Issue #48: Use Navigation Component

build.gradle

@@ -5,10 +5,11 @@ buildscript {
         maven { url 'https://maven.fabric.io/public' }
     }
     dependencies {
-        classpath GradleDependencies.androidGradlePlugin
-        classpath KotlinDependencies.kotlinGradlePlugin
-        classpath SupportDependencies.googleService
-        classpath SupportDependencies.fabricTools
+        classpath ClasspathDependencies.androidGradlePlugin
+        classpath ClasspathDependencies.kotlinGradlePlugin
+        classpath ClasspathDependencies.googleService
+        classpath ClasspathDependencies.fabricTools
+        classpath ClasspathDependencies.safeArgs
     }
 }
 

buildSrc/src/main/java/Dependencies.kt

@@ -22,22 +22,31 @@ object Versions {
     internal const val testJunit = "1.1.1"
     internal const val robolectric = "4.3.1"
     internal const val coroutinesTest = "1.2.1"
-    internal const val lifecycleVersion = "2.1.0"
     internal const val firebaseAnalytics = "17.2.0"
     internal const val crashlytics = "2.10.1"
     internal const val googleService = "4.3.2"
     internal const val fabricTools = "1.31.2"
     internal const val materialVersion = "1.0.0"
     internal const val cardView = "28.0.0"
     internal const val roomVersion = "2.2.3"
-}
 
-object GradleDependencies {
-    const val androidGradlePlugin = "com.android.tools.build:gradle:${Versions.androidGradlePlugin}"
+    // Jetpack
+    internal const val lifecycleVersion = "2.1.0"
+    internal const val navigationVersion = "2.1.0"
 }
 
 object JetPackDependencies {
     const val lifecycle = "androidx.lifecycle:lifecycle-extensions:${Versions.lifecycleVersion}"
+    const val navigationFragment = "androidx.navigation:navigation-fragment-ktx:${Versions.navigationVersion}"
+    const val navigationUi = "androidx.navigation:navigation-ui-ktx:${Versions.navigationVersion}"
+}
+
+object ClasspathDependencies {
+    const val androidGradlePlugin = "com.android.tools.build:gradle:${Versions.androidGradlePlugin}"
+    const val fabricTools = "io.fabric.tools:gradle:${Versions.fabricTools}"
+    const val googleService = "com.google.gms:google-services:${Versions.googleService}"
+    const val kotlinGradlePlugin = "org.jetbrains.kotlin:kotlin-gradle-plugin:${Versions.kotlin}"
+    const val safeArgs = "androidx.navigation:navigation-safe-args-gradle-plugin:${Versions.navigationVersion}"
 }
 
 object SupportDependencies {
@@ -49,13 +58,10 @@ object SupportDependencies {
     const val cardView = "com.android.support:cardview-v7:${Versions.cardView}"
     const val firebaseAnalytics = "com.google.firebase:firebase-analytics:${Versions.firebaseAnalytics}"
     const val crashlytics = "com.crashlytics.sdk.android:crashlytics:${Versions.crashlytics}"
-    const val fabricTools = "io.fabric.tools:gradle:${Versions.fabricTools}"
-    const val googleService = "com.google.gms:google-services:${Versions.googleService}"
 }
 
 object KotlinDependencies {
     const val kotlinStdLib = "org.jetbrains.kotlin:kotlin-stdlib-jdk7:${Versions.kotlin}"
-    const val kotlinGradlePlugin = "org.jetbrains.kotlin:kotlin-gradle-plugin:${Versions.kotlin}"
     const val coroutines = "org.jetbrains.kotlinx:kotlinx-coroutines-android:${Versions.coroutines}"
 }
 

presentation/build.gradle

@@ -3,6 +3,7 @@ apply plugin: 'com.google.gms.google-services'
 apply plugin: 'io.fabric'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
+apply plugin: "androidx.navigation.safeargs.kotlin"
 apply from: "$rootDir/detekt.gradle"
 
 android {
@@ -23,16 +24,28 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
 }
 
 dependencies {
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     implementation project(":domain")
     implementation project(":data")
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
     implementation KotlinDependencies.kotlinStdLib
 
     implementation JetPackDependencies.lifecycle
+    implementation JetPackDependencies.navigationFragment
+    implementation JetPackDependencies.navigationUi
 
     implementation SupportDependencies.coreKtx
     implementation SupportDependencies.appCompat

presentation/src/main/AndroidManifest.xml

@@ -15,17 +15,13 @@
         android:theme="@style/AppTheme"
         tools:ignore="AllowBackup,GoogleAppIndexingWarning">
 
-        <activity android:name=".splash.SplashActivity">
+        <activity android:name=".common.StartingNavHostActivity">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-        <activity android:name=".comics.ComicsActivity" />
-        <activity android:name=".categories.CategoriesActivity" />
-        <activity android:name=".characters.CharactersActivity" />
+
         <activity android:name=".characters.detail.CharactersDetailActivity" />
-        <activity android:name=".events.EventsActivity"/>
     </application>
-
 </manifest>

presentation/src/main/java/com/architect/coders/mu8/categories/CategoriesFragment.kt

@@ -0,0 +1,70 @@
+package com.architect.coders.mu8.categories
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import androidx.activity.OnBackPressedCallback
+import androidx.lifecycle.Observer
+import androidx.navigation.NavController
+import androidx.navigation.findNavController
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.architect.coders.mu8.R
+import com.architect.coders.mu8.common.NavigationFragment
+import com.architect.coders.mu8.common.StartingNavHostActivity
+import com.architect.coders.mu8.data.categories.CategoriesRepository
+import com.architect.coders.mu8.utils.getViewModel
+import com.architect.codes.mu8.utils.CHARACTERS
+import com.architect.codes.mu8.utils.COMICS
+import com.architect.codes.mu8.utils.EVENTS
+import com.architect.codes.mu8.utils.NOT_FOUND
+
+class CategoriesFragment : NavigationFragment() {
+
+    private lateinit var recycler: RecyclerView
+
+    private lateinit var viewModel: CategoriesViewModel
+    private lateinit var adapter: CategoriesAdapter
+
+    private lateinit var navigationController: NavController
+    private lateinit var callback: OnBackPressedCallback
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
+        return inflater.inflate(R.layout.fragment_list, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        val navHostActivity = activity as StartingNavHostActivity
+        navHostActivity.showToolbar()
+        navHostActivity.setToolbarTitle(getString(R.string.app_name))
+
+        navigationController = view.findNavController()
+
+        viewModel = getViewModel { CategoriesViewModel(CategoriesRepository()) }
+
+        adapter = CategoriesAdapter(viewModel::onCategoryClicked)
+
+        recycler = view.findViewById(R.id.recycler)
+        recycler.layoutManager = LinearLayoutManager(navHostActivity)
+        recycler.adapter = adapter
+
+        viewModel.model.observe(this, Observer(::updateUi))
+    }
+
+    private fun updateUi(model: CategoriesViewModel.UiModel) {
+        val context = this.context ?: return
+        when (model) {
+            is CategoriesViewModel.UiModel.Content -> adapter.categories = model.categories
+            is CategoriesViewModel.UiModel.Navigation -> {
+                when (model.categoryName) {
+                    CHARACTERS -> navigationController.navigate(R.id.action_categoriesFragment_to_charactersFragment)
+                    COMICS -> navigationController.navigate(R.id.action_categoriesFragment_to_comicsFragment)
+                    EVENTS -> navigationController.navigate(R.id.action_categoriesFragment_to_eventsFragment)
+                    else -> Toast.makeText(context, NOT_FOUND, Toast.LENGTH_SHORT).show()
+                }
+            }
+        }
+    }
+}