fix: handle unsupported content

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

@@ -21,6 +21,7 @@ import org.schabi.newpipe.databinding.FragmentChannelBinding;
 import org.schabi.newpipe.error.ErrorInfo;
 import org.schabi.newpipe.error.UserAction;
 import org.schabi.newpipe.extractor.channel.ChannelInfo;
+import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
 import org.schabi.newpipe.extractor.linkhandler.ChannelTabHandler;
 import org.schabi.newpipe.fragments.BaseStateFragment;
 import org.schabi.newpipe.fragments.detail.TabAdapter;
@@ -247,11 +248,25 @@ public class ChannelFragment extends BaseStateFragment<ChannelInfo> {
     // Init
     //////////////////////////////////////////////////////////////////////////*/
 
+    private boolean isContentUnsupported() {
+        for (final Throwable throwable : currentInfo.getErrors()) {
+            if (throwable instanceof ContentNotSupportedException) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     private void updateTabs() {
         tabAdapter.clearAllItems();
 
         if (currentInfo != null) {
-            tabAdapter.addFragment(ChannelVideosFragment.getInstance(currentInfo), "Videos");
+            if (isContentUnsupported()) {
+                showEmptyState();
+                binding.errorContentNotSupported.setVisibility(View.VISIBLE);
+            } else {
+                tabAdapter.addFragment(
+                        ChannelVideosFragment.getInstance(currentInfo), "Videos");
 
                 for (final ChannelTabHandler tab : currentInfo.getTabs()) {
                     tabAdapter.addFragment(
@@ -259,8 +274,10 @@ public class ChannelFragment extends BaseStateFragment<ChannelInfo> {
                 }
 
                 final String description = currentInfo.getDescription();
-            if (!description.isEmpty()) {
-                tabAdapter.addFragment(ChannelInfoFragment.getInstance(description), "Info");
+                if (description != null && !description.isEmpty()) {
+                    tabAdapter.addFragment(
+                            ChannelInfoFragment.getInstance(description), "Info");
+                }
             }
         }
 
@@ -296,11 +313,11 @@ public class ChannelFragment extends BaseStateFragment<ChannelInfo> {
     }
 
     @Override
-    public void handleResult(@NonNull final ChannelInfo info) {
-        super.handleResult(info);
+    public void handleResult(@NonNull final ChannelInfo result) {
+        super.handleResult(result);
+        currentInfo = result;
+        setInitialData(result.getServiceId(), result.getOriginalUrl(), result.getName());
 
-        currentInfo = info;
-        setInitialData(info.getServiceId(), info.getOriginalUrl(), info.getName());
         updateTabs();
         updateRssButton();
         monitorSubscription();

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

@@ -132,13 +132,13 @@ public class ChannelVideosFragment extends BaseListInfoFragment<StreamInfoItem,
     public View onCreateView(@NonNull final LayoutInflater inflater,
                              @Nullable final ViewGroup container,
                              @Nullable final Bundle savedInstanceState) {
-        return inflater.inflate(R.layout.fragment_channel_videos, container, false);
+        channelBinding = FragmentChannelVideosBinding.inflate(inflater, container, false);
+        return channelBinding.getRoot();
     }
 
     @Override
     public void onViewCreated(@NonNull final View rootView, final Bundle savedInstanceState) {
         super.onViewCreated(rootView, savedInstanceState);
-        channelBinding = FragmentChannelVideosBinding.bind(rootView);
         showContentNotSupportedIfNeeded();
     }
 

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

@@ -30,6 +30,38 @@
         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/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"