refactor: rework RecyclerViews to set adapter once (#6971)

app/src/main/java/com/github/libretube/ui/activities/VideoTagsAdapter.kt

@@ -2,21 +2,29 @@ package com.github.libretube.ui.activities
 
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.databinding.VideoTagRowBinding
 import com.github.libretube.ui.viewholders.VideoTagsViewHolder
 
-class VideoTagsAdapter(private val tags: List<String>) :
+class VideoTagsAdapter :
-    RecyclerView.Adapter<VideoTagsViewHolder>() {
+    ListAdapter<String, VideoTagsViewHolder>(object : DiffUtil.ItemCallback<String>() {
+        override fun areItemsTheSame(oldItem: String, newItem: String): Boolean {
+            return oldItem == newItem
+        }
+
+        override fun areContentsTheSame(oldItem: String, newItem: String): Boolean {
+            return oldItem == newItem
+        }
+
+    }) {
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): VideoTagsViewHolder {
         val binding = VideoTagRowBinding.inflate(LayoutInflater.from(parent.context))
         return VideoTagsViewHolder(binding)
     }
 
-    override fun getItemCount() = tags.size
-
     override fun onBindViewHolder(holder: VideoTagsViewHolder, position: Int) {
-        val tag = tags[position]
+        val tag = getItem(holder.bindingAdapterPosition)
         holder.binding.apply {
             tagText.text = tag
             root.setOnClickListener {

app/src/main/java/com/github/libretube/ui/activities/WelcomeActivity.kt

@@ -47,13 +47,16 @@ class WelcomeActivity : BaseActivity() {
         val binding = ActivityWelcomeBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        // ALl the binding values are optional due to two different possible layouts (normal, landscape)
-        viewModel.instances.observe(this) { instances ->
         binding.instancesRecycler.layoutManager = LinearLayoutManager(this@WelcomeActivity)
-            binding.instancesRecycler.adapter = InstancesAdapter(ImmutableList.copyOf(instances), viewModel.selectedInstanceIndex.value) { index ->
+        val adapter = InstancesAdapter(viewModel.selectedInstanceIndex.value) { index ->
             viewModel.selectedInstanceIndex.value = index
             binding.okay.alpha = 1f
         }
+        binding.instancesRecycler.adapter = adapter
+
+        // ALl the binding values are optional due to two different possible layouts (normal, landscape)
+        viewModel.instances.observe(this) { instances ->
+            adapter.submitList(ImmutableList.copyOf(instances))
             binding.progress.isGone = true
         }
         viewModel.fetchInstances()

app/src/main/java/com/github/libretube/ui/adapters/AddChannelToGroupAdapter.kt

@@ -2,25 +2,35 @@ package com.github.libretube.ui.adapters
 
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.databinding.AddChannelToGroupRowBinding
 import com.github.libretube.db.obj.SubscriptionGroup
 import com.github.libretube.ui.viewholders.AddChannelToGroupViewHolder
 
 class AddChannelToGroupAdapter(
-    private val channelGroups: MutableList<SubscriptionGroup>,
     private val channelId: String
-) : RecyclerView.Adapter<AddChannelToGroupViewHolder>() {
+) : ListAdapter<SubscriptionGroup, AddChannelToGroupViewHolder>(object: DiffUtil.ItemCallback<SubscriptionGroup>() {
+    override fun areItemsTheSame(oldItem: SubscriptionGroup, newItem: SubscriptionGroup): Boolean {
+        return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(
+        oldItem: SubscriptionGroup,
+        newItem: SubscriptionGroup
+    ): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): AddChannelToGroupViewHolder {
         val layoutInflater = LayoutInflater.from(parent.context)
         val binding = AddChannelToGroupRowBinding.inflate(layoutInflater, parent, false)
         return AddChannelToGroupViewHolder(binding)
     }
 
-    override fun getItemCount() = channelGroups.size
-
     override fun onBindViewHolder(holder: AddChannelToGroupViewHolder, position: Int) {
-        val channelGroup = channelGroups[position]
+        val channelGroup = getItem(holder.bindingAdapterPosition)
 
         holder.binding.apply {
             groupName.text = channelGroup.name

app/src/main/java/com/github/libretube/ui/adapters/DownloadsAdapter.kt

@@ -9,7 +9,8 @@ import android.view.ViewGroup
 import androidx.core.os.bundleOf
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.R
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.VideoRowBinding
@@ -37,9 +38,21 @@ import kotlin.io.path.fileSize
 class DownloadsAdapter(
     private val context: Context,
     private val downloadTab: DownloadTab,
-    private val downloads: MutableList<DownloadWithItems>,
     private val toggleDownload: (DownloadWithItems) -> Boolean
-) : RecyclerView.Adapter<DownloadsViewHolder>() {
+) : ListAdapter<DownloadWithItems, DownloadsViewHolder>(object :
+    DiffUtil.ItemCallback<DownloadWithItems>() {
+    override fun areItemsTheSame(oldItem: DownloadWithItems, newItem: DownloadWithItems): Boolean {
+        return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(
+        oldItem: DownloadWithItems,
+        newItem: DownloadWithItems
+    ): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DownloadsViewHolder {
         val binding = VideoRowBinding.inflate(
             LayoutInflater.from(parent.context),
@@ -51,8 +64,8 @@ class DownloadsAdapter(
 
     @SuppressLint("SetTextI18n")
     override fun onBindViewHolder(holder: DownloadsViewHolder, position: Int) {
-        val download = downloads[position].download
+        val download = getItem(holder.bindingAdapterPosition).download
-        val items = downloads[position].downloadItems
+        val items = getItem(holder.bindingAdapterPosition).downloadItems
 
         holder.binding.apply {
             fileSize.isVisible = true
@@ -96,7 +109,7 @@ class DownloadsAdapter(
             }
 
             progressBar.setOnClickListener {
-                val isDownloading = toggleDownload(downloads[position])
+                val isDownloading = toggleDownload(getItem(holder.bindingAdapterPosition))
 
                 resumePauseBtn.setImageResource(
                     if (isDownloading) {
@@ -113,7 +126,11 @@ class DownloadsAdapter(
                     intent.putExtra(IntentData.videoId, download.videoId)
                     root.context.startActivity(intent)
                 } else {
-                    BackgroundHelper.playOnBackgroundOffline(root.context, download.videoId, downloadTab)
+                    BackgroundHelper.playOnBackgroundOffline(
+                        root.context,
+                        download.videoId,
+                        downloadTab
+                    )
                     NavigationHelper.openAudioPlayerFragment(root.context, offlinePlayer = true)
                 }
             }
@@ -152,11 +169,9 @@ class DownloadsAdapter(
             .show()
     }
 
-    fun itemAt(index: Int) = downloads[index]
-
     fun deleteDownload(position: Int) {
-        val download = downloads[position].download
+        val download = getItem(position).download
-        val items = downloads[position].downloadItems
+        val items = getItem(position).downloadItems
 
         items.forEach {
             it.path.deleteIfExists()
@@ -168,9 +183,9 @@ class DownloadsAdapter(
         runBlocking(Dispatchers.IO) {
             DatabaseHolder.Database.downloadDao().deleteDownload(download)
         }
-        downloads.removeAt(position)
+        submitList(currentList.toMutableList().also {
-        notifyItemRemoved(position)
+            it.removeAt(position)
-        notifyItemRangeChanged(position, itemCount)
+        })
     }
 
     fun restoreItem(position: Int) {
@@ -178,6 +193,4 @@ class DownloadsAdapter(
         notifyItemRemoved(position)
         notifyItemInserted(position)
     }
-
-    override fun getItemCount() = downloads.size
 }

app/src/main/java/com/github/libretube/ui/adapters/InstancesAdapter.kt

@@ -3,18 +3,26 @@ package com.github.libretube.ui.adapters
 import android.annotation.SuppressLint
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.R
 import com.github.libretube.api.obj.PipedInstance
 import com.github.libretube.databinding.InstanceRowBinding
 import com.github.libretube.ui.viewholders.InstancesViewHolder
-import com.google.common.collect.ImmutableList
 
 class InstancesAdapter(
-    private val instances: ImmutableList<PipedInstance>,
     initialSelectionApiIndex: Int?,
     private val onSelectInstance: (index: Int) -> Unit
-) : RecyclerView.Adapter<InstancesViewHolder>() {
+) : ListAdapter<PipedInstance, InstancesViewHolder>(object: DiffUtil.ItemCallback<PipedInstance>() {
+    override fun areItemsTheSame(oldItem: PipedInstance, newItem: PipedInstance): Boolean {
+        return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(oldItem: PipedInstance, newItem: PipedInstance): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
     private var selectedInstanceIndex = initialSelectionApiIndex?.takeIf { it >= 0 }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): InstancesViewHolder {
@@ -23,11 +31,9 @@ class InstancesAdapter(
         return InstancesViewHolder(binding)
     }
 
-    override fun getItemCount() = instances.size
-
     @SuppressLint("SetTextI18n")
     override fun onBindViewHolder(holder: InstancesViewHolder, position: Int) {
-        val instance = instances[position]
+        val instance = getItem(holder.bindingAdapterPosition)
 
         holder.binding.apply {
             var instanceText = "${instance.name} ${instance.locations}"

app/src/main/java/com/github/libretube/ui/adapters/LegacySubscriptionAdapter.kt

@@ -3,7 +3,9 @@ package com.github.libretube.ui.adapters
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.core.os.bundleOf
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import com.github.libretube.api.obj.Subscription
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.LegacySubscriptionChannelBinding
 import com.github.libretube.extensions.toID
@@ -13,9 +15,17 @@ import com.github.libretube.ui.base.BaseActivity
 import com.github.libretube.ui.sheets.ChannelOptionsBottomSheet
 import com.github.libretube.ui.viewholders.LegacySubscriptionViewHolder
 
-class LegacySubscriptionAdapter(
+class LegacySubscriptionAdapter : ListAdapter<Subscription, LegacySubscriptionViewHolder>(object :
-    private val subscriptions: List<com.github.libretube.api.obj.Subscription>
+    DiffUtil.ItemCallback<Subscription>() {
-) : RecyclerView.Adapter<LegacySubscriptionViewHolder>() {
+    override fun areItemsTheSame(oldItem: Subscription, newItem: Subscription): Boolean {
+        return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(oldItem: Subscription, newItem: Subscription): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
 
     override fun onCreateViewHolder(
         parent: ViewGroup,
@@ -27,7 +37,7 @@ class LegacySubscriptionAdapter(
     }
 
     override fun onBindViewHolder(holder: LegacySubscriptionViewHolder, position: Int) {
-        val subscription = subscriptions[position]
+        val subscription = getItem(holder.bindingAdapterPosition)
         holder.binding.apply {
             channelName.text = subscription.name
             ImageHelper.loadImage(
@@ -51,6 +61,4 @@ class LegacySubscriptionAdapter(
             }
         }
     }
-
-    override fun getItemCount() = subscriptions.size
 }

app/src/main/java/com/github/libretube/ui/adapters/PlaylistBookmarkAdapter.kt

@@ -5,7 +5,8 @@ import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.core.os.bundleOf
 import androidx.core.view.isVisible
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.R
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.PlaylistBookmarkRowBinding
@@ -23,9 +24,17 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 
 class PlaylistBookmarkAdapter(
-    private val bookmarks: List<PlaylistBookmark>,
     private val bookmarkMode: BookmarkMode = BookmarkMode.FRAGMENT
-) : RecyclerView.Adapter<PlaylistBookmarkViewHolder>() {
+) : ListAdapter<PlaylistBookmark, PlaylistBookmarkViewHolder>(object: DiffUtil.ItemCallback<PlaylistBookmark>() {
+    override fun areItemsTheSame(oldItem: PlaylistBookmark, newItem: PlaylistBookmark): Boolean {
+        return oldItem.playlistId == newItem.playlistId
+    }
+
+    override fun areContentsTheSame(oldItem: PlaylistBookmark, newItem: PlaylistBookmark): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PlaylistBookmarkViewHolder {
         val layoutInflater = LayoutInflater.from(parent.context)
         return when (bookmarkMode) {
@@ -39,8 +48,6 @@ class PlaylistBookmarkAdapter(
         }
     }
 
-    override fun getItemCount() = bookmarks.size
-
     private fun showPlaylistOptions(context: Context, bookmark: PlaylistBookmark) {
         val sheet = PlaylistOptionsBottomSheet()
         sheet.arguments = bundleOf(
@@ -54,7 +61,7 @@ class PlaylistBookmarkAdapter(
     }
 
     override fun onBindViewHolder(holder: PlaylistBookmarkViewHolder, position: Int) {
-        val bookmark = bookmarks[position]
+        val bookmark = getItem(holder.bindingAdapterPosition)
         holder.playlistBookmarkBinding?.apply {
             ImageHelper.loadImage(bookmark.thumbnailUrl, thumbnail)
             playlistName.text = bookmark.playlistName

app/src/main/java/com/github/libretube/ui/adapters/PlaylistsAdapter.kt

@@ -3,7 +3,8 @@ package com.github.libretube.ui.adapters
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.core.os.bundleOf
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.R
 import com.github.libretube.api.obj.Playlists
 import com.github.libretube.constants.IntentData
@@ -17,18 +18,18 @@ import com.github.libretube.ui.sheets.PlaylistOptionsBottomSheet.Companion.PLAYL
 import com.github.libretube.ui.viewholders.PlaylistsViewHolder
 
 class PlaylistsAdapter(
-    private val playlists: MutableList<Playlists>,
     private val playlistType: PlaylistType
-) : RecyclerView.Adapter<PlaylistsViewHolder>() {
+) : ListAdapter<Playlists, PlaylistsViewHolder>(object : DiffUtil.ItemCallback<Playlists>() {
-
+    override fun areItemsTheSame(oldItem: Playlists, newItem: Playlists): Boolean {
-    override fun getItemCount() = playlists.size
+        return oldItem.id == newItem.id
-
-    fun updateItems(newItems: List<Playlists>) {
-        val oldSize = playlists.size
-        playlists.addAll(newItems)
-        notifyItemRangeInserted(oldSize, playlists.size)
     }
 
+    override fun areContentsTheSame(oldItem: Playlists, newItem: Playlists): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
+
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PlaylistsViewHolder {
         val layoutInflater = LayoutInflater.from(parent.context)
         val binding = PlaylistsRowBinding.inflate(layoutInflater, parent, false)
@@ -36,7 +37,7 @@ class PlaylistsAdapter(
     }
 
     override fun onBindViewHolder(holder: PlaylistsViewHolder, position: Int) {
-        val playlist = playlists[position]
+        val playlist = getItem(holder.bindingAdapterPosition)
         holder.binding.apply {
             // set imageview drawable as empty playlist if imageview empty
             if (playlist.thumbnail.orEmpty().split("/").size <= 4) {
@@ -80,7 +81,7 @@ class PlaylistsAdapter(
 
                     if (isPlaylistToBeDeleted) {
                         // try to refresh the playlists in the library on deletion success
-                        onDelete(position, root.context as BaseActivity)
+                        onDelete(position)
                     }
                 }
 
@@ -99,11 +100,10 @@ class PlaylistsAdapter(
         }
     }
 
-    private fun onDelete(position: Int, activity: BaseActivity) {
+    private fun onDelete(position: Int) {
-        playlists.removeAt(position)
+        val newList = currentList.toMutableList().also {
-        activity.runOnUiThread {
+            it.removeAt(position)
-            notifyItemRemoved(position)
+        }
-            notifyItemRangeChanged(position, itemCount)
+        submitList(newList)
-        }
     }
 }

app/src/main/java/com/github/libretube/ui/adapters/SearchHistoryAdapter.kt

@@ -2,9 +2,9 @@ package com.github.libretube.ui.adapters
 
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.appcompat.widget.SearchView
 import androidx.core.view.isVisible
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.databinding.SuggestionRowBinding
 import com.github.libretube.db.DatabaseHolder.Database
 import com.github.libretube.db.obj.SearchHistoryItem
@@ -13,13 +13,18 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.runBlocking
 
 class SearchHistoryAdapter(
-    private var historyList: List<String>,
+    private val onRootClickListener: (String) -> Unit,
-    private val searchView: SearchView
+    private val onArrowClickListener: (String) -> Unit,
-) :
+) : ListAdapter<String, SuggestionsViewHolder>(object: DiffUtil.ItemCallback<String>() {
-    RecyclerView.Adapter<SuggestionsViewHolder>() {
+    override fun areItemsTheSame(oldItem: String, newItem: String): Boolean {
+        return oldItem == newItem
+    }
 
-    override fun getItemCount() = historyList.size
+    override fun areContentsTheSame(oldItem: String, newItem: String): Boolean {
+        return oldItem == newItem
+    }
 
+}) {
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SuggestionsViewHolder {
         val layoutInflater = LayoutInflater.from(parent.context)
         val binding = SuggestionRowBinding.inflate(layoutInflater, parent, false)
@@ -27,26 +32,28 @@ class SearchHistoryAdapter(
     }
 
     override fun onBindViewHolder(holder: SuggestionsViewHolder, position: Int) {
-        val historyQuery = historyList[position]
+        val historyQuery = getItem(holder.bindingAdapterPosition)
         holder.binding.apply {
             suggestionText.text = historyQuery
 
             deleteHistory.isVisible = true
 
             deleteHistory.setOnClickListener {
-                historyList -= historyQuery
+                val updatedList =  currentList.toMutableList().also {
+                    it.remove(historyQuery)
+                }
                 runBlocking(Dispatchers.IO) {
                     Database.searchHistoryDao().delete(SearchHistoryItem(historyQuery))
                 }
-                notifyItemRemoved(position)
+
-                notifyItemRangeChanged(position, itemCount)
+                submitList(updatedList)
             }
 
             root.setOnClickListener {
-                searchView.setQuery(historyQuery, true)
+                onRootClickListener(historyQuery)
             }
             arrow.setOnClickListener {
-                searchView.setQuery(historyQuery, false)
+                onArrowClickListener(historyQuery)
             }
         }
     }

app/src/main/java/com/github/libretube/ui/adapters/SearchSuggestionsAdapter.kt

@@ -2,18 +2,24 @@ package com.github.libretube.ui.adapters
 
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.appcompat.widget.SearchView
+import androidx.recyclerview.widget.DiffUtil
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.databinding.SuggestionRowBinding
 import com.github.libretube.ui.viewholders.SuggestionsViewHolder
 
 class SearchSuggestionsAdapter(
-    private var suggestionsList: List<String>,
+    private val onRootClickListener: (String) -> Unit,
-    private val searchView: SearchView
+    private val onArrowClickListener: (String) -> Unit,
-) :
+) : ListAdapter<String, SuggestionsViewHolder>(object: DiffUtil.ItemCallback<String>() {
-    RecyclerView.Adapter<SuggestionsViewHolder>() {
+    override fun areItemsTheSame(oldItem: String, newItem: String): Boolean {
+        return oldItem == newItem
+    }
 
-    override fun getItemCount() = suggestionsList.size
+    override fun areContentsTheSame(oldItem: String, newItem: String): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SuggestionsViewHolder {
         val layoutInflater = LayoutInflater.from(parent.context)
@@ -22,14 +28,14 @@ class SearchSuggestionsAdapter(
     }
 
     override fun onBindViewHolder(holder: SuggestionsViewHolder, position: Int) {
-        val suggestion = suggestionsList[position]
+        val suggestion = getItem(holder.bindingAdapterPosition)
         holder.binding.apply {
             suggestionText.text = suggestion
             root.setOnClickListener {
-                searchView.setQuery(suggestion, true)
+                onRootClickListener(suggestion)
             }
             arrow.setOnClickListener {
-                searchView.setQuery(suggestion, false)
+                onArrowClickListener(suggestion)
             }
         }
     }

app/src/main/java/com/github/libretube/ui/adapters/SubscriptionChannelAdapter.kt

@@ -3,7 +3,8 @@ package com.github.libretube.ui.adapters
 import android.view.LayoutInflater
 import android.view.ViewGroup
 import androidx.core.os.bundleOf
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.api.obj.Subscription
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.ChannelSubscriptionRowBinding
@@ -15,12 +16,20 @@ import com.github.libretube.ui.extensions.setupSubscriptionButton
 import com.github.libretube.ui.sheets.ChannelOptionsBottomSheet
 import com.github.libretube.ui.viewholders.SubscriptionChannelViewHolder
 
-class SubscriptionChannelAdapter(
+class SubscriptionChannelAdapter : ListAdapter<Subscription, SubscriptionChannelViewHolder>(object :
-    private val subscriptions: MutableList<Subscription>
+    DiffUtil.ItemCallback<Subscription>() {
-) : RecyclerView.Adapter<SubscriptionChannelViewHolder>() {
+    override fun areItemsTheSame(oldItem: Subscription, newItem: Subscription): Boolean {
+        return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(oldItem: Subscription, newItem: Subscription): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
     private var visibleCount = 20
 
-    override fun getItemCount() = minOf(visibleCount, subscriptions.size)
+    override fun getItemCount() = minOf(visibleCount, currentList.size)
 
     override fun onCreateViewHolder(
         parent: ViewGroup,
@@ -33,13 +42,13 @@ class SubscriptionChannelAdapter(
 
     fun updateItems() {
         val oldSize = visibleCount
-        visibleCount += minOf(10, subscriptions.size - oldSize)
+        visibleCount += minOf(10, currentList.size - oldSize)
         if (visibleCount == oldSize) return
         notifyItemRangeInserted(oldSize, visibleCount)
     }
 
     override fun onBindViewHolder(holder: SubscriptionChannelViewHolder, position: Int) {
-        val subscription = subscriptions[position]
+        val subscription = getItem(holder.bindingAdapterPosition)
 
         holder.binding.apply {
             subscriptionChannelName.text = subscription.name

app/src/main/java/com/github/libretube/ui/adapters/SubscriptionGroupChannelsAdapter.kt

@@ -2,7 +2,8 @@ package com.github.libretube.ui.adapters
 
 import android.view.LayoutInflater
 import android.view.ViewGroup
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.api.obj.Subscription
 import com.github.libretube.databinding.SubscriptionGroupChannelRowBinding
 import com.github.libretube.db.obj.SubscriptionGroup
@@ -12,10 +13,18 @@ import com.github.libretube.helpers.NavigationHelper
 import com.github.libretube.ui.viewholders.SubscriptionGroupChannelRowViewHolder
 
 class SubscriptionGroupChannelsAdapter(
-    private val channels: List<Subscription>,
     private val group: SubscriptionGroup,
     private val onGroupChanged: (SubscriptionGroup) -> Unit
-) : RecyclerView.Adapter<SubscriptionGroupChannelRowViewHolder>() {
+) : ListAdapter<Subscription, SubscriptionGroupChannelRowViewHolder>(object: DiffUtil.ItemCallback<Subscription>() {
+    override fun areItemsTheSame(oldItem: Subscription, newItem: Subscription): Boolean {
+        return oldItem == newItem
+    }
+
+    override fun areContentsTheSame(oldItem: Subscription, newItem: Subscription): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
     override fun onCreateViewHolder(
         parent: ViewGroup,
         viewType: Int
@@ -25,10 +34,8 @@ class SubscriptionGroupChannelsAdapter(
         return SubscriptionGroupChannelRowViewHolder(binding)
     }
 
-    override fun getItemCount() = channels.size
-
     override fun onBindViewHolder(holder: SubscriptionGroupChannelRowViewHolder, position: Int) {
-        val channel = channels[position]
+        val channel = getItem(holder.bindingAdapterPosition)
         holder.binding.apply {
             root.setOnClickListener {
                 NavigationHelper.navigateChannel(root.context, channel.url)

app/src/main/java/com/github/libretube/ui/adapters/VideosAdapter.kt

@@ -8,8 +8,9 @@ import androidx.core.os.bundleOf
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.core.view.updateLayoutParams
+import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.GridLayoutManager
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.ListAdapter
 import androidx.recyclerview.widget.RecyclerView.LayoutManager
 import com.github.libretube.api.obj.StreamItem
 import com.github.libretube.constants.IntentData
@@ -36,29 +37,38 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
 class VideosAdapter(
-    private val streamItems: MutableList<StreamItem>,
     private val forceMode: LayoutMode = LayoutMode.RESPECT_PREF
-) : RecyclerView.Adapter<VideosViewHolder>() {
+) : ListAdapter<StreamItem, VideosViewHolder>(object: DiffUtil.ItemCallback<StreamItem>() {
-    override fun getItemCount() = streamItems.size
+    override fun areItemsTheSame(oldItem: StreamItem, newItem: StreamItem): Boolean {
+        return oldItem == newItem
+    }
 
+    override fun areContentsTheSame(oldItem: StreamItem, newItem: StreamItem): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
     override fun getItemViewType(position: Int): Int {
-        return if (streamItems[position].type == CAUGHT_UP_STREAM_TYPE) CAUGHT_UP_TYPE else NORMAL_TYPE
+        return if (currentList[position].type == CAUGHT_UP_STREAM_TYPE) CAUGHT_UP_TYPE else NORMAL_TYPE
     }
 
     fun insertItems(newItems: List<StreamItem>) {
-        val feedSize = streamItems.size
+        val updatedList = currentList.toMutableList().also {
-        streamItems.addAll(newItems)
+            it.addAll(newItems)
-        notifyItemRangeInserted(feedSize, newItems.size)
+        }
+
+        submitList(updatedList)
     }
 
     fun removeItemById(videoId: String) {
-        val index = streamItems.indexOfFirst {
+        val index = currentList.indexOfFirst {
             it.url?.toID() == videoId
         }.takeIf { it > 0 } ?: return
-        streamItems.removeAt(index)
+        val updatedList = currentList.toMutableList().also {
+            it.removeAt(index)
+        }
 
-        notifyItemRemoved(index)
+        submitList(updatedList)
-        notifyItemRangeChanged(index, itemCount)
     }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): VideosViewHolder {
@@ -90,7 +100,7 @@ class VideosAdapter(
 
     @SuppressLint("SetTextI18n")
     override fun onBindViewHolder(holder: VideosViewHolder, position: Int) {
-        val video = streamItems[position]
+        val video = getItem(holder.bindingAdapterPosition)
         val videoId = video.url.orEmpty().toID()
 
         val context = (

app/src/main/java/com/github/libretube/ui/adapters/WatchHistoryAdapter.kt

@@ -5,7 +5,8 @@ import android.view.ViewGroup
 import androidx.core.os.bundleOf
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
-import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.VideoRowBinding
 import com.github.libretube.db.DatabaseHolder
@@ -24,27 +25,34 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.runBlocking
 import kotlinx.coroutines.withContext
 
-class WatchHistoryAdapter(
+class WatchHistoryAdapter : ListAdapter<WatchHistoryItem, WatchHistoryViewHolder>(object :
-    private val watchHistory: MutableList<WatchHistoryItem>
+    DiffUtil.ItemCallback<WatchHistoryItem>() {
-) :
+    override fun areItemsTheSame(oldItem: WatchHistoryItem, newItem: WatchHistoryItem): Boolean {
-    RecyclerView.Adapter<WatchHistoryViewHolder>() {
+        return oldItem == newItem
+    }
 
-    override fun getItemCount() = watchHistory.size
+    override fun areContentsTheSame(oldItem: WatchHistoryItem, newItem: WatchHistoryItem): Boolean {
+        return oldItem == newItem
+    }
+
+}) {
 
     fun removeFromWatchHistory(position: Int) {
-        val history = watchHistory[position]
+        val history = getItem(position)
         runBlocking(Dispatchers.IO) {
             DatabaseHolder.Database.watchHistoryDao().delete(history)
         }
-        watchHistory.removeAt(position)
+        val updatedList = currentList.toMutableList().also {
-        notifyItemRemoved(position)
+            it.removeAt(position)
-        notifyItemRangeChanged(position, itemCount)
+        }
+        submitList(updatedList)
     }
 
     fun insertItems(items: List<WatchHistoryItem>) {
-        val oldSize = itemCount
+        val updatedList = currentList.toMutableList().also {
-        this.watchHistory.addAll(items)
+            it.addAll(items)
-        notifyItemRangeInserted(oldSize, itemCount)
+        }
+        submitList(updatedList)
     }
 
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): WatchHistoryViewHolder {
@@ -54,7 +62,7 @@ class WatchHistoryAdapter(
     }
 
     override fun onBindViewHolder(holder: WatchHistoryViewHolder, position: Int) {
-        val video = watchHistory[position]
+        val video = getItem(holder.bindingAdapterPosition)
         holder.binding.apply {
             videoTitle.text = video.title
             channelName.text = video.uploader

app/src/main/java/com/github/libretube/ui/fragments/ChannelContentFragment.kt

@@ -87,10 +87,8 @@ class ChannelContentFragment : DynamicLayoutManagerFragment(R.layout.fragment_ch
         }
         nextPage = response.nextpage
 
-        val binding = _binding ?: return@launch
-        searchChannelAdapter = SearchChannelAdapter()
-        binding.channelRecView.adapter = searchChannelAdapter
         searchChannelAdapter?.submitList(response.content)
+        val binding = _binding ?: return@launch
         binding.progressBar.isGone = true
 
         isLoading = false
@@ -123,6 +121,9 @@ class ChannelContentFragment : DynamicLayoutManagerFragment(R.layout.fragment_ch
         channelId = arguments.getString(IntentData.channelId)
         nextPage = arguments.getString(IntentData.nextPage)
 
+        searchChannelAdapter = SearchChannelAdapter()
+        binding.channelRecView.adapter = searchChannelAdapter
+
         binding.channelRecView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
             override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
                 super.onScrollStateChanged(recyclerView, newState)
@@ -147,9 +148,10 @@ class ChannelContentFragment : DynamicLayoutManagerFragment(R.layout.fragment_ch
 
         if (tabData?.data.isNullOrEmpty()) {
             channelAdapter = VideosAdapter(
-                arguments.parcelableArrayList<StreamItem>(IntentData.videoList)!!,
                 forceMode = VideosAdapter.Companion.LayoutMode.CHANNEL_ROW
-            )
+            ).also {
+                it.submitList(arguments.parcelableArrayList<StreamItem>(IntentData.videoList)!!)
+            }
             binding.channelRecView.adapter = channelAdapter
             binding.progressBar.isGone = true
 

app/src/main/java/com/github/libretube/ui/fragments/ChannelFragment.kt

@@ -236,9 +236,10 @@ class ChannelFragment : DynamicLayoutManagerFragment(R.layout.fragment_channel)
         }.attach()
 
         channelAdapter = VideosAdapter(
-            response.relatedStreams.toMutableList(),
             forceMode = VideosAdapter.Companion.LayoutMode.CHANNEL_ROW
-        )
+        ).also {
+            it.submitList(response.relatedStreams)
+        }
         tabList.clear()
 
         val tabs = listOf(ChannelTab(VIDEOS_TAB_KEY, "")) + response.tabs

app/src/main/java/com/github/libretube/ui/fragments/DownloadsFragment.kt

@@ -146,39 +146,7 @@ class DownloadsFragmentPage : DynamicLayoutManagerFragment(R.layout.fragment_dow
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         _binding = FragmentDownloadContentBinding.bind(view)
         super.onViewCreated(view, savedInstanceState)
-
+        adapter = DownloadsAdapter(requireContext(), downloadTab) {
-        var selectedSortType =
-            PreferenceHelper.getInt(PreferenceKeys.SELECTED_DOWNLOAD_SORT_TYPE, 0)
-        val filterOptions = resources.getStringArray(R.array.downloadSortOptions)
-        binding.sortType.text = filterOptions[selectedSortType]
-        binding.sortType.setOnClickListener {
-            BaseBottomSheet().setSimpleItems(filterOptions.toList()) { index ->
-                binding.sortType.text = filterOptions[index]
-                if (::adapter.isInitialized) {
-                    sortDownloadList(index, selectedSortType)
-                    adapter.notifyDataSetChanged()
-                }
-                selectedSortType = index
-                PreferenceHelper.putInt(
-                    PreferenceKeys.SELECTED_DOWNLOAD_SORT_TYPE,
-                    index
-                )
-            }.show(childFragmentManager)
-        }
-
-        lifecycleScope.launch {
-            val dbDownloads = withContext(Dispatchers.IO) {
-                Database.downloadDao().getAll()
-            }
-
-            downloads.clear()
-            downloads.addAll(dbDownloads.filterByTab(downloadTab))
-
-            if (downloads.isEmpty()) return@launch
-
-            sortDownloadList(selectedSortType)
-
-            adapter = DownloadsAdapter(requireContext(), downloadTab, downloads) {
             var isDownloading = false
             val ids = it.downloadItems
                 .filter { item -> item.path.fileSize() < item.downloadSize }
@@ -205,6 +173,37 @@ class DownloadsFragmentPage : DynamicLayoutManagerFragment(R.layout.fragment_dow
         }
         binding.downloadsRecView.adapter = adapter
 
+        var selectedSortType =
+            PreferenceHelper.getInt(PreferenceKeys.SELECTED_DOWNLOAD_SORT_TYPE, 0)
+        val filterOptions = resources.getStringArray(R.array.downloadSortOptions)
+        binding.sortType.text = filterOptions[selectedSortType]
+        binding.sortType.setOnClickListener {
+            BaseBottomSheet().setSimpleItems(filterOptions.toList()) { index ->
+                binding.sortType.text = filterOptions[index]
+                if (::adapter.isInitialized) {
+                    sortDownloadList(index, selectedSortType)
+                }
+                selectedSortType = index
+                PreferenceHelper.putInt(
+                    PreferenceKeys.SELECTED_DOWNLOAD_SORT_TYPE,
+                    index
+                )
+            }.show(childFragmentManager)
+        }
+
+        lifecycleScope.launch {
+            val dbDownloads = withContext(Dispatchers.IO) {
+                Database.downloadDao().getAll()
+            }
+
+            downloads.clear()
+            downloads.addAll(dbDownloads.filterByTab(downloadTab))
+
+            if (downloads.isEmpty()) return@launch
+
+            sortDownloadList(selectedSortType)
+
+
             binding.downloadsRecView.setOnDismissListener { position ->
                 adapter.showDeleteDialog(requireContext(), position)
                 // put the item back to the center, as it's currently out of the screen
@@ -251,10 +250,10 @@ class DownloadsFragmentPage : DynamicLayoutManagerFragment(R.layout.fragment_dow
 
     private fun sortDownloadList(sortType: Int, previousSortType: Int? = null) {
         if (previousSortType == null && sortType == 1) {
-            downloads.reverse()
+            adapter.submitList(downloads.reversed())
         }
         if (previousSortType != null && sortType != previousSortType) {
-            downloads.reverse()
+            adapter.submitList(downloads.reversed())
         }
     }
 
@@ -269,7 +268,7 @@ class DownloadsFragmentPage : DynamicLayoutManagerFragment(R.layout.fragment_dow
             .setPositiveButton(R.string.okay) { _, _ ->
                 lifecycleScope.launch {
                     for (downloadIndex in downloads.size - 1 downTo 0) {
-                        val download = adapter.itemAt(downloadIndex).download
+                        val download = adapter.currentList[downloadIndex].download
                         if (!onlyDeleteWatchedVideos || DatabaseHelper.isVideoWatched(download.videoId, download.duration ?: 0)) {
                             adapter.deleteDownload(downloadIndex)
                         }

app/src/main/java/com/github/libretube/ui/fragments/HomeFragment.kt

@@ -8,9 +8,6 @@ import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
 import androidx.navigation.fragment.findNavController
-import androidx.recyclerview.widget.GridLayoutManager
-import androidx.recyclerview.widget.LinearLayoutManager
-import androidx.recyclerview.widget.LinearLayoutManager.HORIZONTAL
 import androidx.recyclerview.widget.RecyclerView
 import com.github.libretube.R
 import com.github.libretube.api.PlaylistsHelper
@@ -41,10 +38,32 @@ class HomeFragment : Fragment(R.layout.fragment_home) {
     private val subscriptionsViewModel: SubscriptionsViewModel by activityViewModels()
     private val homeViewModel: HomeViewModel by activityViewModels()
 
+    private val trendingAdapter = VideosAdapter(forceMode = LayoutMode.TRENDING_ROW)
+    private val feedAdapter = VideosAdapter(forceMode = LayoutMode.RELATED_COLUMN)
+    private val watchingAdapter = VideosAdapter(forceMode = LayoutMode.RELATED_COLUMN)
+    private val bookmarkAdapter = PlaylistBookmarkAdapter(PlaylistBookmarkAdapter.Companion.BookmarkMode.HOME)
+    private val playlistAdapter = PlaylistsAdapter(playlistType = PlaylistsHelper.getPrivatePlaylistType())
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         _binding = FragmentHomeBinding.bind(view)
         super.onViewCreated(view, savedInstanceState)
 
+        binding.trendingRV.adapter = trendingAdapter
+        binding.featuredRV.adapter = feedAdapter
+        binding.bookmarksRV.adapter = bookmarkAdapter
+        binding.playlistsRV.adapter = playlistAdapter
+        binding.playlistsRV.adapter?.registerAdapterDataObserver(object :
+            RecyclerView.AdapterDataObserver() {
+            override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
+                super.onItemRangeRemoved(positionStart, itemCount)
+                if (itemCount == 0) {
+                    binding.playlistsRV.isGone = true
+                    binding.playlistsTV.isGone = true
+                }
+            }
+        })
+        binding.watchingRV.adapter = watchingAdapter
+
         with(homeViewModel) {
             trending.observe(viewLifecycleOwner, ::showTrending)
             feed.observe(viewLifecycleOwner, ::showFeed)
@@ -123,11 +142,7 @@ class HomeFragment : Fragment(R.layout.fragment_home) {
         if (streamItems == null) return
 
         makeVisible(binding.trendingRV, binding.trendingTV)
-        binding.trendingRV.layoutManager = GridLayoutManager(context, 2)
+        trendingAdapter.submitList(streamItems)
-        binding.trendingRV.adapter = VideosAdapter(
-            streamItems.toMutableList(),
-            forceMode = LayoutMode.TRENDING_ROW
-        )
     }
 
     private fun showFeed(streamItems: List<StreamItem>?) {
@@ -138,57 +153,29 @@ class HomeFragment : Fragment(R.layout.fragment_home) {
         val feedVideos = streamItems
             .let { DatabaseHelper.filterByStatusAndWatchPosition(it, hideWatched) }
             .take(20)
-            .toMutableList()
 
-        with(binding.featuredRV) {
+        feedAdapter.submitList(feedVideos)
-            layoutManager = LinearLayoutManager(context, HORIZONTAL, false)
-            adapter = VideosAdapter(feedVideos, forceMode = LayoutMode.RELATED_COLUMN)
-        }
     }
 
     private fun showBookmarks(bookmarks: List<PlaylistBookmark>?) {
         if (bookmarks == null) return
 
         makeVisible(binding.bookmarksTV, binding.bookmarksRV)
-        with(binding.bookmarksRV) {
+        bookmarkAdapter.submitList(bookmarks)
-            layoutManager = LinearLayoutManager(context, HORIZONTAL, false)
-            adapter = PlaylistBookmarkAdapter(
-                bookmarks.toMutableList(),
-                PlaylistBookmarkAdapter.Companion.BookmarkMode.HOME
-            )
-        }
     }
 
     private fun showPlaylists(playlists: List<Playlists>?) {
         if (playlists == null) return
 
         makeVisible(binding.playlistsRV, binding.playlistsTV)
-        binding.playlistsRV.layoutManager = LinearLayoutManager(context)
+        playlistAdapter.submitList(playlists)
-        binding.playlistsRV.adapter = PlaylistsAdapter(
-            playlists.toMutableList(),
-            playlistType = PlaylistsHelper.getPrivatePlaylistType()
-        )
-        binding.playlistsRV.adapter?.registerAdapterDataObserver(object :
-            RecyclerView.AdapterDataObserver() {
-            override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
-                super.onItemRangeRemoved(positionStart, itemCount)
-                if (itemCount == 0) {
-                    binding.playlistsRV.isGone = true
-                    binding.playlistsTV.isGone = true
-                }
-            }
-        })
     }
 
     private fun showContinueWatching(unwatchedVideos: List<StreamItem>?) {
         if (unwatchedVideos == null) return
 
         makeVisible(binding.watchingRV, binding.watchingTV)
-        binding.watchingRV.layoutManager = LinearLayoutManager(context, HORIZONTAL, false)
+        watchingAdapter.submitList(unwatchedVideos)
-        binding.watchingRV.adapter = VideosAdapter(
-            unwatchedVideos.toMutableList(),
-            forceMode = LayoutMode.RELATED_COLUMN
-        )
     }
 
     private fun updateLoading(isLoading: Boolean) {

app/src/main/java/com/github/libretube/ui/fragments/LibraryFragment.kt

@@ -45,6 +45,9 @@ class LibraryFragment : DynamicLayoutManagerFragment(R.layout.fragment_library)
 
     private val commonPlayerViewModel: CommonPlayerViewModel by activityViewModels()
 
+    private val playlistsAdapter = PlaylistsAdapter(PlaylistsHelper.getPrivatePlaylistType())
+    private val playlistBookmarkAdapter = PlaylistBookmarkAdapter()
+
     override fun setLayoutManagers(gridItems: Int) {
         _binding?.bookmarksRecView?.layoutManager = GridLayoutManager(context, gridItems.ceilHalf())
         _binding?.playlistRecView?.layoutManager = GridLayoutManager(context, gridItems.ceilHalf())
@@ -54,6 +57,18 @@ class LibraryFragment : DynamicLayoutManagerFragment(R.layout.fragment_library)
         _binding = FragmentLibraryBinding.bind(view)
         super.onViewCreated(view, savedInstanceState)
 
+        binding.bookmarksRecView.adapter = playlistBookmarkAdapter
+        // listen for playlists to become deleted
+        playlistsAdapter.registerAdapterDataObserver(object :
+            RecyclerView.AdapterDataObserver() {
+            override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
+                _binding?.nothingHere?.isVisible = playlistsAdapter.itemCount == 0
+                _binding?.sortTV?.isVisible = playlistsAdapter.itemCount > 0
+                super.onItemRangeRemoved(positionStart, itemCount)
+            }
+        })
+        binding.playlistRecView.adapter = playlistsAdapter
+
         // listen for the mini player state changing
         commonPlayerViewModel.isMiniPlayerVisible.observe(viewLifecycleOwner) {
             updateFABMargin(it)
@@ -142,7 +157,7 @@ class LibraryFragment : DynamicLayoutManagerFragment(R.layout.fragment_library)
 
             binding.bookmarksCV.isVisible = bookmarks.isNotEmpty()
             if (bookmarks.isNotEmpty()) {
-                binding.bookmarksRecView.adapter = PlaylistBookmarkAdapter(bookmarks)
+                playlistBookmarkAdapter.submitList(bookmarks)
             }
         }
     }
@@ -184,23 +199,8 @@ class LibraryFragment : DynamicLayoutManagerFragment(R.layout.fragment_library)
     private fun showPlaylists(playlists: List<Playlists>) {
         val binding = _binding ?: return
 
-        val playlistsAdapter = PlaylistsAdapter(
-            playlists.toMutableList(),
-            PlaylistsHelper.getPrivatePlaylistType()
-        )
-
-        // listen for playlists to become deleted
-        playlistsAdapter.registerAdapterDataObserver(object :
-            RecyclerView.AdapterDataObserver() {
-            override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
-                _binding?.nothingHere?.isVisible = playlistsAdapter.itemCount == 0
-                _binding?.sortTV?.isVisible = playlistsAdapter.itemCount > 0
-                super.onItemRangeRemoved(positionStart, itemCount)
-            }
-        })
-
         binding.nothingHere.isGone = true
         binding.sortTV.isVisible = true
-        binding.playlistRecView.adapter = playlistsAdapter
+        playlistsAdapter.submitList(playlists)
     }
 }

app/src/main/java/com/github/libretube/ui/fragments/PlayerFragment.kt

@@ -1128,13 +1128,14 @@ class PlayerFragment : Fragment(R.layout.fragment_player), OnlinePlayerOptions {
         if (PlayerHelper.relatedStreamsEnabled) {
             val relatedLayoutManager = binding.relatedRecView.layoutManager as LinearLayoutManager
             binding.relatedRecView.adapter = VideosAdapter(
-                streams.relatedStreams.filter { !it.title.isNullOrBlank() }.toMutableList(),
                 forceMode = if (relatedLayoutManager.orientation == LinearLayoutManager.HORIZONTAL) {
                     VideosAdapter.Companion.LayoutMode.RELATED_COLUMN
                 } else {
                     VideosAdapter.Companion.LayoutMode.TRENDING_ROW
                 }
-            )
+            ).also { adapter ->
+                adapter.submitList(streams.relatedStreams.filter { !it.title.isNullOrBlank() })
+            }
         }
 
         // update the subscribed state

app/src/main/java/com/github/libretube/ui/fragments/PlaylistFragment.kt

@@ -325,6 +325,7 @@ class PlaylistFragment : DynamicLayoutManagerFragment(R.layout.fragment_playlist
             playlistId,
             playlistType
         )
+        // TODO make sure the adapter is set once in onViewCreated
         binding.playlistRecView.adapter = playlistAdapter
 
         // listen for playlist items to become deleted

app/src/main/java/com/github/libretube/ui/fragments/SearchSuggestionsFragment.kt

@@ -7,9 +7,10 @@ import androidx.core.view.isGone
 import androidx.core.view.isVisible
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.distinctUntilChanged
 import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.map
 import androidx.navigation.fragment.findNavController
-import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.libretube.R
 import com.github.libretube.api.RetrofitInstance
 import com.github.libretube.constants.IntentData
@@ -34,6 +35,27 @@ class SearchSuggestionsFragment : Fragment(R.layout.fragment_search_suggestions)
     private val viewModel: SearchViewModel by activityViewModels()
     private val mainActivity get() = activity as MainActivity
 
+    private val historyAdapter = SearchHistoryAdapter(
+        onRootClickListener = { historyQuery ->
+            runCatching {
+                (activity as MainActivity?)?.searchView
+            }.getOrNull()?.setQuery(historyQuery, true)
+        },
+        onArrowClickListener = { historyQuery ->
+            runCatching {
+                (activity as MainActivity?)?.searchView
+            }.getOrNull()?.setQuery(historyQuery, false)
+        }
+    )
+    private val suggestionsAdapter = SearchSuggestionsAdapter(
+        onRootClickListener = { suggestion ->
+            (activity as MainActivity?)?.searchView?.setQuery(suggestion, true)
+        },
+        onArrowClickListener = { suggestion ->
+            (activity as MainActivity?)?.searchView?.setQuery(suggestion, false)
+        },
+    )
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         viewModel.searchQuery.value = arguments?.getString(IntentData.query)
@@ -43,9 +65,15 @@ class SearchSuggestionsFragment : Fragment(R.layout.fragment_search_suggestions)
         _binding = FragmentSearchSuggestionsBinding.bind(view)
         super.onViewCreated(view, savedInstanceState)
 
-        binding.suggestionsRecycler.layoutManager = LinearLayoutManager(requireContext()).apply {
+        viewModel.searchQuery
-            reverseLayout = true
+            .map { it.isNullOrEmpty() }
-            stackFromEnd = true
+            .distinctUntilChanged()
+            .observe(viewLifecycleOwner) { isQueryEmpty ->
+                if (isQueryEmpty) {
+                    binding.suggestionsRecycler.adapter = historyAdapter
+                } else if (PreferenceHelper.getBoolean(PreferenceKeys.SEARCH_SUGGESTIONS, true)) {
+                    binding.suggestionsRecycler.adapter = suggestionsAdapter
+                }
         }
 
         // waiting for the query to change
@@ -81,30 +109,19 @@ class SearchSuggestionsFragment : Fragment(R.layout.fragment_search_suggestions)
                 return@launch
             }
             // only load the suggestions if the input field didn't get cleared yet
-            val suggestionsAdapter = SearchSuggestionsAdapter(
+            if (!viewModel.searchQuery.value.isNullOrEmpty()) {
-                response.reversed(),
+                suggestionsAdapter.submitList(response.reversed())
-                (activity as MainActivity).searchView
-            )
-            if (isAdded && !viewModel.searchQuery.value.isNullOrEmpty()) {
-                binding.suggestionsRecycler.adapter = suggestionsAdapter
             }
         }
     }
 
     private fun showHistory() {
-        val searchView = runCatching {
-            (activity as MainActivity).searchView
-        }.getOrNull()
-
         lifecycleScope.launch {
             val historyList = withContext(Dispatchers.IO) {
                 Database.searchHistoryDao().getAll().map { it.query }
             }
-            if (historyList.isNotEmpty() && searchView != null) {
+            if (historyList.isNotEmpty()) {
-                binding.suggestionsRecycler.adapter = SearchHistoryAdapter(
+                historyAdapter.submitList(historyList)
-                    historyList,
-                    searchView
-                )
             } else {
                 binding.suggestionsRecycler.isGone = true
                 binding.historyEmpty.isVisible = true

app/src/main/java/com/github/libretube/ui/fragments/SubscriptionsFragment.kt

@@ -64,10 +64,9 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
     private var isCurrentTabSubChannels = false
     private var isAppBarFullyExpanded = true
 
-    private var feedAdapter: VideosAdapter? = null
+    private var feedAdapter = VideosAdapter()
     private val sortedFeed: MutableList<StreamItem> = mutableListOf()
 
-    private var channelsAdapter: SubscriptionChannelAdapter? = null
     private var selectedSortOrder = PreferenceHelper.getInt(PreferenceKeys.FEED_SORT_ORDER, 0)
         set(value) {
             PreferenceHelper.putInt(PreferenceKeys.FEED_SORT_ORDER, value)
@@ -84,6 +83,9 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
     private var subChannelsRecyclerViewState: Parcelable? = null
     private var subFeedRecyclerViewState: Parcelable? = null
 
+    private val legacySubscriptionsAdapter = LegacySubscriptionAdapter()
+    private val channelsAdapter = SubscriptionChannelAdapter()
+
     override fun setLayoutManagers(gridItems: Int) {
         _binding?.subFeed?.layoutManager = VideosAdapter.getLayout(requireContext(), gridItems)
     }
@@ -94,6 +96,27 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
 
         setupSortAndFilter()
 
+        binding.subFeed.adapter = feedAdapter
+
+        val legacySubscriptions = PreferenceHelper.getBoolean(
+            PreferenceKeys.LEGACY_SUBSCRIPTIONS,
+            false
+        )
+
+        if (legacySubscriptions) {
+            binding.subChannels.layoutManager = GridLayoutManager(
+                context,
+                PreferenceHelper.getString(
+                    PreferenceKeys.LEGACY_SUBSCRIPTIONS_COLUMNS,
+                    "4"
+                ).toInt()
+            )
+            binding.subChannels.adapter = legacySubscriptionsAdapter
+        } else {
+            binding.subChannels.layoutManager = LinearLayoutManager(context)
+            binding.subChannels.adapter = channelsAdapter
+        }
+
         // Check if the AppBarLayout is fully expanded
         binding.subscriptionsAppBar.addOnOffsetChangedListener { _, verticalOffset ->
             isAppBarFullyExpanded = verticalOffset == 0
@@ -145,7 +168,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
 
             if (viewModel.subscriptions.value != null && isCurrentTabSubChannels) {
                 binding.subRefresh.isRefreshing = true
-                channelsAdapter?.updateItems()
+                channelsAdapter.updateItems()
                 binding.subRefresh.isRefreshing = false
             }
         }
@@ -204,8 +227,6 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
     private fun loadNextFeedItems() {
         val binding = _binding ?: return
 
-        val feedAdapter = feedAdapter ?: return
-
         val hasMore = sortedFeed.size > feedAdapter.itemCount
         if (viewModel.videoFeed.value != null && !isCurrentTabSubChannels && !binding.subRefresh.isRefreshing && hasMore) {
             binding.subRefresh.isRefreshing = true
@@ -373,11 +394,8 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
         val notLoaded = viewModel.videoFeed.value.isNullOrEmpty()
         binding.subFeed.isGone = notLoaded
         binding.emptyFeed.isVisible = notLoaded
-
-        feedAdapter = VideosAdapter(mutableListOf())
         loadNextFeedItems()
 
-        binding.subFeed.adapter = feedAdapter
         binding.toggleSubs.text = getString(R.string.subscriptions)
 
         PreferenceHelper.updateLastFeedWatchedTime()
@@ -393,18 +411,9 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
         )
 
         if (legacySubscriptions) {
-            binding.subChannels.layoutManager = GridLayoutManager(
+            legacySubscriptionsAdapter.submitList(subscriptions)
-                context,
-                PreferenceHelper.getString(
-                    PreferenceKeys.LEGACY_SUBSCRIPTIONS_COLUMNS,
-                    "4"
-                ).toInt()
-            )
-            binding.subChannels.adapter = LegacySubscriptionAdapter(subscriptions)
         } else {
-            binding.subChannels.layoutManager = LinearLayoutManager(context)
+            channelsAdapter.submitList(subscriptions)
-            channelsAdapter = SubscriptionChannelAdapter(subscriptions.toMutableList())
-            binding.subChannels.adapter = channelsAdapter
         }
 
         binding.subRefresh.isRefreshing = false
@@ -420,7 +429,7 @@ class SubscriptionsFragment : DynamicLayoutManagerFragment(R.layout.fragment_sub
     }
 
     fun removeItem(videoId: String) {
-        feedAdapter?.removeItemById(videoId)
+        feedAdapter.removeItemById(videoId)
         sortedFeed.removeAll { it.url?.toID() != videoId }
     }
 

app/src/main/java/com/github/libretube/ui/fragments/TrendsFragment.kt

@@ -30,15 +30,18 @@ class TrendsFragment : DynamicLayoutManagerFragment(R.layout.fragment_trends) {
         _binding = FragmentTrendsBinding.bind(view)
         super.onViewCreated(view, savedInstanceState)
 
+        val adapter = VideosAdapter()
+        binding.recview.adapter = adapter
+        binding.recview.layoutManager?.onRestoreInstanceState(viewModel.recyclerViewState)
+
         viewModel.trendingVideos.observe(viewLifecycleOwner) { videos ->
             if (videos == null) return@observe
 
-            binding.recview.adapter = VideosAdapter(videos.toMutableList())
-            binding.recview.layoutManager?.onRestoreInstanceState(viewModel.recyclerViewState)
-
             binding.homeRefresh.isRefreshing = false
             binding.progressBar.isGone = true
 
+            adapter.submitList(videos)
+
             if (videos.isEmpty()) {
                 Snackbar.make(binding.root, R.string.change_region, Snackbar.LENGTH_LONG)
                     .setAction(R.string.settings) {

app/src/main/java/com/github/libretube/ui/fragments/WatchHistoryFragment.kt

@@ -50,6 +50,8 @@ class WatchHistoryFragment : DynamicLayoutManagerFragment(R.layout.fragment_watc
     private var isLoading = false
     private var recyclerViewState: Parcelable? = null
 
+    private val watchHistoryAdapter = WatchHistoryAdapter()
+
     private var selectedStatusFilter = PreferenceHelper.getInt(
         PreferenceKeys.SELECTED_HISTORY_STATUS_FILTER,
         0
@@ -80,6 +82,31 @@ class WatchHistoryFragment : DynamicLayoutManagerFragment(R.layout.fragment_watc
             _binding?.watchHistoryRecView?.updatePadding(bottom = if (it) 64f.dpToPx() else 0)
         }
 
+        binding.watchHistoryRecView.setOnDismissListener { position ->
+            watchHistoryAdapter.removeFromWatchHistory(position)
+        }
+
+        // observe changes to indicate if the history is empty
+        watchHistoryAdapter.registerAdapterDataObserver(object :
+            RecyclerView.AdapterDataObserver() {
+            override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
+                if (watchHistoryAdapter.itemCount == 0) {
+                    binding.historyContainer.isGone = true
+                    binding.historyEmpty.isVisible = true
+                }
+            }
+        })
+
+        binding.watchHistoryRecView.adapter = watchHistoryAdapter
+
+        // manually restore the recyclerview state due to https://github.com/material-components/material-components-android/issues/3473
+        binding.watchHistoryRecView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
+            override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
+                super.onScrollStateChanged(recyclerView, newState)
+                recyclerViewState = binding.watchHistoryRecView.layoutManager?.onSaveInstanceState()
+            }
+        })
+
         lifecycleScope.launch {
             val history = withContext(Dispatchers.IO) {
                 DatabaseHelper.getWatchHistoryPage(1, HISTORY_PAGE_SIZE)
@@ -139,14 +166,6 @@ class WatchHistoryFragment : DynamicLayoutManagerFragment(R.layout.fragment_watc
                 }.show(childFragmentManager)
             }
 
-            // manually restore the recyclerview state due to https://github.com/material-components/material-components-android/issues/3473
-            binding.watchHistoryRecView.addOnScrollListener(object : RecyclerView.OnScrollListener() {
-                override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
-                    super.onScrollStateChanged(recyclerView, newState)
-                    recyclerViewState = binding.watchHistoryRecView.layoutManager?.onSaveInstanceState()
-                }
-            })
-
             showWatchHistory(history)
         }
 
@@ -157,7 +176,6 @@ class WatchHistoryFragment : DynamicLayoutManagerFragment(R.layout.fragment_watc
 
     private fun showWatchHistory(history: List<WatchHistoryItem>) {
         val watchHistory = history.filterByStatusAndWatchPosition()
-        val watchHistoryAdapter = WatchHistoryAdapter(watchHistory.toMutableList())
 
         binding.playAll.setOnClickListener {
             PlayingQueue.resetToDefaults()
@@ -170,26 +188,10 @@ class WatchHistoryFragment : DynamicLayoutManagerFragment(R.layout.fragment_watc
                 keepQueue = true
             )
         }
-
+        watchHistoryAdapter.submitList(history)
-        binding.watchHistoryRecView.adapter = watchHistoryAdapter
         binding.historyEmpty.isGone = true
         binding.historyContainer.isVisible = true
 
-        binding.watchHistoryRecView.setOnDismissListener { position ->
-            watchHistoryAdapter.removeFromWatchHistory(position)
-        }
-
-        // observe changes to indicate if the history is empty
-        watchHistoryAdapter.registerAdapterDataObserver(object :
-            RecyclerView.AdapterDataObserver() {
-            override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
-                if (watchHistoryAdapter.itemCount == 0) {
-                    binding.historyContainer.isGone = true
-                    binding.historyEmpty.isVisible = true
-                }
-            }
-        })
-
         // add a listener for scroll end, delay needed to prevent loading new ones the first time
         handler.postDelayed(200) {
             if (_binding == null) return@postDelayed

app/src/main/java/com/github/libretube/ui/preferences/InstanceSettings.kt

@@ -187,8 +187,10 @@ class InstanceSettings : BasePreferenceFragment() {
         binding.optionsRecycler.layoutManager = LinearLayoutManager(context)
 
         val instances = ImmutableList.copyOf(this.instances)
-        binding.optionsRecycler.adapter = InstancesAdapter(instances, selectedIndex) {
+        binding.optionsRecycler.adapter = InstancesAdapter(selectedIndex) {
             selectedInstance = instances[it].apiUrl
+        }.also {
+            it.submitList(instances)
         }
 
         MaterialAlertDialogBuilder(requireContext())

app/src/main/java/com/github/libretube/ui/sheets/AddChannelToGroupSheet.kt

@@ -3,7 +3,6 @@ package com.github.libretube.ui.sheets
 import android.os.Bundle
 import android.view.View
 import androidx.lifecycle.lifecycleScope
-import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.libretube.R
 import com.github.libretube.constants.IntentData
 import com.github.libretube.databinding.DialogAddChannelToGroupBinding
@@ -16,6 +15,10 @@ import kotlinx.coroutines.withContext
 class AddChannelToGroupSheet : ExpandedBottomSheet(R.layout.dialog_add_channel_to_group) {
     private lateinit var channelId: String
 
+    private val addToGroupAdapter by lazy(LazyThreadSafetyMode.NONE) {
+        AddChannelToGroupAdapter(channelId)
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
 
@@ -26,7 +29,8 @@ class AddChannelToGroupSheet : ExpandedBottomSheet(R.layout.dialog_add_channel_t
         super.onViewCreated(view, savedInstanceState)
         val binding = DialogAddChannelToGroupBinding.bind(view)
 
-        binding.groupsRV.layoutManager = LinearLayoutManager(context)
+        binding.groupsRV.adapter = addToGroupAdapter
+
         binding.cancel.setOnClickListener {
             requireDialog().dismiss()
         }
@@ -36,7 +40,7 @@ class AddChannelToGroupSheet : ExpandedBottomSheet(R.layout.dialog_add_channel_t
             val subscriptionGroups = subGroupsDao.getAll().sortedBy { it.index }.toMutableList()
 
             withContext(Dispatchers.Main) {
-                binding.groupsRV.adapter = AddChannelToGroupAdapter(subscriptionGroups, channelId)
+                addToGroupAdapter.submitList(subscriptionGroups)
 
                 binding.okay.setOnClickListener {
                     requireDialog().hide()

app/src/main/java/com/github/libretube/ui/sheets/EditChannelGroupSheet.kt

@@ -30,8 +30,16 @@ class EditChannelGroupSheet : ExpandedBottomSheet(R.layout.dialog_edit_channel_g
     private val channelGroupsModel: EditChannelGroupsModel by activityViewModels()
     private var channels = listOf<Subscription>()
 
+    private val channelsAdapter = SubscriptionGroupChannelsAdapter(
+        channelGroupsModel.groupToEdit!!
+    ) {
+        channelGroupsModel.groupToEdit = it
+        updateConfirmStatus()
+    }
+
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         _binding = DialogEditChannelGroupBinding.bind(view)
+        binding.channelsRV.adapter = channelsAdapter
         binding.groupName.setText(channelGroupsModel.groupToEdit?.name)
         val oldGroupName = channelGroupsModel.groupToEdit?.name.orEmpty()
 
@@ -97,15 +105,12 @@ class EditChannelGroupSheet : ExpandedBottomSheet(R.layout.dialog_edit_channel_g
     }
 
     private fun showChannels(channels: List<Subscription>, query: String?) {
-        binding.channelsRV.adapter = SubscriptionGroupChannelsAdapter(
-            channels.filter { query == null || it.name.lowercase().contains(query.lowercase()) },
-            channelGroupsModel.groupToEdit!!
-        ) {
-            channelGroupsModel.groupToEdit = it
-            updateConfirmStatus()
-        }
         binding.subscriptionsContainer.isVisible = true
         binding.progress.isVisible = false
+
+        channelsAdapter.submitList(
+            channels.filter { query == null || it.name.lowercase().contains(query.lowercase()) }
+        )
     }
 
     private fun updateConfirmStatus() {

app/src/main/java/com/github/libretube/ui/views/DescriptionLayout.kt

@@ -10,7 +10,6 @@ import androidx.core.text.method.LinkMovementMethodCompat
 import androidx.core.text.parseAsHtml
 import androidx.core.view.isGone
 import androidx.core.view.isVisible
-import androidx.recyclerview.widget.LinearLayoutManager
 import com.github.libretube.R
 import com.github.libretube.api.obj.Segment
 import com.github.libretube.api.obj.Streams
@@ -33,6 +32,8 @@ class DescriptionLayout(
     private var streams: Streams? = null
     var handleLink: (link: String) -> Unit = {}
 
+    private val videoTagsAdapter = VideoTagsAdapter()
+
     init {
         binding.playerTitleLayout.setOnClickListener {
             toggleDescription()
@@ -41,6 +42,8 @@ class DescriptionLayout(
             streams?.title?.let { ClipboardHelper.save(context, text = it) }
             true
         }
+
+        binding.tagsRecycler.adapter = videoTagsAdapter
     }
 
     fun setSegments(segments: List<Segment>) {
@@ -101,9 +104,7 @@ class DescriptionLayout(
                 "${context?.getString(R.string.visibility)}: $visibility"
 
             if (streams.tags.isNotEmpty()) {
-                binding.tagsRecycler.layoutManager =
+                videoTagsAdapter.submitList(streams.tags)
-                    LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false)
-                binding.tagsRecycler.adapter = VideoTagsAdapter(streams.tags)
             }
             binding.tagsRecycler.isVisible = streams.tags.isNotEmpty()
 

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

@@ -20,8 +20,8 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:checkable="false"
-            android:visibility="gone"
+            android:text="Sponsor"
-            android:text="Sponsor"/>
+            android:visibility="gone" />
 
     </LinearLayout>
 
@@ -133,7 +133,9 @@
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/tags_recycler"
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content" />
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
 
     </LinearLayout>
 

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

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -48,7 +49,9 @@
                 android:id="@+id/groupsRV"
                 android:layout_width="match_parent"
                 android:layout_height="0dp"
-                android:layout_weight="1" />
+                android:layout_weight="1"
+                app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+                tools:listitem="@layout/add_channel_to_group_row" />
 
             <LinearLayout
                 android:layout_width="wrap_content"

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

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -35,10 +36,12 @@
                     android:id="@+id/featuredRV"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:paddingHorizontal="10dp"
                     android:clipToPadding="false"
                     android:nestedScrollingEnabled="false"
-                    android:visibility="gone" />
+                    android:orientation="horizontal"
+                    android:paddingHorizontal="10dp"
+                    android:visibility="gone"
+                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
 
                 <TextView
                     android:id="@+id/watchingTV"
@@ -49,10 +52,12 @@
                     android:id="@+id/watchingRV"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
-                    android:paddingHorizontal="10dp"
                     android:clipToPadding="false"
                     android:nestedScrollingEnabled="false"
-                    android:visibility="gone" />
+                    android:orientation="horizontal"
+                    android:paddingHorizontal="10dp"
+                    android:visibility="gone"
+                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
 
                 <TextView
                     android:id="@+id/trendingTV"
@@ -70,7 +75,9 @@
                         android:layout_height="wrap_content"
                         android:layout_marginHorizontal="10dp"
                         android:nestedScrollingEnabled="false"
-                        android:visibility="gone" />
+                        android:visibility="gone"
+                        app:layoutManager="androidx.recyclerview.widget.GridLayoutManager"
+                        app:spanCount="2" />
 
                 </RelativeLayout>
 
@@ -84,7 +91,9 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:nestedScrollingEnabled="false"
-                    android:visibility="gone" />
+                    android:orientation="horizontal"
+                    android:visibility="gone"
+                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
 
                 <TextView
                     android:id="@+id/playlistsTV"
@@ -96,7 +105,8 @@
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:nestedScrollingEnabled="false"
-                    android:visibility="gone" />
+                    android:visibility="gone"
+                    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
 
             </LinearLayout>
 
@@ -134,8 +144,8 @@
             android:layout_height="50dp"
             android:layout_gravity="center"
             android:layout_marginTop="30dp"
-            android:textSize="12sp"
+            android:text="@string/retry"
-            android:text="@string/retry"/>
+            android:textSize="12sp" />
 
         <com.google.android.material.button.MaterialButton
             android:id="@+id/change_instance"
@@ -144,8 +154,8 @@
             android:layout_height="50dp"
             android:layout_gravity="center"
             android:layout_marginTop="5dp"
-            android:textSize="12sp"
+            android:text="@string/change_instance"
-            android:text="@string/change_instance"/>
+            android:textSize="12sp" />
     </LinearLayout>
 
 </FrameLayout>

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

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout 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:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -9,7 +10,10 @@
         android:id="@+id/suggestions_recycler"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_marginVertical="10dp" />
+        android:layout_marginVertical="10dp"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+        app:reverseLayout="true"
+        app:stackFromEnd="true" />
 
     <LinearLayout
         android:id="@+id/history_empty"