Finally found a way to do proper animation

app/src/main/java/org/linphone/ui/MainActivity.kt

@@ -22,7 +22,6 @@ package org.linphone.ui
 import android.Manifest
 import android.content.pm.PackageManager
 import android.os.Bundle
-import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.content.ContextCompat
 import androidx.core.view.WindowCompat
@@ -110,12 +109,4 @@ class MainActivity : AppCompatActivity() {
     private fun getNavBar(): NavigationBarView? {
         return binding.mainNavView ?: binding.mainNavRail
     }
-
-    fun hideNavBar() {
-        binding.mainNavView?.visibility = View.GONE
-    }
-
-    fun showNavBar() {
-        binding.mainNavView?.visibility = View.VISIBLE
-    }
 }

app/src/main/java/org/linphone/ui/conversations/ConversationsFragment.kt

@@ -23,6 +23,8 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.animation.Animation
+import android.view.animation.AnimationUtils
 import androidx.core.view.doOnPreDraw
 import androidx.fragment.app.Fragment
 import androidx.navigation.fragment.findNavController
@@ -31,7 +33,6 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import org.linphone.R
 import org.linphone.databinding.ConversationsFragmentBinding
-import org.linphone.ui.MainActivity
 
 class ConversationsFragment : Fragment() {
     private lateinit var binding: ConversationsFragmentBinding
@@ -56,6 +57,10 @@ class ConversationsFragment : Fragment() {
         }
     }
 
+    override fun onCreateAnimation(transit: Int, enter: Boolean, nextAnim: Int): Animation? {
+        return AnimationUtils.loadAnimation(activity, R.anim.hold)
+    }
+
     override fun onDestroyView() {
         binding.conversationsList.adapter = null
         adapter.unregisterAdapterDataObserver(observer)
@@ -107,7 +112,6 @@ class ConversationsFragment : Fragment() {
 
             (view.parent as? ViewGroup)?.doOnPreDraw {
                 startPostponedEnterTransition()
-                (requireActivity() as MainActivity).showNavBar()
             }
         }
 

app/src/main/java/org/linphone/ui/conversations/NewConversationFragment.kt

@@ -30,7 +30,6 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import org.linphone.R
 import org.linphone.contacts.ContactsSelectionAdapter
 import org.linphone.databinding.NewConversationFragmentBinding
-import org.linphone.ui.MainActivity
 
 class NewConversationFragment : Fragment() {
     private lateinit var binding: NewConversationFragmentBinding
@@ -70,7 +69,6 @@ class NewConversationFragment : Fragment() {
 
             (view.parent as? ViewGroup)?.doOnPreDraw {
                 startPostponedEnterTransition()
-                (requireActivity() as MainActivity).hideNavBar()
             }
         }
 

app/src/main/res/anim/hold.xml

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

app/src/main/res/anim/slide_in.xml

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

app/src/main/res/anim/slide_out.xml

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

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

@@ -12,7 +12,10 @@
         tools:layout="@layout/conversations_fragment">
         <action
             android:id="@+id/action_conversationsFragment_to_newConversationFragment"
-            app:destination="@id/newConversationFragment" />
+            app:destination="@id/newConversationFragment"
+            app:enterAnim="@anim/slide_in"
+            app:launchSingleTop="true"
+            app:popExitAnim="@anim/slide_out" />
     </fragment>
 
     <fragment