add navigation framework and implement it

albumlist/src/main/java/com/hako/albumlist/feature/AlbumlistFragment.kt

@@ -8,6 +8,7 @@ import androidx.fragment.app.Fragment
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.hako.albumlist.R
 import com.hako.albumlist.model.AlbumViewable
+import com.hako.albumlist.navigation.AlbumlistNavigation
 import com.hako.albumlist.viewmodel.AlbumlistViewmodel
 import com.hako.albumlist.widget.AlbumlistAdapter
 import com.hako.base.domain.network.RequestStatus
@@ -15,14 +16,19 @@ import com.hako.base.extensions.gone
 import com.hako.base.extensions.observeNonNull
 import com.hako.base.extensions.toast
 import com.hako.base.extensions.visible
+import com.hako.base.navigation.NavigationRouter
 import kotlinx.android.synthetic.main.fragment_albumlist.*
+import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import timber.log.Timber
 
+const val ALBUMLIST_FRAGMENT_BUNDLE_USER_ID = "ALBUMLIST_FRAGMENT_BUNDLE_USER_ID"
+
 class AlbumlistFragment : Fragment() {
 
     private val viewModel: AlbumlistViewmodel by viewModel()
     private val listAdapter by lazy { AlbumlistAdapter() }
+    private val navigation: NavigationRouter by inject()
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
@@ -32,8 +38,12 @@ class AlbumlistFragment : Fragment() {
         super.onViewCreated(view, savedInstanceState)
         setRecycler()
         setObservers()
-        // TODO: Get user by bundle
-        viewModel.fetchAlbums(2)
+        doRequest()
+    }
+
+    private fun doRequest() {
+        arguments?.getInt(ALBUMLIST_FRAGMENT_BUNDLE_USER_ID)?.let { viewModel.fetchAlbums(it) } ?:
+        throw UninitializedPropertyAccessException("The UserId is expected but it wasn't provided")
     }
 
     private fun setObservers() {
@@ -72,7 +82,7 @@ class AlbumlistFragment : Fragment() {
             layoutManager = LinearLayoutManager(context)
             adapter = listAdapter.apply {
                 onItemClick = {
-                    context.toast(it.title)
+                    navigation.sendNavigation(AlbumlistNavigation.ClickedOnAlbum(it.id))
                 }
             }
         }

albumlist/src/main/java/com/hako/albumlist/navigation/AlbumlistNavigation.kt

@@ -0,0 +1,7 @@
+package com.hako.albumlist.navigation
+
+import com.hako.base.navigation.NavigationEvent
+
+sealed class AlbumlistNavigation : NavigationEvent {
+    data class ClickedOnAlbum(val albumId: Int) : AlbumlistNavigation()
+}

app/src/main/AndroidManifest.xml

@@ -15,6 +15,7 @@
 
         <activity
             android:name=".view.MainActivity"
+            android:launchMode="singleTask"
             android:screenOrientation="portrait">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

app/src/main/java/com/hako/friendlists/di/AppModules.kt

@@ -3,8 +3,11 @@ package com.hako.friendlists.di
 import androidx.room.Room
 import com.hako.base.domain.database.DatabaseClient
 import com.hako.base.domain.network.RemoteClient
+import com.hako.base.navigation.NavigationRouter
 import com.hako.friendlists.BuildConfig
+import com.hako.friendlists.viewmodel.NavigationViewmodel
 import com.squareup.picasso.Picasso
+import org.koin.androidx.viewmodel.dsl.viewModel
 import org.koin.dsl.module
 
 val appModules = module {
@@ -19,4 +22,8 @@ val appModules = module {
 
     // Picasso
     single { Picasso.get() }
+
+    // Navigation
+    single { NavigationRouter() }
+    viewModel { NavigationViewmodel() }
 }

app/src/main/java/com/hako/friendlists/view/MainActivity.kt

@@ -3,20 +3,43 @@ package com.hako.friendlists.view
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.navigation.findNavController
+import com.hako.base.extensions.observeNonNull
+import com.hako.base.navigation.NavigationRouter
+import com.hako.friendlists.BuildConfig
 import com.hako.friendlists.R
+import com.hako.friendlists.viewmodel.NavigationViewmodel
+import com.squareup.picasso.Picasso
+import org.koin.android.ext.android.inject
+import org.koin.androidx.viewmodel.ext.android.viewModel
 
 class MainActivity : AppCompatActivity() {
 
     private val navController by lazy { findNavController(R.id.main_fragment_container) }
+    private val navRouter: NavigationRouter by inject()
+    private val picasso: Picasso by inject()
+    private val viewModel: NavigationViewmodel by viewModel()
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
         setupNavigation()
+        setupPicasso()
     }
 
     private fun setupNavigation() {
         navController.setGraph(R.navigation.main_navigation)
+        navRouter.setOnNavigationEvent {
+            viewModel.onNavigationEvent(it)
+        }
+        viewModel.navigate.observeNonNull(this) { pair ->
+            // Pair.first is a Navigation Id
+            // Pair.second is a Bundle
+            navController.navigate(pair.first, pair.second)
+        }
     }
 
+    private fun setupPicasso() {
+        // Show cache indicator on images just for debug builds
+        picasso.setIndicatorsEnabled(BuildConfig.DEBUG)
+    }
 }

app/src/main/java/com/hako/friendlists/viewmodel/NavigationViewmodel.kt

@@ -0,0 +1,46 @@
+package com.hako.friendlists.viewmodel
+
+import android.os.Bundle
+import androidx.annotation.IdRes
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import com.hako.albumlist.feature.ALBUMLIST_FRAGMENT_BUNDLE_USER_ID
+import com.hako.albumlist.navigation.AlbumlistNavigation
+import com.hako.base.extensions.buildNavigation
+import com.hako.base.navigation.NavigationEvent
+import com.hako.friendlists.R
+import com.hako.photolist.feature.PHOTOLIST_FRAGMENT_BUNDLE_ALBUM_ID
+import com.hako.userlist.navigation.UserlistNavigation
+
+class NavigationViewmodel : ViewModel() {
+
+    val navigate = MutableLiveData<Pair<@IdRes Int, Bundle>>()
+
+    fun onNavigationEvent(event: NavigationEvent) {
+        when (event) {
+            is UserlistNavigation -> handleUserlistNavigation(event)
+            is AlbumlistNavigation -> handleAlbumlistNavigation(event)
+            else -> throw NoWhenBranchMatchedException("Undefined navigation event parent")
+        }
+    }
+
+    private fun handleUserlistNavigation(event: UserlistNavigation) {
+        when (event) {
+            is UserlistNavigation.ClickedOnUser -> navigate.postValue(
+                buildNavigation(R.id.action_userlistFragment_to_albumlistFragment, Bundle().apply {
+                    putInt(ALBUMLIST_FRAGMENT_BUNDLE_USER_ID, event.userId)
+                })
+            )
+        }
+    }
+
+    private fun handleAlbumlistNavigation(event: AlbumlistNavigation) {
+        when (event) {
+            is AlbumlistNavigation.ClickedOnAlbum -> navigate.postValue(
+                buildNavigation(R.id.action_albumlistFragment_to_photolistFragment, Bundle().apply {
+                    putInt(PHOTOLIST_FRAGMENT_BUNDLE_ALBUM_ID, event.albumId)
+                })
+            )
+        }
+    }
+}

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

@@ -2,11 +2,25 @@
 <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/photolist_navigation">
+    app:startDestination="@id/userlist_navigation">
 
     <include app:graph="@navigation/userlist_navigation" />
+    <action
+        android:id="@+id/action_userlistFragment_to_albumlistFragment"
+        app:destination="@id/albumlist_navigation"
+        app:enterAnim="@anim/slide_in_right"
+        app:exitAnim="@anim/slide_out_left"
+        app:popEnterAnim="@anim/slide_in_left"
+        app:popExitAnim="@anim/slide_out_right"/>
 
     <include app:graph="@navigation/albumlist_navigation" />
+    <action
+        android:id="@+id/action_albumlistFragment_to_photolistFragment"
+        app:destination="@id/photolist_navigation"
+        app:enterAnim="@anim/slide_in_right"
+        app:exitAnim="@anim/slide_out_left"
+        app:popEnterAnim="@anim/slide_in_left"
+        app:popExitAnim="@anim/slide_out_right"/>
 
     <include app:graph="@navigation/photolist_navigation" />
 

base/src/main/java/com/hako/base/extensions/ListExtensions.kt

@@ -1,23 +0,0 @@
-package com.hako.base.extensions
-
-import androidx.recyclerview.widget.DiffUtil
-import androidx.recyclerview.widget.RecyclerView
-
-fun <T> RecyclerView.Adapter<*>.autoNotify(oldList: List<T>, newList: List<T>, compare: (T, T) -> Boolean) {
-    val diff = DiffUtil.calculateDiff(object : DiffUtil.Callback() {
-
-        override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
-            return compare(oldList[oldItemPosition], newList[newItemPosition])
-        }
-
-        override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
-            return oldList[oldItemPosition] == newList[newItemPosition]
-        }
-
-        override fun getOldListSize() = oldList.size
-
-        override fun getNewListSize() = newList.size
-    })
-
-    diff.dispatchUpdatesTo(this)
-}

base/src/main/java/com/hako/base/extensions/NavigationExtensions.kt

@@ -1,19 +1,6 @@
 package com.hako.base.extensions
 
+import android.os.Bundle
 import androidx.annotation.IdRes
-import androidx.appcompat.app.AppCompatActivity
-import androidx.fragment.app.Fragment
-import androidx.navigation.fragment.NavHostFragment
 
-fun AppCompatActivity.findNavHostFragment(@IdRes id: Int) =
-    supportFragmentManager.findFragmentById(id) as NavHostFragment
-
-fun Fragment.findNavHostFragment(@IdRes id: Int) =
-    childFragmentManager.findFragmentById(id) as NavHostFragment
-
-fun Fragment.findNavController(@IdRes id: Int) =
-    androidx.navigation.Navigation.findNavController(view?.findViewById(id) ?: viewNotFound(id, this))
-
-private fun viewNotFound(@IdRes id: Int, fragment: Fragment): Nothing = throw IllegalStateException(
-    "View ID $id at '${fragment::class.java.simpleName}' not found."
-)
+fun buildNavigation(@IdRes id: Int, bundle: Bundle = Bundle()) = Pair(id, bundle)

base/src/main/java/com/hako/base/extensions/ViewExtensions.kt

@@ -4,6 +4,8 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import androidx.annotation.LayoutRes
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
 
 fun View.enable() {
     isEnabled = true
@@ -37,3 +39,22 @@ fun ViewGroup.inflate(@LayoutRes layout: Int, attachToRoot: Boolean = false): Vi
     LayoutInflater
         .from(context)
         .inflate(layout, this, attachToRoot)
+
+fun <T> RecyclerView.Adapter<*>.autoNotify(oldList: List<T>, newList: List<T>, compare: (T, T) -> Boolean) {
+    val diff = DiffUtil.calculateDiff(object : DiffUtil.Callback() {
+
+        override fun areItemsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+            return compare(oldList[oldItemPosition], newList[newItemPosition])
+        }
+
+        override fun areContentsTheSame(oldItemPosition: Int, newItemPosition: Int): Boolean {
+            return oldList[oldItemPosition] == newList[newItemPosition]
+        }
+
+        override fun getOldListSize() = oldList.size
+
+        override fun getNewListSize() = newList.size
+    })
+
+    diff.dispatchUpdatesTo(this)
+}

base/src/main/java/com/hako/base/navigation/NavigationEvent.kt

@@ -0,0 +1,7 @@
+package com.hako.base.navigation
+
+interface NavigationEvent
+
+interface NavigationController {
+    fun sendNavigation(event: NavigationEvent)
+}

base/src/main/java/com/hako/base/navigation/NavigationRouter.kt

@@ -0,0 +1,13 @@
+package com.hako.base.navigation
+
+class NavigationRouter : NavigationController {
+    private var onNavigationEvent: (NavigationEvent) -> Unit = {}
+
+    override fun sendNavigation(event: NavigationEvent) {
+        onNavigationEvent(event)
+    }
+
+    fun setOnNavigationEvent(listener: (NavigationEvent) -> Unit) {
+        onNavigationEvent = listener
+    }
+}

base/src/main/res/anim/slide_in_left.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="-100%p" android:toXDelta="0"
+        android:duration="@android:integer/config_shortAnimTime"/>
+</set>

base/src/main/res/anim/slide_in_right.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="100%p" android:toXDelta="0"
+        android:duration="@android:integer/config_shortAnimTime"/>
+</set>

base/src/main/res/anim/slide_out_left.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="0" android:toXDelta="-100%p"
+        android:duration="@android:integer/config_shortAnimTime"/>
+</set>

base/src/main/res/anim/slide_out_right.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <translate android:fromXDelta="0" android:toXDelta="100%p"
+        android:duration="@android:integer/config_shortAnimTime"/>
+</set>

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

@@ -18,6 +18,8 @@ import kotlinx.android.synthetic.main.fragment_photolist.*
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import timber.log.Timber
 
+const val PHOTOLIST_FRAGMENT_BUNDLE_ALBUM_ID = "PHOTOLIST_FRAGMENT_BUNDLE_ALBUM_ID"
+
 class PhotolistFragment : Fragment() {
 
     private val viewModel: PhotolistViewmodel by viewModel()
@@ -31,8 +33,12 @@ class PhotolistFragment : Fragment() {
         super.onViewCreated(view, savedInstanceState)
         setRecycler()
         setObservers()
-        // TODO: Get album by bundle
-        viewModel.fetchPhotos(1)
+        doRequest()
+    }
+
+    private fun doRequest() {
+        arguments?.getInt(PHOTOLIST_FRAGMENT_BUNDLE_ALBUM_ID)?.let { viewModel.fetchPhotos(it) } ?:
+        throw UninitializedPropertyAccessException("The AlbumId is expected but it wasn't provided")
     }
 
     private fun setObservers() {

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

@@ -47,10 +47,6 @@ class PhotoViewHolder(private val view: View) :
 
     private val picasso: Picasso by inject()
 
-    init {
-        picasso.setIndicatorsEnabled(true)
-    }
-
     fun bind(photo: PhotoViewable) = with(view) {
         picasso.load(photo.photoUrl)
             .placeholder(R.drawable.img_photo_placeholder)

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

@@ -35,9 +35,11 @@
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_marginStart="24dp"
-            android:layout_marginTop="16dp"
+            android:layout_marginTop="12dp"
             android:layout_marginEnd="24dp"
             android:ellipsize="end"
+            android:gravity="center_vertical"
+            android:lines="2"
             android:textSize="18sp"
             android:textStyle="bold"
             app:layout_constraintEnd_toEndOf="parent"

userlist/src/main/java/com/hako/userlist/feature/UserlistFragment.kt

@@ -11,11 +11,14 @@ import com.hako.base.extensions.gone
 import com.hako.base.extensions.observeNonNull
 import com.hako.base.extensions.toast
 import com.hako.base.extensions.visible
+import com.hako.base.navigation.NavigationRouter
 import com.hako.userlist.model.UserViewable
 import com.hako.userlist.viewmodel.UserlistViewmodel
 import com.hako.userlist.widget.UserlistAdapter
 import com.hako.friendlist_userlist.R
+import com.hako.userlist.navigation.UserlistNavigation
 import kotlinx.android.synthetic.main.fragment_userlist.*
+import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import timber.log.Timber
 
@@ -23,6 +26,7 @@ class UserlistFragment : Fragment() {
 
     private val viewModel: UserlistViewmodel by viewModel()
     private val listAdapter by lazy { UserlistAdapter() }
+    private val navigation: NavigationRouter by inject()
 
     override fun onCreateView(
         inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?
@@ -71,7 +75,7 @@ class UserlistFragment : Fragment() {
             layoutManager = LinearLayoutManager(context)
             adapter = listAdapter.apply {
                 onItemClick = {
-                    context.toast(it.realName)
+                    navigation.sendNavigation(UserlistNavigation.ClickedOnUser(it.id))
                 }
 
                 onFavoriteClick = {

userlist/src/main/java/com/hako/userlist/navigation/UserlistNavigation.kt

@@ -0,0 +1,7 @@
+package com.hako.userlist.navigation
+
+import com.hako.base.navigation.NavigationEvent
+
+sealed class UserlistNavigation : NavigationEvent {
+    data class ClickedOnUser(val userId: Int) : UserlistNavigation()
+}

userlist/src/main/res/layout/item_user_card.xml

@@ -17,7 +17,7 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="24dp"
-        android:layout_marginTop="16dp"
+        android:layout_marginTop="12dp"
         android:textSize="18sp"
         android:textStyle="bold"
         app:layout_constraintStart_toStartOf="parent"