diff --git a/app/build.gradle b/app/build.gradle
index 500909c9a..a40c5b328 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -89,20 +89,20 @@ android {
 
 ext {
     icepickVersion = '3.2.0'
-    checkstyleVersion = '8.36.2'
+    checkstyleVersion = '8.37'
     stethoVersion = '1.5.1'
-    leakCanaryVersion = '2.2'
+    leakCanaryVersion = '2.5'
     exoPlayerVersion = '2.11.8'
     androidxLifecycleVersion = '2.2.0'
-    androidxRoomVersion = '2.2.5'
-    groupieVersion = '2.8.0'
-    markwonVersion = '4.3.1'
+    androidxRoomVersion = '2.3.0-alpha03'
+    groupieVersion = '2.8.1'
+    markwonVersion = '4.6.0'
     googleAutoServiceVersion = '1.0-rc7'
 }
 
 configurations {
     checkstyle
-//    ktlint
+    ktlint
 }
 
 checkstyle {
@@ -130,79 +130,81 @@ task runCheckstyle(type: Checkstyle) {
     }
 }
 
-//task runKtlint(type: JavaExec) {
-//    main = "com.pinterest.ktlint.Main"
-//    classpath = configurations.ktlint
-//    args "src/**/*.kt"
-//}
-//
-//task formatKtlint(type: JavaExec) {
-//    main = "com.pinterest.ktlint.Main"
-//    classpath = configurations.ktlint
-//    args "-F", "src/**/*.kt"
-//}
+def outputDir = "${project.buildDir}/reports/ktlint/"
+def inputFiles = project.fileTree(dir: "src", include: "**/*.kt")
+
+task runKtlint(type: JavaExec) {
+    inputs.files(inputFiles)
+    outputs.dir(outputDir)
+    main = "com.pinterest.ktlint.Main"
+    classpath = configurations.ktlint
+    args "src/**/*.kt"
+}
+
+task formatKtlint(type: JavaExec) {
+    inputs.files(inputFiles)
+    outputs.dir(outputDir)
+    main = "com.pinterest.ktlint.Main"
+    classpath = configurations.ktlint
+    args "-F", "src/**/*.kt"
+}
 
 afterEvaluate {
-    preDebugBuild.dependsOn runCheckstyle //, runKtlint
+    preDebugBuild.dependsOn formatKtlint, runCheckstyle, runKtlint
 }
 
 dependencies {
-    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.0.10'
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.1'
 
-    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:${kotlin_version}"
 
     implementation "frankiesardo:icepick:${icepickVersion}"
     kapt "frankiesardo:icepick-processor:${icepickVersion}"
 
     checkstyle "com.puppycrawl.tools:checkstyle:${checkstyleVersion}"
-//    ktlint "com.pinterest:ktlint:0.35.0"
+    ktlint "com.pinterest:ktlint:0.39.0"
 
     debugImplementation "com.facebook.stetho:stetho:${stethoVersion}"
     debugImplementation "com.facebook.stetho:stetho-okhttp3:${stethoVersion}"
 
     debugImplementation "com.squareup.leakcanary:leakcanary-android:${leakCanaryVersion}"
     implementation "com.squareup.leakcanary:leakcanary-object-watcher-android:${leakCanaryVersion}"
+    implementation "com.squareup.leakcanary:plumber-android:${leakCanaryVersion}"
 
     implementation "androidx.multidex:multidex:2.0.1"
 
-    testImplementation 'junit:junit:4.13.1'
-    testImplementation 'org.mockito:mockito-core:3.3.3'
-
-    androidTestImplementation "androidx.test.ext:junit:1.1.1"
-    androidTestImplementation "androidx.room:room-testing:${androidxRoomVersion}"
-    androidTestImplementation "androidx.test.espresso:espresso-core:3.2.0", {
-        exclude module: 'support-annotations'
-    }
-
     // NewPipe dependencies
     // You can use a local version by uncommenting a few lines in settings.gradle
-    implementation 'com.github.TeamNewPipe:NewPipeExtractor:6701b0fe718f6bdc385221341fa473e8aaab560e'
+    implementation 'com.github.TeamNewPipe:NewPipeExtractor:650f0920fea535e08728d895d7b21f19c740817c'
     implementation "com.github.TeamNewPipe:nanojson:1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751"
 
     implementation "org.jsoup:jsoup:1.13.1"
 
+    //noinspection GradleDependency --> do not update okhttp to keep supporting Android 4.4 users
     implementation "com.squareup.okhttp3:okhttp:3.12.12"
 
     implementation "com.google.android.exoplayer:exoplayer:${exoPlayerVersion}"
     implementation "com.google.android.exoplayer:extension-mediasession:${exoPlayerVersion}"
 
-    implementation "com.google.android.material:material:1.1.0"
+    implementation "com.google.android.material:material:1.2.1"
 
     compileOnly "com.google.auto.service:auto-service-annotations:${googleAutoServiceVersion}"
     kapt "com.google.auto.service:auto-service:${googleAutoServiceVersion}"
 
-    implementation "androidx.appcompat:appcompat:1.1.0"
+    implementation "androidx.appcompat:appcompat:1.2.0"
     implementation "androidx.preference:preference:1.1.1"
     implementation "androidx.recyclerview:recyclerview:1.1.0"
     implementation "androidx.cardview:cardview:1.0.0"
-    implementation "androidx.constraintlayout:constraintlayout:1.1.3"
-    implementation 'androidx.core:core-ktx:1.3.1'
+    implementation "androidx.constraintlayout:constraintlayout:2.0.4"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.documentfile:documentfile:1.0.1'
+    implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.0.0'
 
     implementation "androidx.lifecycle:lifecycle-livedata:${androidxLifecycleVersion}"
     implementation "androidx.lifecycle:lifecycle-viewmodel:${androidxLifecycleVersion}"
 
     implementation "androidx.room:room-runtime:${androidxRoomVersion}"
-    implementation "androidx.room:room-rxjava2:${androidxRoomVersion}"
+    implementation "androidx.room:room-rxjava3:${androidxRoomVersion}"
     kapt "androidx.room:room-compiler:${androidxRoomVersion}"
 
     implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.1.0"
@@ -218,13 +220,22 @@ dependencies {
 
     implementation "com.nononsenseapps:filepicker:4.2.1"
 
-    implementation "ch.acra:acra-core:5.5.0"
+    implementation "ch.acra:acra-core:5.7.0"
 
-    implementation "io.reactivex.rxjava2:rxjava:2.2.19"
-    implementation "io.reactivex.rxjava2:rxandroid:2.1.1"
-    implementation "com.jakewharton.rxbinding2:rxbinding:2.2.0"
+    implementation "io.reactivex.rxjava3:rxjava:3.0.7"
+    implementation "io.reactivex.rxjava3:rxandroid:3.0.0"
+    implementation "com.jakewharton.rxbinding4:rxbinding:4.0.0"
 
     implementation "org.ocpsoft.prettytime:prettytime:4.0.6.Final"
+
+    testImplementation 'junit:junit:4.13.1'
+    testImplementation 'org.mockito:mockito-core:3.6.0'
+
+    androidTestImplementation "androidx.test.ext:junit:1.1.2"
+    androidTestImplementation "androidx.room:room-testing:${androidxRoomVersion}"
+    androidTestImplementation "androidx.test.espresso:espresso-core:3.3.0", {
+        exclude module: 'support-annotations'
+    }
 }
 
 static String getGitWorkingBranch() {
diff --git a/app/src/androidTest/java/org/schabi/newpipe/database/AppDatabaseTest.kt b/app/src/androidTest/java/org/schabi/newpipe/database/AppDatabaseTest.kt
index e37eb5db9..239c46f7a 100644
--- a/app/src/androidTest/java/org/schabi/newpipe/database/AppDatabaseTest.kt
+++ b/app/src/androidTest/java/org/schabi/newpipe/database/AppDatabaseTest.kt
@@ -31,49 +31,62 @@ class AppDatabaseTest {
     }
 
     @get:Rule
-    val testHelper = MigrationTestHelper(InstrumentationRegistry.getInstrumentation(),
-            AppDatabase::class.java.canonicalName, FrameworkSQLiteOpenHelperFactory())
+    val testHelper = MigrationTestHelper(
+        InstrumentationRegistry.getInstrumentation(),
+        AppDatabase::class.java.canonicalName, FrameworkSQLiteOpenHelperFactory()
+    )
 
     @Test
     fun migrateDatabaseFrom2to3() {
         val databaseInV2 = testHelper.createDatabase(AppDatabase.DATABASE_NAME, Migrations.DB_VER_2)
 
         databaseInV2.run {
-            insert("streams", SQLiteDatabase.CONFLICT_FAIL, ContentValues().apply {
-                // put("uid", null)
-                put("service_id", DEFAULT_SERVICE_ID)
-                put("url", DEFAULT_URL)
-                put("title", DEFAULT_TITLE)
-                put("stream_type", DEFAULT_TYPE.name)
-                put("duration", DEFAULT_DURATION)
-                put("uploader", DEFAULT_UPLOADER_NAME)
-                put("thumbnail_url", DEFAULT_THUMBNAIL)
-            })
-            insert("streams", SQLiteDatabase.CONFLICT_FAIL, ContentValues().apply {
-                // put("uid", null)
-                put("service_id", DEFAULT_SECOND_SERVICE_ID)
-                put("url", DEFAULT_SECOND_URL)
-                // put("title", null)
-                // put("stream_type", null)
-                // put("duration", null)
-                // put("uploader", null)
-                // put("thumbnail_url", null)
-            })
-            insert("streams", SQLiteDatabase.CONFLICT_FAIL, ContentValues().apply {
-                // put("uid", null)
-                put("service_id", DEFAULT_SERVICE_ID)
-                // put("url", null)
-                // put("title", null)
-                // put("stream_type", null)
-                // put("duration", null)
-                // put("uploader", null)
-                // put("thumbnail_url", null)
-            })
+            insert(
+                "streams", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    // put("uid", null)
+                    put("service_id", DEFAULT_SERVICE_ID)
+                    put("url", DEFAULT_URL)
+                    put("title", DEFAULT_TITLE)
+                    put("stream_type", DEFAULT_TYPE.name)
+                    put("duration", DEFAULT_DURATION)
+                    put("uploader", DEFAULT_UPLOADER_NAME)
+                    put("thumbnail_url", DEFAULT_THUMBNAIL)
+                }
+            )
+            insert(
+                "streams", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    // put("uid", null)
+                    put("service_id", DEFAULT_SECOND_SERVICE_ID)
+                    put("url", DEFAULT_SECOND_URL)
+                    // put("title", null)
+                    // put("stream_type", null)
+                    // put("duration", null)
+                    // put("uploader", null)
+                    // put("thumbnail_url", null)
+                }
+            )
+            insert(
+                "streams", SQLiteDatabase.CONFLICT_FAIL,
+                ContentValues().apply {
+                    // put("uid", null)
+                    put("service_id", DEFAULT_SERVICE_ID)
+                    // put("url", null)
+                    // put("title", null)
+                    // put("stream_type", null)
+                    // put("duration", null)
+                    // put("uploader", null)
+                    // put("thumbnail_url", null)
+                }
+            )
             close()
         }
 
-        testHelper.runMigrationsAndValidate(AppDatabase.DATABASE_NAME, Migrations.DB_VER_3,
-                true, Migrations.MIGRATION_2_3)
+        testHelper.runMigrationsAndValidate(
+            AppDatabase.DATABASE_NAME, Migrations.DB_VER_3,
+            true, Migrations.MIGRATION_2_3
+        )
 
         val migratedDatabaseV3 = getMigratedDatabase()
         val listFromDB = migratedDatabaseV3.streamDAO().all.blockingFirst()
@@ -110,9 +123,11 @@ class AppDatabaseTest {
     }
 
     private fun getMigratedDatabase(): AppDatabase {
-        val database: AppDatabase = Room.databaseBuilder(ApplicationProvider.getApplicationContext(),
-                AppDatabase::class.java, AppDatabase.DATABASE_NAME)
-                .build()
+        val database: AppDatabase = Room.databaseBuilder(
+            ApplicationProvider.getApplicationContext(),
+            AppDatabase::class.java, AppDatabase.DATABASE_NAME
+        )
+            .build()
         testHelper.closeWhenFinished(database)
         return database
     }
diff --git a/app/src/debug/java/org/schabi/newpipe/DebugApp.kt b/app/src/debug/java/org/schabi/newpipe/DebugApp.kt
index 3ace75f0b..600851c81 100644
--- a/app/src/debug/java/org/schabi/newpipe/DebugApp.kt
+++ b/app/src/debug/java/org/schabi/newpipe/DebugApp.kt
@@ -15,14 +15,22 @@ class DebugApp : App() {
 
         // Give each object 10 seconds to be GC'ed, before LeakCanary gets nosy on it
         AppWatcher.config = AppWatcher.config.copy(watchDurationMillis = 10000)
-        LeakCanary.config = LeakCanary.config.copy(dumpHeap = PreferenceManager
-                .getDefaultSharedPreferences(this).getBoolean(getString(
-                        R.string.allow_heap_dumping_key), false))
+        LeakCanary.config = LeakCanary.config.copy(
+            dumpHeap = PreferenceManager
+                .getDefaultSharedPreferences(this).getBoolean(
+                    getString(
+                        R.string.allow_heap_dumping_key
+                    ),
+                    false
+                )
+        )
     }
 
     override fun getDownloader(): Downloader {
-        val downloader = DownloaderImpl.init(OkHttpClient.Builder()
-                .addNetworkInterceptor(StethoInterceptor()))
+        val downloader = DownloaderImpl.init(
+            OkHttpClient.Builder()
+                .addNetworkInterceptor(StethoInterceptor())
+        )
         setCookiesToDownloader(downloader)
         return downloader
     }
@@ -36,7 +44,8 @@ class DebugApp : App() {
 
         // Enable command line interface
         initializerBuilder.enableDumpapp(
-                Stetho.defaultDumperPluginsProvider(applicationContext))
+            Stetho.defaultDumperPluginsProvider(applicationContext)
+        )
 
         // Use the InitializerBuilder to generate an Initializer
         val initializer = initializerBuilder.build()
@@ -47,6 +56,6 @@ class DebugApp : App() {
 
     override fun isDisposedRxExceptionsReported(): Boolean {
         return PreferenceManager.getDefaultSharedPreferences(this)
-                .getBoolean(getString(R.string.allow_disposed_exceptions_key), false)
+            .getBoolean(getString(R.string.allow_disposed_exceptions_key), false)
     }
 }
diff --git a/app/src/main/java/org/schabi/newpipe/App.java b/app/src/main/java/org/schabi/newpipe/App.java
index 5348db115..de401d4f5 100644
--- a/app/src/main/java/org/schabi/newpipe/App.java
+++ b/app/src/main/java/org/schabi/newpipe/App.java
@@ -38,13 +38,13 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
-import io.reactivex.disposables.Disposable;
-import io.reactivex.exceptions.CompositeException;
-import io.reactivex.exceptions.MissingBackpressureException;
-import io.reactivex.exceptions.OnErrorNotImplementedException;
-import io.reactivex.exceptions.UndeliverableException;
-import io.reactivex.functions.Consumer;
-import io.reactivex.plugins.RxJavaPlugins;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.exceptions.CompositeException;
+import io.reactivex.rxjava3.exceptions.MissingBackpressureException;
+import io.reactivex.rxjava3.exceptions.OnErrorNotImplementedException;
+import io.reactivex.rxjava3.exceptions.UndeliverableException;
+import io.reactivex.rxjava3.functions.Consumer;
+import io.reactivex.rxjava3.plugins.RxJavaPlugins;
 
 /*
  * Copyright (C) Hans-Christoph Steiner 2016 <hans@eds.org>
diff --git a/app/src/main/java/org/schabi/newpipe/CheckForNewAppVersion.java b/app/src/main/java/org/schabi/newpipe/CheckForNewAppVersion.java
index 661337b28..4dfd1bdce 100644
--- a/app/src/main/java/org/schabi/newpipe/CheckForNewAppVersion.java
+++ b/app/src/main/java/org/schabi/newpipe/CheckForNewAppVersion.java
@@ -35,10 +35,10 @@ import java.security.cert.CertificateException;
 import java.security.cert.CertificateFactory;
 import java.security.cert.X509Certificate;
 
-import io.reactivex.Maybe;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Maybe;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public final class CheckForNewAppVersion {
     private CheckForNewAppVersion() { }
diff --git a/app/src/main/java/org/schabi/newpipe/RouterActivity.java b/app/src/main/java/org/schabi/newpipe/RouterActivity.java
index e14eeeba6..9ad993de1 100644
--- a/app/src/main/java/org/schabi/newpipe/RouterActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/RouterActivity.java
@@ -66,13 +66,13 @@ import java.util.List;
 
 import icepick.Icepick;
 import icepick.State;
-import io.reactivex.Observable;
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.Consumer;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Observable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.functions.Consumer;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.AUDIO;
 import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.VIDEO;
diff --git a/app/src/main/java/org/schabi/newpipe/about/License.kt b/app/src/main/java/org/schabi/newpipe/about/License.kt
index 00a66c84a..ed0c9927f 100644
--- a/app/src/main/java/org/schabi/newpipe/about/License.kt
+++ b/app/src/main/java/org/schabi/newpipe/about/License.kt
@@ -2,8 +2,8 @@ package org.schabi.newpipe.about
 
 import android.net.Uri
 import android.os.Parcelable
-import java.io.Serializable
 import kotlinx.android.parcel.Parcelize
+import java.io.Serializable
 
 /**
  * Class for storing information about a software license.
@@ -12,8 +12,8 @@ import kotlinx.android.parcel.Parcelize
 class License(val name: String, val abbreviation: String, val filename: String) : Parcelable, Serializable {
     val contentUri: Uri
         get() = Uri.Builder()
-                .scheme("file")
-                .path("/android_asset")
-                .appendPath(filename)
-                .build()
+            .scheme("file")
+            .path("/android_asset")
+            .appendPath(filename)
+            .build()
 }
diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java b/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
index bac789dbd..8367a75dc 100644
--- a/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/about/LicenseFragment.java
@@ -20,7 +20,7 @@ import java.io.Serializable;
 import java.util.Arrays;
 import java.util.Comparator;
 
-import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
 
 /**
  * Fragment containing the software licenses.
diff --git a/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java b/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java
index a58f27898..b0241049d 100644
--- a/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java
+++ b/app/src/main/java/org/schabi/newpipe/about/LicenseFragmentHelper.java
@@ -16,11 +16,10 @@ import java.io.IOException;
 import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 
-import io.reactivex.Observable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.disposables.Disposables;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Observable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 import static org.schabi.newpipe.util.Localization.assureCorrectAppLanguage;
 
@@ -55,7 +54,7 @@ public final class LicenseFragmentHelper {
     }
 
     /**
-     * @param context
+     * @param context the Android context
      * @return String which is a CSS stylesheet according to the context's theme
      */
     private static String getLicenseStylesheet(@NonNull final Context context) {
@@ -86,7 +85,7 @@ public final class LicenseFragmentHelper {
 
     static Disposable showLicense(@Nullable final Context context, @NonNull final License license) {
         if (context == null) {
-            return Disposables.empty();
+            return Disposable.empty();
         }
 
         return Observable.fromCallable(() -> getFormattedLicense(context, license))
diff --git a/app/src/main/java/org/schabi/newpipe/database/BasicDAO.java b/app/src/main/java/org/schabi/newpipe/database/BasicDAO.java
index dd526ecc8..1b8540808 100644
--- a/app/src/main/java/org/schabi/newpipe/database/BasicDAO.java
+++ b/app/src/main/java/org/schabi/newpipe/database/BasicDAO.java
@@ -9,7 +9,7 @@ import androidx.room.Update;
 import java.util.Collection;
 import java.util.List;
 
-import io.reactivex.Flowable;
+import io.reactivex.rxjava3.core.Flowable;
 
 @Dao
 public interface BasicDAO<Entity> {
diff --git a/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedDAO.kt b/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedDAO.kt
index d8b4f72cc..f216ba1d8 100644
--- a/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedDAO.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedDAO.kt
@@ -6,19 +6,20 @@ import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Transaction
 import androidx.room.Update
-import io.reactivex.Flowable
-import java.time.OffsetDateTime
+import io.reactivex.rxjava3.core.Flowable
 import org.schabi.newpipe.database.feed.model.FeedEntity
 import org.schabi.newpipe.database.feed.model.FeedLastUpdatedEntity
 import org.schabi.newpipe.database.stream.model.StreamEntity
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
+import java.time.OffsetDateTime
 
 @Dao
 abstract class FeedDAO {
     @Query("DELETE FROM feed")
     abstract fun deleteAll(): Int
 
-    @Query("""
+    @Query(
+        """
         SELECT s.* FROM streams s
 
         INNER JOIN feed f
@@ -27,10 +28,12 @@ abstract class FeedDAO {
         ORDER BY s.upload_date IS NULL DESC, s.upload_date DESC, s.uploader ASC
 
         LIMIT 500
-        """)
+        """
+    )
     abstract fun getAllStreams(): Flowable<List<StreamEntity>>
 
-    @Query("""
+    @Query(
+        """
         SELECT s.* FROM streams s
 
         INNER JOIN feed f
@@ -46,10 +49,12 @@ abstract class FeedDAO {
 
         ORDER BY s.upload_date IS NULL DESC, s.upload_date DESC, s.uploader ASC
         LIMIT 500
-        """)
+        """
+    )
     abstract fun getAllStreamsFromGroup(groupId: Long): Flowable<List<StreamEntity>>
 
-    @Query("""
+    @Query(
+        """
         DELETE FROM feed WHERE
 
         feed.stream_id IN (
@@ -60,10 +65,12 @@ abstract class FeedDAO {
 
             WHERE s.upload_date < :offsetDateTime
         )
-        """)
+        """
+    )
     abstract fun unlinkStreamsOlderThan(offsetDateTime: OffsetDateTime)
 
-    @Query("""
+    @Query(
+        """
         DELETE FROM feed
         
         WHERE feed.subscription_id = :subscriptionId
@@ -76,7 +83,8 @@ abstract class FeedDAO {
 
             WHERE s.stream_type = "LIVE_STREAM" OR s.stream_type = "AUDIO_LIVE_STREAM"
         )
-        """)
+        """
+    )
     abstract fun unlinkOldLivestreams(subscriptionId: Long)
 
     @Insert(onConflict = OnConflictStrategy.IGNORE)
@@ -100,12 +108,14 @@ abstract class FeedDAO {
         }
     }
 
-    @Query("""
+    @Query(
+        """
         SELECT MIN(lu.last_updated) FROM feed_last_updated lu
 
         INNER JOIN feed_group_subscription_join fgs
         ON fgs.subscription_id = lu.subscription_id AND fgs.group_id = :groupId
-        """)
+        """
+    )
     abstract fun oldestSubscriptionUpdate(groupId: Long): Flowable<List<OffsetDateTime>>
 
     @Query("SELECT MIN(last_updated) FROM feed_last_updated")
@@ -114,7 +124,8 @@ abstract class FeedDAO {
     @Query("SELECT COUNT(*) FROM feed_last_updated WHERE last_updated IS NULL")
     abstract fun notLoadedCount(): Flowable<Long>
 
-    @Query("""
+    @Query(
+        """
         SELECT COUNT(*) FROM subscriptions s
         
         INNER JOIN feed_group_subscription_join fgs
@@ -124,20 +135,24 @@ abstract class FeedDAO {
         ON s.uid = lu.subscription_id 
 
         WHERE lu.last_updated IS NULL
-        """)
+        """
+    )
     abstract fun notLoadedCountForGroup(groupId: Long): Flowable<Long>
 
-    @Query("""
+    @Query(
+        """
         SELECT s.* FROM subscriptions s
 
         LEFT JOIN feed_last_updated lu
         ON s.uid = lu.subscription_id 
 
         WHERE lu.last_updated IS NULL OR lu.last_updated < :outdatedThreshold
-        """)
+        """
+    )
     abstract fun getAllOutdated(outdatedThreshold: OffsetDateTime): Flowable<List<SubscriptionEntity>>
 
-    @Query("""
+    @Query(
+        """
         SELECT s.* FROM subscriptions s
 
         INNER JOIN feed_group_subscription_join fgs
@@ -147,6 +162,7 @@ abstract class FeedDAO {
         ON s.uid = lu.subscription_id
 
         WHERE lu.last_updated IS NULL OR lu.last_updated < :outdatedThreshold
-        """)
+        """
+    )
     abstract fun getAllOutdatedForGroup(groupId: Long, outdatedThreshold: OffsetDateTime): Flowable<List<SubscriptionEntity>>
 }
diff --git a/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedGroupDAO.kt b/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedGroupDAO.kt
index c8700dea2..217eef03f 100644
--- a/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedGroupDAO.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/feed/dao/FeedGroupDAO.kt
@@ -6,8 +6,8 @@ import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Transaction
 import androidx.room.Update
-import io.reactivex.Flowable
-import io.reactivex.Maybe
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.core.Maybe
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.database.feed.model.FeedGroupSubscriptionEntity
 
diff --git a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedEntity.kt b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedEntity.kt
index 8a1eb65d4..beeedc62b 100644
--- a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedEntity.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedEntity.kt
@@ -10,21 +10,24 @@ import org.schabi.newpipe.database.feed.model.FeedEntity.Companion.SUBSCRIPTION_
 import org.schabi.newpipe.database.stream.model.StreamEntity
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
 
-@Entity(tableName = FEED_TABLE,
-        primaryKeys = [STREAM_ID, SUBSCRIPTION_ID],
-        indices = [Index(SUBSCRIPTION_ID)],
-        foreignKeys = [
-            ForeignKey(
-                    entity = StreamEntity::class,
-                    parentColumns = [StreamEntity.STREAM_ID],
-                    childColumns = [STREAM_ID],
-                    onDelete = ForeignKey.CASCADE, onUpdate = ForeignKey.CASCADE, deferred = true),
-            ForeignKey(
-                    entity = SubscriptionEntity::class,
-                    parentColumns = [SubscriptionEntity.SUBSCRIPTION_UID],
-                    childColumns = [SUBSCRIPTION_ID],
-                    onDelete = ForeignKey.CASCADE, onUpdate = ForeignKey.CASCADE, deferred = true)
-        ]
+@Entity(
+    tableName = FEED_TABLE,
+    primaryKeys = [STREAM_ID, SUBSCRIPTION_ID],
+    indices = [Index(SUBSCRIPTION_ID)],
+    foreignKeys = [
+        ForeignKey(
+            entity = StreamEntity::class,
+            parentColumns = [StreamEntity.STREAM_ID],
+            childColumns = [STREAM_ID],
+            onDelete = ForeignKey.CASCADE, onUpdate = ForeignKey.CASCADE, deferred = true
+        ),
+        ForeignKey(
+            entity = SubscriptionEntity::class,
+            parentColumns = [SubscriptionEntity.SUBSCRIPTION_UID],
+            childColumns = [SUBSCRIPTION_ID],
+            onDelete = ForeignKey.CASCADE, onUpdate = ForeignKey.CASCADE, deferred = true
+        )
+    ]
 )
 data class FeedEntity(
     @ColumnInfo(name = STREAM_ID)
diff --git a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupEntity.kt b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupEntity.kt
index e772168fd..1dd26946a 100644
--- a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupEntity.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupEntity.kt
@@ -9,8 +9,8 @@ import org.schabi.newpipe.database.feed.model.FeedGroupEntity.Companion.SORT_ORD
 import org.schabi.newpipe.local.subscription.FeedGroupIcon
 
 @Entity(
-        tableName = FEED_GROUP_TABLE,
-        indices = [Index(SORT_ORDER)]
+    tableName = FEED_GROUP_TABLE,
+    indices = [Index(SORT_ORDER)]
 )
 data class FeedGroupEntity(
     @PrimaryKey(autoGenerate = true)
diff --git a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupSubscriptionEntity.kt b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupSubscriptionEntity.kt
index eac6bddee..40f7d203b 100644
--- a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupSubscriptionEntity.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedGroupSubscriptionEntity.kt
@@ -11,22 +11,24 @@ import org.schabi.newpipe.database.feed.model.FeedGroupSubscriptionEntity.Compan
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
 
 @Entity(
-        tableName = FEED_GROUP_SUBSCRIPTION_TABLE,
-        primaryKeys = [GROUP_ID, SUBSCRIPTION_ID],
-        indices = [Index(SUBSCRIPTION_ID)],
-        foreignKeys = [
-            ForeignKey(
-                    entity = FeedGroupEntity::class,
-                    parentColumns = [FeedGroupEntity.ID],
-                    childColumns = [GROUP_ID],
-                    onDelete = CASCADE, onUpdate = CASCADE, deferred = true),
+    tableName = FEED_GROUP_SUBSCRIPTION_TABLE,
+    primaryKeys = [GROUP_ID, SUBSCRIPTION_ID],
+    indices = [Index(SUBSCRIPTION_ID)],
+    foreignKeys = [
+        ForeignKey(
+            entity = FeedGroupEntity::class,
+            parentColumns = [FeedGroupEntity.ID],
+            childColumns = [GROUP_ID],
+            onDelete = CASCADE, onUpdate = CASCADE, deferred = true
+        ),
 
-            ForeignKey(
-                    entity = SubscriptionEntity::class,
-                    parentColumns = [SubscriptionEntity.SUBSCRIPTION_UID],
-                    childColumns = [SUBSCRIPTION_ID],
-                    onDelete = CASCADE, onUpdate = CASCADE, deferred = true)
-        ]
+        ForeignKey(
+            entity = SubscriptionEntity::class,
+            parentColumns = [SubscriptionEntity.SUBSCRIPTION_UID],
+            childColumns = [SUBSCRIPTION_ID],
+            onDelete = CASCADE, onUpdate = CASCADE, deferred = true
+        )
+    ]
 )
 data class FeedGroupSubscriptionEntity(
     @ColumnInfo(name = GROUP_ID)
diff --git a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedLastUpdatedEntity.kt b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedLastUpdatedEntity.kt
index 069d1138f..a19af9c45 100644
--- a/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedLastUpdatedEntity.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/feed/model/FeedLastUpdatedEntity.kt
@@ -4,20 +4,21 @@ import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.ForeignKey
 import androidx.room.PrimaryKey
-import java.time.OffsetDateTime
 import org.schabi.newpipe.database.feed.model.FeedLastUpdatedEntity.Companion.FEED_LAST_UPDATED_TABLE
 import org.schabi.newpipe.database.feed.model.FeedLastUpdatedEntity.Companion.SUBSCRIPTION_ID
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
+import java.time.OffsetDateTime
 
 @Entity(
-        tableName = FEED_LAST_UPDATED_TABLE,
-        foreignKeys = [
-            ForeignKey(
-                    entity = SubscriptionEntity::class,
-                    parentColumns = [SubscriptionEntity.SUBSCRIPTION_UID],
-                    childColumns = [SUBSCRIPTION_ID],
-                    onDelete = ForeignKey.CASCADE, onUpdate = ForeignKey.CASCADE, deferred = true)
-        ]
+    tableName = FEED_LAST_UPDATED_TABLE,
+    foreignKeys = [
+        ForeignKey(
+            entity = SubscriptionEntity::class,
+            parentColumns = [SubscriptionEntity.SUBSCRIPTION_UID],
+            childColumns = [SUBSCRIPTION_ID],
+            onDelete = ForeignKey.CASCADE, onUpdate = ForeignKey.CASCADE, deferred = true
+        )
+    ]
 )
 data class FeedLastUpdatedEntity(
     @PrimaryKey
diff --git a/app/src/main/java/org/schabi/newpipe/database/history/dao/SearchHistoryDAO.java b/app/src/main/java/org/schabi/newpipe/database/history/dao/SearchHistoryDAO.java
index 972435859..a0010a419 100644
--- a/app/src/main/java/org/schabi/newpipe/database/history/dao/SearchHistoryDAO.java
+++ b/app/src/main/java/org/schabi/newpipe/database/history/dao/SearchHistoryDAO.java
@@ -8,7 +8,7 @@ import org.schabi.newpipe.database.history.model.SearchHistoryEntry;
 
 import java.util.List;
 
-import io.reactivex.Flowable;
+import io.reactivex.rxjava3.core.Flowable;
 
 import static org.schabi.newpipe.database.history.model.SearchHistoryEntry.CREATION_DATE;
 import static org.schabi.newpipe.database.history.model.SearchHistoryEntry.ID;
diff --git a/app/src/main/java/org/schabi/newpipe/database/history/dao/StreamHistoryDAO.java b/app/src/main/java/org/schabi/newpipe/database/history/dao/StreamHistoryDAO.java
index 8a9cab182..535f2d2d0 100644
--- a/app/src/main/java/org/schabi/newpipe/database/history/dao/StreamHistoryDAO.java
+++ b/app/src/main/java/org/schabi/newpipe/database/history/dao/StreamHistoryDAO.java
@@ -10,7 +10,7 @@ import org.schabi.newpipe.database.stream.StreamStatisticsEntry;
 
 import java.util.List;
 
-import io.reactivex.Flowable;
+import io.reactivex.rxjava3.core.Flowable;
 
 import static org.schabi.newpipe.database.history.model.StreamHistoryEntity.JOIN_STREAM_ID;
 import static org.schabi.newpipe.database.history.model.StreamHistoryEntity.STREAM_ACCESS_DATE;
diff --git a/app/src/main/java/org/schabi/newpipe/database/history/model/StreamHistoryEntry.kt b/app/src/main/java/org/schabi/newpipe/database/history/model/StreamHistoryEntry.kt
index b928b00bf..a93ba1652 100644
--- a/app/src/main/java/org/schabi/newpipe/database/history/model/StreamHistoryEntry.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/history/model/StreamHistoryEntry.kt
@@ -2,8 +2,8 @@ package org.schabi.newpipe.database.history.model
 
 import androidx.room.ColumnInfo
 import androidx.room.Embedded
-import java.time.OffsetDateTime
 import org.schabi.newpipe.database.stream.model.StreamEntity
+import java.time.OffsetDateTime
 
 data class StreamHistoryEntry(
     @Embedded
@@ -25,6 +25,6 @@ data class StreamHistoryEntry(
 
     fun hasEqualValues(other: StreamHistoryEntry): Boolean {
         return this.streamEntity.uid == other.streamEntity.uid && streamId == other.streamId &&
-                accessDate.isEqual(other.accessDate)
+            accessDate.isEqual(other.accessDate)
     }
 }
diff --git a/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistDAO.java b/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistDAO.java
index ad9c148ca..078385e56 100644
--- a/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistDAO.java
+++ b/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistDAO.java
@@ -8,7 +8,7 @@ import org.schabi.newpipe.database.playlist.model.PlaylistEntity;
 
 import java.util.List;
 
-import io.reactivex.Flowable;
+import io.reactivex.rxjava3.core.Flowable;
 
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_TABLE;
diff --git a/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistRemoteDAO.java b/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistRemoteDAO.java
index 23442ceff..a488f00fc 100644
--- a/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistRemoteDAO.java
+++ b/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistRemoteDAO.java
@@ -9,7 +9,7 @@ import org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity;
 
 import java.util.List;
 
-import io.reactivex.Flowable;
+import io.reactivex.rxjava3.core.Flowable;
 
 import static org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity.REMOTE_PLAYLIST_ID;
 import static org.schabi.newpipe.database.playlist.model.PlaylistRemoteEntity.REMOTE_PLAYLIST_SERVICE_ID;
diff --git a/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistStreamDAO.java b/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistStreamDAO.java
index a41f36d72..09da6aca0 100644
--- a/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistStreamDAO.java
+++ b/app/src/main/java/org/schabi/newpipe/database/playlist/dao/PlaylistStreamDAO.java
@@ -11,7 +11,7 @@ import org.schabi.newpipe.database.playlist.model.PlaylistStreamEntity;
 
 import java.util.List;
 
-import io.reactivex.Flowable;
+import io.reactivex.rxjava3.core.Flowable;
 
 import static org.schabi.newpipe.database.playlist.PlaylistMetadataEntry.PLAYLIST_STREAM_COUNT;
 import static org.schabi.newpipe.database.playlist.model.PlaylistEntity.PLAYLIST_ID;
diff --git a/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamDAO.kt b/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamDAO.kt
index 89757c17d..be8590382 100644
--- a/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamDAO.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamDAO.kt
@@ -6,14 +6,14 @@ import androidx.room.Insert
 import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Transaction
-import io.reactivex.Flowable
-import java.time.OffsetDateTime
+import io.reactivex.rxjava3.core.Flowable
 import org.schabi.newpipe.database.BasicDAO
 import org.schabi.newpipe.database.stream.model.StreamEntity
 import org.schabi.newpipe.database.stream.model.StreamEntity.Companion.STREAM_ID
 import org.schabi.newpipe.extractor.stream.StreamType
 import org.schabi.newpipe.extractor.stream.StreamType.AUDIO_LIVE_STREAM
 import org.schabi.newpipe.extractor.stream.StreamType.LIVE_STREAM
+import java.time.OffsetDateTime
 
 @Dao
 abstract class StreamDAO : BasicDAO<StreamEntity> {
@@ -35,10 +35,12 @@ abstract class StreamDAO : BasicDAO<StreamEntity> {
     @Insert(onConflict = OnConflictStrategy.IGNORE)
     internal abstract fun silentInsertAllInternal(streams: List<StreamEntity>): List<Long>
 
-    @Query("""
+    @Query(
+        """
         SELECT uid, stream_type, textual_upload_date, upload_date, is_upload_date_approximation, duration 
         FROM streams WHERE url = :url AND service_id = :serviceId
-        """)
+        """
+    )
     internal abstract fun getMinimalStreamForCompare(serviceId: Int, url: String): StreamCompareFeed?
 
     @Transaction
@@ -79,7 +81,7 @@ abstract class StreamDAO : BasicDAO<StreamEntity> {
 
     private fun compareAndUpdateStream(newerStream: StreamEntity) {
         val existentMinimalStream = getMinimalStreamForCompare(newerStream.serviceId, newerStream.url)
-                ?: throw IllegalStateException("Stream cannot be null just after insertion.")
+            ?: throw IllegalStateException("Stream cannot be null just after insertion.")
         newerStream.uid = existentMinimalStream.uid
 
         val isNewerStreamLive = newerStream.streamType == AUDIO_LIVE_STREAM || newerStream.streamType == LIVE_STREAM
@@ -88,7 +90,7 @@ abstract class StreamDAO : BasicDAO<StreamEntity> {
             // Use the existent upload date if the newer stream does not have a better precision
             // (i.e. is an approximation). This is done to prevent unnecessary changes.
             val hasBetterPrecision =
-                    newerStream.uploadDate != null && newerStream.isUploadDateApproximation != true
+                newerStream.uploadDate != null && newerStream.isUploadDateApproximation != true
             if (existentMinimalStream.uploadDate != null && !hasBetterPrecision) {
                 newerStream.uploadDate = existentMinimalStream.uploadDate
                 newerStream.textualUploadDate = existentMinimalStream.textualUploadDate
@@ -101,7 +103,8 @@ abstract class StreamDAO : BasicDAO<StreamEntity> {
         }
     }
 
-    @Query("""
+    @Query(
+        """
         DELETE FROM streams WHERE
 
         NOT EXISTS (SELECT 1 FROM stream_history sh
@@ -112,7 +115,8 @@ abstract class StreamDAO : BasicDAO<StreamEntity> {
 
         AND NOT EXISTS (SELECT 1 FROM feed f
         WHERE f.stream_id = streams.uid)
-        """)
+        """
+    )
     abstract fun deleteOrphans(): Int
 
     /**
diff --git a/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamStateDAO.java b/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamStateDAO.java
index eb0f77f66..a6b36e3ff 100644
--- a/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamStateDAO.java
+++ b/app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamStateDAO.java
@@ -11,7 +11,7 @@ import org.schabi.newpipe.database.stream.model.StreamStateEntity;
 
 import java.util.List;
 
-import io.reactivex.Flowable;
+import io.reactivex.rxjava3.core.Flowable;
 
 import static org.schabi.newpipe.database.stream.model.StreamStateEntity.JOIN_STREAM_ID;
 import static org.schabi.newpipe.database.stream.model.StreamStateEntity.STREAM_STATE_TABLE;
diff --git a/app/src/main/java/org/schabi/newpipe/database/stream/model/StreamEntity.kt b/app/src/main/java/org/schabi/newpipe/database/stream/model/StreamEntity.kt
index defcb7acf..0f3e18e7b 100644
--- a/app/src/main/java/org/schabi/newpipe/database/stream/model/StreamEntity.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/stream/model/StreamEntity.kt
@@ -5,8 +5,6 @@ import androidx.room.Entity
 import androidx.room.Ignore
 import androidx.room.Index
 import androidx.room.PrimaryKey
-import java.io.Serializable
-import java.time.OffsetDateTime
 import org.schabi.newpipe.database.stream.model.StreamEntity.Companion.STREAM_SERVICE_ID
 import org.schabi.newpipe.database.stream.model.StreamEntity.Companion.STREAM_TABLE
 import org.schabi.newpipe.database.stream.model.StreamEntity.Companion.STREAM_URL
@@ -15,11 +13,14 @@ import org.schabi.newpipe.extractor.stream.StreamInfo
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
 import org.schabi.newpipe.extractor.stream.StreamType
 import org.schabi.newpipe.player.playqueue.PlayQueueItem
+import java.io.Serializable
+import java.time.OffsetDateTime
 
-@Entity(tableName = STREAM_TABLE,
-        indices = [
-            Index(value = [STREAM_SERVICE_ID, STREAM_URL], unique = true)
-        ]
+@Entity(
+    tableName = STREAM_TABLE,
+    indices = [
+        Index(value = [STREAM_SERVICE_ID, STREAM_URL], unique = true)
+    ]
 )
 data class StreamEntity(
     @PrimaryKey(autoGenerate = true)
@@ -61,27 +62,27 @@ data class StreamEntity(
 ) : Serializable {
     @Ignore
     constructor(item: StreamInfoItem) : this(
-            serviceId = item.serviceId, url = item.url, title = item.name,
-            streamType = item.streamType, duration = item.duration, uploader = item.uploaderName,
-            thumbnailUrl = item.thumbnailUrl, viewCount = item.viewCount,
-            textualUploadDate = item.textualUploadDate, uploadDate = item.uploadDate?.offsetDateTime(),
-            isUploadDateApproximation = item.uploadDate?.isApproximation
+        serviceId = item.serviceId, url = item.url, title = item.name,
+        streamType = item.streamType, duration = item.duration, uploader = item.uploaderName,
+        thumbnailUrl = item.thumbnailUrl, viewCount = item.viewCount,
+        textualUploadDate = item.textualUploadDate, uploadDate = item.uploadDate?.offsetDateTime(),
+        isUploadDateApproximation = item.uploadDate?.isApproximation
     )
 
     @Ignore
     constructor(info: StreamInfo) : this(
-            serviceId = info.serviceId, url = info.url, title = info.name,
-            streamType = info.streamType, duration = info.duration, uploader = info.uploaderName,
-            thumbnailUrl = info.thumbnailUrl, viewCount = info.viewCount,
-            textualUploadDate = info.textualUploadDate, uploadDate = info.uploadDate?.offsetDateTime(),
-            isUploadDateApproximation = info.uploadDate?.isApproximation
+        serviceId = info.serviceId, url = info.url, title = info.name,
+        streamType = info.streamType, duration = info.duration, uploader = info.uploaderName,
+        thumbnailUrl = info.thumbnailUrl, viewCount = info.viewCount,
+        textualUploadDate = info.textualUploadDate, uploadDate = info.uploadDate?.offsetDateTime(),
+        isUploadDateApproximation = info.uploadDate?.isApproximation
     )
 
     @Ignore
     constructor(item: PlayQueueItem) : this(
-            serviceId = item.serviceId, url = item.url, title = item.title,
-            streamType = item.streamType, duration = item.duration, uploader = item.uploader,
-            thumbnailUrl = item.thumbnailUrl
+        serviceId = item.serviceId, url = item.url, title = item.title,
+        streamType = item.streamType, duration = item.duration, uploader = item.uploader,
+        thumbnailUrl = item.thumbnailUrl
     )
 
     fun toStreamInfoItem(): StreamInfoItem {
diff --git a/app/src/main/java/org/schabi/newpipe/database/subscription/SubscriptionDAO.kt b/app/src/main/java/org/schabi/newpipe/database/subscription/SubscriptionDAO.kt
index 60dd343b9..9798ec72d 100644
--- a/app/src/main/java/org/schabi/newpipe/database/subscription/SubscriptionDAO.kt
+++ b/app/src/main/java/org/schabi/newpipe/database/subscription/SubscriptionDAO.kt
@@ -5,8 +5,8 @@ import androidx.room.Insert
 import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import androidx.room.Transaction
-import io.reactivex.Flowable
-import io.reactivex.Maybe
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.core.Maybe
 import org.schabi.newpipe.database.BasicDAO
 
 @Dao
@@ -20,16 +20,19 @@ abstract class SubscriptionDAO : BasicDAO<SubscriptionEntity> {
     @Query("SELECT * FROM subscriptions ORDER BY name COLLATE NOCASE ASC")
     abstract override fun getAll(): Flowable<List<SubscriptionEntity>>
 
-    @Query("""
+    @Query(
+        """
         SELECT * FROM subscriptions
 
         WHERE name LIKE '%' || :filter || '%'
 
         ORDER BY name COLLATE NOCASE ASC
-        """)
+        """
+    )
     abstract fun getSubscriptionsFiltered(filter: String): Flowable<List<SubscriptionEntity>>
 
-    @Query("""
+    @Query(
+        """
         SELECT * FROM subscriptions s
 
         LEFT JOIN feed_group_subscription_join fgs
@@ -38,12 +41,14 @@ abstract class SubscriptionDAO : BasicDAO<SubscriptionEntity> {
         WHERE (fgs.subscription_id IS NULL OR fgs.group_id = :currentGroupId)
 
         ORDER BY name COLLATE NOCASE ASC
-        """)
+        """
+    )
     abstract fun getSubscriptionsOnlyUngrouped(
         currentGroupId: Long
     ): Flowable<List<SubscriptionEntity>>
 
-    @Query("""
+    @Query(
+        """
         SELECT * FROM subscriptions s
 
         LEFT JOIN feed_group_subscription_join fgs
@@ -53,7 +58,8 @@ abstract class SubscriptionDAO : BasicDAO<SubscriptionEntity> {
         AND s.name LIKE '%' || :filter || '%'
 
         ORDER BY name COLLATE NOCASE ASC
-        """)
+        """
+    )
     abstract fun getSubscriptionsOnlyUngroupedFiltered(
         currentGroupId: Long,
         filter: String
diff --git a/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java b/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java
index 827da87e1..e80a0ab21 100644
--- a/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java
+++ b/app/src/main/java/org/schabi/newpipe/download/DownloadDialog.java
@@ -10,7 +10,6 @@ import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.IBinder;
-import androidx.preference.PreferenceManager;
 import android.util.Log;
 import android.util.SparseArray;
 import android.view.LayoutInflater;
@@ -34,6 +33,7 @@ import androidx.appcompat.view.menu.ActionMenuItemView;
 import androidx.appcompat.widget.Toolbar;
 import androidx.documentfile.provider.DocumentFile;
 import androidx.fragment.app.DialogFragment;
+import androidx.preference.PreferenceManager;
 
 import com.nononsenseapps.filepicker.Utils;
 
@@ -70,7 +70,7 @@ import java.util.Locale;
 
 import icepick.Icepick;
 import icepick.State;
-import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
 import us.shandian.giga.get.MissionRecoveryInfo;
 import us.shandian.giga.io.StoredDirectoryHelper;
 import us.shandian.giga.io.StoredFileHelper;
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/BaseStateFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/BaseStateFragment.java
index a9007052f..0d25765a4 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/BaseStateFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/BaseStateFragment.java
@@ -13,7 +13,7 @@ import android.widget.Toast;
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
 
-import com.jakewharton.rxbinding2.view.RxView;
+import com.jakewharton.rxbinding4.view.RxView;
 
 import org.schabi.newpipe.BaseFragment;
 import org.schabi.newpipe.MainActivity;
@@ -34,8 +34,8 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import icepick.State;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 import static org.schabi.newpipe.util.AnimationUtils.animateView;
 
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java
index e7c98fe8b..427cff06e 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java
@@ -15,9 +15,6 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
-import android.view.ViewTreeObserver;
-import androidx.core.text.HtmlCompat;
-import androidx.preference.PreferenceManager;
 import android.provider.Settings;
 import android.text.TextUtils;
 import android.text.util.Linkify;
@@ -27,6 +24,7 @@ import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.ViewTreeObserver;
 import android.view.WindowManager;
 import android.view.animation.DecelerateInterpolator;
 import android.widget.FrameLayout;
@@ -45,7 +43,9 @@ import androidx.appcompat.content.res.AppCompatResources;
 import androidx.appcompat.widget.Toolbar;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.core.content.ContextCompat;
+import androidx.core.text.HtmlCompat;
 import androidx.fragment.app.Fragment;
+import androidx.preference.PreferenceManager;
 import androidx.viewpager.widget.ViewPager;
 
 import com.google.android.exoplayer2.ExoPlaybackException;
@@ -116,11 +116,11 @@ import java.util.concurrent.TimeUnit;
 import icepick.State;
 import io.noties.markwon.Markwon;
 import io.noties.markwon.linkify.LinkifyPlugin;
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.COMMENTS;
 import static org.schabi.newpipe.extractor.stream.StreamExtractor.NO_AGE_LIMIT;
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/BaseListInfoFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/BaseListInfoFragment.java
index 43fc74922..006072e93 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/BaseListInfoFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/BaseListInfoFragment.java
@@ -16,10 +16,10 @@ import org.schabi.newpipe.views.NewPipeRecyclerView;
 import java.util.Queue;
 
 import icepick.State;
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public abstract class BaseListInfoFragment<I extends ListInfo>
         extends BaseListFragment<I, ListExtractor.InfoItemsPage> {
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelFragment.java
index 6ec818909..0342bb99c 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelFragment.java
@@ -24,7 +24,7 @@ import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.content.ContextCompat;
 
-import com.jakewharton.rxbinding2.view.RxView;
+import com.jakewharton.rxbinding4.view.RxView;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.database.subscription.SubscriptionEntity;
@@ -53,15 +53,15 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
 
-import io.reactivex.Observable;
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.functions.Action;
-import io.reactivex.functions.Consumer;
-import io.reactivex.functions.Function;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Observable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.functions.Action;
+import io.reactivex.rxjava3.functions.Consumer;
+import io.reactivex.rxjava3.functions.Function;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 import static org.schabi.newpipe.util.AnimationUtils.animateBackgroundColor;
 import static org.schabi.newpipe.util.AnimationUtils.animateTextColor;
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentsFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentsFragment.java
index cb9f83895..68b0d823a 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentsFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/comments/CommentsFragment.java
@@ -20,8 +20,8 @@ import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.util.AnimationUtils;
 import org.schabi.newpipe.util.ExtractorHelper;
 
-import io.reactivex.Single;
-import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
 
 public class CommentsFragment extends BaseListInfoFragment<CommentsInfo> {
     private final CompositeDisposable disposables = new CompositeDisposable();
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/kiosk/KioskFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/kiosk/KioskFragment.java
index 68097e21e..8770e6936 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/kiosk/KioskFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/kiosk/KioskFragment.java
@@ -26,7 +26,7 @@ import org.schabi.newpipe.util.KioskTranslator;
 import org.schabi.newpipe.util.Localization;
 
 import icepick.State;
-import io.reactivex.Single;
+import io.reactivex.rxjava3.core.Single;
 
 import static org.schabi.newpipe.util.AnimationUtils.animateView;
 
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java
index 71b51f9a1..d1a964fb2 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java
@@ -51,12 +51,11 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import io.reactivex.Flowable;
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.disposables.Disposables;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 import static org.schabi.newpipe.util.AnimationUtils.animateView;
 
@@ -460,7 +459,7 @@ public class PlaylistFragment extends BaseListInfoFragment<PlaylistInfo> {
                     .doFinally(() -> playlistEntity = null)
                     .subscribe(ignored -> { /* Do nothing */ }, this::onError);
         } else {
-            action = Disposables.empty();
+            action = Disposable.empty();
         }
 
         disposables.add(action);
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java
index 66e16ff3c..02dbf176b 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/search/SearchFragment.java
@@ -68,13 +68,13 @@ import java.util.Queue;
 import java.util.concurrent.TimeUnit;
 
 import icepick.State;
-import io.reactivex.Flowable;
-import io.reactivex.Observable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
-import io.reactivex.subjects.PublishSubject;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Observable;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
+import io.reactivex.rxjava3.subjects.PublishSubject;
 
 import static androidx.recyclerview.widget.ItemTouchHelper.Callback.makeMovementFlags;
 import static java.util.Arrays.asList;
@@ -709,7 +709,7 @@ public class SearchFragment extends BaseListFragment<SearchInfo, ListExtractor.I
 
         final Observable<String> observable = suggestionPublisher
                 .debounce(SUGGESTIONS_DEBOUNCE, TimeUnit.MILLISECONDS)
-                .startWith(searchString != null
+                .startWithItem(searchString != null
                         ? searchString
                         : "")
                 .filter(ss -> isSuggestionsEnabled);
diff --git a/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java b/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java
index 90cb60d33..907615b45 100644
--- a/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/fragments/list/videos/RelatedVideosFragment.java
@@ -3,7 +3,6 @@ package org.schabi.newpipe.fragments.list.videos;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Bundle;
-import androidx.preference.PreferenceManager;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
@@ -13,6 +12,7 @@ import android.widget.Switch;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.preference.PreferenceManager;
 
 import org.schabi.newpipe.R;
 import org.schabi.newpipe.extractor.ListExtractor;
@@ -25,8 +25,8 @@ import org.schabi.newpipe.util.RelatedStreamInfo;
 
 import java.io.Serializable;
 
-import io.reactivex.Single;
-import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
 
 public class RelatedVideosFragment extends BaseListInfoFragment<RelatedStreamInfo>
         implements SharedPreferences.OnSharedPreferenceChangeListener {
diff --git a/app/src/main/java/org/schabi/newpipe/local/bookmark/BookmarkFragment.java b/app/src/main/java/org/schabi/newpipe/local/bookmark/BookmarkFragment.java
index d7555a79d..d5241ae02 100644
--- a/app/src/main/java/org/schabi/newpipe/local/bookmark/BookmarkFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/local/bookmark/BookmarkFragment.java
@@ -33,11 +33,11 @@ import org.schabi.newpipe.util.OnClickGesture;
 import java.util.List;
 
 import icepick.State;
-import io.reactivex.Flowable;
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 public final class BookmarkFragment extends BaseLocalListFragment<List<PlaylistLocalItem>, Void> {
     @State
diff --git a/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java b/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java
index 4a09da77f..93e1141c7 100644
--- a/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java
+++ b/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistAppendDialog.java
@@ -28,9 +28,9 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 public final class PlaylistAppendDialog extends PlaylistDialog {
     private static final String TAG = PlaylistAppendDialog.class.getCanonicalName();
@@ -98,7 +98,7 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
         super.onViewCreated(view, savedInstanceState);
 
         final LocalPlaylistManager playlistManager =
-                new LocalPlaylistManager(NewPipeDatabase.getInstance(getContext()));
+                new LocalPlaylistManager(NewPipeDatabase.getInstance(requireContext()));
 
         playlistAdapter = new LocalItemListAdapter(getActivity());
         playlistAdapter.setSelectedListener(new OnClickGesture<LocalItem>() {
@@ -113,7 +113,7 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
         });
 
         playlistRecyclerView = view.findViewById(R.id.playlist_list);
-        playlistRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
+        playlistRecyclerView.setLayoutManager(new LinearLayoutManager(requireContext()));
         playlistRecyclerView.setAdapter(playlistAdapter);
 
         final View newPlaylistButton = view.findViewById(R.id.newPlaylist);
@@ -146,12 +146,12 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
     //////////////////////////////////////////////////////////////////////////*/
 
     public void openCreatePlaylistDialog() {
-        if (getStreams() == null || getFragmentManager() == null) {
+        if (getStreams() == null || !isAdded()) {
             return;
         }
 
-        PlaylistCreationDialog.newInstance(getStreams()).show(getFragmentManager(), TAG);
-        getDialog().dismiss();
+        PlaylistCreationDialog.newInstance(getStreams()).show(getParentFragmentManager(), TAG);
+        requireDialog().dismiss();
     }
 
     private void onPlaylistsReceived(@NonNull final List<PlaylistMetadataEntry> playlists) {
@@ -183,6 +183,6 @@ public final class PlaylistAppendDialog extends PlaylistDialog {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(ignored -> successToast.show()));
 
-        getDialog().dismiss();
+        requireDialog().dismiss();
     }
 }
diff --git a/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistCreationDialog.java b/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistCreationDialog.java
index 55782b452..4d19f0dd9 100644
--- a/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistCreationDialog.java
+++ b/app/src/main/java/org/schabi/newpipe/local/dialog/PlaylistCreationDialog.java
@@ -17,7 +17,7 @@ import org.schabi.newpipe.local.playlist.LocalPlaylistManager;
 
 import java.util.List;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
 
 public final class PlaylistCreationDialog extends PlaylistDialog {
     public static PlaylistCreationDialog newInstance(final List<StreamEntity> streams) {
diff --git a/app/src/main/java/org/schabi/newpipe/local/feed/FeedDatabaseManager.kt b/app/src/main/java/org/schabi/newpipe/local/feed/FeedDatabaseManager.kt
index 8bd8c1986..9a4832c81 100644
--- a/app/src/main/java/org/schabi/newpipe/local/feed/FeedDatabaseManager.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/feed/FeedDatabaseManager.kt
@@ -2,14 +2,11 @@ package org.schabi.newpipe.local.feed
 
 import android.content.Context
 import android.util.Log
-import io.reactivex.Completable
-import io.reactivex.Flowable
-import io.reactivex.Maybe
-import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.schedulers.Schedulers
-import java.time.LocalDate
-import java.time.OffsetDateTime
-import java.time.ZoneOffset
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.core.Completable
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.core.Maybe
+import io.reactivex.rxjava3.schedulers.Schedulers
 import org.schabi.newpipe.MainActivity.DEBUG
 import org.schabi.newpipe.NewPipeDatabase
 import org.schabi.newpipe.database.feed.model.FeedEntity
@@ -19,6 +16,9 @@ import org.schabi.newpipe.database.stream.model.StreamEntity
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
 import org.schabi.newpipe.extractor.stream.StreamType
 import org.schabi.newpipe.local.subscription.FeedGroupIcon
+import java.time.LocalDate
+import java.time.OffsetDateTime
+import java.time.ZoneOffset
 
 class FeedDatabaseManager(context: Context) {
     private val database = NewPipeDatabase.getInstance(context)
@@ -31,7 +31,7 @@ class FeedDatabaseManager(context: Context) {
          * Only items that are newer than this will be saved.
          */
         val FEED_OLDEST_ALLOWED_DATE: OffsetDateTime = LocalDate.now().minusWeeks(13)
-                .atStartOfDay().atOffset(ZoneOffset.UTC)
+            .atStartOfDay().atOffset(ZoneOffset.UTC)
     }
 
     fun groups() = feedGroupTable.getAll()
@@ -44,9 +44,9 @@ class FeedDatabaseManager(context: Context) {
             else -> feedTable.getAllStreamsFromGroup(groupId)
         }
 
-        return streams.map<List<StreamInfoItem>> {
+        return streams.map {
             val items = ArrayList<StreamInfoItem>(it.size)
-            it.mapTo(items) { it.toStreamInfoItem() }
+            it.mapTo(items) { stream -> stream.toStreamInfoItem() }
             return@map items
         }
     }
@@ -61,10 +61,10 @@ class FeedDatabaseManager(context: Context) {
     }
 
     fun outdatedSubscriptionsForGroup(groupId: Long = FeedGroupEntity.GROUP_ALL_ID, outdatedThreshold: OffsetDateTime) =
-            feedTable.getAllOutdatedForGroup(groupId, outdatedThreshold)
+        feedTable.getAllOutdatedForGroup(groupId, outdatedThreshold)
 
     fun markAsOutdated(subscriptionId: Long) = feedTable
-            .setLastUpdatedForSubscription(FeedLastUpdatedEntity(subscriptionId, null))
+        .setLastUpdatedForSubscription(FeedLastUpdatedEntity(subscriptionId, null))
 
     fun upsertAll(
         subscriptionId: Long,
@@ -92,8 +92,12 @@ class FeedDatabaseManager(context: Context) {
             feedTable.insertAll(feedEntities)
         }
 
-        feedTable.setLastUpdatedForSubscription(FeedLastUpdatedEntity(subscriptionId,
-                OffsetDateTime.now(ZoneOffset.UTC)))
+        feedTable.setLastUpdatedForSubscription(
+            FeedLastUpdatedEntity(
+                subscriptionId,
+                OffsetDateTime.now(ZoneOffset.UTC)
+            )
+        )
     }
 
     fun removeOrphansOrOlderStreams(oldestAllowedDate: OffsetDateTime = FEED_OLDEST_ALLOWED_DATE) {
@@ -113,38 +117,38 @@ class FeedDatabaseManager(context: Context) {
 
     fun subscriptionIdsForGroup(groupId: Long): Flowable<List<Long>> {
         return feedGroupTable.getSubscriptionIdsFor(groupId)
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
     }
 
     fun updateSubscriptionsForGroup(groupId: Long, subscriptionIds: List<Long>): Completable {
         return Completable.fromCallable { feedGroupTable.updateSubscriptionsForGroup(groupId, subscriptionIds) }
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
     }
 
     fun createGroup(name: String, icon: FeedGroupIcon): Maybe<Long> {
         return Maybe.fromCallable { feedGroupTable.insert(FeedGroupEntity(0, name, icon)) }
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
     }
 
     fun getGroup(groupId: Long): Maybe<FeedGroupEntity> {
         return feedGroupTable.getGroup(groupId)
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
     }
 
     fun updateGroup(feedGroupEntity: FeedGroupEntity): Completable {
         return Completable.fromCallable { feedGroupTable.update(feedGroupEntity) }
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
     }
 
     fun deleteGroup(groupId: Long): Completable {
         return Completable.fromCallable { feedGroupTable.delete(groupId) }
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
     }
 
     fun updateGroupsOrder(groupIdList: List<Long>): Completable {
@@ -152,8 +156,8 @@ class FeedDatabaseManager(context: Context) {
         val orderMap = groupIdList.associateBy({ it }, { index++ })
 
         return Completable.fromCallable { feedGroupTable.updateOrder(orderMap) }
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
     }
 
     fun oldestSubscriptionUpdate(groupId: Long): Flowable<List<OffsetDateTime>> {
diff --git a/app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt b/app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt
index b6b198b58..dbe91ec55 100644
--- a/app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt
@@ -37,7 +37,6 @@ import androidx.lifecycle.ViewModelProvider
 import androidx.preference.PreferenceManager
 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout
 import icepick.State
-import java.util.Calendar
 import kotlinx.android.synthetic.main.error_retry.error_button_retry
 import kotlinx.android.synthetic.main.error_retry.error_message_view
 import kotlinx.android.synthetic.main.fragment_feed.empty_state_view
@@ -55,6 +54,7 @@ import org.schabi.newpipe.local.feed.service.FeedLoadService
 import org.schabi.newpipe.report.UserAction
 import org.schabi.newpipe.util.AnimationUtils.animateView
 import org.schabi.newpipe.util.Localization
+import java.util.Calendar
 
 class FeedFragment : BaseListFragment<FeedState, Unit>() {
     private lateinit var viewModel: FeedViewModel
@@ -76,7 +76,7 @@ class FeedFragment : BaseListFragment<FeedState, Unit>() {
         super.onCreate(savedInstanceState)
 
         groupId = arguments?.getLong(KEY_GROUP_ID, FeedGroupEntity.GROUP_ALL_ID)
-                ?: FeedGroupEntity.GROUP_ALL_ID
+            ?: FeedGroupEntity.GROUP_ALL_ID
         groupName = arguments?.getString(KEY_GROUP_NAME) ?: ""
     }
 
@@ -144,15 +144,15 @@ class FeedFragment : BaseListFragment<FeedState, Unit>() {
             }
 
             AlertDialog.Builder(requireContext())
-                    .setMessage(R.string.feed_use_dedicated_fetch_method_help_text)
-                    .setNeutralButton(enableDisableButtonText) { _, _ ->
-                        sharedPreferences.edit {
-                            putBoolean(getString(R.string.feed_use_dedicated_fetch_method_key), !usingDedicatedMethod)
-                        }
+                .setMessage(R.string.feed_use_dedicated_fetch_method_help_text)
+                .setNeutralButton(enableDisableButtonText) { _, _ ->
+                    sharedPreferences.edit {
+                        putBoolean(getString(R.string.feed_use_dedicated_fetch_method_key), !usingDedicatedMethod)
                     }
-                    .setPositiveButton(resources.getString(R.string.finish), null)
-                    .create()
-                    .show()
+                }
+                .setPositiveButton(resources.getString(R.string.finish), null)
+                .create()
+                .show()
             return true
         }
 
@@ -234,7 +234,7 @@ class FeedFragment : BaseListFragment<FeedState, Unit>() {
         showLoading()
 
         val isIndeterminate = progressState.currentProgress == -1 &&
-                progressState.maxProgress == -1
+            progressState.maxProgress == -1
 
         if (!isIndeterminate) {
             loading_progress_text.text = "${progressState.currentProgress}/${progressState.maxProgress}"
@@ -245,7 +245,7 @@ class FeedFragment : BaseListFragment<FeedState, Unit>() {
         }
 
         loading_progress_bar.isIndeterminate = isIndeterminate ||
-                (progressState.maxProgress > 0 && progressState.currentProgress == 0)
+            (progressState.maxProgress > 0 && progressState.currentProgress == 0)
         loading_progress_bar.progress = progressState.currentProgress
 
         loading_progress_bar.max = progressState.maxProgress
@@ -267,8 +267,10 @@ class FeedFragment : BaseListFragment<FeedState, Unit>() {
         }
 
         if (loadedState.itemsErrors.isNotEmpty()) {
-            showSnackBarError(loadedState.itemsErrors, UserAction.REQUESTED_FEED,
-                    "none", "Loading feed", R.string.general_error)
+            showSnackBarError(
+                loadedState.itemsErrors, UserAction.REQUESTED_FEED,
+                "none", "Loading feed", R.string.general_error
+            )
         }
 
         if (loadedState.items.isEmpty()) {
@@ -311,9 +313,11 @@ class FeedFragment : BaseListFragment<FeedState, Unit>() {
     override fun hasMoreItems() = false
 
     private fun triggerUpdate() {
-        getActivity()?.startService(Intent(requireContext(), FeedLoadService::class.java).apply {
-            putExtra(FeedLoadService.EXTRA_GROUP_ID, groupId)
-        })
+        getActivity()?.startService(
+            Intent(requireContext(), FeedLoadService::class.java).apply {
+                putExtra(FeedLoadService.EXTRA_GROUP_ID, groupId)
+            }
+        )
         listState = null
     }
 
diff --git a/app/src/main/java/org/schabi/newpipe/local/feed/FeedState.kt b/app/src/main/java/org/schabi/newpipe/local/feed/FeedState.kt
index de3dd3113..00ca76b8e 100644
--- a/app/src/main/java/org/schabi/newpipe/local/feed/FeedState.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/feed/FeedState.kt
@@ -1,8 +1,8 @@
 package org.schabi.newpipe.local.feed
 
 import androidx.annotation.StringRes
-import java.util.Calendar
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
+import java.util.Calendar
 
 sealed class FeedState {
     data class ProgressState(
diff --git a/app/src/main/java/org/schabi/newpipe/local/feed/FeedViewModel.kt b/app/src/main/java/org/schabi/newpipe/local/feed/FeedViewModel.kt
index 0976de248..84f913409 100644
--- a/app/src/main/java/org/schabi/newpipe/local/feed/FeedViewModel.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/feed/FeedViewModel.kt
@@ -5,12 +5,10 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
-import io.reactivex.Flowable
-import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.functions.Function4
-import io.reactivex.schedulers.Schedulers
-import java.time.OffsetDateTime
-import java.util.concurrent.TimeUnit
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.functions.Function4
+import io.reactivex.rxjava3.schedulers.Schedulers
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
 import org.schabi.newpipe.ktx.toCalendar
@@ -20,6 +18,8 @@ import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.IdleEvent
 import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.ProgressEvent
 import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.SuccessResultEvent
 import org.schabi.newpipe.util.DEFAULT_THROTTLE_TIMEOUT
+import java.time.OffsetDateTime
+import java.util.concurrent.TimeUnit
 
 class FeedViewModel(applicationContext: Context, val groupId: Long = FeedGroupEntity.GROUP_ALL_ID) : ViewModel() {
     class Factory(val context: Context, val groupId: Long = FeedGroupEntity.GROUP_ALL_ID) : ViewModelProvider.Factory {
@@ -35,34 +35,34 @@ class FeedViewModel(applicationContext: Context, val groupId: Long = FeedGroupEn
     val stateLiveData: LiveData<FeedState> = mutableStateLiveData
 
     private var combineDisposable = Flowable
-            .combineLatest(
-                    FeedEventManager.events(),
-                    feedDatabaseManager.asStreamItems(groupId),
-                    feedDatabaseManager.notLoadedCount(groupId),
-                    feedDatabaseManager.oldestSubscriptionUpdate(groupId),
+        .combineLatest(
+            FeedEventManager.events(),
+            feedDatabaseManager.asStreamItems(groupId),
+            feedDatabaseManager.notLoadedCount(groupId),
+            feedDatabaseManager.oldestSubscriptionUpdate(groupId),
+            Function4 { t1: FeedEventManager.Event, t2: List<StreamInfoItem>, t3: Long, t4: List<OffsetDateTime> ->
+                return@Function4 CombineResultHolder(t1, t2, t3, t4.firstOrNull())
+            }
+        )
+        .throttleLatest(DEFAULT_THROTTLE_TIMEOUT, TimeUnit.MILLISECONDS)
+        .subscribeOn(Schedulers.io())
+        .observeOn(AndroidSchedulers.mainThread())
+        .subscribe { (event, listFromDB, notLoadedCount, oldestUpdate) ->
+            val oldestUpdateCalendar = oldestUpdate?.toCalendar()
 
-                    Function4 { t1: FeedEventManager.Event, t2: List<StreamInfoItem>, t3: Long, t4: List<OffsetDateTime> ->
-                        return@Function4 CombineResultHolder(t1, t2, t3, t4.firstOrNull())
-                    }
-            )
-            .throttleLatest(DEFAULT_THROTTLE_TIMEOUT, TimeUnit.MILLISECONDS)
-            .subscribeOn(Schedulers.io())
-            .observeOn(AndroidSchedulers.mainThread())
-            .subscribe { (event, listFromDB, notLoadedCount, oldestUpdate) ->
-
-                val oldestUpdateCalendar = oldestUpdate?.toCalendar()
-
-                mutableStateLiveData.postValue(when (event) {
+            mutableStateLiveData.postValue(
+                when (event) {
                     is IdleEvent -> FeedState.LoadedState(listFromDB, oldestUpdateCalendar, notLoadedCount)
                     is ProgressEvent -> FeedState.ProgressState(event.currentProgress, event.maxProgress, event.progressMessage)
                     is SuccessResultEvent -> FeedState.LoadedState(listFromDB, oldestUpdateCalendar, notLoadedCount, event.itemsErrors)
                     is ErrorResultEvent -> FeedState.ErrorState(event.error)
-                })
-
-                if (event is ErrorResultEvent || event is SuccessResultEvent) {
-                    FeedEventManager.reset()
                 }
+            )
+
+            if (event is ErrorResultEvent || event is SuccessResultEvent) {
+                FeedEventManager.reset()
             }
+        }
 
     override fun onCleared() {
         super.onCleared()
diff --git a/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt b/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt
index b72098345..3d19de9c6 100644
--- a/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedEventManager.kt
@@ -1,15 +1,15 @@
 package org.schabi.newpipe.local.feed.service
 
 import androidx.annotation.StringRes
-import io.reactivex.Flowable
-import io.reactivex.processors.BehaviorProcessor
-import java.util.concurrent.atomic.AtomicBoolean
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.processors.BehaviorProcessor
 import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.IdleEvent
+import java.util.concurrent.atomic.AtomicBoolean
 
 object FeedEventManager {
     private var processor: BehaviorProcessor<Event> = BehaviorProcessor.create()
     private var ignoreUpstream = AtomicBoolean()
-    private var eventsFlowable = processor.startWith(IdleEvent)
+    private var eventsFlowable = processor.startWithItem(IdleEvent)
 
     fun postEvent(event: Event) {
         processor.onNext(event)
diff --git a/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadService.kt b/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadService.kt
index 8d3afbc7e..ddbbea23d 100644
--- a/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadService.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadService.kt
@@ -31,21 +31,15 @@ import android.util.Log
 import androidx.core.app.NotificationCompat
 import androidx.core.app.NotificationManagerCompat
 import androidx.preference.PreferenceManager
-import io.reactivex.Flowable
-import io.reactivex.Notification
-import io.reactivex.Single
-import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.disposables.CompositeDisposable
-import io.reactivex.functions.Consumer
-import io.reactivex.functions.Function
-import io.reactivex.processors.PublishProcessor
-import io.reactivex.schedulers.Schedulers
-import java.io.IOException
-import java.time.OffsetDateTime
-import java.time.ZoneOffset
-import java.util.concurrent.TimeUnit
-import java.util.concurrent.atomic.AtomicBoolean
-import java.util.concurrent.atomic.AtomicInteger
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.core.Notification
+import io.reactivex.rxjava3.core.Single
+import io.reactivex.rxjava3.disposables.CompositeDisposable
+import io.reactivex.rxjava3.functions.Consumer
+import io.reactivex.rxjava3.functions.Function
+import io.reactivex.rxjava3.processors.PublishProcessor
+import io.reactivex.rxjava3.schedulers.Schedulers
 import org.reactivestreams.Subscriber
 import org.reactivestreams.Subscription
 import org.schabi.newpipe.MainActivity.DEBUG
@@ -56,13 +50,18 @@ import org.schabi.newpipe.extractor.exceptions.ReCaptchaException
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
 import org.schabi.newpipe.local.feed.FeedDatabaseManager
 import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.ErrorResultEvent
-import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.IdleEvent
 import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.ProgressEvent
 import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.SuccessResultEvent
 import org.schabi.newpipe.local.feed.service.FeedEventManager.postEvent
 import org.schabi.newpipe.local.subscription.SubscriptionManager
 import org.schabi.newpipe.util.ExceptionUtils
 import org.schabi.newpipe.util.ExtractorHelper
+import java.io.IOException
+import java.time.OffsetDateTime
+import java.time.ZoneOffset
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicBoolean
+import java.util.concurrent.atomic.AtomicInteger
 
 class FeedLoadService : Service() {
     companion object {
@@ -109,8 +108,11 @@ class FeedLoadService : Service() {
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
         if (DEBUG) {
-            Log.d(TAG, "onStartCommand() called with: intent = [" + intent + "]," +
-                    " flags = [" + flags + "], startId = [" + startId + "]")
+            Log.d(
+                TAG,
+                "onStartCommand() called with: intent = [" + intent + "]," +
+                    " flags = [" + flags + "], startId = [" + startId + "]"
+            )
         }
 
         if (intent == null || loadingSubscription != null) {
@@ -123,10 +125,10 @@ class FeedLoadService : Service() {
 
         val groupId = intent.getLongExtra(EXTRA_GROUP_ID, FeedGroupEntity.GROUP_ALL_ID)
         val useFeedExtractor = defaultSharedPreferences
-                .getBoolean(getString(R.string.feed_use_dedicated_fetch_method_key), false)
+            .getBoolean(getString(R.string.feed_use_dedicated_fetch_method_key), false)
 
         val thresholdOutdatedSecondsString = defaultSharedPreferences
-                .getString(getString(R.string.feed_update_threshold_key), getString(R.string.feed_update_threshold_default_value))
+            .getString(getString(R.string.feed_update_threshold_key), getString(R.string.feed_update_threshold_default_value))
         val thresholdOutdatedSeconds = thresholdOutdatedSecondsString!!.toInt()
 
         startLoading(groupId, useFeedExtractor, thresholdOutdatedSeconds)
@@ -181,63 +183,63 @@ class FeedLoadService : Service() {
         }
 
         subscriptions
-                .limit(1)
+            .take(1)
 
-                .doOnNext {
-                    currentProgress.set(0)
-                    maxProgress.set(it.size)
+            .doOnNext {
+                currentProgress.set(0)
+                maxProgress.set(it.size)
+            }
+            .filter { it.isNotEmpty() }
+
+            .observeOn(AndroidSchedulers.mainThread())
+            .doOnNext {
+                startForeground(NOTIFICATION_ID, notificationBuilder.build())
+                updateNotificationProgress(null)
+                broadcastProgress()
+            }
+
+            .observeOn(Schedulers.io())
+            .flatMap { Flowable.fromIterable(it) }
+            .takeWhile { !cancelSignal.get() }
+
+            .parallel(PARALLEL_EXTRACTIONS, PARALLEL_EXTRACTIONS * 2)
+            .runOn(Schedulers.io(), PARALLEL_EXTRACTIONS * 2)
+            .filter { !cancelSignal.get() }
+
+            .map { subscriptionEntity ->
+                try {
+                    val listInfo = if (useFeedExtractor) {
+                        ExtractorHelper
+                            .getFeedInfoFallbackToChannelInfo(subscriptionEntity.serviceId, subscriptionEntity.url)
+                            .blockingGet()
+                    } else {
+                        ExtractorHelper
+                            .getChannelInfo(subscriptionEntity.serviceId, subscriptionEntity.url, true)
+                            .blockingGet()
+                    } as ListInfo<StreamInfoItem>
+
+                    return@map Notification.createOnNext(Pair(subscriptionEntity.uid, listInfo))
+                } catch (e: Throwable) {
+                    val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
+                    val wrapper = RequestException(subscriptionEntity.uid, request, e)
+                    return@map Notification.createOnError<Pair<Long, ListInfo<StreamInfoItem>>>(wrapper)
                 }
-                .filter { it.isNotEmpty() }
+            }
+            .sequential()
 
-                .observeOn(AndroidSchedulers.mainThread())
-                .doOnNext {
-                    startForeground(NOTIFICATION_ID, notificationBuilder.build())
-                    updateNotificationProgress(null)
-                    broadcastProgress()
-                }
+            .observeOn(AndroidSchedulers.mainThread())
+            .doOnNext(errorHandlingConsumer)
 
-                .observeOn(Schedulers.io())
-                .flatMap { Flowable.fromIterable(it) }
-                .takeWhile { !cancelSignal.get() }
+            .observeOn(AndroidSchedulers.mainThread())
+            .doOnNext(notificationsConsumer)
 
-                .parallel(PARALLEL_EXTRACTIONS, PARALLEL_EXTRACTIONS * 2)
-                .runOn(Schedulers.io(), PARALLEL_EXTRACTIONS * 2)
-                .filter { !cancelSignal.get() }
+            .observeOn(Schedulers.io())
+            .buffer(BUFFER_COUNT_BEFORE_INSERT)
+            .doOnNext(databaseConsumer)
 
-                .map { subscriptionEntity ->
-                    try {
-                        val listInfo = if (useFeedExtractor) {
-                            ExtractorHelper
-                                    .getFeedInfoFallbackToChannelInfo(subscriptionEntity.serviceId, subscriptionEntity.url)
-                                    .blockingGet()
-                        } else {
-                            ExtractorHelper
-                                    .getChannelInfo(subscriptionEntity.serviceId, subscriptionEntity.url, true)
-                                    .blockingGet()
-                        } as ListInfo<StreamInfoItem>
-
-                        return@map Notification.createOnNext(Pair(subscriptionEntity.uid, listInfo))
-                    } catch (e: Throwable) {
-                        val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
-                        val wrapper = RequestException(subscriptionEntity.uid, request, e)
-                        return@map Notification.createOnError<Pair<Long, ListInfo<StreamInfoItem>>>(wrapper)
-                    }
-                }
-                .sequential()
-
-                .observeOn(AndroidSchedulers.mainThread())
-                .doOnNext(errorHandlingConsumer)
-
-                .observeOn(AndroidSchedulers.mainThread())
-                .doOnNext(notificationsConsumer)
-
-                .observeOn(Schedulers.io())
-                .buffer(BUFFER_COUNT_BEFORE_INSERT)
-                .doOnNext(databaseConsumer)
-
-                .subscribeOn(Schedulers.io())
-                .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(resultSubscriber)
+            .subscribeOn(Schedulers.io())
+            .observeOn(AndroidSchedulers.mainThread())
+            .subscribe(resultSubscriber)
     }
 
     private fun broadcastProgress() {
@@ -262,7 +264,7 @@ class FeedLoadService : Service() {
 
             override fun onComplete() {
                 if (maxProgress.get() == 0) {
-                    postEvent(IdleEvent)
+                    postEvent(FeedEventManager.Event.IdleEvent)
                     stopService()
 
                     return
@@ -274,7 +276,8 @@ class FeedLoadService : Service() {
                 notificationUpdater.onNext(getString(R.string.feed_processing_message))
                 postEvent(ProgressEvent(R.string.feed_processing_message))
 
-                disposables.add(Single
+                disposables.add(
+                    Single
                         .fromCallable {
                             feedResultsHolder.ready()
 
@@ -293,7 +296,8 @@ class FeedLoadService : Service() {
                                 return@subscribe
                             }
                             stopService()
-                        })
+                        }
+                )
             }
         }
 
@@ -364,16 +368,18 @@ class FeedLoadService : Service() {
     private var maxProgress = AtomicInteger(-1)
 
     private fun createNotification(): NotificationCompat.Builder {
-        val cancelActionIntent = PendingIntent.getBroadcast(this,
-                NOTIFICATION_ID, Intent(ACTION_CANCEL), 0)
+        val cancelActionIntent = PendingIntent.getBroadcast(
+            this,
+            NOTIFICATION_ID, Intent(ACTION_CANCEL), 0
+        )
 
         return NotificationCompat.Builder(this, getString(R.string.notification_channel_id))
-                .setOngoing(true)
-                .setProgress(-1, -1, true)
-                .setSmallIcon(R.drawable.ic_newpipe_triangle_white)
-                .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
-                .addAction(0, getString(R.string.cancel), cancelActionIntent)
-                .setContentTitle(getString(R.string.feed_notification_loading))
+            .setOngoing(true)
+            .setProgress(-1, -1, true)
+            .setSmallIcon(R.drawable.ic_newpipe_triangle_white)
+            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
+            .addAction(0, getString(R.string.cancel), cancelActionIntent)
+            .setContentTitle(getString(R.string.feed_notification_loading))
     }
 
     private fun setupNotification() {
@@ -381,13 +387,15 @@ class FeedLoadService : Service() {
         notificationBuilder = createNotification()
 
         val throttleAfterFirstEmission = Function { flow: Flowable<String> ->
-            flow.limit(1).concatWith(flow.skip(1).throttleLatest(NOTIFICATION_SAMPLING_PERIOD.toLong(), TimeUnit.MILLISECONDS))
+            flow.take(1).concatWith(flow.skip(1).throttleLatest(NOTIFICATION_SAMPLING_PERIOD.toLong(), TimeUnit.MILLISECONDS))
         }
 
-        disposables.add(notificationUpdater
+        disposables.add(
+            notificationUpdater
                 .publish(throttleAfterFirstEmission)
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribe(this::updateNotificationProgress))
+                .subscribe(this::updateNotificationProgress)
+        )
     }
 
     private fun updateNotificationProgress(updateDescription: String?) {
diff --git a/app/src/main/java/org/schabi/newpipe/local/history/HistoryRecordManager.java b/app/src/main/java/org/schabi/newpipe/local/history/HistoryRecordManager.java
index 7f5c4f7a7..66f1bda0e 100644
--- a/app/src/main/java/org/schabi/newpipe/local/history/HistoryRecordManager.java
+++ b/app/src/main/java/org/schabi/newpipe/local/history/HistoryRecordManager.java
@@ -50,11 +50,11 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
 
-import io.reactivex.Completable;
-import io.reactivex.Flowable;
-import io.reactivex.Maybe;
-import io.reactivex.Single;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.core.Completable;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Maybe;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class HistoryRecordManager {
     private final AppDatabase database;
diff --git a/app/src/main/java/org/schabi/newpipe/local/history/StatisticsPlaylistFragment.java b/app/src/main/java/org/schabi/newpipe/local/history/StatisticsPlaylistFragment.java
index 511e3c7a3..9750d9820 100644
--- a/app/src/main/java/org/schabi/newpipe/local/history/StatisticsPlaylistFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/local/history/StatisticsPlaylistFragment.java
@@ -49,9 +49,9 @@ import java.util.Comparator;
 import java.util.List;
 
 import icepick.State;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 public class StatisticsPlaylistFragment
         extends BaseLocalListFragment<List<StreamStatisticsEntry>, Void> {
diff --git a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java
index 71df07a4b..a8974e018 100644
--- a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java
@@ -55,13 +55,12 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import icepick.State;
-import io.reactivex.Flowable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.disposables.Disposables;
-import io.reactivex.schedulers.Schedulers;
-import io.reactivex.subjects.PublishSubject;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
+import io.reactivex.rxjava3.subjects.PublishSubject;
 
 import static org.schabi.newpipe.util.AnimationUtils.animateView;
 
@@ -641,7 +640,7 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
 
     private Disposable getDebouncedSaver() {
         if (debouncedSaveSignal == null) {
-            return Disposables.empty();
+            return Disposable.empty();
         }
 
         return debouncedSaveSignal
diff --git a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java
index d6101eb1d..33296aa84 100644
--- a/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java
+++ b/app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistManager.java
@@ -15,11 +15,11 @@ import org.schabi.newpipe.database.stream.model.StreamEntity;
 import java.util.ArrayList;
 import java.util.List;
 
-import io.reactivex.Completable;
-import io.reactivex.Flowable;
-import io.reactivex.Maybe;
-import io.reactivex.Single;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.core.Completable;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Maybe;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class LocalPlaylistManager {
     private final AppDatabase database;
diff --git a/app/src/main/java/org/schabi/newpipe/local/playlist/RemotePlaylistManager.java b/app/src/main/java/org/schabi/newpipe/local/playlist/RemotePlaylistManager.java
index 331eb5b08..5221139e3 100644
--- a/app/src/main/java/org/schabi/newpipe/local/playlist/RemotePlaylistManager.java
+++ b/app/src/main/java/org/schabi/newpipe/local/playlist/RemotePlaylistManager.java
@@ -7,9 +7,9 @@ import org.schabi.newpipe.extractor.playlist.PlaylistInfo;
 
 import java.util.List;
 
-import io.reactivex.Flowable;
-import io.reactivex.Single;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class RemotePlaylistManager {
 
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionFragment.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionFragment.kt
index b0d0fe801..64286dab3 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionFragment.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionFragment.kt
@@ -28,13 +28,7 @@ import com.xwray.groupie.Item
 import com.xwray.groupie.Section
 import com.xwray.groupie.kotlinandroidextensions.GroupieViewHolder
 import icepick.State
-import io.reactivex.disposables.CompositeDisposable
-import java.io.File
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
-import kotlin.math.floor
-import kotlin.math.max
+import io.reactivex.rxjava3.disposables.CompositeDisposable
 import kotlinx.android.synthetic.main.dialog_title.view.itemAdditionalDetails
 import kotlinx.android.synthetic.main.dialog_title.view.itemTitleView
 import kotlinx.android.synthetic.main.fragment_subscription.items_list
@@ -68,6 +62,12 @@ import org.schabi.newpipe.util.NavigationHelper
 import org.schabi.newpipe.util.OnClickGesture
 import org.schabi.newpipe.util.ShareUtils
 import org.schabi.newpipe.util.ThemeHelper
+import java.io.File
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+import kotlin.math.floor
+import kotlin.math.max
 
 class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
     private lateinit var viewModel: SubscriptionViewModel
@@ -208,14 +208,19 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
                 if (!exportFile.parentFile.canWrite() || !exportFile.parentFile.canRead()) {
                     Toast.makeText(activity, R.string.invalid_directory, Toast.LENGTH_SHORT).show()
                 } else {
-                    activity.startService(Intent(activity, SubscriptionsExportService::class.java)
-                            .putExtra(KEY_FILE_PATH, exportFile.absolutePath))
+                    activity.startService(
+                        Intent(activity, SubscriptionsExportService::class.java)
+                            .putExtra(KEY_FILE_PATH, exportFile.absolutePath)
+                    )
                 }
             } else if (requestCode == REQUEST_IMPORT_CODE) {
                 val path = Utils.getFileForUri(data.data!!).absolutePath
-                ImportConfirmationDialog.show(this, Intent(activity, SubscriptionsImportService::class.java)
+                ImportConfirmationDialog.show(
+                    this,
+                    Intent(activity, SubscriptionsImportService::class.java)
                         .putExtra(KEY_MODE, PREVIOUS_EXPORT_MODE)
-                        .putExtra(KEY_VALUE, path))
+                        .putExtra(KEY_VALUE, path)
+                )
             }
         }
     }
@@ -247,9 +252,9 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
 
             feedGroupsCarousel = FeedGroupCarouselItem(requireContext(), carouselAdapter)
             feedGroupsSortMenuItem = HeaderWithMenuItem(
-                    getString(R.string.feed_groups_header_title),
-                    ThemeHelper.resolveResourceIdFromAttr(requireContext(), R.attr.ic_sort),
-                    menuItemOnClickListener = ::openReorderDialog
+                getString(R.string.feed_groups_header_title),
+                ThemeHelper.resolveResourceIdFromAttr(requireContext(), R.attr.ic_sort),
+                menuItemOnClickListener = ::openReorderDialog
             )
             add(Section(feedGroupsSortMenuItem, listOf(feedGroupsCarousel)))
 
@@ -260,10 +265,11 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
         subscriptionsSection.setHideWhenEmpty(true)
 
         importExportItem = FeedImportExportItem(
-                { onImportPreviousSelected() },
-                { onImportFromServiceSelected(it) },
-                { onExportSelected() },
-                importExportItemExpandedState ?: false)
+            { onImportPreviousSelected() },
+            { onImportFromServiceSelected(it) },
+            { onExportSelected() },
+            importExportItemExpandedState ?: false
+        )
         groupAdapter.add(Section(importExportItem, listOf(subscriptionsSection)))
     }
 
@@ -284,8 +290,8 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
 
     private fun showLongTapDialog(selectedItem: ChannelInfoItem) {
         val commands = arrayOf(
-                getString(R.string.share),
-                getString(R.string.unsubscribe)
+            getString(R.string.share),
+            getString(R.string.unsubscribe)
         )
 
         val actions = DialogInterface.OnClickListener { _, i ->
@@ -301,16 +307,18 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
         bannerView.itemAdditionalDetails.visibility = View.GONE
 
         AlertDialog.Builder(requireContext())
-                .setCustomTitle(bannerView)
-                .setItems(commands, actions)
-                .create()
-                .show()
+            .setCustomTitle(bannerView)
+            .setItems(commands, actions)
+            .create()
+            .show()
     }
 
     private fun deleteChannel(selectedItem: ChannelInfoItem) {
-        disposables.add(subscriptionManager.deleteSubscription(selectedItem.serviceId, selectedItem.url).subscribe {
-            Toast.makeText(requireContext(), getString(R.string.channel_unsubscribed), Toast.LENGTH_SHORT).show()
-        })
+        disposables.add(
+            subscriptionManager.deleteSubscription(selectedItem.serviceId, selectedItem.url).subscribe {
+                Toast.makeText(requireContext(), getString(R.string.channel_unsubscribed), Toast.LENGTH_SHORT).show()
+            }
+        )
     }
 
     override fun doInitialLoadLogic() = Unit
@@ -332,8 +340,10 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
     }
 
     private val listenerChannelItem = object : OnClickGesture<ChannelInfoItem>() {
-        override fun selected(selectedItem: ChannelInfoItem) = NavigationHelper.openChannelFragment(fm,
-                selectedItem.serviceId, selectedItem.url, selectedItem.name)
+        override fun selected(selectedItem: ChannelInfoItem) = NavigationHelper.openChannelFragment(
+            fm,
+            selectedItem.serviceId, selectedItem.url, selectedItem.name
+        )
 
         override fun held(selectedItem: ChannelInfoItem) = showLongTapDialog(selectedItem)
     }
@@ -420,14 +430,16 @@ class SubscriptionFragment : BaseStateFragment<SubscriptionState>() {
 
     private fun shouldUseGridLayout(): Boolean {
         val listMode = PreferenceManager.getDefaultSharedPreferences(requireContext())
-                .getString(getString(R.string.list_view_mode_key), getString(R.string.list_view_mode_value))
+            .getString(getString(R.string.list_view_mode_key), getString(R.string.list_view_mode_value))
 
         return when (listMode) {
             getString(R.string.list_view_mode_auto_key) -> {
                 val configuration = resources.configuration
 
-                (configuration.orientation == Configuration.ORIENTATION_LANDSCAPE &&
-                        configuration.isLayoutSizeAtLeast(Configuration.SCREENLAYOUT_SIZE_LARGE))
+                (
+                    configuration.orientation == Configuration.ORIENTATION_LANDSCAPE &&
+                        configuration.isLayoutSizeAtLeast(Configuration.SCREENLAYOUT_SIZE_LARGE)
+                    )
             }
             getString(R.string.list_view_mode_grid_key) -> true
             else -> false
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionManager.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionManager.kt
index 2740591e6..fb9cffa98 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionManager.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionManager.kt
@@ -1,10 +1,10 @@
 package org.schabi.newpipe.local.subscription
 
 import android.content.Context
-import io.reactivex.Completable
-import io.reactivex.Flowable
-import io.reactivex.android.schedulers.AndroidSchedulers
-import io.reactivex.schedulers.Schedulers
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.core.Completable
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.schedulers.Schedulers
 import org.schabi.newpipe.NewPipeDatabase
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.database.subscription.SubscriptionDAO
@@ -32,7 +32,8 @@ class SubscriptionManager(context: Context) {
             filterQuery.isNotEmpty() -> {
                 return if (showOnlyUngrouped) {
                     subscriptionTable.getSubscriptionsOnlyUngroupedFiltered(
-                        currentGroupId, filterQuery)
+                        currentGroupId, filterQuery
+                    )
                 } else {
                     subscriptionTable.getSubscriptionsFiltered(filterQuery)
                 }
@@ -44,7 +45,8 @@ class SubscriptionManager(context: Context) {
 
     fun upsertAll(infoList: List<ChannelInfo>): List<SubscriptionEntity> {
         val listEntities = subscriptionTable.upsertAll(
-            infoList.map { SubscriptionEntity.from(it) })
+            infoList.map { SubscriptionEntity.from(it) }
+        )
 
         database.runInTransaction {
             infoList.forEachIndexed { index, info ->
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionViewModel.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionViewModel.kt
index b7f16c319..da009e1a0 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionViewModel.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionViewModel.kt
@@ -5,12 +5,12 @@ import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import com.xwray.groupie.Group
-import io.reactivex.schedulers.Schedulers
-import java.util.concurrent.TimeUnit
+import io.reactivex.rxjava3.schedulers.Schedulers
 import org.schabi.newpipe.local.feed.FeedDatabaseManager
 import org.schabi.newpipe.local.subscription.item.ChannelItem
 import org.schabi.newpipe.local.subscription.item.FeedGroupCardItem
 import org.schabi.newpipe.util.DEFAULT_THROTTLE_TIMEOUT
+import java.util.concurrent.TimeUnit
 
 class SubscriptionViewModel(application: Application) : AndroidViewModel(application) {
     private var feedDatabaseManager: FeedDatabaseManager = FeedDatabaseManager(application)
@@ -22,22 +22,22 @@ class SubscriptionViewModel(application: Application) : AndroidViewModel(applica
     val feedGroupsLiveData: LiveData<List<Group>> = mutableFeedGroupsLiveData
 
     private var feedGroupItemsDisposable = feedDatabaseManager.groups()
-            .throttleLatest(DEFAULT_THROTTLE_TIMEOUT, TimeUnit.MILLISECONDS)
-            .map { it.map(::FeedGroupCardItem) }
-            .subscribeOn(Schedulers.io())
-            .subscribe(
-                    { mutableFeedGroupsLiveData.postValue(it) },
-                    { mutableStateLiveData.postValue(SubscriptionState.ErrorState(it)) }
-            )
+        .throttleLatest(DEFAULT_THROTTLE_TIMEOUT, TimeUnit.MILLISECONDS)
+        .map { it.map(::FeedGroupCardItem) }
+        .subscribeOn(Schedulers.io())
+        .subscribe(
+            { mutableFeedGroupsLiveData.postValue(it) },
+            { mutableStateLiveData.postValue(SubscriptionState.ErrorState(it)) }
+        )
 
     private var stateItemsDisposable = subscriptionManager.subscriptions()
-            .throttleLatest(DEFAULT_THROTTLE_TIMEOUT, TimeUnit.MILLISECONDS)
-            .map { it.map { entity -> ChannelItem(entity.toChannelInfoItem(), entity.uid, ChannelItem.ItemVersion.MINI) } }
-            .subscribeOn(Schedulers.io())
-            .subscribe(
-                    { mutableStateLiveData.postValue(SubscriptionState.LoadedState(it)) },
-                    { mutableStateLiveData.postValue(SubscriptionState.ErrorState(it)) }
-            )
+        .throttleLatest(DEFAULT_THROTTLE_TIMEOUT, TimeUnit.MILLISECONDS)
+        .map { it.map { entity -> ChannelItem(entity.toChannelInfoItem(), entity.uid, ChannelItem.ItemVersion.MINI) } }
+        .subscribeOn(Schedulers.io())
+        .subscribe(
+            { mutableStateLiveData.postValue(SubscriptionState.LoadedState(it)) },
+            { mutableStateLiveData.postValue(SubscriptionState.ErrorState(it)) }
+        )
 
     override fun onCleared() {
         super.onCleared()
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
index 9f82aefb7..1d5650a99 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialog.kt
@@ -24,8 +24,6 @@ import com.xwray.groupie.Section
 import com.xwray.groupie.kotlinandroidextensions.GroupieViewHolder
 import icepick.Icepick
 import icepick.State
-import java.io.Serializable
-import kotlin.collections.contains
 import kotlinx.android.synthetic.main.dialog_feed_group_create.*
 import kotlinx.android.synthetic.main.toolbar_search_layout.*
 import org.schabi.newpipe.R
@@ -43,6 +41,8 @@ import org.schabi.newpipe.local.subscription.item.PickerIconItem
 import org.schabi.newpipe.local.subscription.item.PickerSubscriptionItem
 import org.schabi.newpipe.util.DeviceUtils
 import org.schabi.newpipe.util.ThemeHelper
+import java.io.Serializable
+import kotlin.collections.contains
 
 class FeedGroupDialog : DialogFragment(), BackPressable {
     private lateinit var viewModel: FeedGroupDialogViewModel
@@ -116,21 +116,30 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
 
-        viewModel = ViewModelProvider(this,
-            FeedGroupDialogViewModel.Factory(requireContext(),
-                groupId, subscriptionsCurrentSearchQuery, subscriptionsShowOnlyUngrouped)
+        viewModel = ViewModelProvider(
+            this,
+            FeedGroupDialogViewModel.Factory(
+                requireContext(),
+                groupId, subscriptionsCurrentSearchQuery, subscriptionsShowOnlyUngrouped
+            )
         ).get(FeedGroupDialogViewModel::class.java)
 
         viewModel.groupLiveData.observe(viewLifecycleOwner, Observer(::handleGroup))
-        viewModel.subscriptionsLiveData.observe(viewLifecycleOwner, Observer {
-            setupSubscriptionPicker(it.first, it.second)
-        })
-        viewModel.dialogEventLiveData.observe(viewLifecycleOwner, Observer {
-            when (it) {
-                ProcessingEvent -> disableInput()
-                SuccessEvent -> dismiss()
+        viewModel.subscriptionsLiveData.observe(
+            viewLifecycleOwner,
+            Observer {
+                setupSubscriptionPicker(it.first, it.second)
             }
-        })
+        )
+        viewModel.dialogEventLiveData.observe(
+            viewLifecycleOwner,
+            Observer {
+                when (it) {
+                    ProcessingEvent -> disableInput()
+                    SuccessEvent -> dismiss()
+                }
+            }
+        )
 
         subscriptionGroupAdapter = GroupAdapter<GroupieViewHolder>().apply {
             add(subscriptionMainSection)
@@ -141,8 +150,10 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
             // Disable animations, too distracting.
             itemAnimator = null
             adapter = subscriptionGroupAdapter
-            layoutManager = GridLayoutManager(requireContext(), subscriptionGroupAdapter.spanCount,
-                RecyclerView.VERTICAL, false).apply {
+            layoutManager = GridLayoutManager(
+                requireContext(), subscriptionGroupAdapter.spanCount,
+                RecyclerView.VERTICAL, false
+            ).apply {
                 spanSizeLookup = subscriptionGroupAdapter.spanSizeLookup
             }
         }
@@ -346,7 +357,8 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
         val selectedCount = this.selectedSubscriptions.size
         val selectedCountText = resources.getQuantityString(
             R.plurals.feed_group_dialog_selection_count,
-            selectedCount, selectedCount)
+            selectedCount, selectedCount
+        )
         selected_subscription_count_view.text = selectedCountText
         subscriptions_header_info.text = selectedCountText
     }
@@ -401,10 +413,12 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
         separator.onlyVisibleIn(SubscriptionsPickerScreen, IconPickerScreen)
         cancel_button.onlyVisibleIn(InitialScreen, DeleteScreen)
 
-        confirm_button.setText(when {
-            currentScreen == InitialScreen && groupId == NO_GROUP_SELECTED -> R.string.create
-            else -> android.R.string.ok
-        })
+        confirm_button.setText(
+            when {
+                currentScreen == InitialScreen && groupId == NO_GROUP_SELECTED -> R.string.create
+                else -> android.R.string.ok
+            }
+        )
 
         delete_button.isGone = currentScreen != InitialScreen || groupId == NO_GROUP_SELECTED
 
@@ -454,8 +468,10 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
     }
 
     private fun hideKeyboardSearch() {
-        inputMethodManager.hideSoftInputFromWindow(toolbar_search_edit_text.windowToken,
-            InputMethodManager.RESULT_UNCHANGED_SHOWN)
+        inputMethodManager.hideSoftInputFromWindow(
+            toolbar_search_edit_text.windowToken,
+            InputMethodManager.RESULT_UNCHANGED_SHOWN
+        )
         toolbar_search_edit_text.clearFocus()
     }
 
@@ -466,8 +482,10 @@ class FeedGroupDialog : DialogFragment(), BackPressable {
     }
 
     private fun hideKeyboard() {
-        inputMethodManager.hideSoftInputFromWindow(group_name_input.windowToken,
-            InputMethodManager.RESULT_UNCHANGED_SHOWN)
+        inputMethodManager.hideSoftInputFromWindow(
+            group_name_input.windowToken,
+            InputMethodManager.RESULT_UNCHANGED_SHOWN
+        )
         group_name_input.clearFocus()
     }
 
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt
index 4b1a4df5e..d49df6303 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupDialogViewModel.kt
@@ -5,12 +5,12 @@ import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
-import io.reactivex.Completable
-import io.reactivex.Flowable
-import io.reactivex.disposables.Disposable
-import io.reactivex.functions.BiFunction
-import io.reactivex.processors.BehaviorProcessor
-import io.reactivex.schedulers.Schedulers
+import io.reactivex.rxjava3.core.Completable
+import io.reactivex.rxjava3.core.Flowable
+import io.reactivex.rxjava3.disposables.Disposable
+import io.reactivex.rxjava3.functions.BiFunction
+import io.reactivex.rxjava3.processors.BehaviorProcessor
+import io.reactivex.rxjava3.schedulers.Schedulers
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.local.feed.FeedDatabaseManager
 import org.schabi.newpipe.local.subscription.FeedGroupIcon
@@ -32,9 +32,9 @@ class FeedGroupDialogViewModel(
 
     private var subscriptionsFlowable = Flowable
         .combineLatest(
-                filterSubscriptions.startWith(initialQuery),
-                toggleShowOnlyUngrouped.startWith(initialShowOnlyUngrouped),
-                BiFunction { t1: String, t2: Boolean -> Filter(t1, t2) }
+            filterSubscriptions.startWithItem(initialQuery),
+            toggleShowOnlyUngrouped.startWithItem(initialShowOnlyUngrouped),
+            BiFunction { t1: String, t2: Boolean -> Filter(t1, t2) }
         )
         .distinctUntilChanged()
         .switchMap { (query, showOnlyUngrouped) ->
@@ -55,8 +55,10 @@ class FeedGroupDialogViewModel(
         .subscribe(mutableGroupLiveData::postValue)
 
     private var subscriptionsDisposable = Flowable
-        .combineLatest(subscriptionsFlowable, feedDatabaseManager.subscriptionIdsForGroup(groupId),
-            BiFunction { t1: List<PickerSubscriptionItem>, t2: List<Long> -> t1 to t2.toSet() })
+        .combineLatest(
+            subscriptionsFlowable, feedDatabaseManager.subscriptionIdsForGroup(groupId),
+            BiFunction { t1: List<PickerSubscriptionItem>, t2: List<Long> -> t1 to t2.toSet() }
+        )
         .subscribeOn(Schedulers.io())
         .subscribe(mutableSubscriptionsLiveData::postValue)
 
@@ -68,15 +70,19 @@ class FeedGroupDialogViewModel(
     }
 
     fun createGroup(name: String, selectedIcon: FeedGroupIcon, selectedSubscriptions: Set<Long>) {
-        doAction(feedDatabaseManager.createGroup(name, selectedIcon)
-            .flatMapCompletable {
-                feedDatabaseManager.updateSubscriptionsForGroup(it, selectedSubscriptions.toList())
-            })
+        doAction(
+            feedDatabaseManager.createGroup(name, selectedIcon)
+                .flatMapCompletable {
+                    feedDatabaseManager.updateSubscriptionsForGroup(it, selectedSubscriptions.toList())
+                }
+        )
     }
 
     fun updateGroup(name: String, selectedIcon: FeedGroupIcon, selectedSubscriptions: Set<Long>, sortOrder: Long) {
-        doAction(feedDatabaseManager.updateSubscriptionsForGroup(groupId, selectedSubscriptions.toList())
-            .andThen(feedDatabaseManager.updateGroup(FeedGroupEntity(groupId, name, selectedIcon, sortOrder))))
+        doAction(
+            feedDatabaseManager.updateSubscriptionsForGroup(groupId, selectedSubscriptions.toList())
+                .andThen(feedDatabaseManager.updateGroup(FeedGroupEntity(groupId, name, selectedIcon, sortOrder)))
+        )
     }
 
     fun deleteGroup() {
@@ -120,8 +126,10 @@ class FeedGroupDialogViewModel(
     ) : ViewModelProvider.Factory {
         @Suppress("UNCHECKED_CAST")
         override fun <T : ViewModel?> create(modelClass: Class<T>): T {
-            return FeedGroupDialogViewModel(context.applicationContext,
-                groupId, initialQuery, initialShowOnlyUngrouped) as T
+            return FeedGroupDialogViewModel(
+                context.applicationContext,
+                groupId, initialQuery, initialShowOnlyUngrouped
+            ) as T
         }
     }
 }
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialog.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialog.kt
index 48f40e219..380bf13f5 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialog.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialog.kt
@@ -16,7 +16,6 @@ import com.xwray.groupie.TouchCallback
 import com.xwray.groupie.kotlinandroidextensions.GroupieViewHolder
 import icepick.Icepick
 import icepick.State
-import java.util.Collections
 import kotlinx.android.synthetic.main.dialog_feed_group_reorder.confirm_button
 import kotlinx.android.synthetic.main.dialog_feed_group_reorder.feed_groups_list
 import org.schabi.newpipe.R
@@ -25,6 +24,7 @@ import org.schabi.newpipe.local.subscription.dialog.FeedGroupReorderDialogViewMo
 import org.schabi.newpipe.local.subscription.dialog.FeedGroupReorderDialogViewModel.DialogEvent.SuccessEvent
 import org.schabi.newpipe.local.subscription.item.FeedGroupReorderItem
 import org.schabi.newpipe.util.ThemeHelper
+import java.util.Collections
 
 class FeedGroupReorderDialog : DialogFragment() {
     private lateinit var viewModel: FeedGroupReorderDialogViewModel
@@ -51,12 +51,15 @@ class FeedGroupReorderDialog : DialogFragment() {
 
         viewModel = ViewModelProvider(this).get(FeedGroupReorderDialogViewModel::class.java)
         viewModel.groupsLiveData.observe(viewLifecycleOwner, Observer(::handleGroups))
-        viewModel.dialogEventLiveData.observe(viewLifecycleOwner, Observer {
-            when (it) {
-                ProcessingEvent -> disableInput()
-                SuccessEvent -> dismiss()
+        viewModel.dialogEventLiveData.observe(
+            viewLifecycleOwner,
+            Observer {
+                when (it) {
+                    ProcessingEvent -> disableInput()
+                    SuccessEvent -> dismiss()
+                }
             }
-        })
+        )
 
         feed_groups_list.layoutManager = LinearLayoutManager(requireContext())
         feed_groups_list.adapter = groupAdapter
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialogViewModel.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialogViewModel.kt
index ea2cbe98f..e1b3429b9 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialogViewModel.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/dialog/FeedGroupReorderDialogViewModel.kt
@@ -4,9 +4,9 @@ import android.app.Application
 import androidx.lifecycle.AndroidViewModel
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
-import io.reactivex.Completable
-import io.reactivex.disposables.Disposable
-import io.reactivex.schedulers.Schedulers
+import io.reactivex.rxjava3.core.Completable
+import io.reactivex.rxjava3.disposables.Disposable
+import io.reactivex.rxjava3.schedulers.Schedulers
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.local.feed.FeedDatabaseManager
 
@@ -21,9 +21,9 @@ class FeedGroupReorderDialogViewModel(application: Application) : AndroidViewMod
     private var actionProcessingDisposable: Disposable? = null
 
     private var groupsDisposable = feedDatabaseManager.groups()
-            .limit(1)
-            .subscribeOn(Schedulers.io())
-            .subscribe(mutableGroupsLiveData::postValue)
+        .take(1)
+        .subscribeOn(Schedulers.io())
+        .subscribe(mutableGroupsLiveData::postValue)
 
     override fun onCleared() {
         super.onCleared()
@@ -40,8 +40,8 @@ class FeedGroupReorderDialogViewModel(application: Application) : AndroidViewMod
             mutableDialogEventLiveData.value = DialogEvent.ProcessingEvent
 
             actionProcessingDisposable = completable
-                    .subscribeOn(Schedulers.io())
-                    .subscribe { mutableDialogEventLiveData.postValue(DialogEvent.SuccessEvent) }
+                .subscribeOn(Schedulers.io())
+                .subscribe { mutableDialogEventLiveData.postValue(DialogEvent.SuccessEvent) }
         }
     }
 
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/item/ChannelItem.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/item/ChannelItem.kt
index f33c58f43..8089f6480 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/item/ChannelItem.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/item/ChannelItem.kt
@@ -36,8 +36,10 @@ class ChannelItem(
         viewHolder.itemAdditionalDetails.text = getDetailLine(viewHolder.root.context)
         if (itemVersion == ItemVersion.NORMAL) viewHolder.itemChannelDescriptionView.text = infoItem.description
 
-        ImageLoader.getInstance().displayImage(infoItem.thumbnailUrl, viewHolder.itemThumbnailView,
-                ImageDisplayConstants.DISPLAY_THUMBNAIL_OPTIONS)
+        ImageLoader.getInstance().displayImage(
+            infoItem.thumbnailUrl, viewHolder.itemThumbnailView,
+            ImageDisplayConstants.DISPLAY_THUMBNAIL_OPTIONS
+        )
 
         gesturesListener?.run {
             viewHolder.containerView.setOnClickListener { selected(infoItem) }
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedGroupReorderItem.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedGroupReorderItem.kt
index 717e2410a..e56bb408c 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedGroupReorderItem.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedGroupReorderItem.kt
@@ -20,7 +20,7 @@ data class FeedGroupReorderItem(
     val dragCallback: ItemTouchHelper
 ) : Item() {
     constructor (feedGroupEntity: FeedGroupEntity, dragCallback: ItemTouchHelper) :
-            this(feedGroupEntity.uid, feedGroupEntity.name, feedGroupEntity.icon, dragCallback)
+        this(feedGroupEntity.uid, feedGroupEntity.name, feedGroupEntity.icon, dragCallback)
 
     override fun getId(): Long {
         return when (groupId) {
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedImportExportItem.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedImportExportItem.kt
index 5478dcac4..5fd70a684 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedImportExportItem.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/item/FeedImportExportItem.kt
@@ -49,8 +49,10 @@ class FeedImportExportItem(
 
         expandIconListener?.let { viewHolder.import_export_options.removeListener(it) }
         expandIconListener = CollapsibleView.StateListener { newState ->
-            AnimationUtils.animateRotation(viewHolder.import_export_expand_icon,
-                    250, if (newState == CollapsibleView.COLLAPSED) 0 else 180)
+            AnimationUtils.animateRotation(
+                viewHolder.import_export_expand_icon,
+                250, if (newState == CollapsibleView.COLLAPSED) 0 else 180
+            )
         }
 
         viewHolder.import_export_options.currentState = if (isExpanded) CollapsibleView.EXPANDED else CollapsibleView.COLLAPSED
@@ -85,8 +87,10 @@ class FeedImportExportItem(
     }
 
     private fun setupImportFromItems(listHolder: ViewGroup) {
-        val previousBackupItem = addItemView(listHolder.context.getString(R.string.previous_export),
-                ThemeHelper.resolveResourceIdFromAttr(listHolder.context, R.attr.ic_backup), listHolder)
+        val previousBackupItem = addItemView(
+            listHolder.context.getString(R.string.previous_export),
+            ThemeHelper.resolveResourceIdFromAttr(listHolder.context, R.attr.ic_backup), listHolder
+        )
         previousBackupItem.setOnClickListener { onImportPreviousSelected() }
 
         val iconColor = if (ThemeHelper.isLightThemeSelected(listHolder.context)) Color.BLACK else Color.WHITE
@@ -112,8 +116,10 @@ class FeedImportExportItem(
     }
 
     private fun setupExportToItems(listHolder: ViewGroup) {
-        val previousBackupItem = addItemView(listHolder.context.getString(R.string.file),
-                ThemeHelper.resolveResourceIdFromAttr(listHolder.context, R.attr.ic_save), listHolder)
+        val previousBackupItem = addItemView(
+            listHolder.context.getString(R.string.file),
+            ThemeHelper.resolveResourceIdFromAttr(listHolder.context, R.attr.ic_save), listHolder
+        )
         previousBackupItem.setOnClickListener { onExportSelected() }
     }
 }
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/item/HeaderWithMenuItem.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/item/HeaderWithMenuItem.kt
index 142bba433..b5aa6b1d0 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/item/HeaderWithMenuItem.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/item/HeaderWithMenuItem.kt
@@ -36,11 +36,11 @@ class HeaderWithMenuItem(
         viewHolder.header_menu_item.setImageResource(itemIcon)
 
         val listener: OnClickListener? =
-                onClickListener?.let { OnClickListener { onClickListener.invoke() } }
+            onClickListener?.let { OnClickListener { onClickListener.invoke() } }
         viewHolder.root.setOnClickListener(listener)
 
         val menuItemListener: OnClickListener? =
-                menuItemOnClickListener?.let { OnClickListener { menuItemOnClickListener.invoke() } }
+            menuItemOnClickListener?.let { OnClickListener { menuItemOnClickListener.invoke() } }
         viewHolder.header_menu_item.setOnClickListener(menuItemListener)
         updateMenuItemVisibility(viewHolder)
     }
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/item/PickerSubscriptionItem.kt b/app/src/main/java/org/schabi/newpipe/local/subscription/item/PickerSubscriptionItem.kt
index df84c115a..fd98d0447 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/item/PickerSubscriptionItem.kt
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/item/PickerSubscriptionItem.kt
@@ -22,8 +22,10 @@ data class PickerSubscriptionItem(
     override fun getSpanSize(spanCount: Int, position: Int): Int = 1
 
     override fun bind(viewHolder: GroupieViewHolder, position: Int) {
-        ImageLoader.getInstance().displayImage(subscriptionEntity.avatarUrl,
-                viewHolder.thumbnail_view, ImageDisplayConstants.DISPLAY_AVATAR_OPTIONS)
+        ImageLoader.getInstance().displayImage(
+            subscriptionEntity.avatarUrl,
+            viewHolder.thumbnail_view, ImageDisplayConstants.DISPLAY_AVATAR_OPTIONS
+        )
 
         viewHolder.title_view.text = subscriptionEntity.name
         viewHolder.selected_highlight.isVisible = isSelected
@@ -39,7 +41,9 @@ data class PickerSubscriptionItem(
 
     fun updateSelected(containerView: View, isSelected: Boolean) {
         this.isSelected = isSelected
-        animateView(containerView.selected_highlight,
-                AnimationUtils.Type.LIGHT_SCALE_AND_ALPHA, isSelected, 150)
+        animateView(
+            containerView.selected_highlight,
+            AnimationUtils.Type.LIGHT_SCALE_AND_ALPHA, isSelected, 150
+        )
     }
 }
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/services/BaseImportExportService.java b/app/src/main/java/org/schabi/newpipe/local/subscription/services/BaseImportExportService.java
index 9b9a55afb..73c0d23a0 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/services/BaseImportExportService.java
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/services/BaseImportExportService.java
@@ -46,11 +46,11 @@ import java.util.Collections;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import io.reactivex.Flowable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.functions.Function;
-import io.reactivex.processors.PublishProcessor;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.functions.Function;
+import io.reactivex.rxjava3.processors.PublishProcessor;
 
 public abstract class BaseImportExportService extends Service {
     protected final String TAG = this.getClass().getSimpleName();
@@ -120,7 +120,7 @@ public abstract class BaseImportExportService extends Service {
         startForeground(getNotificationId(), notificationBuilder.build());
 
         final Function<Flowable<String>, Publisher<String>> throttleAfterFirstEmission = flow ->
-                flow.limit(1).concatWith(flow.skip(1)
+                flow.take(1).concatWith(flow.skip(1)
                         .throttleLast(NOTIFICATION_SAMPLING_PERIOD, TimeUnit.MILLISECONDS));
 
         disposables.add(notificationUpdater
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsExportService.java b/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsExportService.java
index f7d099712..982701d1f 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsExportService.java
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsExportService.java
@@ -37,9 +37,9 @@ import java.io.FileOutputStream;
 import java.util.ArrayList;
 import java.util.List;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.functions.Function;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.functions.Function;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 import static org.schabi.newpipe.MainActivity.DEBUG;
 
diff --git a/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsImportService.java b/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsImportService.java
index 51afc9fda..b1c67719c 100644
--- a/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsImportService.java
+++ b/app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsImportService.java
@@ -46,12 +46,12 @@ import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
 
-import io.reactivex.Flowable;
-import io.reactivex.Notification;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.functions.Consumer;
-import io.reactivex.functions.Function;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.core.Notification;
+import io.reactivex.rxjava3.functions.Consumer;
+import io.reactivex.rxjava3.functions.Function;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 import static org.schabi.newpipe.MainActivity.DEBUG;
 
diff --git a/app/src/main/java/org/schabi/newpipe/player/BasePlayer.java b/app/src/main/java/org/schabi/newpipe/player/BasePlayer.java
index 4790dc029..ac205d2d4 100644
--- a/app/src/main/java/org/schabi/newpipe/player/BasePlayer.java
+++ b/app/src/main/java/org/schabi/newpipe/player/BasePlayer.java
@@ -27,13 +27,13 @@ import android.content.SharedPreferences;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.media.AudioManager;
-import androidx.preference.PreferenceManager;
 import android.util.Log;
 import android.view.View;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.preference.PreferenceManager;
 
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.DefaultRenderersFactory;
@@ -77,17 +77,16 @@ import org.schabi.newpipe.util.SerializedCache;
 
 import java.io.IOException;
 
-import io.reactivex.Observable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.disposables.SerialDisposable;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Observable;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.disposables.SerialDisposable;
 
 import static com.google.android.exoplayer2.Player.DISCONTINUITY_REASON_INTERNAL;
 import static com.google.android.exoplayer2.Player.DISCONTINUITY_REASON_PERIOD_TRANSITION;
 import static com.google.android.exoplayer2.Player.DISCONTINUITY_REASON_SEEK;
 import static com.google.android.exoplayer2.Player.DISCONTINUITY_REASON_SEEK_ADJUSTMENT;
-import static io.reactivex.android.schedulers.AndroidSchedulers.mainThread;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 
 /**
@@ -720,8 +719,9 @@ public abstract class BasePlayer implements
     }
 
     private Disposable getProgressReactor() {
-        return Observable.interval(PROGRESS_LOOP_INTERVAL_MILLIS, MILLISECONDS, mainThread())
-                .observeOn(mainThread())
+        return Observable.interval(PROGRESS_LOOP_INTERVAL_MILLIS, MILLISECONDS,
+                AndroidSchedulers.mainThread())
+                .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(ignored -> triggerProgressUpdate(),
                         error -> Log.e(TAG, "Progress update failure: ", error));
     }
@@ -1319,7 +1319,7 @@ public abstract class BasePlayer implements
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
         if (prefs.getBoolean(context.getString(R.string.enable_watch_history_key), true)) {
             final Disposable stateSaver = recordManager.saveStreamState(info, progress)
-                    .observeOn(mainThread())
+                    .observeOn(AndroidSchedulers.mainThread())
                     .doOnError((e) -> {
                         if (DEBUG) {
                             e.printStackTrace();
@@ -1339,7 +1339,7 @@ public abstract class BasePlayer implements
         if (prefs.getBoolean(context.getString(R.string.enable_watch_history_key), true)) {
             final Disposable stateSaver = queueItem.getStream()
                     .flatMapCompletable(info -> recordManager.saveStreamState(info, 0))
-                    .observeOn(mainThread())
+                    .observeOn(AndroidSchedulers.mainThread())
                     .doOnError((e) -> {
                         if (DEBUG) {
                             e.printStackTrace();
diff --git a/app/src/main/java/org/schabi/newpipe/player/event/BasePlayerGestureListener.kt b/app/src/main/java/org/schabi/newpipe/player/event/BasePlayerGestureListener.kt
index 5bd13a569..043e7f31d 100644
--- a/app/src/main/java/org/schabi/newpipe/player/event/BasePlayerGestureListener.kt
+++ b/app/src/main/java/org/schabi/newpipe/player/event/BasePlayerGestureListener.kt
@@ -118,22 +118,30 @@ abstract class BasePlayerGestureListener(
             initSecPointerX = event.getX(1)
             initSecPointerY = event.getY(1)
             // record distance between fingers
-            initPointerDistance = hypot(initFirstPointerX - initSecPointerX.toDouble(),
-                initFirstPointerY - initSecPointerY.toDouble())
+            initPointerDistance = hypot(
+                initFirstPointerX - initSecPointerX.toDouble(),
+                initFirstPointerY - initSecPointerY.toDouble()
+            )
 
             isResizing = true
         }
         if (event.action == MotionEvent.ACTION_MOVE && !isMovingInPopup && isResizing) {
             if (DEBUG) {
-                Log.d(TAG, "onTouch() ACTION_MOVE > v = [$v], e1.getRaw = [${event.rawX}" +
-                    ", ${event.rawY}]")
+                Log.d(
+                    TAG,
+                    "onTouch() ACTION_MOVE > v = [$v], e1.getRaw =" +
+                        "[${event.rawX}, ${event.rawY}]"
+                )
             }
             return handleMultiDrag(event)
         }
         if (event.action == MotionEvent.ACTION_UP) {
             if (DEBUG) {
-                Log.d(TAG, "onTouch() ACTION_UP > v = [$v], e1.getRaw = [${event.rawX}" +
-                    ", ${event.rawY}]")
+                Log.d(
+                    TAG,
+                    "onTouch() ACTION_UP > v = [$v], e1.getRaw =" +
+                        " [${event.rawX}, ${event.rawY}]"
+                )
             }
             if (isMovingInPopup) {
                 isMovingInPopup = false
@@ -163,18 +171,24 @@ abstract class BasePlayerGestureListener(
     private fun handleMultiDrag(event: MotionEvent): Boolean {
         if (initPointerDistance != -1.0 && event.pointerCount == 2) {
             // get the movements of the fingers
-            val firstPointerMove = hypot(event.getX(0) - initFirstPointerX.toDouble(),
-                event.getY(0) - initFirstPointerY.toDouble())
-            val secPointerMove = hypot(event.getX(1) - initSecPointerX.toDouble(),
-                event.getY(1) - initSecPointerY.toDouble())
+            val firstPointerMove = hypot(
+                event.getX(0) - initFirstPointerX.toDouble(),
+                event.getY(0) - initFirstPointerY.toDouble()
+            )
+            val secPointerMove = hypot(
+                event.getX(1) - initSecPointerX.toDouble(),
+                event.getY(1) - initSecPointerY.toDouble()
+            )
 
             // minimum threshold beyond which pinch gesture will work
             val minimumMove = ViewConfiguration.get(service).scaledTouchSlop
 
             if (max(firstPointerMove, secPointerMove) > minimumMove) {
                 // calculate current distance between the pointers
-                val currentPointerDistance = hypot(event.getX(0) - event.getX(1).toDouble(),
-                    event.getY(0) - event.getY(1).toDouble())
+                val currentPointerDistance = hypot(
+                    event.getX(0) - event.getX(1).toDouble(),
+                    event.getY(0) - event.getY(1).toDouble()
+                )
 
                 val popupWidth = playerImpl.popupWidth.toDouble()
                 // change co-ordinates of popup so the center stays at the same position
@@ -187,7 +201,8 @@ abstract class BasePlayerGestureListener(
 
                 playerImpl.updatePopupSize(
                     min(playerImpl.screenWidth.toDouble(), newWidth).toInt(),
-                    -1)
+                    -1
+                )
                 return true
             }
         }
@@ -316,22 +331,30 @@ abstract class BasePlayerGestureListener(
         }
 
         val isTouchingStatusBar: Boolean = initialEvent.y < getStatusBarHeight(service)
-        val isTouchingNavigationBar: Boolean = (initialEvent.y
-            > playerImpl.rootView.height - getNavigationBarHeight(service))
+        val isTouchingNavigationBar: Boolean =
+            initialEvent.y > (playerImpl.rootView.height - getNavigationBarHeight(service))
         if (isTouchingStatusBar || isTouchingNavigationBar) {
             return false
         }
 
         val insideThreshold = abs(movingEvent.y - initialEvent.y) <= MOVEMENT_THRESHOLD
-        if (!isMovingInMain && (insideThreshold || abs(distanceX) > abs(distanceY)) ||
-            playerImpl.currentState == BasePlayer.STATE_COMPLETED) {
+        if (
+            !isMovingInMain && (insideThreshold || abs(distanceX) > abs(distanceY)) ||
+            playerImpl.currentState == BasePlayer.STATE_COMPLETED
+        ) {
             return false
         }
 
         isMovingInMain = true
 
-        onScroll(MainPlayer.PlayerType.VIDEO, getDisplayHalfPortion(initialEvent),
-            initialEvent, movingEvent, distanceX, distanceY)
+        onScroll(
+            MainPlayer.PlayerType.VIDEO,
+            getDisplayHalfPortion(initialEvent),
+            initialEvent,
+            movingEvent,
+            distanceX,
+            distanceY
+        )
 
         return true
     }
@@ -373,8 +396,14 @@ abstract class BasePlayerGestureListener(
         playerImpl.popupLayoutParams.x = posX.toInt()
         playerImpl.popupLayoutParams.y = posY.toInt()
 
-        onScroll(MainPlayer.PlayerType.POPUP, getDisplayHalfPortion(initialEvent),
-            initialEvent, movingEvent, distanceX, distanceY)
+        onScroll(
+            MainPlayer.PlayerType.POPUP,
+            getDisplayHalfPortion(initialEvent),
+            initialEvent,
+            movingEvent,
+            distanceX,
+            distanceY
+        )
 
         playerImpl.windowManager
             .updateViewLayout(playerImpl.rootView, playerImpl.popupLayoutParams)
diff --git a/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java b/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java
index 056002b14..f3049d11d 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playback/MediaSourceManager.java
@@ -30,14 +30,14 @@ import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import io.reactivex.Observable;
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.internal.subscriptions.EmptySubscription;
-import io.reactivex.schedulers.Schedulers;
-import io.reactivex.subjects.PublishSubject;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Observable;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.internal.subscriptions.EmptySubscription;
+import io.reactivex.rxjava3.schedulers.Schedulers;
+import io.reactivex.rxjava3.subjects.PublishSubject;
 
 import static org.schabi.newpipe.player.mediasource.FailedMediaSource.MediaSourceResolutionException;
 import static org.schabi.newpipe.player.mediasource.FailedMediaSource.StreamInfoLoadException;
diff --git a/app/src/main/java/org/schabi/newpipe/player/playqueue/AbstractInfoPlayQueue.java b/app/src/main/java/org/schabi/newpipe/player/playqueue/AbstractInfoPlayQueue.java
index ec364c4df..17bb6f4c4 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playqueue/AbstractInfoPlayQueue.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playqueue/AbstractInfoPlayQueue.java
@@ -14,8 +14,8 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-import io.reactivex.SingleObserver;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.core.SingleObserver;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 abstract class AbstractInfoPlayQueue<T extends ListInfo, U extends InfoItem> extends PlayQueue {
     boolean isInitial;
diff --git a/app/src/main/java/org/schabi/newpipe/player/playqueue/ChannelPlayQueue.java b/app/src/main/java/org/schabi/newpipe/player/playqueue/ChannelPlayQueue.java
index 9e0d2b694..f85349797 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playqueue/ChannelPlayQueue.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playqueue/ChannelPlayQueue.java
@@ -9,8 +9,8 @@ import org.schabi.newpipe.util.ExtractorHelper;
 
 import java.util.List;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public final class ChannelPlayQueue extends AbstractInfoPlayQueue<ChannelInfo, ChannelInfoItem> {
     public ChannelPlayQueue(final ChannelInfoItem item) {
diff --git a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueue.java b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueue.java
index b8bb677e0..90a979872 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueue.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueue.java
@@ -21,10 +21,10 @@ import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
 
-import io.reactivex.BackpressureStrategy;
-import io.reactivex.Flowable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.subjects.BehaviorSubject;
+import io.reactivex.rxjava3.core.BackpressureStrategy;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.subjects.BehaviorSubject;
 
 /**
  * PlayQueue is responsible for keeping track of a list of streams and the index of
@@ -80,7 +80,7 @@ public abstract class PlayQueue implements Serializable {
 
         broadcastReceiver = eventBroadcast.toFlowable(BackpressureStrategy.BUFFER)
                 .observeOn(AndroidSchedulers.mainThread())
-                .startWith(new InitEvent());
+                .startWithItem(new InitEvent());
     }
 
     /**
diff --git a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueAdapter.java b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueAdapter.java
index d063766c2..462b9eb53 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueAdapter.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueAdapter.java
@@ -20,8 +20,8 @@ import org.schabi.newpipe.util.FallbackViewHolder;
 
 import java.util.List;
 
-import io.reactivex.Observer;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.core.Observer;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 /**
  * Created by Christian Schabesberger on 01.08.16.
diff --git a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueItem.java b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueItem.java
index 79efc03ae..1c38ebbca 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueItem.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlayQueueItem.java
@@ -10,8 +10,8 @@ import org.schabi.newpipe.util.ExtractorHelper;
 
 import java.io.Serializable;
 
-import io.reactivex.Single;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class PlayQueueItem implements Serializable {
     public static final long RECOVERY_UNSET = Long.MIN_VALUE;
diff --git a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlaylistPlayQueue.java b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlaylistPlayQueue.java
index 077702747..ac5dce9ba 100644
--- a/app/src/main/java/org/schabi/newpipe/player/playqueue/PlaylistPlayQueue.java
+++ b/app/src/main/java/org/schabi/newpipe/player/playqueue/PlaylistPlayQueue.java
@@ -8,8 +8,8 @@ import org.schabi.newpipe.util.ExtractorHelper;
 
 import java.util.List;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public final class PlaylistPlayQueue extends AbstractInfoPlayQueue<PlaylistInfo, PlaylistInfoItem> {
     public PlaylistPlayQueue(final PlaylistInfoItem item) {
diff --git a/app/src/main/java/org/schabi/newpipe/settings/HistorySettingsFragment.java b/app/src/main/java/org/schabi/newpipe/settings/HistorySettingsFragment.java
index e0cf2e4ad..98c1ffc30 100644
--- a/app/src/main/java/org/schabi/newpipe/settings/HistorySettingsFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/settings/HistorySettingsFragment.java
@@ -14,9 +14,9 @@ import org.schabi.newpipe.report.ErrorInfo;
 import org.schabi.newpipe.report.UserAction;
 import org.schabi.newpipe.util.InfoCache;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 public class HistorySettingsFragment extends BasePreferenceFragment {
     private String cacheWipeKey;
diff --git a/app/src/main/java/org/schabi/newpipe/settings/NotificationSettingsFragment.kt b/app/src/main/java/org/schabi/newpipe/settings/NotificationSettingsFragment.kt
index c68b699d3..e03aa4074 100644
--- a/app/src/main/java/org/schabi/newpipe/settings/NotificationSettingsFragment.kt
+++ b/app/src/main/java/org/schabi/newpipe/settings/NotificationSettingsFragment.kt
@@ -16,4 +16,4 @@ class NotificationSettingsFragment : BasePreferenceFragment() {
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/app/src/main/java/org/schabi/newpipe/settings/PeertubeInstanceListFragment.java b/app/src/main/java/org/schabi/newpipe/settings/PeertubeInstanceListFragment.java
index 1e23c513b..bd3cbf79d 100644
--- a/app/src/main/java/org/schabi/newpipe/settings/PeertubeInstanceListFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/settings/PeertubeInstanceListFragment.java
@@ -4,7 +4,6 @@ import android.annotation.SuppressLint;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.Bundle;
-import androidx.preference.PreferenceManager;
 import android.text.InputType;
 import android.view.LayoutInflater;
 import android.view.Menu;
@@ -26,6 +25,7 @@ import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.content.res.AppCompatResources;
 import androidx.appcompat.widget.AppCompatImageView;
 import androidx.fragment.app.Fragment;
+import androidx.preference.PreferenceManager;
 import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
@@ -44,11 +44,11 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class PeertubeInstanceListFragment extends Fragment {
     private static final int MENU_ITEM_RESTORE_ID = 123456;
diff --git a/app/src/main/java/org/schabi/newpipe/settings/SelectChannelFragment.java b/app/src/main/java/org/schabi/newpipe/settings/SelectChannelFragment.java
index f87b5cd2a..90537564a 100644
--- a/app/src/main/java/org/schabi/newpipe/settings/SelectChannelFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/settings/SelectChannelFragment.java
@@ -30,10 +30,10 @@ import java.util.List;
 import java.util.Vector;
 
 import de.hdodenhof.circleimageview.CircleImageView;
-import io.reactivex.Observer;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.core.Observer;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.disposables.Disposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 /**
  * Created by Christian Schabesberger on 26.09.17.
diff --git a/app/src/main/java/org/schabi/newpipe/settings/SelectPlaylistFragment.java b/app/src/main/java/org/schabi/newpipe/settings/SelectPlaylistFragment.java
index f2876f1ee..16ccd0953 100644
--- a/app/src/main/java/org/schabi/newpipe/settings/SelectPlaylistFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/settings/SelectPlaylistFragment.java
@@ -33,9 +33,9 @@ import org.schabi.newpipe.report.UserAction;
 import java.util.List;
 import java.util.Vector;
 
-import io.reactivex.Flowable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.Disposable;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Flowable;
+import io.reactivex.rxjava3.disposables.Disposable;
 
 public class SelectPlaylistFragment extends DialogFragment {
     /**
diff --git a/app/src/main/java/org/schabi/newpipe/util/CommentTextOnTouchListener.java b/app/src/main/java/org/schabi/newpipe/util/CommentTextOnTouchListener.java
index cf347e7c4..36f39a6e5 100644
--- a/app/src/main/java/org/schabi/newpipe/util/CommentTextOnTouchListener.java
+++ b/app/src/main/java/org/schabi/newpipe/util/CommentTextOnTouchListener.java
@@ -23,9 +23,9 @@ import org.schabi.newpipe.player.playqueue.SinglePlayQueue;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 
 public class CommentTextOnTouchListener implements View.OnTouchListener {
     public static final CommentTextOnTouchListener INSTANCE = new CommentTextOnTouchListener();
diff --git a/app/src/main/java/org/schabi/newpipe/util/ExceptionUtils.kt b/app/src/main/java/org/schabi/newpipe/util/ExceptionUtils.kt
index 528912ceb..0addb26fb 100644
--- a/app/src/main/java/org/schabi/newpipe/util/ExceptionUtils.kt
+++ b/app/src/main/java/org/schabi/newpipe/util/ExceptionUtils.kt
@@ -10,9 +10,11 @@ class ExceptionUtils {
          */
         @JvmStatic
         fun isInterruptedCaused(throwable: Throwable): Boolean {
-            return hasExactCause(throwable,
-                    InterruptedIOException::class.java,
-                    InterruptedException::class.java)
+            return hasExactCause(
+                throwable,
+                InterruptedIOException::class.java,
+                InterruptedException::class.java
+            )
         }
 
         /**
@@ -20,8 +22,10 @@ class ExceptionUtils {
          */
         @JvmStatic
         fun isNetworkRelated(throwable: Throwable): Boolean {
-            return hasAssignableCause(throwable,
-                    IOException::class.java)
+            return hasAssignableCause(
+                throwable,
+                IOException::class.java
+            )
         }
 
         /**
diff --git a/app/src/main/java/org/schabi/newpipe/util/ExtractorHelper.java b/app/src/main/java/org/schabi/newpipe/util/ExtractorHelper.java
index 91a38d8d8..650c5ae11 100644
--- a/app/src/main/java/org/schabi/newpipe/util/ExtractorHelper.java
+++ b/app/src/main/java/org/schabi/newpipe/util/ExtractorHelper.java
@@ -57,8 +57,8 @@ import org.schabi.newpipe.report.UserAction;
 import java.util.Collections;
 import java.util.List;
 
-import io.reactivex.Maybe;
-import io.reactivex.Single;
+import io.reactivex.rxjava3.core.Maybe;
+import io.reactivex.rxjava3.core.Single;
 
 public final class ExtractorHelper {
     private static final String TAG = ExtractorHelper.class.getSimpleName();
diff --git a/app/src/main/java/org/schabi/newpipe/util/StreamItemAdapter.java b/app/src/main/java/org/schabi/newpipe/util/StreamItemAdapter.java
index 2bfd27c47..9150b5c1a 100644
--- a/app/src/main/java/org/schabi/newpipe/util/StreamItemAdapter.java
+++ b/app/src/main/java/org/schabi/newpipe/util/StreamItemAdapter.java
@@ -23,9 +23,9 @@ import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.Callable;
 
-import io.reactivex.Single;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 import us.shandian.giga.util.Utility;
 
 /**
diff --git a/app/src/main/java/us/shandian/giga/get/MissionRecoveryInfo.kt b/app/src/main/java/us/shandian/giga/get/MissionRecoveryInfo.kt
index 568ae8d13..b2364f058 100644
--- a/app/src/main/java/us/shandian/giga/get/MissionRecoveryInfo.kt
+++ b/app/src/main/java/us/shandian/giga/get/MissionRecoveryInfo.kt
@@ -1,13 +1,13 @@
 package us.shandian.giga.get
 
 import android.os.Parcelable
-import java.io.Serializable
 import kotlinx.android.parcel.Parcelize
 import org.schabi.newpipe.extractor.MediaFormat
 import org.schabi.newpipe.extractor.stream.AudioStream
 import org.schabi.newpipe.extractor.stream.Stream
 import org.schabi.newpipe.extractor.stream.SubtitlesStream
 import org.schabi.newpipe.extractor.stream.VideoStream
+import java.io.Serializable
 
 @Parcelize
 class MissionRecoveryInfo(
@@ -62,10 +62,10 @@ class MissionRecoveryInfo(
             }
         }
         str.append(" format=")
-                .append(format.getName())
-                .append(' ')
-                .append(info)
-                .append('}')
+            .append(format.getName())
+            .append(' ')
+            .append(info)
+            .append('}')
         return str.toString()
     }
 }
diff --git a/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java b/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
index 07fe2fcc4..be7d78299 100644
--- a/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
+++ b/app/src/main/java/us/shandian/giga/ui/adapter/MissionAdapter.java
@@ -49,10 +49,10 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
 
-import io.reactivex.Observable;
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.schedulers.Schedulers;
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Observable;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
 import us.shandian.giga.get.DownloadMission;
 import us.shandian.giga.get.FinishedMission;
 import us.shandian.giga.get.Mission;
diff --git a/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt b/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt
index a0db83ba9..e6d4247ca 100644
--- a/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt
+++ b/app/src/test/java/org/schabi/newpipe/local/subscription/FeedGroupIconTest.kt
@@ -13,8 +13,10 @@ class FeedGroupIconTest {
             val added = usedIds.add(currentIcon.id)
             assertTrue("Repeated ids (current item: ${currentIcon.name} - ${currentIcon.id})", added)
 
-            assertEquals("Gap between ids detected (current item: ${currentIcon.name} - ${currentIcon.id} → should be: $shouldBeId)",
-                    shouldBeId, currentIcon.id)
+            assertEquals(
+                "Gap between ids detected (current item: ${currentIcon.name} - ${currentIcon.id} → should be: $shouldBeId)",
+                shouldBeId, currentIcon.id
+            )
         }
     }
 
diff --git a/app/src/test/java/org/schabi/newpipe/util/ExceptionUtilsTest.kt b/app/src/test/java/org/schabi/newpipe/util/ExceptionUtilsTest.kt
index 55dc9f469..2d897e379 100644
--- a/app/src/test/java/org/schabi/newpipe/util/ExceptionUtilsTest.kt
+++ b/app/src/test/java/org/schabi/newpipe/util/ExceptionUtilsTest.kt
@@ -1,14 +1,14 @@
 package org.schabi.newpipe.util
 
-import java.io.IOException
-import java.io.InterruptedIOException
-import java.net.SocketException
-import javax.net.ssl.SSLException
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertTrue
 import org.junit.Test
 import org.schabi.newpipe.util.ExceptionUtils.Companion.hasAssignableCause
 import org.schabi.newpipe.util.ExceptionUtils.Companion.hasExactCause
+import java.io.IOException
+import java.io.InterruptedIOException
+import java.net.SocketException
+import javax.net.ssl.SSLException
 
 class ExceptionUtilsTest {
     @Test fun `assignable causes`() {
diff --git a/app/src/test/java/org/schabi/newpipe/util/urlfinder/UrlFinderTest.kt b/app/src/test/java/org/schabi/newpipe/util/urlfinder/UrlFinderTest.kt
index 99f26e472..ac8e4c8da 100644
--- a/app/src/test/java/org/schabi/newpipe/util/urlfinder/UrlFinderTest.kt
+++ b/app/src/test/java/org/schabi/newpipe/util/urlfinder/UrlFinderTest.kt
@@ -9,7 +9,8 @@ import org.junit.Test
 class UrlFinderTest {
     @Test fun `first url from long text`() {
         val expected = "https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_"
-        val result = UrlFinder.firstUrlFromInput("""
+        val result = UrlFinder.firstUrlFromInput(
+            """
             |Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 
             |Eu tincidunt tortor aliquam nulla. URL: https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_ Sed dictum consequat dui. 
             |Pharetra diam sit amet nisl suscipit adipiscing bibendum est. 
@@ -18,13 +19,15 @@ class UrlFinderTest {
             |Dapibus ultrices in iaculis nunc sed augue lacus viverra. Nisl purus in mollis nunc. 
             |Viverra nibh cras pulvinar mattis. ####!@!@!@!#### Not this one: https://www.youtube.com/playlist?list=SHOULD_NOT Nunc sed blandit libero volutpat. 
             |Nisl tincidunt eget nullam non nisi est sit amet. Purus in massa tempor nec feugiat nisl pretium fusce id. 
-            |Vulputate eu scelerisque felis imperdiet proin fermentum leo vel.""".trimMargin())
+            |Vulputate eu scelerisque felis imperdiet proin fermentum leo vel.""".trimMargin()
+        )
 
         assertEquals(expected, result)
     }
 
     @Test fun `no url from long text`() {
-        val result = UrlFinder.firstUrlFromInput("""
+        val result = UrlFinder.firstUrlFromInput(
+            """
             |Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. 
             |Eu tincidunt tortor aliquam nulla. Sed dictum consequat dui. Pharetra diam sit amet nisl suscipit adipiscing bibendum est. 
             |Volutpat sed cras ornare arcu dui vivamus. Nulla posuere sollicitudin aliquam ultrices sagittis. 
@@ -32,7 +35,8 @@ class UrlFinderTest {
             |Dapibus ultrices in iaculis nunc sed augue lacus viverra. Nisl purus in mollis nunc. 
             |Viverra nibh cras pulvinar mattis. Not this one: sed blandit libero volutpat. 
             |Nisl tincidunt eget nullam non nisi est sit amet. Purus in massa tempor nec feugiat nisl pretium fusce id. 
-            |Vulputate eu scelerisque felis imperdiet proin fermentum leo vel.""".trimMargin())
+            |Vulputate eu scelerisque felis imperdiet proin fermentum leo vel.""".trimMargin()
+        )
 
         assertEquals(null, result)
     }
@@ -44,14 +48,20 @@ class UrlFinderTest {
     }
 
     @Test fun `normal urls`() {
-        assertEquals("https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_",
-                UrlFinder.firstUrlFromInput("https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_"))
+        assertEquals(
+            "https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_",
+            UrlFinder.firstUrlFromInput("https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_")
+        )
 
-        assertEquals("https://www.youtube.com/watch?v=dQw4w9WgXcQ",
-                UrlFinder.firstUrlFromInput("https://www.youtube.com/watch?v=dQw4w9WgXcQ"))
+        assertEquals(
+            "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+            UrlFinder.firstUrlFromInput("https://www.youtube.com/watch?v=dQw4w9WgXcQ")
+        )
 
-        assertEquals("http://www.youtube.com/watch?v=dQw4w9WgXcQ",
-                UrlFinder.firstUrlFromInput("http://www.youtube.com/watch?v=dQw4w9WgXcQ"))
+        assertEquals(
+            "http://www.youtube.com/watch?v=dQw4w9WgXcQ",
+            UrlFinder.firstUrlFromInput("http://www.youtube.com/watch?v=dQw4w9WgXcQ")
+        )
 
         assertEquals("https://www.google.com", UrlFinder.firstUrlFromInput("https://www.google.com"))
         assertEquals("http://www.google.com/test/", UrlFinder.firstUrlFromInput("http://www.google.com/test/"))
@@ -79,21 +89,33 @@ class UrlFinderTest {
     }
 
     @Test fun `random prefixes and suffixes`() {
-        assertEquals("https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_",
-                UrlFinder.firstUrlFromInput("$#!@#@!#https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_ @@@@@@@@@@@"))
+        assertEquals(
+            "https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_",
+            UrlFinder.firstUrlFromInput("$#!@#@!#https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_ @@@@@@@@@@@")
+        )
 
-        assertEquals("https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_",
-                UrlFinder.firstUrlFromInput("(___\"https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_\")))_"))
+        assertEquals(
+            "https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_",
+            UrlFinder.firstUrlFromInput("(___\"https://www.youtube.com/playlist?list=PLabcdefghij-ABCDEFGHIJ1234567890_\")))_")
+        )
 
-        assertEquals("https://www.youtube.com/watch?v=dQw4w9WgXcQ",
-                UrlFinder.firstUrlFromInput("              https://www.youtube.com/watch?v=dQw4w9WgXcQ           "))
+        assertEquals(
+            "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+            UrlFinder.firstUrlFromInput("              https://www.youtube.com/watch?v=dQw4w9WgXcQ           ")
+        )
 
-        assertEquals("https://www.youtube.com/watch?v=dQw4w9WgXcQ",
-                UrlFinder.firstUrlFromInput(" ------_---__-https://www.youtube.com/watch?v=dQw4w9WgXcQ !!!!!!"))
+        assertEquals(
+            "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+            UrlFinder.firstUrlFromInput(" ------_---__-https://www.youtube.com/watch?v=dQw4w9WgXcQ !!!!!!")
+        )
 
-        assertEquals("https://www.youtube.com/watch?v=dQw4w9WgXcQ",
-                UrlFinder.firstUrlFromInput("****https://www.youtube.com/watch?v=dQw4w9WgXcQ _"))
-        assertEquals("https://www.youtube.com/watch?v=dQw4w9WgXcQ",
-                UrlFinder.firstUrlFromInput("https://www.youtube.com/watch?v=dQw4w9WgXcQ\"Not PartOfTheUrl"))
+        assertEquals(
+            "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+            UrlFinder.firstUrlFromInput("****https://www.youtube.com/watch?v=dQw4w9WgXcQ _")
+        )
+        assertEquals(
+            "https://www.youtube.com/watch?v=dQw4w9WgXcQ",
+            UrlFinder.firstUrlFromInput("https://www.youtube.com/watch?v=dQw4w9WgXcQ\"Not PartOfTheUrl")
+        )
     }
 }
diff --git a/build.gradle b/build.gradle
index 6e9b57cac..acb201794 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.72'
+    ext.kotlin_version = '1.4.10'
     repositories {
         jcenter()
         google()
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ca28934d5..c02f7cf09 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,4 +1,4 @@
-#Sat Oct 17 06:10:46 IST 2020
+#Thu Oct 15 11:41:05 CEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME