Notifications about new streams

app/build.gradle

@@ -108,6 +108,7 @@ ext {
     leakCanaryVersion = '2.5'
     stethoVersion = '1.6.0'
     mockitoVersion = '3.6.0'
+    workVersion = '2.5.0'
 }
 
 configurations {
@@ -213,6 +214,8 @@ dependencies {
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     implementation 'androidx.webkit:webkit:1.4.0'
     implementation 'com.google.android.material:material:1.2.1'
+    implementation "androidx.work:work-runtime:${workVersion}"
+    implementation "androidx.work:work-rxjava2:${workVersion}"
 
 /** Third-party libraries **/
     // Instance state boilerplate elimination

app/src/debug/res/xml/main_settings.xml

@@ -40,6 +40,12 @@
         android:title="@string/settings_category_notification_title"
         app:iconSpaceReserved="false" />
 
+    <PreferenceScreen
+        android:fragment="org.schabi.newpipe.settings.NotificationsSettingsFragment"
+        android:icon="@drawable/ic_notifications"
+        android:title="@string/notifications"
+        app:iconSpaceReserved="false" />
+
     <PreferenceScreen
         android:fragment="org.schabi.newpipe.settings.UpdateSettingsFragment"
         android:icon="@drawable/ic_cloud_download"

app/src/main/java/org/schabi/newpipe/App.java

@@ -1,5 +1,7 @@
 package org.schabi.newpipe;
 
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.util.Log;
@@ -108,7 +110,6 @@ public class App extends MultiDexApplication {
                 && prefs.getBoolean(getString(R.string.show_image_indicators_key), false));
 
         configureRxJavaErrorHandler();
-
         // Check for new version
         disposable = CheckForNewAppVersion.checkNewVersion(this);
     }
@@ -249,9 +250,20 @@ public class App extends MultiDexApplication {
                 .setDescription(getString(R.string.hash_channel_description))
                 .build();
 
+        final NotificationChannel newStreamsChannel = new NotificationChannel(
+                getString(R.string.streams_notification_channel_id),
+                getString(R.string.streams_notification_channel_name),
+                NotificationManager.IMPORTANCE_DEFAULT
+        );
+        newStreamsChannel.setDescription(
+                getString(R.string.streams_notification_channel_description)
+        );
+        newStreamsChannel.enableVibration(false);
+
         final NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
-        notificationManager.createNotificationChannelsCompat(Arrays.asList(mainChannel,
+        notificationManager.createNotificationChannels(
-                appUpdateChannel, hashChannel));
+                Arrays.asList(mainChannel, appUpdateChannel, hashChannel, newStreamsChannel)
+        );
     }
 
     protected boolean isDisposedRxExceptionsReported() {

app/src/main/java/org/schabi/newpipe/MainActivity.java

@@ -69,6 +69,7 @@ import org.schabi.newpipe.fragments.BackPressable;
 import org.schabi.newpipe.fragments.MainFragment;
 import org.schabi.newpipe.fragments.detail.VideoDetailFragment;
 import org.schabi.newpipe.fragments.list.search.SearchFragment;
+import org.schabi.newpipe.notifications.NotificationWorker;
 import org.schabi.newpipe.player.Player;
 import org.schabi.newpipe.player.event.OnKeyDownListener;
 import org.schabi.newpipe.player.helper.PlayerHolder;
@@ -158,11 +159,11 @@ public class MainActivity extends AppCompatActivity {
         } catch (final Exception e) {
             ErrorActivity.reportUiErrorInSnackbar(this, "Setting up drawer", e);
         }
-
         if (DeviceUtils.isTv(this)) {
             FocusOverlayView.setupFocusObserver(this);
         }
         openMiniPlayerUponPlayerStarted();
+        NotificationWorker.schedule(this);
     }
 
     private void setupDrawer() throws Exception {

app/src/main/java/org/schabi/newpipe/NewPipeDatabase.java

@@ -1,5 +1,11 @@
 package org.schabi.newpipe;
 
+import static org.schabi.newpipe.database.AppDatabase.DATABASE_NAME;
+import static org.schabi.newpipe.database.Migrations.MIGRATION_1_2;
+import static org.schabi.newpipe.database.Migrations.MIGRATION_2_3;
+import static org.schabi.newpipe.database.Migrations.MIGRATION_3_4;
+import static org.schabi.newpipe.database.Migrations.MIGRATION_4_5;
+
 import android.content.Context;
 import android.database.Cursor;
 
@@ -8,11 +14,6 @@ import androidx.room.Room;
 
 import org.schabi.newpipe.database.AppDatabase;
 
-import static org.schabi.newpipe.database.AppDatabase.DATABASE_NAME;
-import static org.schabi.newpipe.database.Migrations.MIGRATION_1_2;
-import static org.schabi.newpipe.database.Migrations.MIGRATION_2_3;
-import static org.schabi.newpipe.database.Migrations.MIGRATION_3_4;
-
 public final class NewPipeDatabase {
     private static volatile AppDatabase databaseInstance;
 
@@ -23,7 +24,7 @@ public final class NewPipeDatabase {
     private static AppDatabase getDatabase(final Context context) {
         return Room
                 .databaseBuilder(context.getApplicationContext(), AppDatabase.class, DATABASE_NAME)
-                .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4)
+                .addMigrations(MIGRATION_1_2, MIGRATION_2_3, MIGRATION_3_4, MIGRATION_4_5)
                 .build();
     }
 

app/src/main/java/org/schabi/newpipe/database/AppDatabase.java

@@ -1,5 +1,7 @@
 package org.schabi.newpipe.database;
 
+import static org.schabi.newpipe.database.Migrations.DB_VER_5;
+
 import androidx.room.Database;
 import androidx.room.RoomDatabase;
 import androidx.room.TypeConverters;
@@ -27,8 +29,6 @@ import org.schabi.newpipe.database.stream.model.StreamStateEntity;
 import org.schabi.newpipe.database.subscription.SubscriptionDAO;
 import org.schabi.newpipe.database.subscription.SubscriptionEntity;
 
-import static org.schabi.newpipe.database.Migrations.DB_VER_4;
-
 @TypeConverters({Converters.class})
 @Database(
         entities = {
@@ -38,7 +38,7 @@ import static org.schabi.newpipe.database.Migrations.DB_VER_4;
                 FeedEntity.class, FeedGroupEntity.class, FeedGroupSubscriptionEntity.class,
                 FeedLastUpdatedEntity.class
         },
-        version = DB_VER_4
+        version = DB_VER_5
 )
 public abstract class AppDatabase extends RoomDatabase {
     public static final String DATABASE_NAME = "newpipe.db";

app/src/main/java/org/schabi/newpipe/database/Migrations.java

@@ -22,6 +22,7 @@ public final class Migrations {
     public static final int DB_VER_2 = 2;
     public static final int DB_VER_3 = 3;
     public static final int DB_VER_4 = 4;
+    public static final int DB_VER_5 = 5;
 
     private static final String TAG = Migrations.class.getName();
     public static final boolean DEBUG = MainActivity.DEBUG;
@@ -179,5 +180,14 @@ public final class Migrations {
         }
     };
 
-    private Migrations() { }
+    public static final Migration MIGRATION_4_5 = new Migration(DB_VER_4, DB_VER_5) {
+        @Override
+        public void migrate(@NonNull final SupportSQLiteDatabase database) {
+            database.execSQL("ALTER TABLE `subscriptions` ADD COLUMN `notification_mode` "
+                     + "INTEGER NOT NULL DEFAULT 0");
+        }
+    };
+
+    private Migrations() {
+    }
 }

app/src/main/java/org/schabi/newpipe/database/stream/dao/StreamDAO.kt

@@ -39,6 +39,9 @@ abstract class StreamDAO : BasicDAO<StreamEntity> {
     @Insert(onConflict = OnConflictStrategy.IGNORE)
     internal abstract fun silentInsertAllInternal(streams: List<StreamEntity>): List<Long>
 
+    @Query("SELECT COUNT(*) != 0 FROM streams WHERE url = :url AND service_id = :serviceId")
+    internal abstract fun exists(serviceId: Long, url: String?): Boolean
+
     @Query(
         """
         SELECT uid, stream_type, textual_upload_date, upload_date, is_upload_date_approximation, duration 

app/src/main/java/org/schabi/newpipe/database/subscription/NotificationMode.java

@@ -0,0 +1,14 @@
+package org.schabi.newpipe.database.subscription;
+
+import androidx.annotation.IntDef;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@IntDef({NotificationMode.DISABLED, NotificationMode.ENABLED_DEFAULT})
+@Retention(RetentionPolicy.SOURCE)
+public @interface NotificationMode {
+
+    int DISABLED = 0;
+    int ENABLED_DEFAULT = 1;
+    //other values reserved for the future
+}

app/src/main/java/org/schabi/newpipe/database/subscription/SubscriptionEntity.java

@@ -26,6 +26,7 @@ public class SubscriptionEntity {
     public static final String SUBSCRIPTION_AVATAR_URL = "avatar_url";
     public static final String SUBSCRIPTION_SUBSCRIBER_COUNT = "subscriber_count";
     public static final String SUBSCRIPTION_DESCRIPTION = "description";
+    public static final String SUBSCRIPTION_NOTIFICATION_MODE  = "notification_mode";
 
     @PrimaryKey(autoGenerate = true)
     private long uid = 0;
@@ -48,6 +49,9 @@ public class SubscriptionEntity {
     @ColumnInfo(name = SUBSCRIPTION_DESCRIPTION)
     private String description;
 
+    @ColumnInfo(name = SUBSCRIPTION_NOTIFICATION_MODE)
+    private int notificationMode;
+
     @Ignore
     public static SubscriptionEntity from(@NonNull final ChannelInfo info) {
         final SubscriptionEntity result = new SubscriptionEntity();
@@ -114,6 +118,15 @@ public class SubscriptionEntity {
         this.description = description;
     }
 
+    @NotificationMode
+    public int getNotificationMode() {
+        return notificationMode;
+    }
+
+    public void setNotificationMode(@NotificationMode final int notificationMode) {
+        this.notificationMode = notificationMode;
+    }
+
     @Ignore
     public void setData(final String n, final String au, final String d, final Long sc) {
         this.setName(n);

app/src/main/java/org/schabi/newpipe/fragments/list/channel/ChannelFragment.java

@@ -1,6 +1,11 @@
 package org.schabi.newpipe.fragments.list.channel;
 
+import static org.schabi.newpipe.ktx.TextViewUtils.animateTextColor;
+import static org.schabi.newpipe.ktx.ViewUtils.animate;
+import static org.schabi.newpipe.ktx.ViewUtils.animateBackgroundColor;
+
 import android.content.Context;
+import android.graphics.Color;
 import android.os.Bundle;
 import android.text.TextUtils;
 import android.util.Log;
@@ -19,9 +24,11 @@ import androidx.appcompat.app.ActionBar;
 import androidx.core.content.ContextCompat;
 import androidx.viewbinding.ViewBinding;
 
+import com.google.android.material.snackbar.Snackbar;
 import com.jakewharton.rxbinding4.view.RxView;
 
 import org.schabi.newpipe.R;
+import org.schabi.newpipe.database.subscription.NotificationMode;
 import org.schabi.newpipe.database.subscription.SubscriptionEntity;
 import org.schabi.newpipe.databinding.ChannelHeaderBinding;
 import org.schabi.newpipe.databinding.FragmentChannelBinding;
@@ -37,6 +44,7 @@ import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
 import org.schabi.newpipe.ktx.AnimationType;
 import org.schabi.newpipe.local.subscription.SubscriptionManager;
+import org.schabi.newpipe.notifications.NotificationHelper;
 import org.schabi.newpipe.player.playqueue.ChannelPlayQueue;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.util.ExtractorHelper;
@@ -60,10 +68,6 @@ import io.reactivex.rxjava3.functions.Consumer;
 import io.reactivex.rxjava3.functions.Function;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 
-import static org.schabi.newpipe.ktx.TextViewUtils.animateTextColor;
-import static org.schabi.newpipe.ktx.ViewUtils.animate;
-import static org.schabi.newpipe.ktx.ViewUtils.animateBackgroundColor;
-
 public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
         implements View.OnClickListener {
 
@@ -84,6 +88,7 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
     private PlaylistControlBinding playlistControlBinding;
 
     private MenuItem menuRssButton;
+    private MenuItem menuNotifyButton;
 
     public static ChannelFragment getInstance(final int serviceId, final String url,
                                               final String name) {
@@ -181,6 +186,7 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
                         + "menu = [" + menu + "], inflater = [" + inflater + "]");
             }
             menuRssButton = menu.findItem(R.id.menu_item_rss);
+            menuNotifyButton = menu.findItem(R.id.menu_item_notify);
         }
     }
 
@@ -197,6 +203,11 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
             case R.id.action_settings:
                 NavigationHelper.openSettings(requireContext());
                 break;
+            case R.id.menu_item_notify:
+                final boolean value = !item.isChecked();
+                item.setEnabled(false);
+                setNotify(value);
+                break;
             case R.id.menu_item_rss:
                 openRssFeed();
                 break;
@@ -238,15 +249,22 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
                 .subscribe(getSubscribeUpdateMonitor(info), onError));
 
         disposables.add(observable
-                // Some updates are very rapid
+                .map(List::isEmpty)
-                // (for example when calling the updateSubscription(info))
+                .distinctUntilChanged()
-                // so only update the UI for the latest emission
-                // ("sync" the subscribe button's state)
-                .debounce(100, TimeUnit.MILLISECONDS)
                 .observeOn(AndroidSchedulers.mainThread())
-                .subscribe((List<SubscriptionEntity> subscriptionEntities) ->
+                .subscribe((Boolean isEmpty) -> updateSubscribeButton(!isEmpty), onError));
-                        updateSubscribeButton(!subscriptionEntities.isEmpty()), onError));
 
+        disposables.add(observable
+                .map(List::isEmpty)
+                .filter(x -> NotificationHelper.isNewStreamsNotificationsEnabled(requireContext()))
+                .distinctUntilChanged()
+                .skip(1)
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(isEmpty -> {
+                    if (!isEmpty) {
+                        showNotifySnackbar();
+                    }
+                }, onError));
     }
 
     private Function<Object, Object> mapOnSubscribe(final SubscriptionEntity subscription,
@@ -326,6 +344,7 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
                         info.getAvatarUrl(),
                         info.getDescription(),
                         info.getSubscriberCount());
+                updateNotifyButton(null);
                 subscribeButtonMonitor = monitorSubscribeButton(
                         headerBinding.channelSubscribeButton, mapOnSubscribe(channel, info));
             } else {
@@ -333,6 +352,7 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
                     Log.d(TAG, "Found subscription to this channel!");
                 }
                 final SubscriptionEntity subscription = subscriptionEntities.get(0);
+                updateNotifyButton(subscription);
                 subscribeButtonMonitor = monitorSubscribeButton(
                         headerBinding.channelSubscribeButton, mapOnUnsubscribe(subscription));
             }
@@ -375,6 +395,41 @@ public class ChannelFragment extends BaseListInfoFragment<ChannelInfo>
                 AnimationType.LIGHT_SCALE_AND_ALPHA);
     }
 
+    private void updateNotifyButton(@Nullable final SubscriptionEntity subscription) {
+        if (menuNotifyButton == null) {
+            return;
+        }
+        if (subscription == null) {
+            menuNotifyButton.setVisible(false);
+        } else {
+            menuNotifyButton.setEnabled(
+                    NotificationHelper.isNewStreamsNotificationsEnabled(requireContext())
+            );
+            menuNotifyButton.setChecked(
+                    subscription.getNotificationMode() != NotificationMode.DISABLED
+            );
+            menuNotifyButton.setVisible(true);
+        }
+    }
+
+    private void setNotify(final boolean isEnabled) {
+        final int mode = isEnabled ? NotificationMode.ENABLED_DEFAULT : NotificationMode.DISABLED;
+        disposables.add(
+                subscriptionManager.updateNotificationMode(currentInfo.getServiceId(),
+                        currentInfo.getUrl(), mode)
+                        .subscribeOn(Schedulers.io())
+                        .observeOn(AndroidSchedulers.mainThread())
+                        .subscribe()
+        );
+    }
+
+    private void showNotifySnackbar() {
+        Snackbar.make(itemsList, R.string.you_successfully_subscribed, Snackbar.LENGTH_LONG)
+                .setAction(R.string.get_notified, v -> setNotify(true))
+                .setActionTextColor(Color.YELLOW)
+                .show();
+    }
+
     /*//////////////////////////////////////////////////////////////////////////
     // Load and handle
     //////////////////////////////////////////////////////////////////////////*/

app/src/main/java/org/schabi/newpipe/local/subscription/SubscriptionManager.kt

@@ -7,6 +7,8 @@ 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.stream.model.StreamEntity
+import org.schabi.newpipe.database.subscription.NotificationMode
 import org.schabi.newpipe.database.subscription.SubscriptionDAO
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
 import org.schabi.newpipe.extractor.ListInfo
@@ -14,6 +16,7 @@ import org.schabi.newpipe.extractor.channel.ChannelInfo
 import org.schabi.newpipe.extractor.feed.FeedInfo
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
 import org.schabi.newpipe.local.feed.FeedDatabaseManager
+import org.schabi.newpipe.util.ExtractorHelper
 
 class SubscriptionManager(context: Context) {
     private val database = NewPipeDatabase.getInstance(context)
@@ -66,6 +69,16 @@ class SubscriptionManager(context: Context) {
             }
         }
 
+    fun updateNotificationMode(serviceId: Int, url: String?, @NotificationMode mode: Int): Completable {
+        return subscriptionTable().getSubscription(serviceId, url!!)
+                .flatMapCompletable { entity: SubscriptionEntity ->
+                    Completable.fromAction {
+                        entity.notificationMode = mode
+                        subscriptionTable().update(entity)
+                    }.andThen(rememberLastStream(entity))
+                }
+    }
+
     fun updateFromInfo(subscriptionId: Long, info: ListInfo<StreamInfoItem>) {
         val subscriptionEntity = subscriptionTable.getSubscription(subscriptionId)
 
@@ -94,4 +107,14 @@ class SubscriptionManager(context: Context) {
     fun deleteSubscription(subscriptionEntity: SubscriptionEntity) {
         subscriptionTable.delete(subscriptionEntity)
     }
+
+    private fun rememberLastStream(subscription: SubscriptionEntity): Completable {
+        return ExtractorHelper.getChannelInfo(subscription.serviceId, subscription.url, false)
+                .map { channel -> channel.relatedItems.map { stream -> StreamEntity(stream) } }
+                .flatMapCompletable { entities ->
+                    Completable.fromAction {
+                        database.streamDAO().upsertAll(entities)
+                    }
+                }.onErrorComplete()
+    }
 }

app/src/main/java/org/schabi/newpipe/notifications/ChannelUpdates.kt

@@ -0,0 +1,46 @@
+package org.schabi.newpipe.notifications
+
+import android.content.Context
+import android.content.Intent
+import org.schabi.newpipe.R
+import org.schabi.newpipe.extractor.channel.ChannelInfo
+import org.schabi.newpipe.extractor.stream.StreamInfoItem
+import org.schabi.newpipe.util.NavigationHelper
+
+data class ChannelUpdates(
+    val serviceId: Int,
+    val url: String,
+    val avatarUrl: String,
+    val name: String,
+    val streams: List<StreamInfoItem>
+) {
+
+    val id = url.hashCode()
+
+    val isNotEmpty: Boolean
+        get() = streams.isNotEmpty()
+
+    val size = streams.size
+
+    fun getText(context: Context): String {
+        val separator = context.resources.getString(R.string.enumeration_comma) + " "
+        return streams.joinToString(separator) { it.name }
+    }
+
+    fun createOpenChannelIntent(context: Context?): Intent {
+        return NavigationHelper.getChannelIntent(context, serviceId, url)
+            .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+    }
+
+    companion object {
+        fun from(channel: ChannelInfo, streams: List<StreamInfoItem>): ChannelUpdates {
+            return ChannelUpdates(
+                channel.serviceId,
+                channel.url,
+                channel.avatarUrl,
+                channel.name,
+                streams
+            )
+        }
+    }
+}

app/src/main/java/org/schabi/newpipe/notifications/NotificationHelper.java

@@ -0,0 +1,137 @@
+package org.schabi.newpipe.notifications;
+
+import android.app.NotificationChannel;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+import android.os.Build;
+import android.provider.Settings;
+
+import androidx.annotation.NonNull;
+import androidx.core.app.NotificationCompat;
+import androidx.core.app.NotificationManagerCompat;
+import androidx.core.content.ContextCompat;
+import androidx.preference.PreferenceManager;
+
+import org.schabi.newpipe.BuildConfig;
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.core.Single;
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+import io.reactivex.rxjava3.schedulers.Schedulers;
+
+public final class NotificationHelper {
+
+    private final Context context;
+    private final NotificationManager manager;
+    private final CompositeDisposable disposable;
+
+    public NotificationHelper(final Context context) {
+        this.context = context;
+        this.disposable = new CompositeDisposable();
+        this.manager = (NotificationManager) context.getSystemService(
+                Context.NOTIFICATION_SERVICE
+        );
+    }
+
+    public Context getContext() {
+        return context;
+    }
+
+    /**
+     * Check whether notifications are not disabled by user via system settings.
+     *
+     * @param context Context
+     * @return true if notifications are allowed, false otherwise
+     */
+    public static boolean isNotificationsEnabledNative(final Context context) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            final String channelId = context.getString(R.string.streams_notification_channel_id);
+            final NotificationManager manager = (NotificationManager) context
+                    .getSystemService(Context.NOTIFICATION_SERVICE);
+            if (manager != null) {
+                final NotificationChannel channel = manager.getNotificationChannel(channelId);
+                return channel != null
+                        && channel.getImportance() != NotificationManager.IMPORTANCE_NONE;
+            } else {
+                return false;
+            }
+        } else {
+            return NotificationManagerCompat.from(context).areNotificationsEnabled();
+        }
+    }
+
+    public static boolean isNewStreamsNotificationsEnabled(@NonNull final Context context) {
+        return PreferenceManager.getDefaultSharedPreferences(context)
+                .getBoolean(context.getString(R.string.enable_streams_notifications), false)
+                && isNotificationsEnabledNative(context);
+    }
+
+    public static void openNativeSettingsScreen(final Context context) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            final String channelId = context.getString(R.string.streams_notification_channel_id);
+            final Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS)
+                    .putExtra(Settings.EXTRA_APP_PACKAGE, context.getPackageName())
+                    .putExtra(Settings.EXTRA_CHANNEL_ID, channelId);
+            context.startActivity(intent);
+        } else {
+            final Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
+            intent.setData(Uri.parse("package:" + context.getPackageName()));
+            context.startActivity(intent);
+        }
+    }
+
+    public void notify(final ChannelUpdates data) {
+        final String summary = context.getResources().getQuantityString(
+                R.plurals.new_streams, data.getSize(), data.getSize()
+        );
+        final NotificationCompat.Builder builder = new NotificationCompat.Builder(context,
+                context.getString(R.string.streams_notification_channel_id))
+                .setContentTitle(
+                        context.getString(R.string.notification_title_pattern,
+                                data.getName(),
+                                summary)
+                )
+                .setContentText(data.getText(context))
+                .setNumber(data.getSize())
+                .setBadgeIconType(NotificationCompat.BADGE_ICON_LARGE)
+                .setPriority(NotificationCompat.PRIORITY_DEFAULT)
+                .setSmallIcon(R.drawable.ic_stat_newpipe)
+                .setLargeIcon(BitmapFactory.decodeResource(context.getResources(),
+                        R.drawable.ic_newpipe_triangle_white))
+                .setColor(ContextCompat.getColor(context, R.color.ic_launcher_background))
+                .setColorized(true)
+                .setAutoCancel(true)
+                .setCategory(NotificationCompat.CATEGORY_SOCIAL);
+        final NotificationCompat.InboxStyle style = new NotificationCompat.InboxStyle();
+        for (final StreamInfoItem stream : data.getStreams()) {
+            style.addLine(stream.getName());
+        }
+        style.setSummaryText(summary);
+        style.setBigContentTitle(data.getName());
+        builder.setStyle(style);
+        builder.setContentIntent(PendingIntent.getActivity(
+                context,
+                data.getId(),
+                data.createOpenChannelIntent(context),
+                0
+        ));
+
+        disposable.add(
+                Single.create(new NotificationIcon(context, data.getAvatarUrl()))
+                        .subscribeOn(Schedulers.io())
+                        .observeOn(AndroidSchedulers.mainThread())
+                        .doAfterTerminate(() -> manager.notify(data.getId(), builder.build()))
+                        .subscribe(builder::setLargeIcon, throwable -> {
+                            if (BuildConfig.DEBUG) {
+                                throwable.printStackTrace();
+                            }
+                        })
+        );
+    }
+}

app/src/main/java/org/schabi/newpipe/notifications/NotificationIcon.java

@@ -0,0 +1,60 @@
+package org.schabi.newpipe.notifications;
+
+import android.app.ActivityManager;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.view.View;
+
+import com.nostra13.universalimageloader.core.ImageLoader;
+import com.nostra13.universalimageloader.core.assist.FailReason;
+import com.nostra13.universalimageloader.core.assist.ImageSize;
+import com.nostra13.universalimageloader.core.listener.SimpleImageLoadingListener;
+
+import io.reactivex.rxjava3.annotations.NonNull;
+import io.reactivex.rxjava3.core.SingleEmitter;
+import io.reactivex.rxjava3.core.SingleOnSubscribe;
+
+final class NotificationIcon implements SingleOnSubscribe<Bitmap> {
+
+    private final String url;
+    private final int size;
+
+    NotificationIcon(final Context context, final String url) {
+        this.url = url;
+        this.size = getIconSize(context);
+    }
+
+    @Override
+    public void subscribe(@NonNull final SingleEmitter<Bitmap> emitter) throws Throwable {
+        ImageLoader.getInstance().loadImage(
+                url,
+                new ImageSize(size, size),
+                new SimpleImageLoadingListener() {
+
+                    @Override
+                    public void onLoadingFailed(final String imageUri,
+                                                final View view,
+                                                final FailReason failReason) {
+                        emitter.onError(failReason.getCause());
+                    }
+
+                    @Override
+                    public void onLoadingComplete(final String imageUri,
+                                                  final View view,
+                                                  final Bitmap loadedImage) {
+                        emitter.onSuccess(loadedImage);
+                    }
+                }
+        );
+    }
+
+    private static int getIconSize(final Context context) {
+        final ActivityManager activityManager = (ActivityManager) context.getSystemService(
+                Context.ACTIVITY_SERVICE
+        );
+        final int size2 = activityManager != null ? activityManager.getLauncherLargeIconSize() : 0;
+        final int size1 = context.getResources()
+                .getDimensionPixelSize(android.R.dimen.app_icon_size);
+        return Math.max(size2, size1);
+    }
+}

app/src/main/java/org/schabi/newpipe/notifications/NotificationWorker.kt

@@ -0,0 +1,82 @@
+package org.schabi.newpipe.notifications
+
+import android.content.Context
+import androidx.preference.PreferenceManager
+import androidx.work.BackoffPolicy
+import androidx.work.Constraints
+import androidx.work.ExistingPeriodicWorkPolicy
+import androidx.work.NetworkType
+import androidx.work.PeriodicWorkRequest
+import androidx.work.RxWorker
+import androidx.work.WorkManager
+import androidx.work.WorkerParameters
+import io.reactivex.BackpressureStrategy
+import io.reactivex.Flowable
+import io.reactivex.Single
+import org.schabi.newpipe.R
+import java.util.concurrent.TimeUnit
+
+class NotificationWorker(
+    appContext: Context,
+    workerParams: WorkerParameters
+) : RxWorker(appContext, workerParams) {
+
+    private val notificationHelper by lazy {
+        NotificationHelper(appContext)
+    }
+
+    override fun createWork() = if (isEnabled(applicationContext)) {
+        Flowable.create(
+            SubscriptionUpdates(applicationContext),
+            BackpressureStrategy.BUFFER
+        ).doOnNext { notificationHelper.notify(it) }
+            .toList()
+            .map { Result.success() }
+            .onErrorReturnItem(Result.failure())
+    } else Single.just(Result.success())
+
+    companion object {
+
+        private const val TAG = "notifications"
+
+        private fun isEnabled(context: Context): Boolean {
+            return PreferenceManager.getDefaultSharedPreferences(context)
+                .getBoolean(
+                    context.getString(R.string.enable_streams_notifications),
+                    false
+                ) && NotificationHelper.isNotificationsEnabledNative(context)
+        }
+
+        fun schedule(context: Context, options: ScheduleOptions, force: Boolean = false) {
+            val constraints = Constraints.Builder()
+                .setRequiredNetworkType(
+                    if (options.isRequireNonMeteredNetwork) {
+                        NetworkType.UNMETERED
+                    } else {
+                        NetworkType.CONNECTED
+                    }
+                ).build()
+            val request = PeriodicWorkRequest.Builder(
+                NotificationWorker::class.java,
+                options.interval,
+                TimeUnit.MILLISECONDS
+            ).setConstraints(constraints)
+                .addTag(TAG)
+                .setBackoffCriteria(BackoffPolicy.LINEAR, 30, TimeUnit.MINUTES)
+                .build()
+            WorkManager.getInstance(context)
+                .enqueueUniquePeriodicWork(
+                    TAG,
+                    if (force) {
+                        ExistingPeriodicWorkPolicy.REPLACE
+                    } else {
+                        ExistingPeriodicWorkPolicy.KEEP
+                    },
+                    request
+                )
+        }
+
+        @JvmStatic
+        fun schedule(context: Context) = schedule(context, ScheduleOptions.from(context))
+    }
+}

app/src/main/java/org/schabi/newpipe/notifications/ScheduleOptions.kt

@@ -0,0 +1,33 @@
+package org.schabi.newpipe.notifications
+
+import android.content.Context
+import androidx.preference.PreferenceManager
+import org.schabi.newpipe.R
+import java.util.concurrent.TimeUnit
+
+data class ScheduleOptions(
+    val interval: Long,
+    val isRequireNonMeteredNetwork: Boolean
+) {
+
+    companion object {
+
+        fun from(context: Context): ScheduleOptions {
+            val preferences = PreferenceManager.getDefaultSharedPreferences(context)
+            return ScheduleOptions(
+                interval = TimeUnit.HOURS.toMillis(
+                    preferences.getString(
+                        context.getString(R.string.streams_notifications_interval_key),
+                        context.getString(R.string.streams_notifications_interval_default)
+                    )?.toLongOrNull() ?: context.getString(
+                        R.string.streams_notifications_interval_default
+                    ).toLong()
+                ),
+                isRequireNonMeteredNetwork = preferences.getString(
+                    context.getString(R.string.streams_notifications_network_key),
+                    context.getString(R.string.streams_notifications_network_default)
+                ) == context.getString(R.string.streams_notifications_network_wifi)
+            )
+        }
+    }
+}

app/src/main/java/org/schabi/newpipe/notifications/SubscriptionUpdates.kt

@@ -0,0 +1,53 @@
+package org.schabi.newpipe.notifications
+
+import android.content.Context
+import io.reactivex.FlowableEmitter
+import io.reactivex.FlowableOnSubscribe
+import org.schabi.newpipe.NewPipeDatabase
+import org.schabi.newpipe.database.stream.model.StreamEntity
+import org.schabi.newpipe.database.subscription.NotificationMode
+import org.schabi.newpipe.extractor.stream.StreamInfoItem
+import org.schabi.newpipe.local.subscription.SubscriptionManager
+import org.schabi.newpipe.util.ExtractorHelper
+
+class SubscriptionUpdates(context: Context) : FlowableOnSubscribe<ChannelUpdates?> {
+
+    private val subscriptionManager = SubscriptionManager(context)
+    private val streamTable = NewPipeDatabase.getInstance(context).streamDAO()
+
+    override fun subscribe(emitter: FlowableEmitter<ChannelUpdates?>) {
+        try {
+            val subscriptions = subscriptionManager.subscriptions().blockingFirst()
+            for (subscription in subscriptions) {
+                if (subscription.notificationMode != NotificationMode.DISABLED) {
+                    val channel = ExtractorHelper.getChannelInfo(
+                        subscription.serviceId,
+                        subscription.url, true
+                    ).blockingGet()
+                    val updates = ChannelUpdates.from(channel, filterStreams(channel.relatedItems))
+                    if (updates.isNotEmpty) {
+                        emitter.onNext(updates)
+                        // prevent duplicated notifications
+                        streamTable.upsertAll(updates.streams.map { StreamEntity(it) })
+                    }
+                }
+            }
+            emitter.onComplete()
+        } catch (e: Exception) {
+            emitter.onError(e)
+        }
+    }
+
+    private fun filterStreams(list: List<*>): List<StreamInfoItem> {
+        val streams = ArrayList<StreamInfoItem>(list.size)
+        for (o in list) {
+            if (o is StreamInfoItem) {
+                if (streamTable.exists(o.serviceId.toLong(), o.url)) {
+                    break
+                }
+                streams.add(o)
+            }
+        }
+        return streams
+    }
+}

app/src/main/java/org/schabi/newpipe/settings/NotificationsSettingsFragment.kt

@@ -0,0 +1,112 @@
+package org.schabi.newpipe.settings
+
+import android.content.SharedPreferences
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener
+import android.graphics.Color
+import android.os.Bundle
+import androidx.preference.Preference
+import com.google.android.material.snackbar.Snackbar
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.disposables.Disposable
+import org.schabi.newpipe.R
+import org.schabi.newpipe.database.subscription.NotificationMode
+import org.schabi.newpipe.database.subscription.SubscriptionEntity
+import org.schabi.newpipe.error.ErrorActivity
+import org.schabi.newpipe.error.ErrorInfo
+import org.schabi.newpipe.error.UserAction
+import org.schabi.newpipe.local.subscription.SubscriptionManager
+import org.schabi.newpipe.notifications.NotificationHelper
+import org.schabi.newpipe.notifications.NotificationWorker
+import org.schabi.newpipe.notifications.ScheduleOptions
+
+class NotificationsSettingsFragment : BasePreferenceFragment(), OnSharedPreferenceChangeListener {
+
+    private var notificationWarningSnackbar: Snackbar? = null
+    private var loader: Disposable? = null
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        addPreferencesFromResource(R.xml.notifications_settings)
+    }
+
+    override fun onStart() {
+        super.onStart()
+        defaultPreferences.registerOnSharedPreferenceChangeListener(this)
+    }
+
+    override fun onStop() {
+        defaultPreferences.unregisterOnSharedPreferenceChangeListener(this)
+        super.onStop()
+    }
+
+    override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
+        val context = context ?: return
+        if (key == getString(R.string.streams_notifications_interval_key) || key == getString(R.string.streams_notifications_network_key)) {
+            NotificationWorker.schedule(context, ScheduleOptions.from(context), true)
+        }
+    }
+
+    override fun onResume() {
+        super.onResume()
+        val enabled = NotificationHelper.isNotificationsEnabledNative(context)
+        preferenceScreen.isEnabled = enabled
+        if (!enabled) {
+            if (notificationWarningSnackbar == null) {
+                notificationWarningSnackbar = Snackbar.make(
+                    listView,
+                    R.string.notifications_disabled,
+                    Snackbar.LENGTH_INDEFINITE
+                ).apply {
+                    setAction(R.string.settings) { v ->
+                        NotificationHelper.openNativeSettingsScreen(v.context)
+                    }
+                    setActionTextColor(Color.YELLOW)
+                    addCallback(object : Snackbar.Callback() {
+                        override fun onDismissed(transientBottomBar: Snackbar, event: Int) {
+                            super.onDismissed(transientBottomBar, event)
+                            notificationWarningSnackbar = null
+                        }
+                    })
+                    show()
+                }
+            }
+        } else {
+            notificationWarningSnackbar?.dismiss()
+            notificationWarningSnackbar = null
+        }
+        loader?.dispose()
+        loader = SubscriptionManager(requireContext())
+            .subscriptions()
+            .observeOn(AndroidSchedulers.mainThread())
+            .subscribe(this::updateSubscriptions, this::onError)
+    }
+
+    override fun onPause() {
+        loader?.dispose()
+        loader = null
+        super.onPause()
+    }
+
+    private fun updateSubscriptions(subscriptions: List<SubscriptionEntity>) {
+        var notified = 0
+        for (subscription in subscriptions) {
+            if (subscription.notificationMode != NotificationMode.DISABLED) {
+                notified++
+            }
+        }
+        val preference = findPreference<Preference>(getString(R.string.streams_notifications_channels_key))
+        if (preference != null) {
+            preference.summary = preference.context.getString(
+                R.string.streams_notifications_channels_summary,
+                notified,
+                subscriptions.size
+            )
+        }
+    }
+
+    private fun onError(e: Throwable) {
+        ErrorActivity.reportErrorInSnackbar(
+            this,
+            ErrorInfo(e, UserAction.SUBSCRIPTION_GET, "Get subscriptions list")
+        )
+    }
+}

app/src/main/java/org/schabi/newpipe/settings/notifications/NotificationsChannelsConfigFragment.java

@@ -0,0 +1,84 @@
+package org.schabi.newpipe.settings.notifications;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+import androidx.recyclerview.widget.RecyclerView;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.database.subscription.NotificationMode;
+import org.schabi.newpipe.local.subscription.SubscriptionManager;
+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;
+
+public final class NotificationsChannelsConfigFragment extends Fragment
+        implements NotificationsConfigAdapter.ModeToggleListener {
+
+    private NotificationsConfigAdapter adapter;
+    @Nullable
+    private Disposable loader = null;
+    private CompositeDisposable updaters;
+
+    @Override
+    public void onCreate(@Nullable final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        adapter = new NotificationsConfigAdapter(this);
+        updaters = new CompositeDisposable();
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(@NonNull final LayoutInflater inflater,
+                             @Nullable final ViewGroup container,
+                             @Nullable final Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_channels_notifications, container, false);
+    }
+
+    @Override
+    public void onViewCreated(@NonNull final View view, @Nullable final Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+
+        final RecyclerView recyclerView = view.findViewById(R.id.recycler_view);
+        recyclerView.setAdapter(adapter);
+    }
+
+    @Override
+    public void onActivityCreated(@Nullable final Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+        if (loader != null) {
+            loader.dispose();
+        }
+        loader = new SubscriptionManager(requireContext())
+                .subscriptions()
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(adapter::update);
+    }
+
+    @Override
+    public void onDestroy() {
+        if (loader != null) {
+            loader.dispose();
+        }
+        updaters.dispose();
+        super.onDestroy();
+    }
+
+    @Override
+    public void onModeToggle(final int position, @NotificationMode final int mode) {
+        final NotificationsConfigAdapter.SubscriptionItem subscription = adapter.getItem(position);
+        updaters.add(
+                new SubscriptionManager(requireContext())
+                        .updateNotificationMode(subscription.getServiceId(),
+                                subscription.getUrl(), mode)
+                        .subscribeOn(Schedulers.io())
+                        .subscribe()
+        );
+    }
+}

app/src/main/java/org/schabi/newpipe/settings/notifications/NotificationsConfigAdapter.kt

@@ -0,0 +1,114 @@
+package org.schabi.newpipe.settings.notifications
+
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.CheckedTextView
+import androidx.recyclerview.widget.AsyncListDiffer
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import org.schabi.newpipe.R
+import org.schabi.newpipe.database.subscription.NotificationMode
+import org.schabi.newpipe.database.subscription.SubscriptionEntity
+import org.schabi.newpipe.settings.notifications.NotificationsConfigAdapter.SubscriptionHolder
+
+class NotificationsConfigAdapter(
+    private val listener: ModeToggleListener
+) : RecyclerView.Adapter<SubscriptionHolder>() {
+
+    private val differ = AsyncListDiffer(this, DiffCallback())
+
+    init {
+        setHasStableIds(true)
+    }
+
+    override fun onCreateViewHolder(viewGroup: ViewGroup, i: Int): SubscriptionHolder {
+        val view = LayoutInflater.from(viewGroup.context)
+            .inflate(R.layout.item_notification_config, viewGroup, false)
+        return SubscriptionHolder(view, listener)
+    }
+
+    override fun onBindViewHolder(subscriptionHolder: SubscriptionHolder, i: Int) {
+        subscriptionHolder.bind(differ.currentList[i])
+    }
+
+    fun getItem(position: Int): SubscriptionItem = differ.currentList[position]
+
+    override fun getItemCount() = differ.currentList.size
+
+    override fun getItemId(position: Int): Long {
+        return differ.currentList[position].id
+    }
+
+    fun update(newData: List<SubscriptionEntity>) {
+        differ.submitList(
+            newData.map {
+                SubscriptionItem(
+                    id = it.uid,
+                    title = it.name,
+                    notificationMode = it.notificationMode,
+                    serviceId = it.serviceId,
+                    url = it.url
+                )
+            }
+        )
+    }
+
+    data class SubscriptionItem(
+        val id: Long,
+        val title: String,
+        @NotificationMode
+        val notificationMode: Int,
+        val serviceId: Int,
+        val url: String
+    )
+
+    class SubscriptionHolder(
+        itemView: View,
+        private val listener: ModeToggleListener
+    ) : RecyclerView.ViewHolder(itemView), View.OnClickListener {
+
+        private val checkedTextView = itemView as CheckedTextView
+
+        init {
+            itemView.setOnClickListener(this)
+        }
+
+        fun bind(data: SubscriptionItem) {
+            checkedTextView.text = data.title
+            checkedTextView.isChecked = data.notificationMode != NotificationMode.DISABLED
+        }
+
+        override fun onClick(v: View) {
+            val mode = if (checkedTextView.isChecked) {
+                NotificationMode.DISABLED
+            } else {
+                NotificationMode.ENABLED_DEFAULT
+            }
+            listener.onModeToggle(adapterPosition, mode)
+        }
+    }
+
+    private class DiffCallback : DiffUtil.ItemCallback<SubscriptionItem>() {
+
+        override fun areItemsTheSame(oldItem: SubscriptionItem, newItem: SubscriptionItem): Boolean {
+            return oldItem.id == newItem.id
+        }
+
+        override fun areContentsTheSame(oldItem: SubscriptionItem, newItem: SubscriptionItem): Boolean {
+            return oldItem == newItem
+        }
+
+        override fun getChangePayload(oldItem: SubscriptionItem, newItem: SubscriptionItem): Any? {
+            if (oldItem.notificationMode != newItem.notificationMode) {
+                return newItem.notificationMode
+            } else {
+                return super.getChangePayload(oldItem, newItem)
+            }
+        }
+    }
+
+    interface ModeToggleListener {
+        fun onModeToggle(position: Int, @NotificationMode mode: Int)
+    }
+}

app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java

@@ -571,6 +571,12 @@ public final class NavigationHelper {
         return getOpenIntent(context, url, service.getServiceId(), linkType);
     }
 
+    public static Intent getChannelIntent(final Context context,
+                                          final int serviceId,
+                                          final String url) {
+        return getOpenIntent(context, url, serviceId, StreamingService.LinkType.CHANNEL);
+    }
+
     /**
      * Start an activity to install Kore.
      *

app/src/main/res/drawable-anydpi-v24/ic_stat_newpipe.xml

@@ -0,0 +1,14 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="98.91304"
+    android:viewportHeight="98.91304"
+    android:tint="#FFFFFF">
+  <group android:translateX="-6.7255435"
+      android:translateY="-0.54347825">
+    <path
+        android:pathData="m23.909,10.211v78.869c0,0 7.7,-4.556 12.4,-7.337V67.477,56.739 31.686c0,0 3.707,2.173 8.948,5.24 6.263,3.579 14.57,8.565 21.473,12.655 -9.358,5.483 -16.8,9.876 -22.496,13.234V77.053C57.974,68.927 75.176,58.762 90.762,49.581 75.551,40.634 57.144,29.768 43.467,21.715 31.963,14.94 23.909,10.211 23.909,10.211Z"
+        android:strokeWidth="1.2782383"
+        android:fillColor="#ffffff"/>
+  </group>
+</vector>

app/src/main/res/drawable-night/ic_notifications.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M12,22c1.1,0 2,-0.9 2,-2h-4c0,1.1 0.89,2 2,2zM18,16v-5c0,-3.07 -1.64,-5.64 -4.5,-6.32L13.5,4c0,-0.83 -0.67,-1.5 -1.5,-1.5s-1.5,0.67 -1.5,1.5v0.68C7.63,5.36 6,7.92 6,11v5l-2,2v1h16v-1l-2,-2z" />
+</vector>

app/src/main/res/drawable/ic_notifications.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,22c1.1,0 2,-0.9 2,-2h-4c0,1.1 0.89,2 2,2zM18,16v-5c0,-3.07 -1.64,-5.64 -4.5,-6.32L13.5,4c0,-0.83 -0.67,-1.5 -1.5,-1.5s-1.5,0.67 -1.5,1.5v0.68C7.63,5.36 6,7.92 6,11v5l-2,2v1h16v-1l-2,-2z" />
+</vector>

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

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/recycler_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scrollbars="vertical"
+        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
+    
+</FrameLayout>

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

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="?listPreferredItemHeightSmall"
+    android:background="?selectableItemBackground"
+    android:ellipsize="end"
+    android:gravity="center_vertical"
+    android:maxLines="2"
+    android:orientation="horizontal"
+    android:paddingStart="?listPreferredItemPaddingStart"
+    android:paddingEnd="?listPreferredItemPaddingEnd"
+    android:textAppearance="@style/TextAppearance.AppCompat.Body1"
+    android:drawableEnd="?android:listChoiceIndicatorMultiple"
+    tools:text="@tools:sample/lorem[4]" />

app/src/main/res/menu/menu_channel.xml

@@ -17,6 +17,13 @@
         android:title="@string/share"
         app:showAsAction="ifRoom" />
 
+    <item
+        android:id="@+id/menu_item_notify"
+        android:checkable="true"
+        android:visible="false"
+        android:title="@string/get_notified"
+        app:showAsAction="never" />
+
     <item
         android:id="@+id/action_settings"
         android:orderInCategory="1"

app/src/main/res/values-ru/strings.xml

@@ -169,6 +169,11 @@
         <item quantity="many">%s видео</item>
         <item quantity="other">%s видео</item>
     </plurals>
+    <plurals name="new_streams">
+        <item quantity="one">%s новое видео</item>
+        <item quantity="few">%s новых видео</item>
+        <item quantity="many">%s новых видео</item>
+    </plurals>
     <string name="delete_item_search_history">Удалить этот элемент из истории поиска?</string>
     <string name="main_page_content">Главная страница</string>
     <string name="blank_page_summary">Пустая страница</string>
@@ -683,4 +688,20 @@
     <string name="main_page_content_swipe_remove">Удалять элементы смахиванием</string>
     <string name="start_main_player_fullscreen_summary">Не начинать просмотр видео в мини-плеере, но сразу переключиться в полноэкранный режим, если автовращение экрана заблокировано. Вы можете переключиться на мини-плеер, выйдя из полноэкранного режима.</string>
     <string name="start_main_player_fullscreen_title">Начинать просмотр в полноэкранном режиме</string>
+    <string name="notifications">Уведомления</string>
+    <string name="streams_notification_channel_name">Новые видео</string>
+    <string name="streams_notification_channel_description">Уведомления о новых видео в подписках</string>
+    <string name="streams_notifications_interval_title">Частота проверки</string>
+    <string name="enable_streams_notifications_title">Уведомлять о новых видео</string>
+    <string name="enable_streams_notifications_summary">Получать уведомления о новых видео из каналов, на которые Вы подписаны</string>
+    <string name="every_hour">Каждый час</string>
+    <string name="every_two_hours">Каждые 2 часа</string>
+    <string name="every_three_hours">Каждые 3 часа</string>
+    <string name="twice_per_day">Дважды в день</string>
+    <string name="every_day">Каждый день</string>
+    <string name="streams_notifications_network_title">Тип подключения</string>
+    <string name="any_network">Любая сеть</string>
+    <string name="notifications_disabled">Уведомления отключены</string>
+    <string name="get_notified">Уведомлять</string>
+    <string name="you_successfully_subscribed">Вы подписались на канал</string>
 </resources>

app/src/main/res/values-zh-rCN/strings.xml

@@ -443,4 +443,5 @@
     <string name="seek_duration_title">快进 / 快退的单位时间</string>
     <string name="clear_download_history">清除下载历史记录</string>
     <string name="delete_downloaded_files">删除下载了的文件</string>
+    <string name="enumeration_comma">、</string>
 </resources>

app/src/main/res/values-zh-rHK/strings.xml

@@ -132,4 +132,5 @@
     <string name="use_inexact_seek_title">使用粗略快查</string>
     <string name="controls_add_to_playlist_title">添加到</string>
     <string name="tab_choose">選擇標籤</string>
+    <string name="enumeration_comma">、</string>
 </resources>

app/src/main/res/values/settings_keys.xml

@@ -1260,4 +1260,34 @@
     </string-array>
 
     <string name="recaptcha_cookies_key" translatable="false">recaptcha_cookies_key</string>
+    <string name="enable_streams_notifications" translatable="false">enable_streams_notifications</string>
+    <string name="streams_notifications_interval_key" translatable="false">streams_notifications_interval</string>
+    <string name="streams_notifications_interval_default" translatable="false">3</string>
+    <string-array name="streams_notifications_interval_values">
+        <item>1</item>
+        <item>2</item>
+        <item>3</item>
+        <item>12</item>
+        <item>24</item>
+    </string-array>
+    <string-array name="streams_notifications_interval_description">
+        <item>@string/every_hour</item>
+        <item>@string/every_two_hours</item>
+        <item>@string/every_three_hours</item>
+        <item>@string/twice_per_day</item>
+        <item>@string/every_day</item>
+    </string-array>
+    <string name="streams_notifications_network_key" translatable="false">streams_notifications_network</string>
+    <string name="streams_notifications_network_any" translatable="false">any</string>
+    <string name="streams_notifications_network_wifi" translatable="false">wifi</string>
+    <string name="streams_notifications_network_default" translatable="false">@string/streams_notifications_network_wifi</string>
+    <string-array name="streams_notifications_network_values">
+        <item>@string/streams_notifications_network_any</item>
+        <item>@string/streams_notifications_network_wifi</item>
+    </string-array>
+    <string-array name="streams_notifications_network_description">
+        <item>@string/any_network</item>
+        <item>@string/wifi_only</item>
+    </string-array>
+    <string name="streams_notifications_channels_key" translatable="false">streams_notifications_channels</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <resources xmlns:tools="http://schemas.android.com/tools"
         tools:ignore="MissingTranslation">
 
@@ -180,6 +180,7 @@
     <string name="always">Always</string>
     <string name="just_once">Just Once</string>
     <string name="file">File</string>
+    <string name="notifications">Notifications</string>
     <string name="notification_channel_id" translatable="false">newpipe</string>
     <string name="notification_channel_name">NewPipe Notification</string>
     <string name="notification_channel_description">Notifications for NewPipe background and popup players</string>
@@ -189,6 +190,9 @@
     <string name="hash_channel_id" translatable="false">newpipeHash</string>
     <string name="hash_channel_name">Video Hash Notification</string>
     <string name="hash_channel_description">Notifications for video hashing progress</string>
+    <string name="streams_notification_channel_id" translatable="false">newpipeNewStreams</string>
+    <string name="streams_notification_channel_name">New streams</string>
+    <string name="streams_notification_channel_description">Notifications about new streams for subscriptions</string>
     <string name="unknown_content">[Unknown]</string>
     <string name="switch_to_background">Switch to Background</string>
     <string name="switch_to_popup">Switch to Popup</string>
@@ -309,6 +313,10 @@
     </plurals>
     <string name="no_comments">No comments</string>
     <string name="comments_are_disabled">Comments are disabled</string>
+    <plurals name="new_streams">
+        <item quantity="one">%s new stream</item>
+        <item quantity="other">%s new streams</item>
+    </plurals>
     <!-- Missions -->
     <string name="start">Start</string>
     <string name="pause">Pause</string>
@@ -513,6 +521,17 @@
         <item>240p</item>
         <item>144p</item>
     </string-array>
+    <!-- Notifications settings -->
+    <string name="enable_streams_notifications_title">New streams notifications</string>
+    <string name="enable_streams_notifications_summary">Notify about new streams from subscriptions</string>
+    <string name="streams_notifications_interval_title">Checking frequency</string>
+    <string name="every_hour">Every hour</string>
+    <string name="every_two_hours">Every 2 hours</string>
+    <string name="every_three_hours">Every 3 hours</string>
+    <string name="twice_per_day">Twice per day</string>
+    <string name="every_day">Every day</string>
+    <string name="streams_notifications_network_title">Required network connection</string>
+    <string name="any_network">Any network</string>
     <!-- Updates Settings -->
     <string name="updates_setting_title">Updates</string>
     <string name="updates_setting_description">Show a notification to prompt app update when a new version is available</string>
@@ -703,4 +722,10 @@
     <!-- Show Channel Details -->
     <string name="error_show_channel_details">Error at Show Channel Details</string>
     <string name="loading_channel_details">Loading Channel Details…</string>
+    <string name="notifications_disabled">Notifications are disabled</string>
+    <string name="get_notified">Get notified</string>
+    <string name="you_successfully_subscribed">You now subscribed to this channel</string>
+    <string name="enumeration_comma">,</string>
+    <string name="notification_title_pattern" translatable="false">%s • %s</string>
+    <string name="streams_notifications_channels_summary" translatable="false">%d/%d</string>
 </resources>

app/src/main/res/xml/notifications_settings.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:key="general_preferences"
+	android:title="@string/notifications">
+
+	<SwitchPreference
+		android:defaultValue="false"
+		android:key="@string/enable_streams_notifications"
+		android:summary="@string/enable_streams_notifications_summary"
+		android:title="@string/enable_streams_notifications_title"
+		app:iconSpaceReserved="false" />
+
+	<ListPreference
+		android:defaultValue="@string/streams_notifications_interval_default"
+		android:dependency="@string/enable_streams_notifications"
+		android:entries="@array/streams_notifications_interval_description"
+		android:entryValues="@array/streams_notifications_interval_values"
+		android:key="@string/streams_notifications_interval_key"
+		android:summary="%s"
+		android:title="@string/streams_notifications_interval_title"
+		app:iconSpaceReserved="false" />
+
+	<ListPreference
+		android:defaultValue="@string/streams_notifications_network_default"
+		android:dependency="@string/enable_streams_notifications"
+		android:entries="@array/streams_notifications_network_description"
+		android:entryValues="@array/streams_notifications_network_values"
+		android:key="@string/streams_notifications_network_key"
+		android:summary="%s"
+		android:title="@string/streams_notifications_network_title"
+		app:iconSpaceReserved="false" />
+
+	<Preference
+		android:fragment="org.schabi.newpipe.settings.notifications.NotificationsChannelsConfigFragment"
+		android:dependency="@string/enable_streams_notifications"
+		android:key="@string/streams_notifications_channels_key"
+		android:title="@string/channels"
+		app:iconSpaceReserved="false" />
+
+</PreferenceScreen>

app/src/release/res/xml/main_settings.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+<PreferenceScreen
+    xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:key="general_preferences"
     android:title="@string/settings">
@@ -40,6 +41,12 @@
         android:title="@string/settings_category_notification_title"
         app:iconSpaceReserved="false" />
 
+    <PreferenceScreen
+        android:fragment="org.schabi.newpipe.settings.NotificationsSettingsFragment"
+        android:icon="@drawable/ic_notifications"
+        android:title="@string/notifications"
+        app:iconSpaceReserved="false" />
+
     <PreferenceScreen
         android:fragment="org.schabi.newpipe.settings.UpdateSettingsFragment"
         android:icon="@drawable/ic_cloud_download"