From 38a3183b9d86ff48adcd6a30cef9f1f0989d381f Mon Sep 17 00:00:00 2001
From: Hugh Daschbach <hugh@ccss.com>
Date: Thu, 25 Aug 2022 04:21:04 -0700
Subject: [PATCH] Resolve warning: FragmentPagerAdapter deprecated.

Replace FragmentPagerAdapter with FragmentStateAdapter in
BrowseTabsAdapter.kt.  Refactored getPageTitle as a function that
returns tab name.  Tab text update moved to BrowseFragment.

This requires replacement of setupWithViewPager with
TabMediator.attach in BrowseFragment.

Also requires replacing widget declaration
androidx.viewpager.widget.ViewPager with
androidx.viewpager2.widget.ViewPager2 in fragment_browwse.xml.
---
 .../funkwhale/ffa/adapters/BrowseTabsAdapter.kt     | 13 ++++++-------
 .../audio/funkwhale/ffa/fragments/BrowseFragment.kt |  7 +++++--
 app/src/main/res/layout/fragment_browse.xml         |  2 +-
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/app/src/main/java/audio/funkwhale/ffa/adapters/BrowseTabsAdapter.kt b/app/src/main/java/audio/funkwhale/ffa/adapters/BrowseTabsAdapter.kt
index 272f24f..b8cb5ba 100644
--- a/app/src/main/java/audio/funkwhale/ffa/adapters/BrowseTabsAdapter.kt
+++ b/app/src/main/java/audio/funkwhale/ffa/adapters/BrowseTabsAdapter.kt
@@ -1,8 +1,7 @@
 package audio.funkwhale.ffa.adapters
 
 import androidx.fragment.app.Fragment
-import androidx.fragment.app.FragmentManager
-import androidx.fragment.app.FragmentPagerAdapter
+import androidx.viewpager2.adapter.FragmentStateAdapter
 import audio.funkwhale.ffa.R
 import audio.funkwhale.ffa.fragments.AlbumsGridFragment
 import audio.funkwhale.ffa.fragments.ArtistsFragment
@@ -10,13 +9,13 @@ import audio.funkwhale.ffa.fragments.FavoritesFragment
 import audio.funkwhale.ffa.fragments.PlaylistsFragment
 import audio.funkwhale.ffa.fragments.RadiosFragment
 
-class BrowseTabsAdapter(val context: Fragment, manager: FragmentManager) :
-  FragmentPagerAdapter(manager, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
+class BrowseTabsAdapter(val context: Fragment) :
+  FragmentStateAdapter(context) {
   var tabs = mutableListOf<Fragment>()
 
-  override fun getCount() = 5
+  override fun getItemCount() = 5
 
-  override fun getItem(position: Int): Fragment {
+  override fun createFragment(position: Int): Fragment {
     tabs.getOrNull(position)?.let {
       return it
     }
@@ -35,7 +34,7 @@ class BrowseTabsAdapter(val context: Fragment, manager: FragmentManager) :
     return fragment
   }
 
-  override fun getPageTitle(position: Int): String {
+  fun tabText(position: Int): String {
     return when (position) {
       0 -> context.getString(R.string.artists)
       1 -> context.getString(R.string.albums)
diff --git a/app/src/main/java/audio/funkwhale/ffa/fragments/BrowseFragment.kt b/app/src/main/java/audio/funkwhale/ffa/fragments/BrowseFragment.kt
index f0a78a1..996c622 100644
--- a/app/src/main/java/audio/funkwhale/ffa/fragments/BrowseFragment.kt
+++ b/app/src/main/java/audio/funkwhale/ffa/fragments/BrowseFragment.kt
@@ -7,6 +7,7 @@ import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import audio.funkwhale.ffa.adapters.BrowseTabsAdapter
 import audio.funkwhale.ffa.databinding.FragmentBrowseBinding
+import com.google.android.material.tabs.TabLayoutMediator
 
 class BrowseFragment : Fragment() {
 
@@ -17,7 +18,7 @@ class BrowseFragment : Fragment() {
 
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
-    adapter = BrowseTabsAdapter(this, childFragmentManager)
+    adapter = BrowseTabsAdapter(this)
   }
 
   override fun onCreateView(
@@ -27,11 +28,13 @@ class BrowseFragment : Fragment() {
   ): View {
     _binding = FragmentBrowseBinding.inflate(inflater)
     return binding.root.apply {
-      binding.tabs.setupWithViewPager(binding.pager)
       binding.tabs.getTabAt(0)?.select()
 
       binding.pager.adapter = adapter
       binding.pager.offscreenPageLimit = 3
+      TabLayoutMediator(binding.tabs, binding.pager) { tab, position ->
+        tab.text = adapter?.tabText(position)
+      }.attach()
     }
   }
 
diff --git a/app/src/main/res/layout/fragment_browse.xml b/app/src/main/res/layout/fragment_browse.xml
index b58b4d1..afc7ccb 100644
--- a/app/src/main/res/layout/fragment_browse.xml
+++ b/app/src/main/res/layout/fragment_browse.xml
@@ -17,7 +17,7 @@
         app:tabSelectedTextColor="@color/controlColor"
         app:tabTextColor="@color/colorPrimary" />
 
-    <androidx.viewpager.widget.ViewPager
+    <androidx.viewpager2.widget.ViewPager2
         android:id="@+id/pager"
         android:layout_width="match_parent"
         android:layout_height="match_parent"