Merge pull request #9182 from Theta-Dev/channel-tabs

Add support for channel tabs

app/build.gradle

@@ -197,7 +197,7 @@ dependencies {
     // name and the commit hash with the commit hash of the (pushed) commit you want to test
     // This works thanks to JitPack: https://jitpack.io/
     implementation 'com.github.TeamNewPipe:nanojson:1d9e1aea9049fc9f85e68b43ba39fe7be1c1f751'
-    implementation 'com.github.TeamNewPipe:NewPipeExtractor:340095515d45ecbee576872c7198992ebd8e4f08'
+    implementation 'com.github.TeamNewPipe:NewPipeExtractor:95a3cc0a173bba28c179f9f9503b1010ec6bff21'
     implementation 'com.github.TeamNewPipe:NoNonsense-FilePicker:5.0.0'
 
 /** Checkstyle **/

app/src/androidTest/java/org/schabi/newpipe/local/subscription/SubscriptionManagerTest.java

@@ -10,19 +10,13 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.schabi.newpipe.database.AppDatabase;
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity;
-import org.schabi.newpipe.database.stream.model.StreamEntity;
 import org.schabi.newpipe.database.subscription.SubscriptionEntity;
 import org.schabi.newpipe.extractor.channel.ChannelInfo;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.localization.DateWrapper;
-import org.schabi.newpipe.extractor.stream.StreamInfoItem;
-import org.schabi.newpipe.extractor.stream.StreamType;
 import org.schabi.newpipe.testUtil.TestDatabase;
 import org.schabi.newpipe.testUtil.TrampolineSchedulerRule;
 
 import java.io.IOException;
-import java.time.OffsetDateTime;
-import java.util.Comparator;
 import java.util.List;
 
 public class SubscriptionManagerTest {
@@ -58,7 +52,7 @@ public class SubscriptionManagerTest {
         final ChannelInfo info = ChannelInfo.getInfo("https://www.youtube.com/c/3blue1brown");
         final SubscriptionEntity subscription = SubscriptionEntity.from(info);
 
-        manager.insertSubscription(subscription, info);
+        manager.insertSubscription(subscription);
         final SubscriptionEntity readSubscription = getAssertOneSubscriptionEntity();
 
         // the uid has changed, since the uid is chosen upon inserting, but the rest should match
@@ -76,7 +70,7 @@ public class SubscriptionManagerTest {
         final SubscriptionEntity subscription = SubscriptionEntity.from(info);
         subscription.setNotificationMode(0);
 
-        manager.insertSubscription(subscription, info);
+        manager.insertSubscription(subscription);
         manager.updateNotificationMode(subscription.getServiceId(), subscription.getUrl(), 1)
                 .blockingAwait();
         final SubscriptionEntity anotherSubscription = getAssertOneSubscriptionEntity();
@@ -85,35 +79,4 @@ public class SubscriptionManagerTest {
         assertEquals(subscription.getUrl(), anotherSubscription.getUrl());
         assertEquals(1, anotherSubscription.getNotificationMode());
     }
-
-    @Test
-    public void testRememberRecentStreams() throws ExtractionException, IOException {
-        final ChannelInfo info = ChannelInfo.getInfo("https://www.youtube.com/c/Polyphia");
-        final List<StreamInfoItem> relatedItems = List.of(
-                new StreamInfoItem(0, "a", "b", StreamType.VIDEO_STREAM),
-                new StreamInfoItem(1, "c", "d", StreamType.AUDIO_STREAM),
-                new StreamInfoItem(2, "e", "f", StreamType.AUDIO_LIVE_STREAM),
-                new StreamInfoItem(3, "g", "h", StreamType.LIVE_STREAM));
-        relatedItems.forEach(item -> {
-            // these two fields must be non-null for the insert to succeed
-            item.setUploaderUrl(info.getUrl());
-            item.setUploaderName(info.getName());
-            // the upload date must not be too much in the past for the item to actually be inserted
-            item.setUploadDate(new DateWrapper(OffsetDateTime.now()));
-        });
-        info.setRelatedItems(relatedItems);
-        final SubscriptionEntity subscription = SubscriptionEntity.from(info);
-
-        manager.insertSubscription(subscription, info);
-        final List<StreamEntity> streams = database.streamDAO().getAll().blockingFirst();
-
-        assertEquals(4, streams.size());
-        streams.sort(Comparator.comparing(StreamEntity::getServiceId));
-        for (int i = 0; i < 4; i++) {
-            assertEquals(relatedItems.get(0).getServiceId(), streams.get(0).getServiceId());
-            assertEquals(relatedItems.get(0).getUrl(), streams.get(0).getUrl());
-            assertEquals(relatedItems.get(0).getName(), streams.get(0).getTitle());
-            assertEquals(relatedItems.get(0).getStreamType(), streams.get(0).getStreamType());
-        }
-    }
 }

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

@@ -65,6 +65,7 @@ import org.schabi.newpipe.extractor.exceptions.PrivateContentException;
 import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
 import org.schabi.newpipe.extractor.exceptions.SoundCloudGoPlusContentException;
 import org.schabi.newpipe.extractor.exceptions.YoutubeMusicPremiumContentException;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
 import org.schabi.newpipe.extractor.playlist.PlaylistInfo;
 import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.ktx.ExceptionUtils;
@@ -72,10 +73,11 @@ import org.schabi.newpipe.local.dialog.PlaylistDialog;
 import org.schabi.newpipe.player.PlayerType;
 import org.schabi.newpipe.player.helper.PlayerHelper;
 import org.schabi.newpipe.player.helper.PlayerHolder;
-import org.schabi.newpipe.player.playqueue.ChannelPlayQueue;
+import org.schabi.newpipe.player.playqueue.ChannelTabPlayQueue;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.player.playqueue.PlaylistPlayQueue;
 import org.schabi.newpipe.player.playqueue.SinglePlayQueue;
+import org.schabi.newpipe.util.ChannelTabHelper;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.DeviceUtils;
 import org.schabi.newpipe.util.ExtractorHelper;
@@ -1022,7 +1024,16 @@ public class RouterActivity extends AppCompatActivity {
                     }
                     playQueue = new SinglePlayQueue((StreamInfo) info);
                 } else if (info instanceof ChannelInfo) {
-                    playQueue = new ChannelPlayQueue((ChannelInfo) info);
+                    final Optional<ListLinkHandler> playableTab = ((ChannelInfo) info).getTabs()
+                            .stream()
+                            .filter(ChannelTabHelper::isStreamsTab)
+                            .findFirst();
+
+                    if (playableTab.isPresent()) {
+                        playQueue = new ChannelTabPlayQueue(info.getServiceId(), playableTab.get());
+                    } else {
+                        return; // there is no playable tab
+                    }
                 } else if (info instanceof PlaylistInfo) {
                     playQueue = new PlaylistPlayQueue((PlaylistInfo) info);
                 } else {

app/src/main/java/org/schabi/newpipe/fragments/detail/BaseDescriptionFragment.java

@@ -0,0 +1,209 @@
+package org.schabi.newpipe.fragments.detail;
+
+import static android.text.TextUtils.isEmpty;
+import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
+import static org.schabi.newpipe.util.text.TextLinkifier.SET_LINK_MOVEMENT_METHOD;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.LinearLayout;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.StringRes;
+import androidx.appcompat.widget.TooltipCompat;
+import androidx.core.text.HtmlCompat;
+
+import com.google.android.material.chip.Chip;
+
+import org.schabi.newpipe.BaseFragment;
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.databinding.FragmentDescriptionBinding;
+import org.schabi.newpipe.databinding.ItemMetadataBinding;
+import org.schabi.newpipe.databinding.ItemMetadataTagsBinding;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.stream.Description;
+import org.schabi.newpipe.util.NavigationHelper;
+import org.schabi.newpipe.util.external_communication.ShareUtils;
+import org.schabi.newpipe.util.text.TextLinkifier;
+
+import java.util.List;
+
+import io.reactivex.rxjava3.disposables.CompositeDisposable;
+
+public abstract class BaseDescriptionFragment extends BaseFragment {
+    private final CompositeDisposable descriptionDisposables = new CompositeDisposable();
+    protected FragmentDescriptionBinding binding;
+
+    @Override
+    public View onCreateView(@NonNull final LayoutInflater inflater,
+                             @Nullable final ViewGroup container,
+                             @Nullable final Bundle savedInstanceState) {
+        binding = FragmentDescriptionBinding.inflate(inflater, container, false);
+        setupDescription();
+        setupMetadata(inflater, binding.detailMetadataLayout);
+        addTagsMetadataItem(inflater, binding.detailMetadataLayout);
+        return binding.getRoot();
+    }
+
+    @Override
+    public void onDestroy() {
+        descriptionDisposables.clear();
+        super.onDestroy();
+    }
+
+    /**
+     * Get the description to display.
+     * @return description object
+     */
+    @Nullable
+    protected abstract Description getDescription();
+
+    /**
+     * Get the streaming service. Used for generating description links.
+     * @return streaming service
+     */
+    @Nullable
+    protected abstract StreamingService getService();
+
+    /**
+     * Get the streaming service ID. Used for tag links.
+     * @return service ID
+     */
+    protected abstract int getServiceId();
+
+    /**
+     * Get the URL of the described video or audio, used to generate description links.
+     * @return stream URL
+     */
+    @Nullable
+    protected abstract String getStreamUrl();
+
+    /**
+     * Get the list of tags to display below the description.
+     * @return tag list
+     */
+    @Nullable
+    public abstract List<String> getTags();
+
+    /**
+     * Add additional metadata to display.
+     * @param inflater LayoutInflater
+     * @param layout detailMetadataLayout
+     */
+    protected abstract void setupMetadata(LayoutInflater inflater, LinearLayout layout);
+
+    private void setupDescription() {
+        final Description description = getDescription();
+        if (description == null || isEmpty(description.getContent())
+                || description == Description.EMPTY_DESCRIPTION) {
+            binding.detailDescriptionView.setVisibility(View.GONE);
+            binding.detailSelectDescriptionButton.setVisibility(View.GONE);
+            return;
+        }
+
+        // start with disabled state. This also loads description content (!)
+        disableDescriptionSelection();
+
+        binding.detailSelectDescriptionButton.setOnClickListener(v -> {
+            if (binding.detailDescriptionNoteView.getVisibility() == View.VISIBLE) {
+                disableDescriptionSelection();
+            } else {
+                // enable selection only when button is clicked to prevent flickering
+                enableDescriptionSelection();
+            }
+        });
+    }
+
+    private void enableDescriptionSelection() {
+        binding.detailDescriptionNoteView.setVisibility(View.VISIBLE);
+        binding.detailDescriptionView.setTextIsSelectable(true);
+
+        final String buttonLabel = getString(R.string.description_select_disable);
+        binding.detailSelectDescriptionButton.setContentDescription(buttonLabel);
+        TooltipCompat.setTooltipText(binding.detailSelectDescriptionButton, buttonLabel);
+        binding.detailSelectDescriptionButton.setImageResource(R.drawable.ic_close);
+    }
+
+    private void disableDescriptionSelection() {
+        // show description content again, otherwise some links are not clickable
+        final Description description = getDescription();
+        if (description != null) {
+            TextLinkifier.fromDescription(binding.detailDescriptionView,
+                    description, HtmlCompat.FROM_HTML_MODE_LEGACY,
+                    getService(), getStreamUrl(),
+                    descriptionDisposables, SET_LINK_MOVEMENT_METHOD);
+        }
+
+        binding.detailDescriptionNoteView.setVisibility(View.GONE);
+        binding.detailDescriptionView.setTextIsSelectable(false);
+
+        final String buttonLabel = getString(R.string.description_select_enable);
+        binding.detailSelectDescriptionButton.setContentDescription(buttonLabel);
+        TooltipCompat.setTooltipText(binding.detailSelectDescriptionButton, buttonLabel);
+        binding.detailSelectDescriptionButton.setImageResource(R.drawable.ic_select_all);
+    }
+
+    protected void addMetadataItem(final LayoutInflater inflater,
+                                   final LinearLayout layout,
+                                   final boolean linkifyContent,
+                                   @StringRes final int type,
+                                   @Nullable final String content) {
+        if (isBlank(content)) {
+            return;
+        }
+
+        final ItemMetadataBinding itemBinding =
+                ItemMetadataBinding.inflate(inflater, layout, false);
+
+        itemBinding.metadataTypeView.setText(type);
+        itemBinding.metadataTypeView.setOnLongClickListener(v -> {
+            ShareUtils.copyToClipboard(requireContext(), content);
+            return true;
+        });
+
+        if (linkifyContent) {
+            TextLinkifier.fromPlainText(itemBinding.metadataContentView, content, null, null,
+                    descriptionDisposables, SET_LINK_MOVEMENT_METHOD);
+        } else {
+            itemBinding.metadataContentView.setText(content);
+        }
+
+        itemBinding.metadataContentView.setClickable(true);
+
+        layout.addView(itemBinding.getRoot());
+    }
+
+    private void addTagsMetadataItem(final LayoutInflater inflater, final LinearLayout layout) {
+        final List<String> tags = getTags();
+
+        if (tags != null && !tags.isEmpty()) {
+            final var itemBinding = ItemMetadataTagsBinding.inflate(inflater, layout, false);
+
+            tags.stream().sorted(String.CASE_INSENSITIVE_ORDER).forEach(tag -> {
+                final Chip chip = (Chip) inflater.inflate(R.layout.chip,
+                        itemBinding.metadataTagsChips, false);
+                chip.setText(tag);
+                chip.setOnClickListener(this::onTagClick);
+                chip.setOnLongClickListener(this::onTagLongClick);
+                itemBinding.metadataTagsChips.addView(chip);
+            });
+
+            layout.addView(itemBinding.getRoot());
+        }
+    }
+
+    private void onTagClick(final View chip) {
+        if (getParentFragment() != null) {
+            NavigationHelper.openSearchFragment(getParentFragment().getParentFragmentManager(),
+                    getServiceId(), ((Chip) chip).getText().toString());
+        }
+    }
+
+    private boolean onTagLongClick(final View chip) {
+        ShareUtils.copyToClipboard(requireContext(), ((Chip) chip).getText().toString());
+        return true;
+    }
+}

app/src/main/java/org/schabi/newpipe/fragments/detail/DescriptionFragment.java

@@ -1,46 +1,29 @@
 package org.schabi.newpipe.fragments.detail;
 
-import static android.text.TextUtils.isEmpty;
 import static org.schabi.newpipe.extractor.stream.StreamExtractor.NO_AGE_LIMIT;
-import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
 import static org.schabi.newpipe.util.Localization.getAppLocale;
-import static org.schabi.newpipe.util.text.TextLinkifier.SET_LINK_MOVEMENT_METHOD;
 
-import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
-import android.view.ViewGroup;
 import android.widget.LinearLayout;
 
-import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
-import androidx.appcompat.widget.TooltipCompat;
-import androidx.core.text.HtmlCompat;
 
-import com.google.android.material.chip.Chip;
-
-import org.schabi.newpipe.BaseFragment;
 import org.schabi.newpipe.R;
-import org.schabi.newpipe.databinding.FragmentDescriptionBinding;
+import org.schabi.newpipe.extractor.StreamingService;
-import org.schabi.newpipe.databinding.ItemMetadataBinding;
-import org.schabi.newpipe.databinding.ItemMetadataTagsBinding;
 import org.schabi.newpipe.extractor.stream.Description;
 import org.schabi.newpipe.extractor.stream.StreamInfo;
 import org.schabi.newpipe.util.Localization;
-import org.schabi.newpipe.util.NavigationHelper;
+
-import org.schabi.newpipe.util.external_communication.ShareUtils;
+import java.util.List;
-import org.schabi.newpipe.util.text.TextLinkifier;
 
 import icepick.State;
-import io.reactivex.rxjava3.disposables.CompositeDisposable;
 
-public class DescriptionFragment extends BaseFragment {
+public class DescriptionFragment extends BaseDescriptionFragment {
 
     @State
     StreamInfo streamInfo = null;
-    final CompositeDisposable descriptionDisposables = new CompositeDisposable();
-    FragmentDescriptionBinding binding;
 
     public DescriptionFragment() {
     }
@@ -49,86 +32,64 @@ public class DescriptionFragment extends BaseFragment {
         this.streamInfo = streamInfo;
     }
 
+    @Nullable
     @Override
-    public View onCreateView(@NonNull final LayoutInflater inflater,
+    protected Description getDescription() {
-                             @Nullable final ViewGroup container,
+        if (streamInfo == null) {
-                             @Nullable final Bundle savedInstanceState) {
+            return null;
-        binding = FragmentDescriptionBinding.inflate(inflater, container, false);
-        if (streamInfo != null) {
-            setupUploadDate();
-            setupDescription();
-            setupMetadata(inflater, binding.detailMetadataLayout);
         }
-        return binding.getRoot();
+        return streamInfo.getDescription();
+    }
+
+    @Nullable
+    @Override
+    protected StreamingService getService() {
+        if (streamInfo == null) {
+            return null;
+        }
+        return streamInfo.getService();
     }
 
     @Override
-    public void onDestroy() {
+    protected int getServiceId() {
-        descriptionDisposables.clear();
+        if (streamInfo == null) {
-        super.onDestroy();
+            return -1;
+        }
+        return streamInfo.getServiceId();
     }
 
+    @Nullable
+    @Override
+    protected String getStreamUrl() {
+        if (streamInfo == null) {
+            return null;
+        }
+        return streamInfo.getUrl();
+    }
 
-    private void setupUploadDate() {
+    @Nullable
-        if (streamInfo.getUploadDate() != null) {
+    @Override
+    public List<String> getTags() {
+        if (streamInfo == null) {
+            return null;
+        }
+        return streamInfo.getTags();
+    }
+
+    @Override
+    protected void setupMetadata(final LayoutInflater inflater,
+                                 final LinearLayout layout) {
+        if (streamInfo != null && streamInfo.getUploadDate() != null) {
             binding.detailUploadDateView.setText(Localization
                     .localizeUploadDate(activity, streamInfo.getUploadDate().offsetDateTime()));
         } else {
             binding.detailUploadDateView.setVisibility(View.GONE);
         }
-    }
 
-
+        if (streamInfo == null) {
-    private void setupDescription() {
-        final Description description = streamInfo.getDescription();
-        if (description == null || isEmpty(description.getContent())
-                || description == Description.EMPTY_DESCRIPTION) {
-            binding.detailDescriptionView.setVisibility(View.GONE);
-            binding.detailSelectDescriptionButton.setVisibility(View.GONE);
             return;
         }
 
-        // start with disabled state. This also loads description content (!)
-        disableDescriptionSelection();
-
-        binding.detailSelectDescriptionButton.setOnClickListener(v -> {
-            if (binding.detailDescriptionNoteView.getVisibility() == View.VISIBLE) {
-                disableDescriptionSelection();
-            } else {
-                // enable selection only when button is clicked to prevent flickering
-                enableDescriptionSelection();
-            }
-        });
-    }
-
-    private void enableDescriptionSelection() {
-        binding.detailDescriptionNoteView.setVisibility(View.VISIBLE);
-        binding.detailDescriptionView.setTextIsSelectable(true);
-
-        final String buttonLabel = getString(R.string.description_select_disable);
-        binding.detailSelectDescriptionButton.setContentDescription(buttonLabel);
-        TooltipCompat.setTooltipText(binding.detailSelectDescriptionButton, buttonLabel);
-        binding.detailSelectDescriptionButton.setImageResource(R.drawable.ic_close);
-    }
-
-    private void disableDescriptionSelection() {
-        // show description content again, otherwise some links are not clickable
-        TextLinkifier.fromDescription(binding.detailDescriptionView,
-                streamInfo.getDescription(), HtmlCompat.FROM_HTML_MODE_LEGACY,
-                streamInfo.getService(), streamInfo.getUrl(),
-                descriptionDisposables, SET_LINK_MOVEMENT_METHOD);
-
-        binding.detailDescriptionNoteView.setVisibility(View.GONE);
-        binding.detailDescriptionView.setTextIsSelectable(false);
-
-        final String buttonLabel = getString(R.string.description_select_enable);
-        binding.detailSelectDescriptionButton.setContentDescription(buttonLabel);
-        TooltipCompat.setTooltipText(binding.detailSelectDescriptionButton, buttonLabel);
-        binding.detailSelectDescriptionButton.setImageResource(R.drawable.ic_select_all);
-    }
-
-    private void setupMetadata(final LayoutInflater inflater,
-                               final LinearLayout layout) {
         addMetadataItem(inflater, layout, false, R.string.metadata_category,
                 streamInfo.getCategory());
 
@@ -153,67 +114,6 @@ public class DescriptionFragment extends BaseFragment {
                 streamInfo.getHost());
         addMetadataItem(inflater, layout, true, R.string.metadata_thumbnail_url,
                 streamInfo.getThumbnailUrl());
-
-        addTagsMetadataItem(inflater, layout);
-    }
-
-    private void addMetadataItem(final LayoutInflater inflater,
-                                 final LinearLayout layout,
-                                 final boolean linkifyContent,
-                                 @StringRes final int type,
-                                 @Nullable final String content) {
-        if (isBlank(content)) {
-            return;
-        }
-
-        final ItemMetadataBinding itemBinding =
-                ItemMetadataBinding.inflate(inflater, layout, false);
-
-        itemBinding.metadataTypeView.setText(type);
-        itemBinding.metadataTypeView.setOnLongClickListener(v -> {
-            ShareUtils.copyToClipboard(requireContext(), content);
-            return true;
-        });
-
-        if (linkifyContent) {
-            TextLinkifier.fromPlainText(itemBinding.metadataContentView, content, null, null,
-                    descriptionDisposables, SET_LINK_MOVEMENT_METHOD);
-        } else {
-            itemBinding.metadataContentView.setText(content);
-        }
-
-        itemBinding.metadataContentView.setClickable(true);
-
-        layout.addView(itemBinding.getRoot());
-    }
-
-    private void addTagsMetadataItem(final LayoutInflater inflater, final LinearLayout layout) {
-        if (streamInfo.getTags() != null && !streamInfo.getTags().isEmpty()) {
-            final var itemBinding = ItemMetadataTagsBinding.inflate(inflater, layout, false);
-
-            streamInfo.getTags().stream().sorted(String.CASE_INSENSITIVE_ORDER).forEach(tag -> {
-                final Chip chip = (Chip) inflater.inflate(R.layout.chip,
-                        itemBinding.metadataTagsChips, false);
-                chip.setText(tag);
-                chip.setOnClickListener(this::onTagClick);
-                chip.setOnLongClickListener(this::onTagLongClick);
-                itemBinding.metadataTagsChips.addView(chip);
-            });
-
-            layout.addView(itemBinding.getRoot());
-        }
-    }
-
-    private void onTagClick(final View chip) {
-        if (getParentFragment() != null) {
-            NavigationHelper.openSearchFragment(getParentFragment().getParentFragmentManager(),
-                    streamInfo.getServiceId(), ((Chip) chip).getText().toString());
-        }
-    }
-
-    private boolean onTagLongClick(final View chip) {
-        ShareUtils.copyToClipboard(requireContext(), ((Chip) chip).getText().toString());
-        return true;
     }
 
     private void addPrivacyMetadataItem(final LayoutInflater inflater, final LinearLayout layout) {

app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java

@@ -112,6 +112,7 @@ import org.schabi.newpipe.util.StreamTypeUtil;
 import org.schabi.newpipe.util.ThemeHelper;
 import org.schabi.newpipe.util.external_communication.KoreUtils;
 import org.schabi.newpipe.util.external_communication.ShareUtils;
+import org.schabi.newpipe.util.PlayButtonHelper;
 
 import java.util.ArrayList;
 import java.util.Iterator;
@@ -535,9 +536,11 @@ public final class VideoDetailFragment
         }));
 
         binding.detailControlsBackground.setOnLongClickListener(makeOnLongClickListener(info ->
-                openBackgroundPlayer(true)));
+            openBackgroundPlayer(true)
+        ));
         binding.detailControlsPopup.setOnLongClickListener(makeOnLongClickListener(info ->
-                openPopupPlayer(true)));
+            openPopupPlayer(true)
+        ));
         binding.detailControlsDownload.setOnLongClickListener(makeOnLongClickListener(info ->
                 NavigationHelper.openDownloads(activity)));
 
@@ -620,8 +623,7 @@ public final class VideoDetailFragment
 
         final View.OnTouchListener controlsTouchListener = (view, motionEvent) -> {
             if (motionEvent.getAction() == MotionEvent.ACTION_DOWN
-                && PreferenceManager.getDefaultSharedPreferences(activity)
+                    && PlayButtonHelper.shouldShowHoldToAppendTip(activity)) {
-                    .getBoolean(getString(R.string.show_hold_to_append_key), true)) {
 
                 animate(binding.touchAppendDetail, true, 250, AnimationType.ALPHA, 0, () ->
                         animate(binding.touchAppendDetail, false, 1500, AnimationType.ALPHA, 1000));

app/src/main/java/org/schabi/newpipe/fragments/list/BaseListInfoFragment.java

@@ -16,7 +16,6 @@ import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.ListInfo;
 import org.schabi.newpipe.extractor.Page;
-import org.schabi.newpipe.extractor.channel.ChannelInfo;
 import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
 import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.views.NewPipeRecyclerView;
@@ -234,11 +233,7 @@ public abstract class BaseListInfoFragment<I extends InfoItem, L extends ListInf
                 showListFooter(hasMoreItems());
             } else {
                 infoListAdapter.clearStreamItemList();
-                // showEmptyState should be called only if there is no item as
+                showEmptyState();
-                // well as no header in infoListAdapter
-                if (!(result instanceof ChannelInfo && infoListAdapter.getItemCount() == 1)) {
-                    showEmptyState();
-                }
             }
         }
 

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

@@ -0,0 +1,107 @@
+package org.schabi.newpipe.fragments.list.channel;
+
+import static org.schabi.newpipe.extractor.stream.StreamExtractor.UNKNOWN_SUBSCRIBER_COUNT;
+
+import android.content.Context;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.LinearLayout;
+
+import androidx.annotation.Nullable;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.channel.ChannelInfo;
+import org.schabi.newpipe.extractor.stream.Description;
+import org.schabi.newpipe.fragments.detail.BaseDescriptionFragment;
+import org.schabi.newpipe.util.DeviceUtils;
+import org.schabi.newpipe.util.Localization;
+
+import java.util.List;
+
+import icepick.State;
+
+public class ChannelAboutFragment extends BaseDescriptionFragment {
+    @State
+    protected ChannelInfo channelInfo;
+
+    public static ChannelAboutFragment getInstance(final ChannelInfo channelInfo) {
+        final ChannelAboutFragment fragment = new ChannelAboutFragment();
+        fragment.channelInfo = channelInfo;
+        return fragment;
+    }
+
+    public ChannelAboutFragment() {
+        super();
+    }
+
+    @Override
+    protected void initViews(final View rootView, final Bundle savedInstanceState) {
+        super.initViews(rootView, savedInstanceState);
+        binding.constraintLayout.setPadding(0, DeviceUtils.dpToPx(8, requireContext()), 0, 0);
+    }
+
+    @Nullable
+    @Override
+    protected Description getDescription() {
+        if (channelInfo == null) {
+            return null;
+        }
+        return new Description(channelInfo.getDescription(), Description.PLAIN_TEXT);
+    }
+
+    @Nullable
+    @Override
+    protected StreamingService getService() {
+        if (channelInfo == null) {
+            return null;
+        }
+        return channelInfo.getService();
+    }
+
+    @Override
+    protected int getServiceId() {
+        if (channelInfo == null) {
+            return -1;
+        }
+        return channelInfo.getServiceId();
+    }
+
+    @Nullable
+    @Override
+    protected String getStreamUrl() {
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public List<String> getTags() {
+        if (channelInfo == null) {
+            return null;
+        }
+        return channelInfo.getTags();
+    }
+
+    @Override
+    protected void setupMetadata(final LayoutInflater inflater,
+                                 final LinearLayout layout) {
+        // There is no upload date available for channels, so hide the relevant UI element
+        binding.detailUploadDateView.setVisibility(View.GONE);
+
+        if (channelInfo == null) {
+            return;
+        }
+
+        final Context context = getContext();
+        if (channelInfo.getSubscriberCount() != UNKNOWN_SUBSCRIBER_COUNT) {
+            addMetadataItem(inflater, layout, false, R.string.metadata_subscribers,
+                    Localization.localizeNumber(context, channelInfo.getSubscriberCount()));
+        }
+
+        addMetadataItem(inflater, layout, true, R.string.metadata_avatar_url,
+                channelInfo.getAvatarUrl());
+        addMetadataItem(inflater, layout, true, R.string.metadata_banner_url,
+                channelInfo.getBannerUrl());
+    }
+}

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

@@ -1,10 +1,12 @@
 package org.schabi.newpipe.fragments.list.channel;
 
+import static org.schabi.newpipe.extractor.utils.Utils.isBlank;
 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.content.SharedPreferences;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.text.TextUtils;
@@ -16,51 +18,49 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.Button;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
-import androidx.appcompat.app.ActionBar;
 import androidx.core.content.ContextCompat;
+import androidx.core.graphics.ColorUtils;
+import androidx.preference.PreferenceManager;
 
 import com.google.android.material.snackbar.Snackbar;
+import com.google.android.material.tabs.TabLayout;
 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;
-import org.schabi.newpipe.databinding.PlaylistControlBinding;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.ErrorUtil;
 import org.schabi.newpipe.error.UserAction;
-import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.channel.ChannelInfo;
 import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
-import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
-import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
+import org.schabi.newpipe.fragments.BaseStateFragment;
+import org.schabi.newpipe.fragments.detail.TabAdapter;
 import org.schabi.newpipe.ktx.AnimationType;
-import org.schabi.newpipe.local.subscription.SubscriptionManager;
 import org.schabi.newpipe.local.feed.notifications.NotificationHelper;
-import org.schabi.newpipe.player.PlayerType;
+import org.schabi.newpipe.local.subscription.SubscriptionManager;
-import org.schabi.newpipe.player.playqueue.ChannelPlayQueue;
+import org.schabi.newpipe.util.ChannelTabHelper;
-import org.schabi.newpipe.player.playqueue.PlayQueue;
+import org.schabi.newpipe.util.Constants;
 import org.schabi.newpipe.util.ExtractorHelper;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.PicassoHelper;
+import org.schabi.newpipe.util.StateSaver;
 import org.schabi.newpipe.util.ThemeHelper;
 import org.schabi.newpipe.util.external_communication.ShareUtils;
 
 import java.util.List;
+import java.util.Queue;
 import java.util.concurrent.TimeUnit;
-import java.util.function.Supplier;
-import java.util.stream.Collectors;
 
+import icepick.State;
 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;
@@ -68,29 +68,37 @@ import io.reactivex.rxjava3.functions.Consumer;
 import io.reactivex.rxjava3.functions.Function;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 
-public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, ChannelInfo>
+public class ChannelFragment extends BaseStateFragment<ChannelInfo>
-        implements View.OnClickListener {
+        implements StateSaver.WriteRead {
 
     private static final int BUTTON_DEBOUNCE_INTERVAL = 100;
     private static final String PICASSO_CHANNEL_TAG = "PICASSO_CHANNEL_TAG";
 
+    @State
+    protected int serviceId = Constants.NO_SERVICE_ID;
+    @State
+    protected String name;
+    @State
+    protected String url;
+
+    private ChannelInfo currentInfo;
+    private Disposable currentWorker;
     private final CompositeDisposable disposables = new CompositeDisposable();
     private Disposable subscribeButtonMonitor;
-
+    private SubscriptionManager subscriptionManager;
+    private int lastTab;
     private boolean channelContentNotSupported = false;
 
     /*//////////////////////////////////////////////////////////////////////////
     // Views
     //////////////////////////////////////////////////////////////////////////*/
 
-    private SubscriptionManager subscriptionManager;
+    private FragmentChannelBinding binding;
-
+    private TabAdapter tabAdapter;
-    private FragmentChannelBinding channelBinding;
-    private ChannelHeaderBinding headerBinding;
-    private PlaylistControlBinding playlistControlBinding;
 
     private MenuItem menuRssButton;
     private MenuItem menuNotifyButton;
+    private SubscriptionEntity channelSubscription;
 
     public static ChannelFragment getInstance(final int serviceId, final String url,
                                               final String name) {
@@ -99,22 +107,23 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
         return instance;
     }
 
-    public ChannelFragment() {
+    private void setInitialData(final int sid, final String u, final String title) {
-        super(UserAction.REQUESTED_CHANNEL);
+        this.serviceId = sid;
+        this.url = u;
+        this.name = !TextUtils.isEmpty(title) ? title : "";
     }
 
-    @Override
-    public void onResume() {
-        super.onResume();
-        if (activity != null && useAsFrontPage) {
-            setTitle(currentInfo != null ? currentInfo.getName() : name);
-        }
-    }
 
     /*//////////////////////////////////////////////////////////////////////////
     // LifeCycle
     //////////////////////////////////////////////////////////////////////////*/
 
+    @Override
+    public void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setHasOptionsMenu(true);
+    }
+
     @Override
     public void onAttach(@NonNull final Context context) {
         super.onAttach(context);
@@ -125,49 +134,58 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
     public View onCreateView(@NonNull final LayoutInflater inflater,
                              @Nullable final ViewGroup container,
                              @Nullable final Bundle savedInstanceState) {
-        return inflater.inflate(R.layout.fragment_channel, container, false);
+        binding = FragmentChannelBinding.inflate(inflater, container, false);
+        return binding.getRoot();
     }
 
-    @Override
+    @Override // called from onViewCreated in BaseFragment.onViewCreated
-    public void onViewCreated(@NonNull final View rootView, final Bundle savedInstanceState) {
+    protected void initViews(final View rootView, final Bundle savedInstanceState) {
-        super.onViewCreated(rootView, savedInstanceState);
+        super.initViews(rootView, savedInstanceState);
-        channelBinding = FragmentChannelBinding.bind(rootView);
-        showContentNotSupportedIfNeeded();
-    }
 
-    @Override
+        tabAdapter = new TabAdapter(getChildFragmentManager());
-    public void onDestroy() {
+        binding.viewPager.setAdapter(tabAdapter);
-        super.onDestroy();
+        binding.tabLayout.setupWithViewPager(binding.viewPager);
-        disposables.clear();
+
-        if (subscribeButtonMonitor != null) {
+        setTitle(name);
-            subscribeButtonMonitor.dispose();
+        binding.channelTitleView.setText(name);
+        if (!PicassoHelper.getShouldLoadImages()) {
+            // do not waste space for the banner if it is not going to be loaded
+            binding.channelBannerImage.setImageDrawable(null);
         }
-        channelBinding = null;
-        headerBinding = null;
-        playlistControlBinding = null;
-    }
-
-    /*//////////////////////////////////////////////////////////////////////////
-    // Init
-    //////////////////////////////////////////////////////////////////////////*/
-
-    @Override
-    protected Supplier<View> getListHeaderSupplier() {
-        headerBinding = ChannelHeaderBinding
-                .inflate(activity.getLayoutInflater(), itemsList, false);
-        playlistControlBinding = headerBinding.playlistControl;
-
-        return headerBinding::getRoot;
     }
 
     @Override
     protected void initListeners() {
         super.initListeners();
 
-        headerBinding.subChannelTitleView.setOnClickListener(this);
+        final View.OnClickListener openSubChannel = v -> {
-        headerBinding.subChannelAvatarView.setOnClickListener(this);
+            if (!TextUtils.isEmpty(currentInfo.getParentChannelUrl())) {
+                try {
+                    NavigationHelper.openChannelFragment(getFM(), currentInfo.getServiceId(),
+                            currentInfo.getParentChannelUrl(),
+                            currentInfo.getParentChannelName());
+                } catch (final Exception e) {
+                    ErrorUtil.showUiErrorSnackbar(this, "Opening channel fragment", e);
+                }
+            } else if (DEBUG) {
+                Log.i(TAG, "Can't open parent channel because we got no channel URL");
+            }
+        };
+        binding.subChannelAvatarView.setOnClickListener(openSubChannel);
+        binding.subChannelTitleView.setOnClickListener(openSubChannel);
     }
 
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        if (currentWorker != null) {
+            currentWorker.dispose();
+        }
+        disposables.clear();
+        binding = null;
+    }
+
+
     /*//////////////////////////////////////////////////////////////////////////
     // Menu
     //////////////////////////////////////////////////////////////////////////*/
@@ -176,32 +194,33 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
     public void onCreateOptionsMenu(@NonNull final Menu menu,
                                     @NonNull final MenuInflater inflater) {
         super.onCreateOptionsMenu(menu, inflater);
-        final ActionBar supportActionBar = activity.getSupportActionBar();
+        inflater.inflate(R.menu.menu_channel, menu);
-        if (useAsFrontPage && supportActionBar != null) {
-            supportActionBar.setDisplayHomeAsUpEnabled(false);
-        } else {
-            inflater.inflate(R.menu.menu_channel, menu);
 
-            if (DEBUG) {
+        if (DEBUG) {
-                Log.d(TAG, "onCreateOptionsMenu() called with: "
+            Log.d(TAG, "onCreateOptionsMenu() called with: "
-                        + "menu = [" + menu + "], inflater = [" + inflater + "]");
+                    + "menu = [" + menu + "], inflater = [" + inflater + "]");
-            }
-            menuRssButton = menu.findItem(R.id.menu_item_rss);
-            menuNotifyButton = menu.findItem(R.id.menu_item_notify);
         }
     }
 
     @Override
-    public boolean onOptionsItemSelected(final MenuItem item) {
+    public void onPrepareOptionsMenu(@NonNull final Menu menu) {
+        super.onPrepareOptionsMenu(menu);
+        menuRssButton = menu.findItem(R.id.menu_item_rss);
+        menuNotifyButton = menu.findItem(R.id.menu_item_notify);
+        updateNotifyButton(channelSubscription);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(@NonNull final MenuItem item) {
         switch (item.getItemId()) {
-            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.action_settings:
+                NavigationHelper.openSettings(requireContext());
+                break;
             case R.id.menu_item_rss:
                 if (currentInfo != null) {
                     ShareUtils.openUrlInApp(requireContext(), currentInfo.getFeedUrl());
@@ -224,13 +243,14 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
         return true;
     }
 
+
     /*//////////////////////////////////////////////////////////////////////////
     // Channel Subscription
     //////////////////////////////////////////////////////////////////////////*/
 
     private void monitorSubscription(final ChannelInfo info) {
         final Consumer<Throwable> onError = (Throwable throwable) -> {
-            animate(headerBinding.channelSubscribeButton, false, 100);
+            animate(binding.channelSubscribeButton, false, 100);
             showSnackBarError(new ErrorInfo(throwable, UserAction.SUBSCRIPTION_GET,
                     "Get subscription status", currentInfo));
         };
@@ -263,10 +283,9 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
                 }, onError));
     }
 
-    private Function<Object, Object> mapOnSubscribe(final SubscriptionEntity subscription,
+    private Function<Object, Object> mapOnSubscribe(final SubscriptionEntity subscription) {
-                                                    final ChannelInfo info) {
         return (@NonNull Object o) -> {
-            subscriptionManager.insertSubscription(subscription, info);
+            subscriptionManager.insertSubscription(subscription);
             return o;
         };
     }
@@ -298,8 +317,7 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
                 .subscribe(onComplete, onError));
     }
 
-    private Disposable monitorSubscribeButton(final Button subscribeButton,
+    private Disposable monitorSubscribeButton(final Function<Object, Object> action) {
-                                              final Function<Object, Object> action) {
         final Consumer<Object> onNext = (@NonNull Object o) -> {
             if (DEBUG) {
                 Log.d(TAG, "Changed subscription status to this channel!");
@@ -311,7 +329,7 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
                         "Changing subscription for " + currentInfo.getUrl(), currentInfo));
 
         /* Emit clicks from main thread unto io thread */
-        return RxView.clicks(subscribeButton)
+        return RxView.clicks(binding.channelSubscribeButton)
                 .subscribeOn(AndroidSchedulers.mainThread())
                 .observeOn(Schedulers.io())
                 .debounce(BUTTON_DEBOUNCE_INTERVAL, TimeUnit.MILLISECONDS) // Ignore rapid clicks
@@ -340,17 +358,17 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
                         info.getAvatarUrl(),
                         info.getDescription(),
                         info.getSubscriberCount());
+                channelSubscription = null;
                 updateNotifyButton(null);
-                subscribeButtonMonitor = monitorSubscribeButton(
+                subscribeButtonMonitor = monitorSubscribeButton(mapOnSubscribe(channel));
-                        headerBinding.channelSubscribeButton, mapOnSubscribe(channel, info));
             } else {
                 if (DEBUG) {
                     Log.d(TAG, "Found subscription to this channel!");
                 }
-                final SubscriptionEntity subscription = subscriptionEntities.get(0);
+                channelSubscription = subscriptionEntities.get(0);
-                updateNotifyButton(subscription);
+                updateNotifyButton(channelSubscription);
-                subscribeButtonMonitor = monitorSubscribeButton(
+                subscribeButtonMonitor =
-                        headerBinding.channelSubscribeButton, mapOnUnsubscribe(subscription));
+                        monitorSubscribeButton(mapOnUnsubscribe(channelSubscription));
             }
         };
     }
@@ -361,34 +379,33 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
                     + "isSubscribed = [" + isSubscribed + "]");
         }
 
-        final boolean isButtonVisible = headerBinding.channelSubscribeButton.getVisibility()
+        final boolean isButtonVisible = binding.channelSubscribeButton.getVisibility()
                 == View.VISIBLE;
         final int backgroundDuration = isButtonVisible ? 300 : 0;
         final int textDuration = isButtonVisible ? 200 : 0;
 
-        final int subscribeBackground = ThemeHelper
-                .resolveColorFromAttr(activity, R.attr.colorPrimary);
-        final int subscribeText = ContextCompat.getColor(activity, R.color.subscribe_text_color);
         final int subscribedBackground = ContextCompat
                 .getColor(activity, R.color.subscribed_background_color);
         final int subscribedText = ContextCompat.getColor(activity, R.color.subscribed_text_color);
+        final int subscribeBackground = ColorUtils.blendARGB(ThemeHelper
+                .resolveColorFromAttr(activity, R.attr.colorPrimary), subscribedBackground, 0.35f);
+        final int subscribeText = ContextCompat.getColor(activity, R.color.subscribe_text_color);
 
-        if (!isSubscribed) {
+        if (isSubscribed) {
-            headerBinding.channelSubscribeButton.setText(R.string.subscribe_button_title);
+            binding.channelSubscribeButton.setText(R.string.subscribed_button_title);
-            animateBackgroundColor(headerBinding.channelSubscribeButton, backgroundDuration,
+            animateBackgroundColor(binding.channelSubscribeButton, backgroundDuration,
-                    subscribedBackground, subscribeBackground);
-            animateTextColor(headerBinding.channelSubscribeButton, textDuration, subscribedText,
-                    subscribeText);
-        } else {
-            headerBinding.channelSubscribeButton.setText(R.string.subscribed_button_title);
-            animateBackgroundColor(headerBinding.channelSubscribeButton, backgroundDuration,
                     subscribeBackground, subscribedBackground);
-            animateTextColor(headerBinding.channelSubscribeButton, textDuration, subscribeText,
+            animateTextColor(binding.channelSubscribeButton, textDuration, subscribeText,
                     subscribedText);
+        } else {
+            binding.channelSubscribeButton.setText(R.string.subscribe_button_title);
+            animateBackgroundColor(binding.channelSubscribeButton, backgroundDuration,
+                    subscribedBackground, subscribeBackground);
+            animateTextColor(binding.channelSubscribeButton, textDuration, subscribedText,
+                    subscribeText);
         }
 
-        animate(headerBinding.channelSubscribeButton, true, 100,
+        animate(binding.channelSubscribeButton, true, 100, AnimationType.LIGHT_SCALE_AND_ALPHA);
-                AnimationType.LIGHT_SCALE_AND_ALPHA);
     }
 
     private void updateNotifyButton(@Nullable final SubscriptionEntity subscription) {
@@ -424,108 +441,179 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
      * Show a snackbar with the option to enable notifications on new streams for this channel.
      */
     private void showNotifySnackbar() {
-        Snackbar.make(itemsList, R.string.you_successfully_subscribed, Snackbar.LENGTH_LONG)
+        Snackbar.make(binding.getRoot(), R.string.you_successfully_subscribed, Snackbar.LENGTH_LONG)
                 .setAction(R.string.get_notified, v -> setNotify(true))
                 .setActionTextColor(Color.YELLOW)
                 .show();
     }
 
-    /*//////////////////////////////////////////////////////////////////////////
-    // Load and handle
-    //////////////////////////////////////////////////////////////////////////*/
-
-    @Override
-    protected Single<ListExtractor.InfoItemsPage<StreamInfoItem>> loadMoreItemsLogic() {
-        return ExtractorHelper.getMoreChannelItems(serviceId, url, currentNextPage);
-    }
-
-    @Override
-    protected Single<ChannelInfo> loadResult(final boolean forceLoad) {
-        return ExtractorHelper.getChannelInfo(serviceId, url, forceLoad);
-    }
 
     /*//////////////////////////////////////////////////////////////////////////
-    // OnClick
+    // Init
     //////////////////////////////////////////////////////////////////////////*/
 
-    @Override
+    private void updateTabs() {
-    public void onClick(final View v) {
+        tabAdapter.clearAllItems();
-        if (isLoading.get() || currentInfo == null) {
-            return;
-        }
 
-        switch (v.getId()) {
+        if (currentInfo != null && !channelContentNotSupported) {
-            case R.id.sub_channel_avatar_view:
+            final Context context = requireContext();
-            case R.id.sub_channel_title_view:
+            final SharedPreferences preferences = PreferenceManager
-                if (!TextUtils.isEmpty(currentInfo.getParentChannelUrl())) {
+                    .getDefaultSharedPreferences(context);
-                    try {
+
-                        NavigationHelper.openChannelFragment(getFM(), currentInfo.getServiceId(),
+            for (final ListLinkHandler linkHandler : currentInfo.getTabs()) {
-                                currentInfo.getParentChannelUrl(),
+                final String tab = linkHandler.getContentFilters().get(0);
-                                currentInfo.getParentChannelName());
+                if (ChannelTabHelper.showChannelTab(context, preferences, tab)) {
-                    } catch (final Exception e) {
+                    final ChannelTabFragment channelTabFragment =
-                        ErrorUtil.showUiErrorSnackbar(this, "Opening channel fragment", e);
+                            ChannelTabFragment.getInstance(serviceId, linkHandler, name);
-                    }
+                    channelTabFragment.useAsFrontPage(useAsFrontPage);
-                } else if (DEBUG) {
+                    tabAdapter.addFragment(channelTabFragment,
-                    Log.i(TAG, "Can't open parent channel because we got no channel URL");
+                            context.getString(ChannelTabHelper.getTranslationKey(tab)));
                 }
-                break;
+            }
+
+            if (ChannelTabHelper.showChannelTab(
+                    context, preferences, R.string.show_channel_tabs_about)) {
+                tabAdapter.addFragment(
+                        ChannelAboutFragment.getInstance(currentInfo),
+                        context.getString(R.string.channel_tab_about));
+            }
+        }
+
+        tabAdapter.notifyDataSetUpdate();
+
+        for (int i = 0; i < tabAdapter.getCount(); i++) {
+            binding.tabLayout.getTabAt(i).setText(tabAdapter.getItemTitle(i));
+        }
+
+        // Restore previously selected tab
+        final TabLayout.Tab ltab = binding.tabLayout.getTabAt(lastTab);
+        if (ltab != null) {
+            binding.tabLayout.selectTab(ltab);
         }
     }
 
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // State Saving
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    public String generateSuffix() {
+        return null;
+    }
+
+    @Override
+    public void writeTo(final Queue<Object> objectsToSave) {
+        objectsToSave.add(currentInfo);
+        objectsToSave.add(binding == null ? 0 : binding.tabLayout.getSelectedTabPosition());
+    }
+
+    @Override
+    public void readFrom(@NonNull final Queue<Object> savedObjects) {
+        currentInfo = (ChannelInfo) savedObjects.poll();
+        lastTab = (Integer) savedObjects.poll();
+    }
+
+    @Override
+    public void onSaveInstanceState(final @NonNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        if (binding != null) {
+            outState.putInt("LastTab", binding.tabLayout.getSelectedTabPosition());
+        }
+    }
+
+    @Override
+    protected void onRestoreInstanceState(@NonNull final Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+        lastTab = savedInstanceState.getInt("LastTab", 0);
+    }
+
+
     /*//////////////////////////////////////////////////////////////////////////
     // Contract
     //////////////////////////////////////////////////////////////////////////*/
 
+    @Override
+    protected void doInitialLoadLogic() {
+        if (currentInfo == null) {
+            startLoading(false);
+        } else {
+            handleResult(currentInfo);
+        }
+    }
+
+    @Override
+    public void startLoading(final boolean forceLoad) {
+        super.startLoading(forceLoad);
+
+        currentInfo = null;
+        updateTabs();
+        if (currentWorker != null) {
+            currentWorker.dispose();
+        }
+
+        runWorker(forceLoad);
+    }
+
+    private void runWorker(final boolean forceLoad) {
+        currentWorker = ExtractorHelper.getChannelInfo(serviceId, url, forceLoad)
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(result -> {
+                    isLoading.set(false);
+                    handleResult(result);
+                }, throwable -> showError(new ErrorInfo(throwable, UserAction.REQUESTED_CHANNEL,
+                        url == null ? "No URL" : url, serviceId)));
+    }
+
     @Override
     public void showLoading() {
         super.showLoading();
         PicassoHelper.cancelTag(PICASSO_CHANNEL_TAG);
-        animate(headerBinding.channelSubscribeButton, false, 100);
+        animate(binding.channelSubscribeButton, false, 100);
     }
 
     @Override
     public void handleResult(@NonNull final ChannelInfo result) {
         super.handleResult(result);
+        currentInfo = result;
+        setInitialData(result.getServiceId(), result.getOriginalUrl(), result.getName());
+
+        if (PicassoHelper.getShouldLoadImages() && !isBlank(result.getBannerUrl())) {
+            PicassoHelper.loadBanner(result.getBannerUrl()).tag(PICASSO_CHANNEL_TAG)
+                    .into(binding.channelBannerImage);
+        } else {
+            // do not waste space for the banner, if the user disabled images or there is not one
+            binding.channelBannerImage.setImageDrawable(null);
+        }
 
-        headerBinding.getRoot().setVisibility(View.VISIBLE);
-        PicassoHelper.loadBanner(result.getBannerUrl()).tag(PICASSO_CHANNEL_TAG)
-                .into(headerBinding.channelBannerImage);
         PicassoHelper.loadAvatar(result.getAvatarUrl()).tag(PICASSO_CHANNEL_TAG)
-                .into(headerBinding.channelAvatarView);
+                .into(binding.channelAvatarView);
         PicassoHelper.loadAvatar(result.getParentChannelAvatarUrl()).tag(PICASSO_CHANNEL_TAG)
-                .into(headerBinding.subChannelAvatarView);
+                .into(binding.subChannelAvatarView);
 
-        headerBinding.channelSubscriberView.setVisibility(View.VISIBLE);
+        binding.channelTitleView.setText(result.getName());
+        binding.channelSubscriberView.setVisibility(View.VISIBLE);
         if (result.getSubscriberCount() >= 0) {
-            headerBinding.channelSubscriberView.setText(Localization
+            binding.channelSubscriberView.setText(Localization
                     .shortSubscriberCount(activity, result.getSubscriberCount()));
         } else {
-            headerBinding.channelSubscriberView.setText(R.string.subscribers_count_not_available);
+            binding.channelSubscriberView.setText(R.string.subscribers_count_not_available);
         }
 
         if (!TextUtils.isEmpty(currentInfo.getParentChannelName())) {
-            headerBinding.subChannelTitleView.setText(String.format(
+            binding.subChannelTitleView.setText(String.format(
                     getString(R.string.channel_created_by),
                     currentInfo.getParentChannelName())
             );
-            headerBinding.subChannelTitleView.setVisibility(View.VISIBLE);
+            binding.subChannelTitleView.setVisibility(View.VISIBLE);
-            headerBinding.subChannelAvatarView.setVisibility(View.VISIBLE);
+            binding.subChannelAvatarView.setVisibility(View.VISIBLE);
-        } else {
-            headerBinding.subChannelTitleView.setVisibility(View.GONE);
         }
 
         if (menuRssButton != null) {
             menuRssButton.setVisible(!TextUtils.isEmpty(result.getFeedUrl()));
         }
 
-        // PlaylistControls should be visible only if there is some item in
-        // infoListAdapter other than header
-        if (infoListAdapter.getItemCount() != 1) {
-            playlistControlBinding.getRoot().setVisibility(View.VISIBLE);
-        } else {
-            playlistControlBinding.getRoot().setVisibility(View.GONE);
-        }
-
         channelContentNotSupported = false;
         for (final Throwable throwable : result.getErrors()) {
             if (throwable instanceof ContentNotSupportedException) {
@@ -539,62 +627,21 @@ public class ChannelFragment extends BaseListInfoFragment<StreamInfoItem, Channe
         if (subscribeButtonMonitor != null) {
             subscribeButtonMonitor.dispose();
         }
+
+        updateTabs();
         updateSubscription(result);
         monitorSubscription(result);
-
-        playlistControlBinding.playlistCtrlPlayAllButton
-                .setOnClickListener(view -> NavigationHelper
-                        .playOnMainPlayer(activity, getPlayQueue()));
-        playlistControlBinding.playlistCtrlPlayPopupButton
-                .setOnClickListener(view -> NavigationHelper
-                        .playOnPopupPlayer(activity, getPlayQueue(), false));
-        playlistControlBinding.playlistCtrlPlayBgButton
-                .setOnClickListener(view -> NavigationHelper
-                        .playOnBackgroundPlayer(activity, getPlayQueue(), false));
-
-        playlistControlBinding.playlistCtrlPlayPopupButton.setOnLongClickListener(view -> {
-            NavigationHelper.enqueueOnPlayer(activity, getPlayQueue(), PlayerType.POPUP);
-            return true;
-        });
-
-        playlistControlBinding.playlistCtrlPlayBgButton.setOnLongClickListener(view -> {
-            NavigationHelper.enqueueOnPlayer(activity, getPlayQueue(), PlayerType.AUDIO);
-            return true;
-        });
     }
 
     private void showContentNotSupportedIfNeeded() {
         // channelBinding might not be initialized when handleResult() is called
         // (e.g. after rotating the screen, #6696)
-        if (!channelContentNotSupported || channelBinding == null) {
+        if (!channelContentNotSupported || binding == null) {
             return;
         }
 
-        channelBinding.errorContentNotSupported.setVisibility(View.VISIBLE);
+        binding.errorContentNotSupported.setVisibility(View.VISIBLE);
-        channelBinding.channelKaomoji.setText("(︶︹︺)");
+        binding.channelKaomoji.setText("(︶︹︺)");
-        channelBinding.channelKaomoji.setTextSize(TypedValue.COMPLEX_UNIT_SP, 45f);
+        binding.channelKaomoji.setTextSize(TypedValue.COMPLEX_UNIT_SP, 45f);
-        channelBinding.emptyStateMessage.setVisibility(View.GONE);
-    }
-
-    private PlayQueue getPlayQueue() {
-        final List<StreamInfoItem> streamItems = infoListAdapter.getItemsList().stream()
-                .filter(StreamInfoItem.class::isInstance)
-                .map(StreamInfoItem.class::cast)
-                .collect(Collectors.toList());
-
-        return new ChannelPlayQueue(currentInfo.getServiceId(), currentInfo.getUrl(),
-                currentInfo.getNextPage(), streamItems, 0);
-    }
-
-    /*//////////////////////////////////////////////////////////////////////////
-    // Utils
-    //////////////////////////////////////////////////////////////////////////*/
-
-    @Override
-    public void setTitle(final String title) {
-        super.setTitle(title);
-        if (!useAsFrontPage) {
-            headerBinding.channelTitleView.setText(title);
-        }
     }
 }

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

@@ -0,0 +1,140 @@
+package org.schabi.newpipe.fragments.list.channel;
+
+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 org.schabi.newpipe.R;
+import org.schabi.newpipe.databinding.PlaylistControlBinding;
+import org.schabi.newpipe.error.UserAction;
+import org.schabi.newpipe.extractor.InfoItem;
+import org.schabi.newpipe.extractor.ListExtractor;
+import org.schabi.newpipe.extractor.channel.tabs.ChannelTabInfo;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+import org.schabi.newpipe.fragments.list.BaseListInfoFragment;
+import org.schabi.newpipe.fragments.list.playlist.PlaylistControlViewHolder;
+import org.schabi.newpipe.player.playqueue.ChannelTabPlayQueue;
+import org.schabi.newpipe.player.playqueue.PlayQueue;
+import org.schabi.newpipe.util.ChannelTabHelper;
+import org.schabi.newpipe.util.ExtractorHelper;
+import org.schabi.newpipe.util.PlayButtonHelper;
+
+import java.util.List;
+import java.util.function.Supplier;
+import java.util.stream.Collectors;
+
+import icepick.State;
+import io.reactivex.rxjava3.core.Single;
+
+public class ChannelTabFragment extends BaseListInfoFragment<InfoItem, ChannelTabInfo>
+        implements PlaylistControlViewHolder {
+
+    // states must be protected and not private for IcePick being able to access them
+    @State
+    protected ListLinkHandler tabHandler;
+    @State
+    protected String channelName;
+
+    private PlaylistControlBinding playlistControlBinding;
+
+    @NonNull
+    public static ChannelTabFragment getInstance(final int serviceId,
+                                                 final ListLinkHandler tabHandler,
+                                                 final String channelName) {
+        final ChannelTabFragment instance = new ChannelTabFragment();
+        instance.serviceId = serviceId;
+        instance.tabHandler = tabHandler;
+        instance.channelName = channelName;
+        return instance;
+    }
+
+    public ChannelTabFragment() {
+        super(UserAction.REQUESTED_CHANNEL);
+    }
+
+    /*//////////////////////////////////////////////////////////////////////////
+    // LifeCycle
+    //////////////////////////////////////////////////////////////////////////*/
+
+    @Override
+    public void onCreate(final Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setHasOptionsMenu(false);
+    }
+
+    @Override
+    public View onCreateView(@NonNull final LayoutInflater inflater,
+                             @Nullable final ViewGroup container,
+                             @Nullable final Bundle savedInstanceState) {
+        return inflater.inflate(R.layout.fragment_channel_tab, container, false);
+    }
+
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        playlistControlBinding = null;
+    }
+
+    @Override
+    protected Supplier<View> getListHeaderSupplier() {
+        if (ChannelTabHelper.isStreamsTab(tabHandler)) {
+            playlistControlBinding = PlaylistControlBinding
+                    .inflate(activity.getLayoutInflater(), itemsList, false);
+            return playlistControlBinding::getRoot;
+        }
+        return null;
+    }
+
+    @Override
+    protected Single<ChannelTabInfo> loadResult(final boolean forceLoad) {
+        return ExtractorHelper.getChannelTab(serviceId, tabHandler, forceLoad);
+    }
+
+    @Override
+    protected Single<ListExtractor.InfoItemsPage<InfoItem>> loadMoreItemsLogic() {
+        return ExtractorHelper.getMoreChannelTabItems(serviceId, tabHandler, currentNextPage);
+    }
+
+    @Override
+    public void setTitle(final String title) {
+        // The channel name is displayed as title in the toolbar.
+        // The title is always a description of the content of the tab fragment.
+        // It should be unique for each channel because multiple channel tabs
+        // can be added to the main page. Therefore, the channel name is used.
+        // Using the title variable would cause the title to be the same for all channel tabs.
+        super.setTitle(channelName);
+    }
+
+    @Override
+    public void handleResult(@NonNull final ChannelTabInfo result) {
+        super.handleResult(result);
+
+        if (playlistControlBinding != null) {
+            // PlaylistControls should be visible only if there is some item in
+            // infoListAdapter other than header
+            if (infoListAdapter.getItemCount() > 1) {
+                playlistControlBinding.getRoot().setVisibility(View.VISIBLE);
+            } else {
+                playlistControlBinding.getRoot().setVisibility(View.GONE);
+            }
+
+            PlayButtonHelper.initPlaylistControlClickListener(
+                    activity, playlistControlBinding, this);
+        }
+    }
+
+    public PlayQueue getPlayQueue() {
+        final List<StreamInfoItem> streamItems = infoListAdapter.getItemsList().stream()
+                .filter(StreamInfoItem.class::isInstance)
+                .map(StreamInfoItem.class::cast)
+                .collect(Collectors.toList());
+
+        return new ChannelTabPlayQueue(currentInfo.getServiceId(), tabHandler,
+                currentInfo.getNextPage(), streamItems, 0);
+    }
+}

app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistControlViewHolder.java

@@ -0,0 +1,11 @@
+package org.schabi.newpipe.fragments.list.playlist;
+
+import org.schabi.newpipe.player.playqueue.PlayQueue;
+
+/**
+ * Interface for {@code R.layout.playlist_control} view holders
+ * to give access to the play queue.
+ */
+public interface PlaylistControlViewHolder {
+    PlayQueue getPlayQueue();
+}

app/src/main/java/org/schabi/newpipe/fragments/list/playlist/PlaylistFragment.java

@@ -43,7 +43,6 @@ import org.schabi.newpipe.info_list.dialog.InfoItemDialog;
 import org.schabi.newpipe.info_list.dialog.StreamDialogDefaultEntry;
 import org.schabi.newpipe.local.dialog.PlaylistDialog;
 import org.schabi.newpipe.local.playlist.RemotePlaylistManager;
-import org.schabi.newpipe.player.PlayerType;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.player.playqueue.PlaylistPlayQueue;
 import org.schabi.newpipe.util.ExtractorHelper;
@@ -51,6 +50,7 @@ import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.PicassoHelper;
 import org.schabi.newpipe.util.external_communication.ShareUtils;
+import org.schabi.newpipe.util.PlayButtonHelper;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -64,7 +64,8 @@ import io.reactivex.rxjava3.core.Single;
 import io.reactivex.rxjava3.disposables.CompositeDisposable;
 import io.reactivex.rxjava3.disposables.Disposable;
 
-public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, PlaylistInfo> {
+public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, PlaylistInfo>
+        implements PlaylistControlViewHolder {
 
     private static final String PICASSO_PLAYLIST_TAG = "PICASSO_PLAYLIST_TAG";
 
@@ -332,25 +333,10 @@ public class PlaylistFragment extends BaseListInfoFragment<StreamInfoItem, Playl
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(getPlaylistBookmarkSubscriber());
 
-        playlistControlBinding.playlistCtrlPlayAllButton.setOnClickListener(view ->
+        PlayButtonHelper.initPlaylistControlClickListener(activity, playlistControlBinding, this);
-                NavigationHelper.playOnMainPlayer(activity, getPlayQueue()));
-        playlistControlBinding.playlistCtrlPlayPopupButton.setOnClickListener(view ->
-                NavigationHelper.playOnPopupPlayer(activity, getPlayQueue(), false));
-        playlistControlBinding.playlistCtrlPlayBgButton.setOnClickListener(view ->
-                NavigationHelper.playOnBackgroundPlayer(activity, getPlayQueue(), false));
-
-        playlistControlBinding.playlistCtrlPlayPopupButton.setOnLongClickListener(view -> {
-            NavigationHelper.enqueueOnPlayer(activity, getPlayQueue(), PlayerType.POPUP);
-            return true;
-        });
-
-        playlistControlBinding.playlistCtrlPlayBgButton.setOnLongClickListener(view -> {
-            NavigationHelper.enqueueOnPlayer(activity, getPlayQueue(), PlayerType.AUDIO);
-            return true;
-        });
     }
 
-    private PlayQueue getPlayQueue() {
+    public PlayQueue getPlayQueue() {
         return getPlayQueue(0);
     }
 

app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt

@@ -60,6 +60,7 @@ import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
 import org.schabi.newpipe.databinding.FragmentFeedBinding
 import org.schabi.newpipe.error.ErrorInfo
+import org.schabi.newpipe.error.ErrorUtil
 import org.schabi.newpipe.error.UserAction
 import org.schabi.newpipe.extractor.exceptions.AccountTerminatedException
 import org.schabi.newpipe.extractor.exceptions.ContentNotAvailableException
@@ -453,24 +454,33 @@ class FeedFragment : BaseStateFragment<FeedState>() {
             if (t is FeedLoadService.RequestException &&
                 t.cause is ContentNotAvailableException
             ) {
-                Single.fromCallable {
+                disposables.add(
-                    NewPipeDatabase.getInstance(requireContext()).subscriptionDAO()
+                    Single.fromCallable {
-                        .getSubscription(t.subscriptionId)
+                        NewPipeDatabase.getInstance(requireContext()).subscriptionDAO()
-                }.subscribeOn(Schedulers.io())
+                            .getSubscription(t.subscriptionId)
-                    .observeOn(AndroidSchedulers.mainThread())
+                    }
-                    .subscribe(
+                        .subscribeOn(Schedulers.io())
-                        { subscriptionEntity ->
+                        .observeOn(AndroidSchedulers.mainThread())
-                            handleFeedNotAvailable(
+                        .subscribe(
-                                subscriptionEntity,
+                            { subscriptionEntity ->
-                                t.cause,
+                                handleFeedNotAvailable(
-                                errors.subList(i + 1, errors.size)
+                                    subscriptionEntity,
-                            )
+                                    t.cause,
-                        },
+                                    errors.subList(i + 1, errors.size)
-                        { throwable -> Log.e(TAG, "Unable to process", throwable) }
+                                )
-                    )
+                            },
-                return // this will be called on the remaining errors by handleFeedNotAvailable()
+                            { throwable -> Log.e(TAG, "Unable to process", throwable) }
+                        )
+                )
+                // this will be called on the remaining errors by handleFeedNotAvailable()
+                return@handleItemsErrors
             }
         }
+
+        if (errors.isNotEmpty()) {
+            // if no error was a ContentNotAvailableException, show a general error snackbar
+            ErrorUtil.showSnackbar(this, ErrorInfo(errors, UserAction.REQUESTED_FEED, ""))
+        }
     }
 
     private fun handleFeedNotAvailable(

app/src/main/java/org/schabi/newpipe/local/feed/FeedState.kt

@@ -13,9 +13,9 @@ sealed class FeedState {
 
     data class LoadedState(
         val items: List<StreamItem>,
-        val oldestUpdate: OffsetDateTime? = null,
+        val oldestUpdate: OffsetDateTime?,
         val notLoadedCount: Long,
-        val itemsErrors: List<Throwable> = emptyList()
+        val itemsErrors: List<Throwable>
     ) : FeedState()
 
     data class ErrorState(

app/src/main/java/org/schabi/newpipe/local/feed/FeedViewModel.kt

@@ -86,7 +86,7 @@ class FeedViewModel(
         .subscribe { (event, listFromDB, notLoadedCount, oldestUpdate) ->
             mutableStateLiveData.postValue(
                 when (event) {
-                    is IdleEvent -> FeedState.LoadedState(listFromDB.map { e -> StreamItem(e) }, oldestUpdate, notLoadedCount)
+                    is IdleEvent -> FeedState.LoadedState(listFromDB.map { e -> StreamItem(e) }, oldestUpdate, notLoadedCount, listOf())
                     is ProgressEvent -> FeedState.ProgressState(event.currentProgress, event.maxProgress, event.progressMessage)
                     is SuccessResultEvent -> FeedState.LoadedState(listFromDB.map { e -> StreamItem(e) }, oldestUpdate, notLoadedCount, event.itemsErrors)
                     is ErrorResultEvent -> FeedState.ErrorState(event.error)

app/src/main/java/org/schabi/newpipe/local/feed/notifications/NotificationHelper.kt

@@ -58,7 +58,7 @@ class NotificationHelper(val context: Context) {
             .setAutoCancel(true)
             .setCategory(NotificationCompat.CATEGORY_SOCIAL)
             .setGroupSummary(true)
-            .setGroup(data.listInfo.url)
+            .setGroup(data.originalInfo.url)
             .setGroupAlertBehavior(NotificationCompat.GROUP_ALERT_SUMMARY)
 
         // Build a summary notification for Android versions < 7.0
@@ -73,7 +73,7 @@ class NotificationHelper(val context: Context) {
                 context,
                 data.pseudoId,
                 NavigationHelper
-                    .getChannelIntent(context, data.listInfo.serviceId, data.listInfo.url)
+                    .getChannelIntent(context, data.originalInfo.serviceId, data.originalInfo.url)
                     .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK),
                 0,
                 false
@@ -88,7 +88,7 @@ class NotificationHelper(val context: Context) {
 
                 // Show individual stream notifications, set channel icon only if there is actually
                 // one
-                showStreamNotifications(newStreams, data.listInfo.serviceId, bitmap)
+                showStreamNotifications(newStreams, data.originalInfo.serviceId, bitmap)
                 // Show summary notification
                 manager.notify(data.pseudoId, summaryBuilder.build())
 
@@ -97,7 +97,7 @@ class NotificationHelper(val context: Context) {
 
             override fun onBitmapFailed(e: Exception, errorDrawable: Drawable) {
                 // Show individual stream notifications
-                showStreamNotifications(newStreams, data.listInfo.serviceId, null)
+                showStreamNotifications(newStreams, data.originalInfo.serviceId, null)
                 // Show summary notification
                 manager.notify(data.pseudoId, summaryBuilder.build())
                 iconLoadingTargets.remove(this) // allow it to be garbage-collected

app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadManager.kt

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.local.feed.service
 
 import android.content.Context
+import android.content.SharedPreferences
 import androidx.preference.PreferenceManager
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
 import io.reactivex.rxjava3.core.Completable
@@ -13,11 +14,17 @@ import io.reactivex.rxjava3.schedulers.Schedulers
 import org.schabi.newpipe.R
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity
 import org.schabi.newpipe.database.subscription.NotificationMode
-import org.schabi.newpipe.extractor.ListInfo
+import org.schabi.newpipe.database.subscription.SubscriptionEntity
+import org.schabi.newpipe.extractor.Info
+import org.schabi.newpipe.extractor.NewPipe
+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.local.subscription.SubscriptionManager
-import org.schabi.newpipe.util.ExtractorHelper
+import org.schabi.newpipe.util.ChannelTabHelper
+import org.schabi.newpipe.util.ExtractorHelper.getChannelInfo
+import org.schabi.newpipe.util.ExtractorHelper.getChannelTab
+import org.schabi.newpipe.util.ExtractorHelper.getMoreChannelTabItems
 import java.time.OffsetDateTime
 import java.time.ZoneOffset
 import java.util.concurrent.atomic.AtomicBoolean
@@ -75,7 +82,9 @@ class FeedLoadManager(private val context: Context) {
          * subscriptions which have not been updated within the feed updated threshold
          */
         val outdatedSubscriptions = when (groupId) {
-            FeedGroupEntity.GROUP_ALL_ID -> feedDatabaseManager.outdatedSubscriptions(outdatedThreshold)
+            FeedGroupEntity.GROUP_ALL_ID -> feedDatabaseManager.outdatedSubscriptions(
+                outdatedThreshold
+            )
             GROUP_NOTIFICATION_ENABLED -> feedDatabaseManager.outdatedSubscriptionsWithNotificationMode(
                 outdatedThreshold, NotificationMode.ENABLED
             )
@@ -101,52 +110,7 @@ class FeedLoadManager(private val context: Context) {
             .runOn(Schedulers.io(), PARALLEL_EXTRACTIONS * 2)
             .filter { !cancelSignal.get() }
             .map { subscriptionEntity ->
-                var error: Throwable? = null
+                loadStreams(subscriptionEntity, useFeedExtractor, defaultSharedPreferences)
-                try {
-                    // check for and load new streams
-                    // either by using the dedicated feed method or by getting the channel info
-                    val listInfo = if (useFeedExtractor) {
-                        ExtractorHelper
-                            .getFeedInfoFallbackToChannelInfo(
-                                subscriptionEntity.serviceId,
-                                subscriptionEntity.url
-                            )
-                            .onErrorReturn {
-                                error = it // store error, otherwise wrapped into RuntimeException
-                                throw it
-                            }
-                            .blockingGet()
-                    } else {
-                        ExtractorHelper
-                            .getChannelInfo(
-                                subscriptionEntity.serviceId,
-                                subscriptionEntity.url,
-                                true
-                            )
-                            .onErrorReturn {
-                                error = it // store error, otherwise wrapped into RuntimeException
-                                throw it
-                            }
-                            .blockingGet()
-                    } as ListInfo<StreamInfoItem>
-
-                    return@map Notification.createOnNext(
-                        FeedUpdateInfo(
-                            subscriptionEntity,
-                            listInfo
-                        )
-                    )
-                } catch (e: Throwable) {
-                    if (error == null) {
-                        // do this to prevent blockingGet() from wrapping into RuntimeException
-                        error = e
-                    }
-
-                    val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
-                    val wrapper =
-                        FeedLoadService.RequestException(subscriptionEntity.uid, request, error!!)
-                    return@map Notification.createOnError<FeedUpdateInfo>(wrapper)
-                }
             }
             .sequential()
             .observeOn(AndroidSchedulers.mainThread())
@@ -164,7 +128,112 @@ class FeedLoadManager(private val context: Context) {
     }
 
     private fun broadcastProgress() {
-        FeedEventManager.postEvent(FeedEventManager.Event.ProgressEvent(currentProgress.get(), maxProgress.get()))
+        FeedEventManager.postEvent(
+            FeedEventManager.Event.ProgressEvent(
+                currentProgress.get(),
+                maxProgress.get()
+            )
+        )
+    }
+
+    private fun loadStreams(
+        subscriptionEntity: SubscriptionEntity,
+        useFeedExtractor: Boolean,
+        defaultSharedPreferences: SharedPreferences
+    ): Notification<FeedUpdateInfo> {
+        var error: Throwable? = null
+        val storeOriginalErrorAndRethrow = { e: Throwable ->
+            // keep original to prevent blockingGet() from wrapping it into RuntimeException
+            error = e
+            throw e
+        }
+
+        try {
+            // check for and load new streams
+            // either by using the dedicated feed method or by getting the channel info
+            var originalInfo: Info? = null
+            var streams: List<StreamInfoItem>? = null
+            val errors = ArrayList<Throwable>()
+
+            if (useFeedExtractor) {
+                NewPipe.getService(subscriptionEntity.serviceId)
+                    .getFeedExtractor(subscriptionEntity.url)
+                    ?.also { feedExtractor ->
+                        // the user wants to use a feed extractor and there is one, use it
+                        val feedInfo = FeedInfo.getInfo(feedExtractor)
+                        errors.addAll(feedInfo.errors)
+                        originalInfo = feedInfo
+                        streams = feedInfo.relatedItems
+                    }
+            }
+
+            if (originalInfo == null) {
+                // use the normal channel tabs extractor if either the user wants it, or
+                // the current service does not have a dedicated feed extractor
+
+                val channelInfo = getChannelInfo(
+                    subscriptionEntity.serviceId,
+                    subscriptionEntity.url, true
+                )
+                    .onErrorReturn(storeOriginalErrorAndRethrow)
+                    .blockingGet()
+                errors.addAll(channelInfo.errors)
+                originalInfo = channelInfo
+
+                streams = channelInfo.tabs
+                    .filter { tab ->
+                        ChannelTabHelper.fetchFeedChannelTab(
+                            context,
+                            defaultSharedPreferences,
+                            tab
+                        )
+                    }
+                    .map {
+                        Pair(
+                            getChannelTab(subscriptionEntity.serviceId, it, true)
+                                .onErrorReturn(storeOriginalErrorAndRethrow)
+                                .blockingGet(),
+                            it
+                        )
+                    }
+                    .flatMap { (channelTabInfo, linkHandler) ->
+                        errors.addAll(channelTabInfo.errors)
+                        if (channelTabInfo.relatedItems.isEmpty() &&
+                            channelTabInfo.nextPage != null
+                        ) {
+                            val infoItemsPage = getMoreChannelTabItems(
+                                subscriptionEntity.serviceId,
+                                linkHandler, channelTabInfo.nextPage
+                            )
+                                .blockingGet()
+
+                            errors.addAll(infoItemsPage.errors)
+                            return@flatMap infoItemsPage.items
+                        } else {
+                            return@flatMap channelTabInfo.relatedItems
+                        }
+                    }
+                    .filterIsInstance<StreamInfoItem>()
+            }
+
+            return Notification.createOnNext(
+                FeedUpdateInfo(
+                    subscriptionEntity,
+                    originalInfo!!,
+                    streams!!,
+                    errors,
+                )
+            )
+        } catch (e: Throwable) {
+            val request = "${subscriptionEntity.serviceId}:${subscriptionEntity.url}"
+            val wrapper = FeedLoadService.RequestException(
+                subscriptionEntity.uid,
+                request,
+                // do this to prevent blockingGet() from wrapping into RuntimeException
+                error ?: e
+            )
+            return Notification.createOnError(wrapper)
+        }
     }
 
     /**
@@ -203,24 +272,24 @@ class FeedLoadManager(private val context: Context) {
                 for (notification in list) {
                     when {
                         notification.isOnNext -> {
-                            val subscriptionId = notification.value!!.uid
+                            val info = notification.value!!
-                            val info = notification.value!!.listInfo
 
-                            notification.value!!.newStreams = filterNewStreams(
+                            notification.value!!.newStreams = filterNewStreams(info.streams)
-                                notification.value!!.listInfo.relatedItems
-                            )
 
-                            feedDatabaseManager.upsertAll(subscriptionId, info.relatedItems)
+                            feedDatabaseManager.upsertAll(info.uid, info.streams)
-                            subscriptionManager.updateFromInfo(subscriptionId, info)
+                            subscriptionManager.updateFromInfo(info.uid, info.originalInfo)
 
                             if (info.errors.isNotEmpty()) {
                                 feedResultsHolder.addErrors(
-                                    FeedLoadService.RequestException.wrapList(
+                                    info.errors.map {
-                                        subscriptionId,
+                                        FeedLoadService.RequestException(
-                                        info
+                                            info.uid,
-                                    )
+                                            "${info.originalInfo.serviceId}:${info.originalInfo.url}",
+                                            it
+                                        )
+                                    }
                                 )
-                                feedDatabaseManager.markAsOutdated(subscriptionId)
+                                feedDatabaseManager.markAsOutdated(info.uid)
                             }
                         }
                         notification.isOnError -> {

app/src/main/java/org/schabi/newpipe/local/feed/service/FeedLoadService.kt

@@ -39,8 +39,6 @@ import org.schabi.newpipe.App
 import org.schabi.newpipe.MainActivity.DEBUG
 import org.schabi.newpipe.R
 import org.schabi.newpipe.database.feed.model.FeedGroupEntity
-import org.schabi.newpipe.extractor.ListInfo
-import org.schabi.newpipe.extractor.stream.StreamInfoItem
 import org.schabi.newpipe.local.feed.service.FeedEventManager.Event.ErrorResultEvent
 import org.schabi.newpipe.local.feed.service.FeedEventManager.postEvent
 import java.util.concurrent.TimeUnit
@@ -126,17 +124,7 @@ class FeedLoadService : Service() {
     // Loading & Handling
     // /////////////////////////////////////////////////////////////////////////
 
-    class RequestException(val subscriptionId: Long, message: String, cause: Throwable) : Exception(message, cause) {
+    class RequestException(val subscriptionId: Long, message: String, cause: Throwable) : Exception(message, cause)
-        companion object {
-            fun wrapList(subscriptionId: Long, info: ListInfo<StreamInfoItem>): List<Throwable> {
-                val toReturn = ArrayList<Throwable>(info.errors.size)
-                info.errors.mapTo(toReturn) {
-                    RequestException(subscriptionId, info.serviceId.toString() + ":" + info.url, it)
-                }
-                return toReturn
-            }
-        }
-    }
 
     // /////////////////////////////////////////////////////////////////////////
     // Notification

app/src/main/java/org/schabi/newpipe/local/feed/service/FeedUpdateInfo.kt

@@ -2,7 +2,7 @@ package org.schabi.newpipe.local.feed.service
 
 import org.schabi.newpipe.database.subscription.NotificationMode
 import org.schabi.newpipe.database.subscription.SubscriptionEntity
-import org.schabi.newpipe.extractor.ListInfo
+import org.schabi.newpipe.extractor.Info
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
 
 data class FeedUpdateInfo(
@@ -11,24 +11,30 @@ data class FeedUpdateInfo(
     val notificationMode: Int,
     val name: String,
     val avatarUrl: String,
-    val listInfo: ListInfo<StreamInfoItem>,
+    val originalInfo: Info,
+    val streams: List<StreamInfoItem>,
+    val errors: List<Throwable>,
 ) {
     constructor(
         subscription: SubscriptionEntity,
-        listInfo: ListInfo<StreamInfoItem>,
+        originalInfo: Info,
+        streams: List<StreamInfoItem>,
+        errors: List<Throwable>,
     ) : this(
         uid = subscription.uid,
         notificationMode = subscription.notificationMode,
         name = subscription.name,
         avatarUrl = subscription.avatarUrl,
-        listInfo = listInfo,
+        originalInfo = originalInfo,
+        streams = streams,
+        errors = errors,
     )
 
     /**
      * Integer id, can be used as notification id, etc.
      */
     val pseudoId: Int
-        get() = listInfo.url.hashCode()
+        get() = originalInfo.url.hashCode()
 
     lateinit var newStreams: List<StreamInfoItem>
 }

app/src/main/java/org/schabi/newpipe/local/history/StatisticsPlaylistFragment.java

@@ -28,14 +28,16 @@ import org.schabi.newpipe.databinding.StatisticPlaylistControlBinding;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+import org.schabi.newpipe.fragments.list.playlist.PlaylistControlViewHolder;
 import org.schabi.newpipe.info_list.dialog.InfoItemDialog;
+import org.schabi.newpipe.info_list.dialog.StreamDialogDefaultEntry;
 import org.schabi.newpipe.local.BaseLocalListFragment;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.player.playqueue.SinglePlayQueue;
 import org.schabi.newpipe.settings.HistorySettingsFragment;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.OnClickGesture;
-import org.schabi.newpipe.info_list.dialog.StreamDialogDefaultEntry;
+import org.schabi.newpipe.util.PlayButtonHelper;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -49,7 +51,8 @@ import io.reactivex.rxjava3.disposables.CompositeDisposable;
 import io.reactivex.rxjava3.disposables.Disposable;
 
 public class StatisticsPlaylistFragment
-        extends BaseLocalListFragment<List<StreamStatisticsEntry>, Void> {
+        extends BaseLocalListFragment<List<StreamStatisticsEntry>, Void>
+        implements PlaylistControlViewHolder {
     private final CompositeDisposable disposables = new CompositeDisposable();
     @State
     Parcelable itemsListState;
@@ -195,14 +198,9 @@ public class StatisticsPlaylistFragment
         if (itemListAdapter != null) {
             itemListAdapter.unsetSelectedListener();
         }
-        if (playlistControlBinding != null) {
-            playlistControlBinding.playlistCtrlPlayBgButton.setOnClickListener(null);
-            playlistControlBinding.playlistCtrlPlayAllButton.setOnClickListener(null);
-            playlistControlBinding.playlistCtrlPlayPopupButton.setOnClickListener(null);
 
-            headerBinding = null;
+        headerBinding = null;
-            playlistControlBinding = null;
+        playlistControlBinding = null;
-        }
 
         if (databaseSubscription != null) {
             databaseSubscription.cancel();
@@ -276,12 +274,8 @@ public class StatisticsPlaylistFragment
             itemsListState = null;
         }
 
-        playlistControlBinding.playlistCtrlPlayAllButton.setOnClickListener(view ->
+        PlayButtonHelper.initPlaylistControlClickListener(activity, playlistControlBinding, this);
-                NavigationHelper.playOnMainPlayer(activity, getPlayQueue()));
+
-        playlistControlBinding.playlistCtrlPlayPopupButton.setOnClickListener(view ->
-                NavigationHelper.playOnPopupPlayer(activity, getPlayQueue(), false));
-        playlistControlBinding.playlistCtrlPlayBgButton.setOnClickListener(view ->
-                NavigationHelper.playOnBackgroundPlayer(activity, getPlayQueue(), false));
         headerBinding.sortButton.setOnClickListener(view -> toggleSortMode());
 
         hideLoading();
@@ -374,7 +368,7 @@ public class StatisticsPlaylistFragment
         }
     }
 
-    private PlayQueue getPlayQueue() {
+    public PlayQueue getPlayQueue() {
         return getPlayQueue(0);
     }
 

app/src/main/java/org/schabi/newpipe/local/playlist/LocalPlaylistFragment.java

@@ -22,7 +22,6 @@ import android.widget.Toast;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.appcompat.app.AlertDialog;
-import androidx.preference.PreferenceManager;
 import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.RecyclerView;
 import androidx.viewbinding.ViewBinding;
@@ -42,17 +41,18 @@ import org.schabi.newpipe.databinding.PlaylistControlBinding;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+import org.schabi.newpipe.fragments.list.playlist.PlaylistControlViewHolder;
 import org.schabi.newpipe.info_list.dialog.InfoItemDialog;
 import org.schabi.newpipe.info_list.dialog.StreamDialogDefaultEntry;
 import org.schabi.newpipe.local.BaseLocalListFragment;
 import org.schabi.newpipe.local.history.HistoryRecordManager;
-import org.schabi.newpipe.player.PlayerType;
 import org.schabi.newpipe.player.playqueue.PlayQueue;
 import org.schabi.newpipe.player.playqueue.SinglePlayQueue;
 import org.schabi.newpipe.util.Localization;
 import org.schabi.newpipe.util.NavigationHelper;
 import org.schabi.newpipe.util.OnClickGesture;
 import org.schabi.newpipe.util.external_communication.ShareUtils;
+import org.schabi.newpipe.util.PlayButtonHelper;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -69,7 +69,8 @@ import io.reactivex.rxjava3.disposables.Disposable;
 import io.reactivex.rxjava3.schedulers.Schedulers;
 import io.reactivex.rxjava3.subjects.PublishSubject;
 
-public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistStreamEntry>, Void> {
+public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistStreamEntry>, Void>
+        implements PlaylistControlViewHolder {
     // Save the list 10 seconds after the last change occurred
     private static final long SAVE_DEBOUNCE_MILLIS = 10000;
     private static final int MINIMUM_INITIAL_DRAG_VELOCITY = 12;
@@ -265,14 +266,10 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         if (itemListAdapter != null) {
             itemListAdapter.unsetSelectedListener();
         }
-        if (playlistControlBinding != null) {
-            playlistControlBinding.playlistCtrlPlayBgButton.setOnClickListener(null);
-            playlistControlBinding.playlistCtrlPlayAllButton.setOnClickListener(null);
-            playlistControlBinding.playlistCtrlPlayPopupButton.setOnClickListener(null);
 
-            headerBinding = null;
+        headerBinding = null;
-            playlistControlBinding = null;
+        playlistControlBinding = null;
-        }
+
 
         if (databaseSubscription != null) {
             databaseSubscription.cancel();
@@ -498,38 +495,11 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         }
         setVideoCount(itemListAdapter.getItemsList().size());
 
-        playlistControlBinding.playlistCtrlPlayAllButton.setOnClickListener(view -> {
+        PlayButtonHelper.initPlaylistControlClickListener(activity, playlistControlBinding, this);
-            NavigationHelper.playOnMainPlayer(activity, getPlayQueue());
-            showHoldToAppendTipIfNeeded();
-        });
-        playlistControlBinding.playlistCtrlPlayPopupButton.setOnClickListener(view -> {
-            NavigationHelper.playOnPopupPlayer(activity, getPlayQueue(), false);
-            showHoldToAppendTipIfNeeded();
-        });
-        playlistControlBinding.playlistCtrlPlayBgButton.setOnClickListener(view -> {
-            NavigationHelper.playOnBackgroundPlayer(activity, getPlayQueue(), false);
-            showHoldToAppendTipIfNeeded();
-        });
-        playlistControlBinding.playlistCtrlPlayPopupButton.setOnLongClickListener(view -> {
-            NavigationHelper.enqueueOnPlayer(activity, getPlayQueue(), PlayerType.POPUP);
-            return true;
-        });
-
-        playlistControlBinding.playlistCtrlPlayBgButton.setOnLongClickListener(view -> {
-            NavigationHelper.enqueueOnPlayer(activity, getPlayQueue(), PlayerType.AUDIO);
-            return true;
-        });
 
         hideLoading();
     }
 
-    private void showHoldToAppendTipIfNeeded() {
-        if (PreferenceManager.getDefaultSharedPreferences(activity)
-                .getBoolean(getString(R.string.show_hold_to_append_key), true)) {
-            Toast.makeText(activity, R.string.hold_to_append, Toast.LENGTH_SHORT).show();
-        }
-    }
-
     ///////////////////////////////////////////////////////////////////////////
     // Fragment Error Handling
     ///////////////////////////////////////////////////////////////////////////
@@ -853,7 +823,7 @@ public class LocalPlaylistFragment extends BaseLocalListFragment<List<PlaylistSt
         }
     }
 
-    private PlayQueue getPlayQueue() {
+    public PlayQueue getPlayQueue() {
         return getPlayQueue(0);
     }
 

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

@@ -1,6 +1,7 @@
 package org.schabi.newpipe.local.subscription
 
 import android.content.Context
+import android.util.Pair
 import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
 import io.reactivex.rxjava3.core.Completable
 import io.reactivex.rxjava3.core.Flowable
@@ -11,8 +12,9 @@ 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
+import org.schabi.newpipe.extractor.Info
 import org.schabi.newpipe.extractor.channel.ChannelInfo
+import org.schabi.newpipe.extractor.channel.tabs.ChannelTabInfo
 import org.schabi.newpipe.extractor.feed.FeedInfo
 import org.schabi.newpipe.extractor.stream.StreamInfoItem
 import org.schabi.newpipe.local.feed.FeedDatabaseManager
@@ -46,28 +48,33 @@ class SubscriptionManager(context: Context) {
         }
     }
 
-    fun upsertAll(infoList: List<ChannelInfo>): List<SubscriptionEntity> {
+    fun upsertAll(infoList: List<Pair<ChannelInfo, List<ChannelTabInfo>>>): List<SubscriptionEntity> {
         val listEntities = subscriptionTable.upsertAll(
-            infoList.map { SubscriptionEntity.from(it) }
+            infoList.map { SubscriptionEntity.from(it.first) }
         )
 
         database.runInTransaction {
             infoList.forEachIndexed { index, info ->
-                feedDatabaseManager.upsertAll(listEntities[index].uid, info.relatedItems)
+                info.second.forEach {
+                    feedDatabaseManager.upsertAll(
+                        listEntities[index].uid,
+                        it.relatedItems.filterIsInstance<StreamInfoItem>()
+                    )
+                }
             }
         }
 
         return listEntities
     }
 
-    fun updateChannelInfo(info: ChannelInfo): Completable = subscriptionTable.getSubscription(info.serviceId, info.url)
+    fun updateChannelInfo(info: ChannelInfo): Completable =
-        .flatMapCompletable {
+        subscriptionTable.getSubscription(info.serviceId, info.url)
-            Completable.fromRunnable {
+            .flatMapCompletable {
-                it.setData(info.name, info.avatarUrl, info.description, info.subscriberCount)
+                Completable.fromRunnable {
-                subscriptionTable.update(it)
+                    it.setData(info.name, info.avatarUrl, info.description, info.subscriberCount)
-                feedDatabaseManager.upsertAll(it.uid, info.relatedItems)
+                    subscriptionTable.update(it)
+                }
             }
-        }
 
     fun updateNotificationMode(serviceId: Int, url: String, @NotificationMode mode: Int): Completable {
         return subscriptionTable().getSubscription(serviceId, url)
@@ -84,7 +91,7 @@ class SubscriptionManager(context: Context) {
             }
     }
 
-    fun updateFromInfo(subscriptionId: Long, info: ListInfo<StreamInfoItem>) {
+    fun updateFromInfo(subscriptionId: Long, info: Info) {
         val subscriptionEntity = subscriptionTable.getSubscription(subscriptionId)
 
         if (info is FeedInfo) {
@@ -107,11 +114,8 @@ class SubscriptionManager(context: Context) {
             .observeOn(AndroidSchedulers.mainThread())
     }
 
-    fun insertSubscription(subscriptionEntity: SubscriptionEntity, info: ChannelInfo) {
+    fun insertSubscription(subscriptionEntity: SubscriptionEntity) {
-        database.runInTransaction {
+        subscriptionTable.insert(subscriptionEntity)
-            val subscriptionId = subscriptionTable.insert(subscriptionEntity)
-            feedDatabaseManager.upsertAll(subscriptionId, info.relatedItems)
-        }
     }
 
     fun deleteSubscription(subscriptionEntity: SubscriptionEntity) {
@@ -125,7 +129,10 @@ class SubscriptionManager(context: Context) {
      */
     private fun rememberAllStreams(subscription: SubscriptionEntity): Completable {
         return ExtractorHelper.getChannelInfo(subscription.serviceId, subscription.url, false)
-            .map { channel -> channel.relatedItems.map { stream -> StreamEntity(stream) } }
+            .flatMap { info ->
+                ExtractorHelper.getChannelTab(subscription.serviceId, info.tabs.first(), false)
+            }
+            .map { channel -> channel.relatedItems.filterIsInstance<StreamInfoItem>().map { stream -> StreamEntity(stream) } }
             .flatMapCompletable { entities ->
                 Completable.fromAction {
                     database.streamDAO().upsertAll(entities)

app/src/main/java/org/schabi/newpipe/local/subscription/services/SubscriptionsImportService.java

@@ -26,6 +26,7 @@ import android.content.Intent;
 import android.net.Uri;
 import android.text.TextUtils;
 import android.util.Log;
+import android.util.Pair;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -38,6 +39,7 @@ import org.schabi.newpipe.R;
 import org.schabi.newpipe.database.subscription.SubscriptionEntity;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.channel.ChannelInfo;
+import org.schabi.newpipe.extractor.channel.tabs.ChannelTabInfo;
 import org.schabi.newpipe.extractor.subscription.SubscriptionItem;
 import org.schabi.newpipe.ktx.ExceptionUtils;
 import org.schabi.newpipe.streams.io.SharpInputStream;
@@ -48,6 +50,7 @@ import org.schabi.newpipe.util.ExtractorHelper;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
 
@@ -199,12 +202,19 @@ public class SubscriptionsImportService extends BaseImportExportService {
 
                 .parallel(PARALLEL_EXTRACTIONS)
                 .runOn(Schedulers.io())
-                .map((Function<SubscriptionItem, Notification<ChannelInfo>>) subscriptionItem -> {
+                .map((Function<SubscriptionItem, Notification<Pair<ChannelInfo,
+                        List<ChannelTabInfo>>>>) subscriptionItem -> {
                     try {
-                        return Notification.createOnNext(ExtractorHelper
+                        final ChannelInfo channelInfo = ExtractorHelper
                                 .getChannelInfo(subscriptionItem.getServiceId(),
                                         subscriptionItem.getUrl(), true)
-                                .blockingGet());
+                                .blockingGet();
+                        return Notification.createOnNext(new Pair<>(channelInfo,
+                                Collections.singletonList(
+                                        ExtractorHelper.getChannelTab(
+                                                subscriptionItem.getServiceId(),
+                                                channelInfo.getTabs().get(0), true).blockingGet()
+                                )));
                     } catch (final Throwable e) {
                         return Notification.createOnError(e);
                     }
@@ -223,7 +233,7 @@ public class SubscriptionsImportService extends BaseImportExportService {
     }
 
     private Subscriber<List<SubscriptionEntity>> getSubscriber() {
-        return new Subscriber<List<SubscriptionEntity>>() {
+        return new Subscriber<>() {
             @Override
             public void onSubscribe(final Subscription s) {
                 subscription = s;
@@ -254,10 +264,11 @@ public class SubscriptionsImportService extends BaseImportExportService {
         };
     }
 
-    private Consumer<Notification<ChannelInfo>> getNotificationsConsumer() {
+    private Consumer<Notification<Pair<ChannelInfo,
+            List<ChannelTabInfo>>>> getNotificationsConsumer() {
         return notification -> {
             if (notification.isOnNext()) {
-                final String name = notification.getValue().getName();
+                final String name = notification.getValue().first.getName();
                 eventListener.onItemCompleted(!TextUtils.isEmpty(name) ? name : "");
             } else if (notification.isOnError()) {
                 final Throwable error = notification.getError();
@@ -275,10 +286,12 @@ public class SubscriptionsImportService extends BaseImportExportService {
         };
     }
 
-    private Function<List<Notification<ChannelInfo>>, List<SubscriptionEntity>> upsertBatch() {
+    private Function<List<Notification<Pair<ChannelInfo, List<ChannelTabInfo>>>>,
+            List<SubscriptionEntity>> upsertBatch() {
         return notificationList -> {
-            final List<ChannelInfo> infoList = new ArrayList<>(notificationList.size());
+            final List<Pair<ChannelInfo, List<ChannelTabInfo>>> infoList =
-            for (final Notification<ChannelInfo> n : notificationList) {
+                    new ArrayList<>(notificationList.size());
+            for (final Notification<Pair<ChannelInfo, List<ChannelTabInfo>>> n : notificationList) {
                 if (n.isOnNext()) {
                     infoList.add(n.getValue());
                 }

app/src/main/java/org/schabi/newpipe/player/playqueue/AbstractInfoPlayQueue.java

@@ -4,6 +4,7 @@ import android.util.Log;
 
 import androidx.annotation.NonNull;
 
+import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.ListInfo;
 import org.schabi.newpipe.extractor.Page;
@@ -15,7 +16,7 @@ import java.util.stream.Collectors;
 import io.reactivex.rxjava3.core.SingleObserver;
 import io.reactivex.rxjava3.disposables.Disposable;
 
-abstract class AbstractInfoPlayQueue<T extends ListInfo<StreamInfoItem>>
+abstract class AbstractInfoPlayQueue<T extends ListInfo<? extends InfoItem>>
         extends PlayQueue {
     boolean isInitial;
     private boolean isComplete;
@@ -27,7 +28,13 @@ abstract class AbstractInfoPlayQueue<T extends ListInfo<StreamInfoItem>>
     private transient Disposable fetchReactor;
 
     protected AbstractInfoPlayQueue(final T info) {
-        this(info.getServiceId(), info.getUrl(), info.getNextPage(), info.getRelatedItems(), 0);
+        this(info.getServiceId(), info.getUrl(), info.getNextPage(),
+                info.getRelatedItems()
+                        .stream()
+                        .filter(StreamInfoItem.class::isInstance)
+                        .map(StreamInfoItem.class::cast)
+                        .collect(Collectors.toList()),
+                0);
     }
 
     protected AbstractInfoPlayQueue(final int serviceId,
@@ -72,7 +79,11 @@ abstract class AbstractInfoPlayQueue<T extends ListInfo<StreamInfoItem>>
                 }
                 nextPage = result.getNextPage();
 
-                append(extractListItems(result.getRelatedItems()));
+                append(extractListItems(result.getRelatedItems()
+                        .stream()
+                        .filter(StreamInfoItem.class::isInstance)
+                        .map(StreamInfoItem.class::cast)
+                        .collect(Collectors.toList())));
 
                 fetchReactor.dispose();
                 fetchReactor = null;
@@ -87,7 +98,7 @@ abstract class AbstractInfoPlayQueue<T extends ListInfo<StreamInfoItem>>
         };
     }
 
-    SingleObserver<ListExtractor.InfoItemsPage<StreamInfoItem>> getNextPageObserver() {
+    SingleObserver<ListExtractor.InfoItemsPage<? extends InfoItem>> getNextPageObserver() {
         return new SingleObserver<>() {
             @Override
             public void onSubscribe(@NonNull final Disposable d) {
@@ -101,13 +112,17 @@ abstract class AbstractInfoPlayQueue<T extends ListInfo<StreamInfoItem>>
 
             @Override
             public void onSuccess(
-                    @NonNull final ListExtractor.InfoItemsPage<StreamInfoItem> result) {
+                    @NonNull final ListExtractor.InfoItemsPage<? extends InfoItem> result) {
                 if (!result.hasNextPage()) {
                     isComplete = true;
                 }
                 nextPage = result.getNextPage();
 
-                append(extractListItems(result.getItems()));
+                append(extractListItems(result.getItems()
+                        .stream()
+                        .filter(StreamInfoItem.class::isInstance)
+                        .map(StreamInfoItem.class::cast)
+                        .collect(Collectors.toList())));
 
                 fetchReactor.dispose();
                 fetchReactor = null;

app/src/main/java/org/schabi/newpipe/player/playqueue/ChannelPlayQueue.java

@@ -1,47 +0,0 @@
-package org.schabi.newpipe.player.playqueue;
-
-
-import org.schabi.newpipe.extractor.Page;
-import org.schabi.newpipe.extractor.channel.ChannelInfo;
-import org.schabi.newpipe.extractor.stream.StreamInfoItem;
-import org.schabi.newpipe.util.ExtractorHelper;
-
-import java.util.List;
-
-import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
-import io.reactivex.rxjava3.schedulers.Schedulers;
-
-public final class ChannelPlayQueue extends AbstractInfoPlayQueue<ChannelInfo> {
-
-    public ChannelPlayQueue(final ChannelInfo info) {
-        super(info);
-    }
-
-    public ChannelPlayQueue(final int serviceId,
-                            final String url,
-                            final Page nextPage,
-                            final List<StreamInfoItem> streams,
-                            final int index) {
-        super(serviceId, url, nextPage, streams, index);
-    }
-
-    @Override
-    protected String getTag() {
-        return "ChannelPlayQueue@" + Integer.toHexString(hashCode());
-    }
-
-    @Override
-    public void fetch() {
-        if (this.isInitial) {
-            ExtractorHelper.getChannelInfo(this.serviceId, this.baseUrl, false)
-                    .subscribeOn(Schedulers.io())
-                    .observeOn(AndroidSchedulers.mainThread())
-                    .subscribe(getHeadListObserver());
-        } else {
-            ExtractorHelper.getMoreChannelItems(this.serviceId, this.baseUrl, this.nextPage)
-                    .subscribeOn(Schedulers.io())
-                    .observeOn(AndroidSchedulers.mainThread())
-                    .subscribe(getNextPageObserver());
-        }
-    }
-}

app/src/main/java/org/schabi/newpipe/player/playqueue/ChannelTabPlayQueue.java

@@ -0,0 +1,53 @@
+package org.schabi.newpipe.player.playqueue;
+
+
+import org.schabi.newpipe.extractor.Page;
+import org.schabi.newpipe.extractor.channel.tabs.ChannelTabInfo;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.stream.StreamInfoItem;
+import org.schabi.newpipe.util.ExtractorHelper;
+
+import java.util.Collections;
+import java.util.List;
+
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
+import io.reactivex.rxjava3.schedulers.Schedulers;
+
+public final class ChannelTabPlayQueue extends AbstractInfoPlayQueue<ChannelTabInfo> {
+
+    final ListLinkHandler linkHandler;
+
+    public ChannelTabPlayQueue(final int serviceId,
+                               final ListLinkHandler linkHandler,
+                               final Page nextPage,
+                               final List<StreamInfoItem> streams,
+                               final int index) {
+        super(serviceId, linkHandler.getUrl(), nextPage, streams, index);
+        this.linkHandler = linkHandler;
+    }
+
+    public ChannelTabPlayQueue(final int serviceId,
+                               final ListLinkHandler linkHandler) {
+        this(serviceId, linkHandler, null, Collections.emptyList(), 0);
+    }
+
+    @Override
+    protected String getTag() {
+        return "ChannelTabPlayQueue@" + Integer.toHexString(hashCode());
+    }
+
+    @Override
+    public void fetch() {
+        if (isInitial) {
+            ExtractorHelper.getChannelTab(this.serviceId, this.linkHandler, false)
+                    .subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(getHeadListObserver());
+        } else {
+            ExtractorHelper.getMoreChannelTabItems(this.serviceId, this.linkHandler, this.nextPage)
+                    .subscribeOn(Schedulers.io())
+                    .observeOn(AndroidSchedulers.mainThread())
+                    .subscribe(getNextPageObserver());
+        }
+    }
+}

app/src/main/java/org/schabi/newpipe/settings/NewPipeSettings.java

@@ -44,21 +44,11 @@ public final class NewPipeSettings {
     private NewPipeSettings() { }
 
     public static void initSettings(final Context context) {
-        // check if there are entries in the prefs to determine whether this is the first app run
+        // check if the last used preference version is set
-        Boolean isFirstRun = null;
+        // to determine whether this is the first app run
-        final Set<String> prefsKeys = PreferenceManager.getDefaultSharedPreferences(context)
+        final int lastUsedPrefVersion = PreferenceManager.getDefaultSharedPreferences(context)
-                .getAll().keySet();
+                .getInt(context.getString(R.string.last_used_preferences_version), -1);
-        for (final String key: prefsKeys) {
+        final boolean isFirstRun = lastUsedPrefVersion == -1;
-            // ACRA stores some info in the prefs during app initialization
-            // which happens before this method is called. Therefore ignore ACRA-related keys.
-            if (!key.toLowerCase().startsWith("acra")) {
-                isFirstRun = false;
-                break;
-            }
-        }
-        if (isFirstRun == null) {
-            isFirstRun = true;
-        }
 
         // first run migrations, then setDefaultValues, since the latter requires the correct types
         SettingMigrations.runMigrationsIfNeeded(context, isFirstRun);

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

@@ -0,0 +1,151 @@
+package org.schabi.newpipe.util;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+import androidx.annotation.StringRes;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.extractor.channel.tabs.ChannelTabs;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+
+import java.util.List;
+import java.util.Set;
+
+public final class ChannelTabHelper {
+    private ChannelTabHelper() {
+    }
+
+    /**
+     * @param tab the channel tab to check
+     * @return whether the tab should contain (playable) streams or not
+     */
+    public static boolean isStreamsTab(final String tab) {
+        switch (tab) {
+            case ChannelTabs.VIDEOS:
+            case ChannelTabs.TRACKS:
+            case ChannelTabs.SHORTS:
+            case ChannelTabs.LIVESTREAMS:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    /**
+     * @param tab the channel tab link handler to check
+     * @return whether the tab should contain (playable) streams or not
+     */
+    public static boolean isStreamsTab(final ListLinkHandler tab) {
+        final List<String> contentFilters = tab.getContentFilters();
+        if (contentFilters.isEmpty()) {
+            return false; // this should never happen, but check just to be sure
+        } else {
+            return isStreamsTab(contentFilters.get(0));
+        }
+    }
+
+    @StringRes
+    private static int getShowTabKey(final String tab) {
+        switch (tab) {
+            case ChannelTabs.VIDEOS:
+                return R.string.show_channel_tabs_videos;
+            case ChannelTabs.TRACKS:
+                return R.string.show_channel_tabs_tracks;
+            case ChannelTabs.SHORTS:
+                return R.string.show_channel_tabs_shorts;
+            case ChannelTabs.LIVESTREAMS:
+                return R.string.show_channel_tabs_livestreams;
+            case ChannelTabs.CHANNELS:
+                return R.string.show_channel_tabs_channels;
+            case ChannelTabs.PLAYLISTS:
+                return R.string.show_channel_tabs_playlists;
+            case ChannelTabs.ALBUMS:
+                return R.string.show_channel_tabs_albums;
+            default:
+                return -1;
+        }
+    }
+
+    @StringRes
+    private static int getFetchFeedTabKey(final String tab) {
+        switch (tab) {
+            case ChannelTabs.VIDEOS:
+                return R.string.fetch_channel_tabs_videos;
+            case ChannelTabs.TRACKS:
+                return R.string.fetch_channel_tabs_tracks;
+            case ChannelTabs.SHORTS:
+                return R.string.fetch_channel_tabs_shorts;
+            case ChannelTabs.LIVESTREAMS:
+                return R.string.fetch_channel_tabs_livestreams;
+            default:
+                return -1;
+        }
+    }
+
+    @StringRes
+    public static int getTranslationKey(final String tab) {
+        switch (tab) {
+            case ChannelTabs.VIDEOS:
+                return R.string.channel_tab_videos;
+            case ChannelTabs.TRACKS:
+                return R.string.channel_tab_tracks;
+            case ChannelTabs.SHORTS:
+                return R.string.channel_tab_shorts;
+            case ChannelTabs.LIVESTREAMS:
+                return R.string.channel_tab_livestreams;
+            case ChannelTabs.CHANNELS:
+                return R.string.channel_tab_channels;
+            case ChannelTabs.PLAYLISTS:
+                return R.string.channel_tab_playlists;
+            case ChannelTabs.ALBUMS:
+                return R.string.channel_tab_albums;
+            default:
+                return R.string.unknown_content;
+        }
+    }
+
+    public static boolean showChannelTab(final Context context,
+                                         final SharedPreferences sharedPreferences,
+                                         @StringRes final int key) {
+        final Set<String> enabledTabs = sharedPreferences.getStringSet(
+                context.getString(R.string.show_channel_tabs_key), null);
+        if (enabledTabs == null) {
+            return true; // default to true
+        } else {
+            return enabledTabs.contains(context.getString(key));
+        }
+    }
+
+    public static boolean showChannelTab(final Context context,
+                                         final SharedPreferences sharedPreferences,
+                                         final String tab) {
+        final int key = ChannelTabHelper.getShowTabKey(tab);
+        if (key == -1) {
+            return false;
+        }
+        return showChannelTab(context, sharedPreferences, key);
+    }
+
+    public static boolean fetchFeedChannelTab(final Context context,
+                                              final SharedPreferences sharedPreferences,
+                                              final ListLinkHandler tab) {
+        final List<String> contentFilters = tab.getContentFilters();
+        if (contentFilters.isEmpty()) {
+            return false; // this should never happen, but check just to be sure
+        }
+
+        final int key = ChannelTabHelper.getFetchFeedTabKey(contentFilters.get(0));
+        if (key == -1) {
+            return false;
+        }
+
+        final Set<String> enabledTabs = sharedPreferences.getStringSet(
+                context.getString(R.string.feed_fetch_channel_tabs_key), null);
+        if (enabledTabs == null) {
+            return true; // default to true
+        } else {
+            return enabledTabs.contains(context.getString(key));
+        }
+    }
+}

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

@@ -36,17 +36,15 @@ import org.schabi.newpipe.R;
 import org.schabi.newpipe.extractor.Info;
 import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.ListExtractor.InfoItemsPage;
-import org.schabi.newpipe.extractor.ListInfo;
 import org.schabi.newpipe.extractor.MetaInfo;
 import org.schabi.newpipe.extractor.NewPipe;
 import org.schabi.newpipe.extractor.Page;
-import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.channel.ChannelInfo;
+import org.schabi.newpipe.extractor.channel.tabs.ChannelTabInfo;
 import org.schabi.newpipe.extractor.comments.CommentsInfo;
 import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
-import org.schabi.newpipe.extractor.feed.FeedExtractor;
-import org.schabi.newpipe.extractor.feed.FeedInfo;
 import org.schabi.newpipe.extractor.kiosk.KioskInfo;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
 import org.schabi.newpipe.extractor.playlist.PlaylistInfo;
 import org.schabi.newpipe.extractor.search.SearchInfo;
 import org.schabi.newpipe.extractor.stream.StreamInfo;
@@ -127,28 +125,24 @@ public final class ExtractorHelper {
                         ChannelInfo.getInfo(NewPipe.getService(serviceId), url)));
     }
 
-    public static Single<InfoItemsPage<StreamInfoItem>> getMoreChannelItems(final int serviceId,
+    public static Single<ChannelTabInfo> getChannelTab(final int serviceId,
-                                                                            final String url,
+                                                       final ListLinkHandler listLinkHandler,
-                                                                            final Page nextPage) {
+                                                       final boolean forceLoad) {
         checkServiceId(serviceId);
-        return Single.fromCallable(() ->
+        return checkCache(forceLoad, serviceId,
-                ChannelInfo.getMoreItems(NewPipe.getService(serviceId), url, nextPage));
+                listLinkHandler.getUrl(), InfoItem.InfoType.CHANNEL,
+                Single.fromCallable(() ->
+                        ChannelTabInfo.getInfo(NewPipe.getService(serviceId), listLinkHandler)));
     }
 
-    public static Single<ListInfo<StreamInfoItem>> getFeedInfoFallbackToChannelInfo(
+    public static Single<InfoItemsPage<InfoItem>> getMoreChannelTabItems(
-            final int serviceId, final String url) {
+            final int serviceId,
-        final Maybe<ListInfo<StreamInfoItem>> maybeFeedInfo = Maybe.fromCallable(() -> {
+            final ListLinkHandler listLinkHandler,
-            final StreamingService service = NewPipe.getService(serviceId);
+            final Page nextPage) {
-            final FeedExtractor feedExtractor = service.getFeedExtractor(url);
+        checkServiceId(serviceId);
-
+        return Single.fromCallable(() ->
-            if (feedExtractor == null) {
+                ChannelTabInfo.getMoreItems(NewPipe.getService(serviceId),
-                return null;
+                        listLinkHandler, nextPage));
-            }
-
-            return FeedInfo.getInfo(feedExtractor);
-        });
-
-        return maybeFeedInfo.switchIfEmpty(getChannelInfo(serviceId, url, true));
     }
 
     public static Single<CommentsInfo> getCommentsInfo(final int serviceId, final String url,
@@ -229,7 +223,7 @@ public final class ExtractorHelper {
             load = actualLoadFromNetwork;
         } else {
             load = Maybe.concat(ExtractorHelper.loadFromCache(serviceId, url, infoType),
-                    actualLoadFromNetwork.toMaybe())
+                            actualLoadFromNetwork.toMaybe())
                     .firstElement() // Take the first valid
                     .toSingle();
         }
@@ -240,10 +234,10 @@ public final class ExtractorHelper {
     /**
      * Default implementation uses the {@link InfoCache} to get cached results.
      *
-     * @param <I>             the item type's class that extends {@link Info}
+     * @param <I>       the item type's class that extends {@link Info}
-     * @param serviceId       the service to load from
+     * @param serviceId the service to load from
-     * @param url             the URL to load
+     * @param url       the URL to load
-     * @param infoType        the {@link InfoItem.InfoType} of the item
+     * @param infoType  the {@link InfoItem.InfoType} of the item
      * @return a {@link Single} that loads the item
      */
     private static <I extends Info> Maybe<I> loadFromCache(final int serviceId, final String url,
@@ -274,11 +268,12 @@ public final class ExtractorHelper {
      * Formats the text contained in the meta info list as HTML and puts it into the text view,
      * while also making the separator visible. If the list is null or empty, or the user chose not
      * to see meta information, both the text view and the separator are hidden
-     * @param metaInfos a list of meta information, can be null or empty
+     *
-     * @param metaInfoTextView the text view in which to show the formatted HTML
+     * @param metaInfos         a list of meta information, can be null or empty
+     * @param metaInfoTextView  the text view in which to show the formatted HTML
      * @param metaInfoSeparator another view to be shown or hidden accordingly to the text view
-     * @param disposables disposables created by the method are added here and their lifecycle
+     * @param disposables       disposables created by the method are added here and their lifecycle
-     *                    should be handled by the calling class
+     *                          should be handled by the calling class
      */
     public static void showMetaInfoInTextView(@Nullable final List<MetaInfo> metaInfos,
                                               final TextView metaInfoTextView,
@@ -287,7 +282,7 @@ public final class ExtractorHelper {
         final Context context = metaInfoTextView.getContext();
         if (metaInfos == null || metaInfos.isEmpty()
                 || !PreferenceManager.getDefaultSharedPreferences(context).getBoolean(
-                        context.getString(R.string.show_meta_info_key), true)) {
+                context.getString(R.string.show_meta_info_key), true)) {
             metaInfoTextView.setVisibility(View.GONE);
             metaInfoSeparator.setVisibility(View.GONE);
 

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

@@ -0,0 +1,90 @@
+package org.schabi.newpipe.util;
+
+import android.content.Context;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.preference.PreferenceManager;
+
+import org.schabi.newpipe.R;
+import org.schabi.newpipe.databinding.PlaylistControlBinding;
+import org.schabi.newpipe.fragments.list.playlist.PlaylistControlViewHolder;
+import org.schabi.newpipe.player.PlayerType;
+
+/**
+ * Utility class for play buttons and their respective click listeners.
+ */
+public final class PlayButtonHelper {
+
+    private PlayButtonHelper() {
+        // utility class
+    }
+
+    /**
+     * Initialize {@link android.view.View.OnClickListener OnClickListener}
+     * and {@link android.view.View.OnLongClickListener OnLongClickListener} for playlist control
+     * buttons defined in {@link R.layout#playlist_control}.
+     *
+     * @param activity The activity to use for the {@link android.widget.Toast Toast}.
+     * @param playlistControlBinding The binding of the
+     *        {@link R.layout#playlist_control playlist control layout}.
+     * @param fragment The fragment to get the play queue from.
+     */
+    public static void initPlaylistControlClickListener(
+            @NonNull final AppCompatActivity activity,
+            @NonNull final PlaylistControlBinding playlistControlBinding,
+            @NonNull final PlaylistControlViewHolder fragment) {
+        // click listener
+        playlistControlBinding.playlistCtrlPlayAllButton.setOnClickListener(view -> {
+            NavigationHelper.playOnMainPlayer(activity, fragment.getPlayQueue());
+            showHoldToAppendToastIfNeeded(activity);
+        });
+        playlistControlBinding.playlistCtrlPlayPopupButton.setOnClickListener(view -> {
+            NavigationHelper.playOnPopupPlayer(activity, fragment.getPlayQueue(), false);
+            showHoldToAppendToastIfNeeded(activity);
+        });
+        playlistControlBinding.playlistCtrlPlayBgButton.setOnClickListener(view -> {
+            NavigationHelper.playOnBackgroundPlayer(activity, fragment.getPlayQueue(), false);
+            showHoldToAppendToastIfNeeded(activity);
+        });
+
+        // long click listener
+        playlistControlBinding.playlistCtrlPlayPopupButton.setOnLongClickListener(view -> {
+            NavigationHelper.enqueueOnPlayer(activity, fragment.getPlayQueue(), PlayerType.POPUP);
+            return true;
+        });
+        playlistControlBinding.playlistCtrlPlayBgButton.setOnLongClickListener(view -> {
+            NavigationHelper.enqueueOnPlayer(activity, fragment.getPlayQueue(), PlayerType.AUDIO);
+            return true;
+        });
+    }
+
+    /**
+     * Show the "hold to append" toast if the corresponding preference is enabled.
+     *
+     * @param context The context to show the toast.
+     */
+    private static void showHoldToAppendToastIfNeeded(@NonNull final Context context) {
+        if (shouldShowHoldToAppendTip(context)) {
+            Toast.makeText(context, R.string.hold_to_append, Toast.LENGTH_SHORT).show();
+        }
+
+    }
+
+    /**
+     * Check if the "hold to append" toast should be shown.
+     *
+     * <p>
+     * The tip is shown if the corresponding preference is enabled.
+     * This is the default behaviour.
+     * </p>
+     *
+     * @param context The context to get the preference.
+     * @return {@code true} if the tip should be shown, {@code false} otherwise.
+     */
+    public static boolean shouldShowHoldToAppendTip(@NonNull final Context context) {
+        return PreferenceManager.getDefaultSharedPreferences(context)
+                .getBoolean(context.getString(R.string.show_hold_to_append_key), true);
+    }
+}

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

@@ -1,131 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout 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="wrap_content"
-    android:background="?attr/contrast_background_color">
-
-    <RelativeLayout
-        android:id="@+id/channel_metadata"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content">
-
-        <ImageView
-            android:id="@+id/channel_banner_image"
-            android:layout_width="match_parent"
-            android:layout_height="70dp"
-            android:background="@android:color/black"
-            android:fitsSystemWindows="true"
-            android:scaleType="fitCenter"
-            android:src="@drawable/placeholder_channel_banner"
-            tools:ignore="ContentDescription" />
-
-        <FrameLayout
-            android:id="@+id/avatars_layout"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginLeft="8dp"
-            android:layout_marginTop="50dp">
-
-            <com.google.android.material.imageview.ShapeableImageView
-                android:id="@+id/channel_avatar_view"
-                android:layout_width="@dimen/channel_avatar_size"
-                android:layout_height="@dimen/channel_avatar_size"
-                android:padding="1dp"
-                android:src="@drawable/placeholder_person"
-                app:shapeAppearance="@style/CircularImageView"
-                app:strokeColor="#ffffff"
-                app:strokeWidth="2dp" />
-
-            <com.google.android.material.imageview.ShapeableImageView
-                android:id="@+id/sub_channel_avatar_view"
-                android:layout_width="@dimen/sub_channel_avatar_size"
-                android:layout_height="@dimen/sub_channel_avatar_size"
-                android:layout_gravity="bottom|right"
-                android:padding="1dp"
-                android:src="@drawable/placeholder_person"
-                android:visibility="gone"
-                app:shapeAppearance="@style/CircularImageView"
-                app:strokeColor="#ffffff"
-                app:strokeWidth="2dp"
-                tools:ignore="RtlHardcoded"
-                tools:visibility="visible" />
-        </FrameLayout>
-
-        <org.schabi.newpipe.views.NewPipeTextView
-            android:id="@+id/channel_title_view"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_below="@id/channel_banner_image"
-            android:layout_marginLeft="8dp"
-            android:layout_marginTop="6dp"
-            android:layout_marginRight="8dp"
-            android:layout_toLeftOf="@id/channel_subscribe_button"
-            android:layout_toRightOf="@id/avatars_layout"
-            android:ellipsize="end"
-            android:lines="1"
-            android:textAppearance="?android:attr/textAppearanceLarge"
-            android:textSize="@dimen/video_item_detail_title_text_size"
-            tools:ignore="RtlHardcoded"
-            tools:text="Lorem ipsum dolor" />
-
-        <org.schabi.newpipe.views.NewPipeTextView
-            android:id="@+id/sub_channel_title_view"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_below="@id/channel_title_view"
-            android:layout_alignLeft="@id/channel_title_view"
-            android:layout_alignRight="@id/channel_title_view"
-            android:ellipsize="end"
-            android:gravity="center|left"
-            android:lines="1"
-            android:textAppearance="?android:attr/textAppearanceLarge"
-            android:textSize="12dp"
-            tools:ignore="RtlHardcoded"
-            tools:layout_below="@id/channel_title_view"
-            tools:text="Lorem ipsum dolor" />
-
-        <org.schabi.newpipe.views.NewPipeTextView
-            android:id="@+id/channel_subscriber_view"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_below="@id/sub_channel_title_view"
-            android:layout_alignLeft="@id/channel_title_view"
-            android:layout_alignRight="@id/channel_title_view"
-            android:ellipsize="end"
-            android:maxLines="2"
-            android:textSize="@dimen/channel_subscribers_text_size"
-            android:visibility="gone"
-            tools:ignore="RtlHardcoded"
-            tools:text="123,141,411 subscribers"
-            tools:visibility="visible" />
-
-        <androidx.appcompat.widget.AppCompatButton
-            android:id="@+id/channel_subscribe_button"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_below="@+id/channel_banner_image"
-            android:layout_alignParentRight="true"
-            android:layout_gravity="center_vertical|right"
-            android:layout_marginRight="2dp"
-            android:text="@string/subscribe_button_title"
-            android:textSize="@dimen/channel_rss_title_size"
-            android:theme="@style/ServiceColoredButton"
-            android:visibility="gone"
-            tools:ignore="RtlHardcoded"
-            tools:visibility="visible" />
-    </RelativeLayout>
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_below="@id/channel_metadata">
-
-        <include
-            android:id="@+id/playlist_control"
-            layout="@layout/playlist_control" />
-
-    </LinearLayout>
-
-</RelativeLayout>

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

@@ -1,80 +1,214 @@
 <?xml version="1.0" encoding="utf-8"?>
-<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <androidx.recyclerview.widget.RecyclerView
+    <!-- since ToolbarTheme sets the tint to icons, it would make images all white,
-        android:id="@+id/items_list"
+    therefore app:tint="@null" is used to undo that setting -->
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/app_bar_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/ToolbarTheme"
+        app:elevation="0dp">
+
+        <org.schabi.newpipe.views.CustomCollapsingToolbarLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:fitsSystemWindows="true"
+            app:layout_scrollFlags="scroll|exitUntilCollapsed">
+
+            <androidx.constraintlayout.widget.ConstraintLayout
+                android:id="@+id/channel_metadata"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:fitsSystemWindows="true"
+                android:scaleType="centerCrop"
+                app:layout_collapseMode="parallax">
+
+                <ImageView
+                    android:id="@+id/channel_banner_image"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:adjustViewBounds="true"
+                    android:maxHeight="70dp"
+                    android:scaleType="fitCenter"
+                    android:src="@drawable/placeholder_channel_banner"
+                    app:layout_constraintTop_toTopOf="parent"
+                    app:tint="@null"
+                    tools:ignore="ContentDescription" />
+
+                <com.google.android.material.imageview.ShapeableImageView
+                    android:id="@+id/channel_avatar_view"
+                    android:layout_width="@dimen/channel_avatar_size"
+                    android:layout_height="@dimen/channel_avatar_size"
+                    android:layout_marginVertical="8dp"
+                    android:layout_marginStart="8dp"
+                    android:padding="1dp"
+                    android:src="@drawable/placeholder_person"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toTopOf="parent"
+                    app:layout_constraintVertical_bias="1.0"
+                    app:shapeAppearance="@style/CircularImageView"
+                    app:strokeColor="#ffffff"
+                    app:strokeWidth="2dp"
+                    app:tint="@null" />
+
+                <com.google.android.material.imageview.ShapeableImageView
+                    android:id="@+id/sub_channel_avatar_view"
+                    android:layout_width="@dimen/sub_channel_avatar_size"
+                    android:layout_height="@dimen/sub_channel_avatar_size"
+                    android:padding="1dp"
+                    android:src="@drawable/placeholder_person"
+                    android:visibility="gone"
+                    app:layout_constraintBottom_toBottomOf="@id/channel_avatar_view"
+                    app:layout_constraintEnd_toEndOf="@id/channel_avatar_view"
+                    app:shapeAppearance="@style/CircularImageView"
+                    app:strokeColor="#ffffff"
+                    app:strokeWidth="2dp"
+                    app:tint="@null"
+                    tools:visibility="visible" />
+
+                <org.schabi.newpipe.views.NewPipeTextView
+                    android:id="@+id/channel_title_view"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="8dp"
+                    android:layout_marginTop="8dp"
+                    android:layout_marginEnd="4dp"
+                    android:ellipsize="end"
+                    android:lines="1"
+                    android:textAppearance="?android:attr/textAppearanceLarge"
+                    android:textSize="16sp"
+                    app:layout_constraintBottom_toTopOf="@+id/sub_channel_title_view"
+                    app:layout_constraintEnd_toStartOf="@+id/channel_subscribe_button"
+                    app:layout_constraintStart_toEndOf="@+id/channel_avatar_view"
+                    app:layout_constraintTop_toBottomOf="@+id/channel_banner_image"
+                    tools:text="@tools:sample/lorem[10]" />
+
+                <org.schabi.newpipe.views.NewPipeTextView
+                    android:id="@+id/sub_channel_title_view"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="8dp"
+                    android:layout_marginEnd="4dp"
+                    android:ellipsize="end"
+                    android:lines="1"
+                    android:textAppearance="?android:attr/textAppearanceLarge"
+                    android:textSize="14sp"
+                    android:visibility="gone"
+                    app:layout_constraintBottom_toTopOf="@+id/channel_subscriber_view"
+                    app:layout_constraintEnd_toStartOf="@+id/channel_subscribe_button"
+                    app:layout_constraintStart_toEndOf="@+id/channel_avatar_view"
+                    app:layout_constraintTop_toBottomOf="@+id/channel_title_view"
+                    tools:text="@tools:sample/lorem[10]"
+                    tools:visibility="visible" />
+
+                <org.schabi.newpipe.views.NewPipeTextView
+                    android:id="@+id/channel_subscriber_view"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="8dp"
+                    android:layout_marginTop="2dp"
+                    android:layout_marginEnd="4dp"
+                    android:layout_marginBottom="8dp"
+                    android:textSize="12sp"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintEnd_toStartOf="@+id/channel_subscribe_button"
+                    app:layout_constraintStart_toEndOf="@+id/channel_avatar_view"
+                    app:layout_constraintTop_toBottomOf="@+id/sub_channel_title_view"
+                    tools:text="123,141,411 subscribers" />
+
+                <androidx.appcompat.widget.AppCompatButton
+                    android:id="@+id/channel_subscribe_button"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/subscribe_button_title"
+                    android:textSize="@dimen/channel_rss_title_size"
+                    app:layout_constraintBottom_toBottomOf="parent"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintTop_toBottomOf="@+id/channel_banner_image" />
+            </androidx.constraintlayout.widget.ConstraintLayout>
+        </org.schabi.newpipe.views.CustomCollapsingToolbarLayout>
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <RelativeLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:scrollbars="vertical"
+        android:layout_below="@id/app_bar_layout"
-        tools:listitem="@layout/list_stream_item" />
-
-    <ProgressBar
-        android:id="@+id/loading_progress_bar"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_centerInParent="true"
-        android:indeterminate="true"
-        android:visibility="gone"
-        tools:visibility="visible" />
-
-    <LinearLayout
-        android:id="@+id/empty_state_view"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_centerInParent="true"
         android:orientation="vertical"
-        android:paddingTop="90dp"
+        app:layout_behavior="@string/appbar_scrolling_view_behavior">
-        android:visibility="gone"
-        tools:visibility="visible">
 
-        <org.schabi.newpipe.views.NewPipeTextView
+        <com.google.android.material.tabs.TabLayout
-            android:id="@+id/channel_kaomoji"
+            android:id="@+id/tab_layout"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="?attr/colorPrimary"
+            app:tabGravity="fill"
+            app:tabIndicatorColor="@color/white"
+            app:tabMode="scrollable"
+            app:tabRippleColor="@color/white"
+            app:tabTextColor="@color/white" />
+
+        <androidx.viewpager.widget.ViewPager
+            android:id="@+id/view_pager"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_below="@id/tab_layout" />
+
+        <ProgressBar
+            android:id="@+id/loading_progress_bar"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="center"
+            android:layout_centerInParent="true"
-            android:layout_marginBottom="10dp"
+            android:indeterminate="true"
-            android:fontFamily="monospace"
+            android:visibility="gone"
-            android:text="(╯°-°)╯"
+            tools:visibility="visible" />
-            android:textSize="35sp"
-            tools:ignore="HardcodedText,UnusedAttribute" />
 
-        <org.schabi.newpipe.views.NewPipeTextView
+        <LinearLayout
-            android:id="@+id/empty_state_message"
+            android:id="@+id/empty_state_view"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_gravity="center"
+            android:layout_centerInParent="true"
-            android:text="@string/empty_view_no_videos"
+            android:orientation="vertical"
-            android:textSize="24sp" />
+            android:paddingTop="90dp"
+            android:visibility="gone"
+            tools:visibility="visible">
 
-        <org.schabi.newpipe.views.NewPipeTextView
+            <org.schabi.newpipe.views.NewPipeTextView
-            android:id="@+id/error_content_not_supported"
+                android:id="@+id/channel_kaomoji"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:layout_marginBottom="10dp"
+                android:fontFamily="monospace"
+                android:text="(︶︹︺)"
+                android:textSize="35sp"
+                tools:ignore="HardcodedText" />
+
+            <org.schabi.newpipe.views.NewPipeTextView
+                android:id="@+id/error_content_not_supported"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="20dp"
+                android:text="@string/content_not_supported"
+                android:textSize="15sp"
+                android:visibility="gone" />
+
+        </LinearLayout>
+
+        <!--ERROR PANEL-->
+        <include
+            android:id="@+id/error_panel"
+            layout="@layout/error_panel"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_marginTop="20dp"
+            android:layout_centerInParent="true"
-            android:text="@string/content_not_supported"
+            android:layout_marginTop="50dp"
-            android:textSize="15sp"
+            android:visibility="gone"
-            android:visibility="gone" />
+            tools:visibility="visible" />
-
+    </RelativeLayout>
-    </LinearLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
-
-    <!--ERROR PANEL-->
-    <include
-        android:id="@+id/error_panel"
-        layout="@layout/error_panel"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_centerInParent="true"
-        android:layout_marginTop="50dp"
-        android:visibility="gone"
-        tools:visibility="visible" />
-
-    <View
-        android:layout_width="match_parent"
-        android:layout_height="4dp"
-        android:layout_alignParentTop="true"
-        android:background="?attr/toolbar_shadow" />
-
-</RelativeLayout>

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

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/items_list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scrollbars="vertical"
+        tools:listitem="@layout/list_stream_item" />
+
+    <ProgressBar
+        android:id="@+id/loading_progress_bar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:indeterminate="true"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <include
+        android:id="@+id/empty_state_view"
+        layout="@layout/list_empty_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:gravity="center"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <!--ERROR PANEL-->
+    <include
+        android:id="@+id/error_panel"
+        layout="@layout/error_panel"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:layout_marginTop="50dp"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <View
+        android:layout_width="match_parent"
+        android:layout_height="4dp"
+        android:layout_alignParentTop="true"
+        android:background="?attr/toolbar_shadow" />
+
+</RelativeLayout>

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

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/items_list"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:scrollbars="vertical"
+        tools:listitem="@layout/list_stream_item" />
+
+    <ProgressBar
+        android:id="@+id/loading_progress_bar"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:indeterminate="true"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <LinearLayout
+        android:id="@+id/empty_state_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:orientation="vertical"
+        android:paddingTop="90dp"
+        android:visibility="gone"
+        tools:visibility="visible">
+
+        <org.schabi.newpipe.views.NewPipeTextView
+            android:id="@+id/channel_kaomoji"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:layout_marginBottom="10dp"
+            android:fontFamily="monospace"
+            android:text="(╯°-°)╯"
+            android:textSize="35sp"
+            tools:ignore="HardcodedText,UnusedAttribute" />
+
+        <org.schabi.newpipe.views.NewPipeTextView
+            android:id="@+id/channel_no_videos"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:text="@string/empty_view_no_videos"
+            android:textSize="24sp" />
+
+    </LinearLayout>
+
+    <!--ERROR PANEL-->
+    <include
+        android:id="@+id/error_panel"
+        layout="@layout/error_panel"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true"
+        android:layout_marginTop="50dp"
+        android:visibility="gone"
+        tools:visibility="visible" />
+
+    <View
+        android:layout_width="match_parent"
+        android:layout_height="4dp"
+        android:layout_alignParentTop="true"
+        android:background="?attr/toolbar_shadow" />
+
+</RelativeLayout>

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

@@ -8,6 +8,7 @@
     android:scrollbars="vertical">
 
     <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/constraint_layout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:animateLayoutChanges="true">

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

@@ -620,6 +620,7 @@
     <string name="metadata_thumbnail_url">Vorschaubild-URL</string>
     <string name="metadata_host">Server</string>
     <string name="metadata_support">Unterstützung</string>
+    <string name="metadata_subscribers">Abonnenten</string>
     <string name="description_select_disable">Auswählen von Text in der Beschreibung deaktivieren</string>
     <string name="description_select_enable">Auswählen von Text in der Beschreibung aktivieren</string>
     <string name="description_select_note">Du kannst nun Text innerhalb der Beschreibung auswählen. Beachte, dass die Seite flackern kann und Links im Auswahlmodus möglicherweise nicht anklickbar sind.</string>
@@ -766,4 +767,12 @@
     <string name="disable_media_tunneling_automatic_info">Das Media-Tunneling wurde auf dem Gerät standardmäßig deaktiviert, da das Gerätemodell diese Funktion bekanntermaßen nicht unterstützt.</string>
     <string name="no_live_streams">Keine Live-Streams</string>
     <string name="no_streams">Keine Streams</string>
+    <string name="channel_tab_videos">Videos</string>
+    <string name="channel_tab_livestreams">Live</string>
+    <string name="channel_tab_shorts">Shorts</string>
+    <string name="channel_tab_playlists">Wiedergabelisten</string>
+    <string name="channel_tab_channels">Kanäle</string>
+    <string name="channel_tab_albums">Alben</string>
+    <string name="show_channel_tabs">Tabs auf den Kanalseiten</string>
+    <string name="show_channel_tabs_summary">Welche Tabs auf den Kanalseiten angezeigt werden</string>
 </resources>

app/src/main/res/values-land/dimens.xml

@@ -32,7 +32,6 @@
     <dimen name="video_item_detail_sub_channel_text_size">16sp</dimen>
     <dimen name="video_item_detail_upload_date_text_size">14sp</dimen>
     <dimen name="video_item_detail_description_text_size">14sp</dimen>
-    <dimen name="channel_subscribers_text_size">14sp</dimen>
     <dimen name="channel_rss_title_size">14sp</dimen>
     <!-- Elements Size -->
     <dimen name="video_item_detail_uploader_image_size">42dp</dimen>

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

@@ -75,7 +75,6 @@
     <dimen name="video_item_detail_sub_channel_text_size">14sp</dimen>
     <dimen name="video_item_detail_upload_date_text_size">13sp</dimen>
     <dimen name="video_item_detail_description_text_size">13sp</dimen>
-    <dimen name="channel_subscribers_text_size">12sp</dimen>
     <dimen name="channel_rss_title_size">12sp</dimen>
     <!-- Elements Size -->
     <dimen name="video_item_detail_uploader_image_size">32dp</dimen>

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

@@ -274,6 +274,35 @@
     <string name="main_tabs_position_key">main_tabs_position</string>
 
     <!-- Content & History -->
+    <string name="show_channel_tabs_key">channel_tabs</string>
+    <string name="show_channel_tabs_videos">show_channel_tabs_videos</string>
+    <string name="show_channel_tabs_tracks">show_channel_tabs_tracks</string>
+    <string name="show_channel_tabs_shorts">show_channel_tabs_shorts</string>
+    <string name="show_channel_tabs_livestreams">show_channel_tabs_livestreams</string>
+    <string name="show_channel_tabs_channels">show_channel_tabs_channels</string>
+    <string name="show_channel_tabs_playlists">show_channel_tabs_playlists</string>
+    <string name="show_channel_tabs_albums">show_channel_tabs_albums</string>
+    <string name="show_channel_tabs_about">show_channel_tabs_about</string>
+    <string-array name="show_channel_tabs_value_list">
+        <item>@string/show_channel_tabs_videos</item>
+        <item>@string/show_channel_tabs_tracks</item>
+        <item>@string/show_channel_tabs_shorts</item>
+        <item>@string/show_channel_tabs_livestreams</item>
+        <item>@string/show_channel_tabs_channels</item>
+        <item>@string/show_channel_tabs_playlists</item>
+        <item>@string/show_channel_tabs_albums</item>
+        <item>@string/show_channel_tabs_about</item>
+    </string-array>
+    <string-array name="show_channel_tabs_description_list">
+        <item>@string/channel_tab_videos</item>
+        <item>@string/channel_tab_tracks</item>
+        <item>@string/channel_tab_shorts</item>
+        <item>@string/channel_tab_livestreams</item>
+        <item>@string/channel_tab_channels</item>
+        <item>@string/channel_tab_playlists</item>
+        <item>@string/channel_tab_albums</item>
+        <item>@string/channel_tab_about</item>
+    </string-array>
     <string name="show_search_suggestions_key">show_search_suggestions</string>
     <string name="show_local_search_suggestions_key">show_local_search_suggestions</string>
     <string name="show_remote_search_suggestions_key">show_remote_search_suggestions</string>
@@ -343,6 +372,24 @@
     </string-array>
     <string name="feed_use_dedicated_fetch_method_key">feed_use_dedicated_fetch_method</string>
 
+    <string name="feed_fetch_channel_tabs_key">feed_fetch_channel_tabs</string>
+    <string name="fetch_channel_tabs_videos">fetch_channel_tabs_videos</string>
+    <string name="fetch_channel_tabs_tracks">fetch_channel_tabs_tracks</string>
+    <string name="fetch_channel_tabs_shorts">fetch_channel_tabs_shorts</string>
+    <string name="fetch_channel_tabs_livestreams">fetch_channel_tabs_livestreams</string>
+    <string-array name="feed_fetch_channel_tabs_value_list">
+        <item>@string/fetch_channel_tabs_videos</item>
+        <item>@string/fetch_channel_tabs_tracks</item>
+        <item>@string/fetch_channel_tabs_shorts</item>
+        <item>@string/fetch_channel_tabs_livestreams</item>
+    </string-array>
+    <string-array name="feed_fetch_channel_tabs_description_list">
+        <item>@string/channel_tab_videos</item>
+        <item>@string/channel_tab_tracks</item>
+        <item>@string/channel_tab_shorts</item>
+        <item>@string/channel_tab_livestreams</item>
+    </string-array>
+
     <string name="import_export_data_path">import_export_data_path</string>
     <string name="import_data">import_data</string>
     <string name="export_data">export_data</string>

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

@@ -714,6 +714,8 @@
 \nSo the choice boils down to what you prefer: speed or precise information.</string>
     <string name="feed_hide_streams_title">Show the following streams</string>
     <string name="feed_show_hide_streams">Show/Hide streams</string>
+    <string name="feed_fetch_channel_tabs">Fetch channel tabs</string>
+    <string name="feed_fetch_channel_tabs_summary">Tabs to fetch when updating the feed. This option has no effect if a channel is updated using fast mode.</string>
     <string name="content_not_supported">This content is not yet supported by NewPipe.\n\nIt will hopefully be supported in a future version.</string>
     <string name="detail_sub_channel_thumbnail_view_description">Channel\'s avatar thumbnail</string>
     <string name="channel_created_by">Created by %s</string>
@@ -754,10 +756,13 @@
     <string name="metadata_support">Support</string>
     <string name="metadata_host">Host</string>
     <string name="metadata_thumbnail_url">Thumbnail URL</string>
+    <string name="metadata_avatar_url">Avatar URL</string>
+    <string name="metadata_banner_url">Banner URL</string>
     <string name="metadata_privacy_public">Public</string>
     <string name="metadata_privacy_unlisted">Unlisted</string>
     <string name="metadata_privacy_private">Private</string>
     <string name="metadata_privacy_internal">Internal</string>
+    <string name="metadata_subscribers">Subscribers</string>
     <string name="detail_pinned_comment_view_description">Pinned comment</string>
     <string name="detail_heart_img_view_description">Hearted by creator</string>
     <string name="open_website_license">Open website</string>
@@ -796,4 +801,14 @@
     <string name="audio_track_type_original">original</string>
     <string name="audio_track_type_dubbed">dubbed</string>
     <string name="audio_track_type_descriptive">descriptive</string>
+    <string name="channel_tab_videos">Videos</string>
+    <string name="channel_tab_tracks">Tracks</string>
+    <string name="channel_tab_shorts">Shorts</string>
+    <string name="channel_tab_livestreams">Live</string>
+    <string name="channel_tab_channels">Channels</string>
+    <string name="channel_tab_playlists">Playlists</string>
+    <string name="channel_tab_albums">Albums</string>
+    <string name="channel_tab_about">About</string>
+    <string name="show_channel_tabs">Channel tabs</string>
+    <string name="show_channel_tabs_summary">What tabs are shown on the channel pages</string>
 </resources>

app/src/main/res/xml/content_settings.xml

@@ -41,6 +41,16 @@
         app:singleLineTitle="false"
         app:iconSpaceReserved="false" />
 
+    <MultiSelectListPreference
+        android:key="@string/show_channel_tabs_key"
+        android:summary="@string/show_channel_tabs_summary"
+        android:title="@string/show_channel_tabs"
+        android:entries="@array/show_channel_tabs_description_list"
+        android:entryValues="@array/show_channel_tabs_value_list"
+        android:defaultValue="@array/show_channel_tabs_value_list"
+        app:iconSpaceReserved="false"
+        app:singleLineTitle="false" />
+
     <PreferenceScreen
         android:fragment="org.schabi.newpipe.settings.PeertubeInstanceListFragment"
         android:key="@string/peertube_instance_setup_key"
@@ -152,5 +162,15 @@
             app:singleLineTitle="false"
             app:iconSpaceReserved="false" />
 
+        <MultiSelectListPreference
+            android:key="@string/feed_fetch_channel_tabs_key"
+            android:summary="@string/feed_fetch_channel_tabs_summary"
+            android:title="@string/feed_fetch_channel_tabs"
+            android:entries="@array/feed_fetch_channel_tabs_description_list"
+            android:entryValues="@array/feed_fetch_channel_tabs_value_list"
+            android:defaultValue="@array/feed_fetch_channel_tabs_value_list"
+            app:iconSpaceReserved="false"
+            app:singleLineTitle="false" />
+
     </PreferenceCategory>
 </PreferenceScreen>