellipsize="end"
+            android:textSize="18sp"
+            android:textStyle="bold"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:text="Album name" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+
+</androidx.constraintlayout.widget.ConstraintLayout>

photolist/src/main/res/navigation/photolist_navigation.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/photolist_navigation"
+    app:startDestination="@id/photolistFragment">
+
+    <fragment
+        android:id="@+id/photolistFragment"
+        android:name="com.hako.photolist.feature.PhotolistFragment"
+        tools:layout="@layout/fragment_photolist"
+        android:label="PhotolistFragment" />
+
+</navigation>

photolist/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">photolist</string>
+</resources>

settings.gradle

@@ -1,2 +1,2 @@
-include ':app', ':base', ':userlist', ':albumlist'
+include ':app', ':base', ':userlist', ':albumlist', ':photolist'
 rootProject.name='Friendlists'

userlist/src/main/res/navigation/userlist_navigation.xml

@@ -3,12 +3,12 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/userlist_navigation"
-    app:startDestination="@id/userListFragment">
+    app:startDestination="@id/userlistFragment">
 
     <fragment
-        android:id="@+id/userListFragment"
+        android:id="@+id/userlistFragment"
         android:name="com.hako.userlist.feature.UserlistFragment"
         tools:layout="@layout/fragment_userlist"
-        android:label="UserListFragment" />
+        android:label="UserlistFragment" />
 
 </navigation>