Minor cleanup, remove some usages of ArrayList

app/src/main/java/eu/kanade/tachiyomi/ui/browse/extension/ExtensionPreferencesController.kt

@@ -78,15 +78,15 @@ class ExtensionPreferencesController(bundle: Bundle? = null) :
 
         val multiSource = extension.sources.size > 1
 
-        for (source in extension.sources) {
-            if (source is ConfigurableSource) {
+        extension.sources
+            .filterIsInstance<ConfigurableSource>()
+            .forEach { source ->
                 try {
                     addPreferencesForSource(screen, source, multiSource)
                 } catch (e: AbstractMethodError) {
                     Timber.e("Source did not implement [addPreferencesForSource]: ${source.name}")
                 }
             }
-        }
 
         manager.setPreferences(screen)
 

app/src/main/java/eu/kanade/tachiyomi/ui/download/DownloadController.kt

@@ -14,7 +14,6 @@ import eu.kanade.tachiyomi.databinding.DownloadControllerBinding
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.ui.base.controller.NucleusController
 import eu.kanade.tachiyomi.ui.main.offsetAppbarHeight
-import java.util.HashMap
 import java.util.concurrent.TimeUnit
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -39,7 +38,7 @@ class DownloadController :
     /**
      * Map of subscriptions for active downloads.
      */
-    private val progressSubscriptions by lazy { HashMap<Download, Subscription>() }
+    private val progressSubscriptions by lazy { mutableMapOf<Download, Subscription>() }
 
     /**
      * Whether the download queue is running or not.

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryPresenter.kt

@@ -22,7 +22,6 @@ import eu.kanade.tachiyomi.util.lang.isNullOrUnsubscribed
 import eu.kanade.tachiyomi.util.lang.launchIO
 import eu.kanade.tachiyomi.util.removeCovers
 import eu.kanade.tachiyomi.util.updateCoverLastModified
-import java.util.ArrayList
 import java.util.Collections
 import java.util.Comparator
 import rx.Observable
@@ -348,7 +347,7 @@ class LibraryPresenter(
      * @param mangas the list of manga to move.
      */
     fun moveMangasToCategories(categories: List<Category>, mangas: List<Manga>) {
-        val mc = ArrayList<MangaCategory>()
+        val mc = mutableListOf<MangaCategory>()
 
         for (manga in mangas) {
             for (cat in categories) {

app/src/main/java/eu/kanade/tachiyomi/ui/manga/chapter/ChaptersPresenter.kt

@@ -24,9 +24,6 @@ import timber.log.Timber
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 
-/**
- * Presenter of [ChaptersController].
- */
 class ChaptersPresenter(
     val manga: Manga,
     val source: Source,
@@ -47,8 +44,9 @@ class ChaptersPresenter(
     /**
      * Subject of list of chapters to allow updating the view without going to DB.
      */
-    val chaptersRelay: PublishRelay<List<ChapterItem>>
-    by lazy { PublishRelay.create<List<ChapterItem>>() }
+    private val chaptersRelay: PublishRelay<List<ChapterItem>> by lazy {
+        PublishRelay.create<List<ChapterItem>>()
+    }
 
     /**
      * Whether the chapter list has been requested to the source.
@@ -144,11 +142,9 @@ class ChaptersPresenter(
      * @param chapters the list of chapter from the database.
      */
     private fun setDownloadedChapters(chapters: List<ChapterItem>) {
-        for (chapter in chapters) {
-            if (downloadManager.isChapterDownloaded(chapter, manga)) {
-                chapter.status = Download.DOWNLOADED
-            }
-        }
+        chapters
+            .filter { downloadManager.isChapterDownloaded(it, manga) }
+            .forEach { it.status = Download.DOWNLOADED }
     }
 
     /**
@@ -222,7 +218,7 @@ class ChaptersPresenter(
      * Called when a download for the active manga changes status.
      * @param download the download whose status changed.
      */
-    fun onDownloadStatusChange(download: Download) {
+    private fun onDownloadStatusChange(download: Download) {
         // Assign the download to the model object.
         if (download.status == Download.QUEUE) {
             chapters.find { it.id == download.chapter.id }?.let {

app/src/main/java/eu/kanade/tachiyomi/ui/manga/track/TrackSearchAdapter.kt

@@ -10,7 +10,6 @@ import eu.kanade.tachiyomi.data.glide.GlideApp
 import eu.kanade.tachiyomi.data.track.model.TrackSearch
 import eu.kanade.tachiyomi.util.view.gone
 import eu.kanade.tachiyomi.util.view.inflate
-import java.util.ArrayList
 import kotlinx.android.synthetic.main.track_search_item.view.track_search_cover
 import kotlinx.android.synthetic.main.track_search_item.view.track_search_start
 import kotlinx.android.synthetic.main.track_search_item.view.track_search_start_result
@@ -22,7 +21,7 @@ import kotlinx.android.synthetic.main.track_search_item.view.track_search_type
 import kotlinx.android.synthetic.main.track_search_item.view.track_search_type_result
 
 class TrackSearchAdapter(context: Context) :
-    ArrayAdapter<TrackSearch>(context, R.layout.track_search_item, ArrayList<TrackSearch>()) {
+    ArrayAdapter<TrackSearch>(context, R.layout.track_search_item, mutableListOf<TrackSearch>()) {
 
     override fun getView(position: Int, view: View?, parent: ViewGroup): View {
         var v = view