Fix many compilation warnings

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupCreateService.kt

@@ -84,9 +84,6 @@ class BackupCreateService : IntentService(NAME) {
         // Create root object
         val root = JsonObject()
 
-        // Create information object
-        val information = JsonObject()
-
         // Create manga array
         val mangaEntries = JsonArray()
 

app/src/main/java/eu/kanade/tachiyomi/data/backup/BackupRestoreService.kt

@@ -317,8 +317,8 @@ class BackupRestoreService : Service() {
                     manga
                 }
                 .filter { it.id != null }
-                .flatMap { manga ->
-                    chapterFetchObservable(source, manga, chapters)
+                .flatMap {
+                    chapterFetchObservable(source, it, chapters)
                             // Convert to the manga that contains new chapters.
                             .map { manga }
                 }

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadService.kt

@@ -122,7 +122,7 @@ class DownloadService : Service() {
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe({ state -> onNetworkStateChanged(state)
-                }, { error ->
+                }, { _ ->
                     toast(R.string.download_queue_error)
                     stopSelf()
                 })

app/src/main/java/eu/kanade/tachiyomi/data/download/Downloader.kt

@@ -287,7 +287,7 @@ class Downloader(private val context: Context, private val provider: DownloadPro
         }
 
         return pageListObservable
-                .doOnNext { pages ->
+                .doOnNext { _ ->
                     // Delete all temporary (unfinished) files
                     tmpDir.listFiles()
                             ?.filter { it.name!!.endsWith(".tmp") }
@@ -303,7 +303,7 @@ class Downloader(private val context: Context, private val provider: DownloadPro
                 // Do when page is downloaded.
                 .doOnNext { notifier.onProgressChange(download, queue) }
                 .toList()
-                .map { pages -> download }
+                .map { _ -> download }
                 // Do after download completes
                 .doOnNext { ensureSuccessfulDownload(download, tmpDir, chapterDirname) }
                 // If the page list threw, it will resume here

app/src/main/java/eu/kanade/tachiyomi/network/PersistentCookieStore.kt

@@ -17,7 +17,7 @@ class PersistentCookieStore(context: Context) {
             val cookies = value as? Set<String>
             if (cookies != null) {
                 try {
-                    val url = HttpUrl.parse("http://$key")
+                    val url = HttpUrl.parse("http://$key") ?: continue
                     val nonExpiredCookies = cookies.mapNotNull { Cookie.parse(url, it) }
                             .filter { !it.hasExpired() }
                     cookieMap.put(key, nonExpiredCookies)

app/src/main/java/eu/kanade/tachiyomi/source/LocalSource.kt

@@ -76,13 +76,13 @@ class LocalSource(private val context: Context) : CatalogueSource {
         val state = ((if (filters.isEmpty()) POPULAR_FILTERS else filters)[0] as OrderBy).state
         when (state?.index) {
             0 -> {
-                if (state!!.ascending)
+                if (state.ascending)
                     mangaDirs = mangaDirs.sortedBy { it.name.toLowerCase(Locale.ENGLISH) }
                 else
                     mangaDirs = mangaDirs.sortedByDescending { it.name.toLowerCase(Locale.ENGLISH) }
             }
             1 -> {
-                if (state!!.ascending)
+                if (state.ascending)
                     mangaDirs = mangaDirs.sortedBy(File::lastModified)
                 else
                     mangaDirs = mangaDirs.sortedByDescending(File::lastModified)

app/src/main/java/eu/kanade/tachiyomi/ui/catalogue/filter/SelectItem.kt

@@ -32,8 +32,8 @@ open class SelectItem(val filter: Filter.Select<*>) : AbstractFlexibleItem<Selec
                 android.R.layout.simple_spinner_item, filter.values).apply {
             setDropDownViewResource(R.layout.common_spinner_item)
         }
-        spinner.onItemSelectedListener = IgnoreFirstSpinnerListener { position ->
-            filter.state = position
+        spinner.onItemSelectedListener = IgnoreFirstSpinnerListener { pos ->
+            filter.state = pos
         }
         spinner.setSelection(filter.state)
     }

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

@@ -33,7 +33,7 @@ class DownloadPresenter : BasePresenter<DownloadController>() {
         downloadQueue.getUpdatedObservable()
                 .observeOn(AndroidSchedulers.mainThread())
                 .map { ArrayList(it) }
-                .subscribeLatestCache(DownloadController::onNextDownloads, { view, error ->
+                .subscribeLatestCache(DownloadController::onNextDownloads, { _, error ->
                     Timber.e(error)
                 })
     }

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

@@ -67,7 +67,7 @@ class TrackPresenter(
                 .toList()
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribeFirst({ view, result -> view.onRefreshDone() },
+                .subscribeFirst({ view, _ -> view.onRefreshDone() },
                         TrackController::onRefreshError)
     }
 
@@ -99,7 +99,7 @@ class TrackPresenter(
                 .flatMap { db.insertTrack(track).asRxObservable() }
                 .subscribeOn(Schedulers.io())
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribeFirst({ view, result -> view.onRefreshDone() },
+                .subscribeFirst({ view, _ -> view.onRefreshDone() },
                         { view, error ->
                             view.onRefreshError(error)
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt

@@ -176,8 +176,8 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
                         .content(getString(R.string.confirm_update_manga_sync, chapterToUpdate))
                         .positiveText(android.R.string.yes)
                         .negativeText(android.R.string.no)
-                        .onPositive { dialog, which -> presenter.updateTrackLastChapterRead(chapterToUpdate) }
-                        .onAny { dialog1, which1 -> super.onBackPressed() }
+                        .onPositive { _, _ -> presenter.updateTrackLastChapterRead(chapterToUpdate) }
+                        .onAny { _, _ -> super.onBackPressed() }
                         .show()
             } else {
                 presenter.updateTrackLastChapterRead(chapterToUpdate)
@@ -237,7 +237,7 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
                 .title(getString(R.string.options))
                 .items(R.array.reader_image_options)
                 .itemsIds(R.array.reader_image_options_values)
-                .itemsCallback { materialDialog, view, i, charSequence ->
+                .itemsCallback { _, _, i, _ ->
                     when (i) {
                         0 -> setImageAsCover(page)
                         1 -> shareImage(page)
@@ -378,7 +378,7 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
 
     private fun initializeBottomMenu() {
         // Intercept all events in this layout
-        reader_menu_bottom.setOnTouchListener { v, event -> true }
+        reader_menu_bottom.setOnTouchListener { _, _ -> true }
 
         page_seekbar.setOnSeekBarChangeListener(object : SimpleSeekBarListener() {
             override fun onProgressChanged(seekBar: SeekBar, value: Int, fromUser: Boolean) {
@@ -595,7 +595,7 @@ class ReaderActivity : BaseRxActivity<ReaderPresenter>() {
                 .content(getString(R.string.confirm_set_image_as_cover))
                 .positiveText(android.R.string.yes)
                 .negativeText(android.R.string.no)
-                .onPositive { dialog, which -> presenter.setImageAsCover(page) }
+                .onPositive { _, _ -> presenter.setImageAsCover(page) }
                 .show()
 
     }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderCustomFilterDialog.kt

@@ -106,12 +106,12 @@ class ReaderCustomFilterDialog : DialogFragment() {
 
         // Set listeners
         switch_color_filter.isChecked = preferences.colorFilter().getOrDefault()
-        switch_color_filter.setOnCheckedChangeListener { v, isChecked ->
+        switch_color_filter.setOnCheckedChangeListener { _, isChecked ->
             preferences.colorFilter().set(isChecked)
         }
 
         custom_brightness.isChecked = preferences.customBrightness().getOrDefault()
-        custom_brightness.setOnCheckedChangeListener { v, isChecked ->
+        custom_brightness.setOnCheckedChangeListener { _, isChecked ->
             preferences.customBrightness().set(isChecked)
         }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderPresenter.kt

@@ -153,7 +153,7 @@ class ReaderPresenter(
 
         restartableLatestCache(LOAD_ACTIVE_CHAPTER,
                 { loadChapterObservable(chapter) },
-                { view, chapter -> view.onChapterReady(this.chapter) },
+                { view, _ -> view.onChapterReady(this.chapter) },
                 { view, error -> view.onChapterError(error) })
 
         if (savedState == null) {
@@ -314,7 +314,7 @@ class ReaderPresenter(
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribeLatestCache({ view, chapter ->
                     view.onAppendChapter(chapter)
-                }, { view, error ->
+                }, { view, _ ->
                     view.onChapterAppendError()
                 })
     }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderSettingsDialog.kt

@@ -75,17 +75,17 @@ class ReaderSettingsDialog : DialogFragment() {
         background_color.setSelection(preferences.readerTheme().getOrDefault(), false)
 
         show_page_number.isChecked = preferences.showPageNumber().getOrDefault()
-        show_page_number.setOnCheckedChangeListener { v, isChecked ->
+        show_page_number.setOnCheckedChangeListener { _, isChecked ->
             preferences.showPageNumber().set(isChecked)
         }
 
         fullscreen.isChecked = preferences.fullscreen().getOrDefault()
-        fullscreen.setOnCheckedChangeListener { v, isChecked ->
+        fullscreen.setOnCheckedChangeListener { _, isChecked ->
             preferences.fullscreen().set(isChecked)
         }
 
         crop_borders.isChecked = preferences.cropBorders().getOrDefault()
-        crop_borders.setOnCheckedChangeListener { v, isChecked ->
+        crop_borders.setOnCheckedChangeListener { _, isChecked ->
             preferences.cropBorders().set(isChecked)
         }
     }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/pager/PageView.kt

@@ -70,7 +70,7 @@ class PageView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
             setBitmapDecoderClass(reader.bitmapDecoderClass)
             setVerticalScrollingParent(reader is VerticalReader)
             setCropBorders(reader.cropBorders)
-            setOnTouchListener { v, motionEvent -> reader.gestureDetector.onTouchEvent(motionEvent) }
+            setOnTouchListener { _, motionEvent -> reader.gestureDetector.onTouchEvent(motionEvent) }
             setOnLongClickListener { reader.onLongClick(page) }
             setOnImageEventListener(object : SubsamplingScaleImageView.DefaultOnImageEventListener() {
                 override fun onReady() {
@@ -83,7 +83,7 @@ class PageView @JvmOverloads constructor(context: Context, attrs: AttributeSet?
             })
         }
 
-        retry_button.setOnTouchListener { v, event ->
+        retry_button.setOnTouchListener { _, event ->
             if (event.action == MotionEvent.ACTION_UP) {
                 activity.presenter.retryPage(page)
             }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonAdapter.kt

@@ -22,7 +22,7 @@ class WebtoonAdapter(val fragment: WebtoonReader) : RecyclerView.Adapter<Webtoon
     /**
      * Touch listener for images in holders.
      */
-    val touchListener = View.OnTouchListener { v, ev -> fragment.imageGestureDetector.onTouchEvent(ev) }
+    val touchListener = View.OnTouchListener { _, ev -> fragment.imageGestureDetector.onTouchEvent(ev) }
 
     /**
      * Returns the number of pages.

app/src/main/java/eu/kanade/tachiyomi/ui/setting/AnilistLoginActivity.kt

@@ -30,7 +30,7 @@ class AnilistLoginActivity : AppCompatActivity() {
                     .observeOn(AndroidSchedulers.mainThread())
                     .subscribe({
                         returnToSettings()
-                    }, { error ->
+                    }, { _ ->
                         returnToSettings()
                     })
         } else {

app/src/main/java/eu/kanade/tachiyomi/util/ContextExtensions.kt

@@ -143,6 +143,7 @@ fun Context.unregisterLocalReceiver(receiver: BroadcastReceiver) {
 fun Context.isServiceRunning(serviceClass: Class<*>): Boolean {
     val className = serviceClass.name
     val manager = getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
+    @Suppress("DEPRECATION")
     return manager.getRunningServices(Integer.MAX_VALUE)
             .any { className == it.service.className }
 }

app/src/main/java/eu/kanade/tachiyomi/widget/FABAnimationBase.kt

@@ -10,15 +10,16 @@ abstract class FABAnimationBase : FloatingActionButton.Behavior() {
     var isAnimatingOut = false
 
     override fun onStartNestedScroll(coordinatorLayout: CoordinatorLayout, child: FloatingActionButton,
-                                     directTargetChild: View, target: View, nestedScrollAxes: Int): Boolean {
+                                     directTargetChild: View, target: View, axes: Int, type: Int): Boolean {
         // Ensure we react to vertical scrolling
-        return nestedScrollAxes == ViewCompat.SCROLL_AXIS_VERTICAL ||
-                super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, nestedScrollAxes)
+        return axes == ViewCompat.SCROLL_AXIS_VERTICAL ||
+                super.onStartNestedScroll(coordinatorLayout, child, directTargetChild, target, axes, type)
     }
 
-    override fun onNestedScroll(coordinatorLayout: CoordinatorLayout, child: FloatingActionButton, target: View,
-                                dxConsumed: Int, dyConsumed: Int, dxUnconsumed: Int, dyUnconsumed: Int) {
-        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed)
+    override fun onNestedScroll(coordinatorLayout: CoordinatorLayout, child: FloatingActionButton,
+                                target: View, dxConsumed: Int, dyConsumed: Int, dxUnconsumed: Int,
+                                dyUnconsumed: Int, type: Int) {
+        super.onNestedScroll(coordinatorLayout, child, target, dxConsumed, dyConsumed, dxUnconsumed, dyUnconsumed, type)
         if (dyConsumed > 0 && !isAnimatingOut && child.visibility == View.VISIBLE) {
             // User scrolled down and the FAB is currently visible -> hide the FAB
             animateOut(child)

app/src/main/java/eu/kanade/tachiyomi/widget/FABAnimationUpDown.kt

@@ -9,6 +9,7 @@ import android.view.animation.Animation
 import android.view.animation.AnimationUtils
 import eu.kanade.tachiyomi.R
 
+@Suppress("unused", "UNUSED_PARAMETER")
 class FABAnimationUpDown @JvmOverloads constructor(ctx: Context, attrs: AttributeSet? = null) : FABAnimationBase() {
 
     private val INTERPOLATOR = FastOutSlowInInterpolator()

app/src/main/java/eu/kanade/tachiyomi/widget/SimpleNavigationView.kt

@@ -48,6 +48,7 @@ open class SimpleNavigationView @JvmOverloads constructor(
                     R.styleable.NavigationView_elevation, 0).toFloat())
         }
 
+        @Suppress("DEPRECATION")
         ViewCompat.setFitsSystemWindows(this,
                 a.getBoolean(R.styleable.NavigationView_android_fitsSystemWindows, false))
 
@@ -61,6 +62,7 @@ open class SimpleNavigationView @JvmOverloads constructor(
     /**
      * Overriden to measure the width of the navigation view.
      */
+    @SuppressLint("SwitchIntDef")
     override fun onMeasure(widthSpec: Int, heightSpec: Int) {
         val width = when (MeasureSpec.getMode(widthSpec)) {
             MeasureSpec.AT_MOST -> MeasureSpec.makeMeasureSpec(

app/src/main/java/eu/kanade/tachiyomi/widget/preference/LoginDialogPreference.kt

@@ -31,14 +31,14 @@ abstract class LoginDialogPreference(bundle: Bundle? = null) : DialogController(
                 .negativeText(android.R.string.cancel)
                 .build()
 
-        onViewCreated(dialog.view, savedState)
+        onViewCreated(dialog.view)
 
         return dialog
     }
 
-    fun onViewCreated(view: View, savedState: Bundle?) {
+    fun onViewCreated(view: View) {
         v = view.apply {
-            show_password.setOnCheckedChangeListener { v, isChecked ->
+            show_password.setOnCheckedChangeListener { _, isChecked ->
                 if (isChecked)
                     password.transformationMethod = null
                 else