Use navigation

app/build.gradle

@@ -1,6 +1,7 @@
 plugins {
     id 'com.android.application'
     id 'kotlin-android'
+    id 'androidx.navigation.safeargs'
 }
 
 android {
@@ -34,6 +35,8 @@ android {
 }
 
 dependencies {
+    implementation 'androidx.navigation:navigation-fragment-ktx:2.3.5'
+    implementation 'androidx.navigation:navigation-ui-ktx:2.3.5'
     implementation 'androidx.appcompat:appcompat:1.3.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.0'
     implementation 'androidx.core:core-ktx:1.6.0'

app/src/main/java/com/causa_arcana/AppActivity.kt

@@ -2,22 +2,14 @@ package com.causa_arcana
 
 import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import androidx.navigation.findNavController
 
 class AppActivity : AppCompatActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_app)
-
-        val fragmentTransaction = supportFragmentManager.beginTransaction()
-        fragmentTransaction.replace(R.id.activity_main__frame, MainFragment() {
-            onArticlesListItemClick()
-        })
-        fragmentTransaction.commit()
     }
 
-    fun onArticlesListItemClick() {
-        val fragmentTransaction = supportFragmentManager.beginTransaction()
-        fragmentTransaction.replace(R.id.activity_main__frame, ArticleFragment())
-        fragmentTransaction.commit()
-    }
+    override fun onSupportNavigateUp(): Boolean =
+        findNavController(R.id.activity_app__nav).navigateUp()
 }

app/src/main/java/com/causa_arcana/MainFragment.kt

@@ -5,10 +5,11 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.navigation.fragment.findNavController
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 
-class MainFragment(private val onArticlesListItemClick: () -> Unit) : Fragment() {
+class MainFragment : Fragment() {
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
@@ -24,7 +25,11 @@ class MainFragment(private val onArticlesListItemClick: () -> Unit) : Fragment()
             view.findViewById(R.id.fragment_main__articles_list_rv)
         articlesListRecyclerView.layoutManager = LinearLayoutManager(requireContext())
         articlesListRecyclerView.adapter = ArticlesListRecyclerViewAdapter {
-            onArticlesListItemClick()
+            onArticleCardsListItemClick()
         }
     }
+
+    private fun onArticleCardsListItemClick() {
+        findNavController().navigate(R.id.action_open_article)
+    }
 }

app/src/main/res/layout/activity_app.xml

@@ -7,9 +7,12 @@
     android:layout_height="match_parent"
     tools:context=".AppActivity">
 
-    <FrameLayout
-        android:id="@+id/activity_main__frame"
+    <fragment
+        android:id="@+id/activity_app__nav"
+        android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"/>
+        android:layout_height="match_parent"
+        app:navGraph="@navigation/nav_graph"
+        app:defaultNavHost="true"/>
 
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -0,0 +1,22 @@
+<?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/nav_graph.xml"
+    app:startDestination="@id/mainFragment">
+
+    <fragment
+        android:id="@+id/mainFragment"
+        android:name="com.causa_arcana.MainFragment"
+        android:label="fragment_main"
+        tools:layout="@layout/fragment_main">
+        <action
+            android:id="@+id/action_open_article"
+            app:destination="@id/articleFragment"/>
+    </fragment>
+    <fragment
+        android:id="@+id/articleFragment"
+        android:name="com.causa_arcana.ArticleFragment"
+        android:label="fragment_article"
+        tools:layout="@layout/fragment_article"/>
+</navigation>

build.gradle

@@ -6,6 +6,7 @@ buildscript {
     }
 
     dependencies {
+        classpath 'androidx.navigation:navigation-safe-args-gradle-plugin:2.3.5'
         classpath "com.android.tools.build:gradle:7.0.0"
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.5.21"