Try fixing IllegalArgumentException at androidx.viewpager.widget.ViewPager.onInterceptTouchEvent.

app/src/main/java/ml/docilealligator/infinityforreddit/activities/CustomThemePreviewActivity.java

@@ -1,5 +1,10 @@
 package ml.docilealligator.infinityforreddit.activities;
 
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
+import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
+
 import android.content.SharedPreferences;
 import android.content.res.ColorStateList;
 import android.content.res.Configuration;
@@ -43,22 +48,18 @@ import javax.inject.Named;
 import butterknife.BindView;
 import butterknife.ButterKnife;
 import ml.docilealligator.infinityforreddit.AppBarStateChangeListener;
+import ml.docilealligator.infinityforreddit.Infinity;
+import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.customtheme.CustomTheme;
 import ml.docilealligator.infinityforreddit.customtheme.CustomThemeSettingsItem;
+import ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed;
 import ml.docilealligator.infinityforreddit.font.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.font.FontStyle;
 import ml.docilealligator.infinityforreddit.font.TitleFontStyle;
 import ml.docilealligator.infinityforreddit.fragments.ThemePreviewCommentsFragment;
 import ml.docilealligator.infinityforreddit.fragments.ThemePreviewPostsFragment;
-import ml.docilealligator.infinityforreddit.Infinity;
-import ml.docilealligator.infinityforreddit.R;
 import ml.docilealligator.infinityforreddit.utils.SharedPreferencesUtils;
 
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
-import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
-
 public class CustomThemePreviewActivity extends AppCompatActivity {
 
     public static final String EXTRA_CUSTOM_THEME_SETTINGS_ITEMS = "ECTSI";
@@ -66,7 +67,7 @@ public class CustomThemePreviewActivity extends AppCompatActivity {
     @BindView(R.id.coordinator_layout_theme_preview_activity)
     CoordinatorLayout coordinatorLayout;
     @BindView(R.id.view_pager_theme_preview_activity)
-    ViewPager viewPager;
+    ViewPagerBugFixed viewPager;
     @BindView(R.id.appbar_layout_theme_preview_activity)
     AppBarLayout appBarLayout;
     @BindView(R.id.collapsing_toolbar_layout_theme_preview_activity)

app/src/main/java/ml/docilealligator/infinityforreddit/activities/SubscribedThingListingActivity.java

@@ -47,6 +47,7 @@ import ml.docilealligator.infinityforreddit.RedditDataRoomDatabase;
 import ml.docilealligator.infinityforreddit.asynctasks.InsertMultireddit;
 import ml.docilealligator.infinityforreddit.asynctasks.InsertSubscribedThings;
 import ml.docilealligator.infinityforreddit.customtheme.CustomThemeWrapper;
+import ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed;
 import ml.docilealligator.infinityforreddit.events.GoBackToMainPageEvent;
 import ml.docilealligator.infinityforreddit.events.RefreshMultiRedditsEvent;
 import ml.docilealligator.infinityforreddit.events.SwitchAccountEvent;
@@ -77,7 +78,7 @@ public class SubscribedThingListingActivity extends BaseActivity implements Acti
     @BindView(R.id.tab_layout_subscribed_thing_listing_activity)
     TabLayout tabLayout;
     @BindView(R.id.view_pager_subscribed_thing_listing_activity)
-    ViewPager viewPager;
+    ViewPagerBugFixed viewPager;
     @BindView(R.id.fab_subscribed_thing_listing_activity)
     FloatingActionButton fab;
     @Inject

app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewImgurMediaActivity.java

@@ -36,7 +36,13 @@ import javax.inject.Named;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
+import ml.docilealligator.infinityforreddit.ImgurMedia;
+import ml.docilealligator.infinityforreddit.Infinity;
+import ml.docilealligator.infinityforreddit.R;
+import ml.docilealligator.infinityforreddit.SetAsWallpaperCallback;
+import ml.docilealligator.infinityforreddit.WallpaperSetter;
 import ml.docilealligator.infinityforreddit.apis.ImgurAPI;
+import ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed;
 import ml.docilealligator.infinityforreddit.font.ContentFontFamily;
 import ml.docilealligator.infinityforreddit.font.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.font.FontFamily;
@@ -45,14 +51,9 @@ import ml.docilealligator.infinityforreddit.font.TitleFontFamily;
 import ml.docilealligator.infinityforreddit.font.TitleFontStyle;
 import ml.docilealligator.infinityforreddit.fragments.ViewImgurImageFragment;
 import ml.docilealligator.infinityforreddit.fragments.ViewImgurVideoFragment;
-import ml.docilealligator.infinityforreddit.ImgurMedia;
-import ml.docilealligator.infinityforreddit.Infinity;
-import ml.docilealligator.infinityforreddit.R;
-import ml.docilealligator.infinityforreddit.SetAsWallpaperCallback;
 import ml.docilealligator.infinityforreddit.utils.APIUtils;
 import ml.docilealligator.infinityforreddit.utils.JSONUtils;
 import ml.docilealligator.infinityforreddit.utils.SharedPreferencesUtils;
-import ml.docilealligator.infinityforreddit.WallpaperSetter;
 import retrofit2.Call;
 import retrofit2.Callback;
 import retrofit2.Response;
@@ -72,7 +73,7 @@ public class ViewImgurMediaActivity extends AppCompatActivity implements SetAsWa
     @BindView(R.id.progress_bar_view_imgur_media_activity)
     ProgressBar progressBar;
     @BindView(R.id.view_pager_view_imgur_media_activity)
-    ViewPager viewPager;
+    ViewPagerBugFixed viewPager;
     @BindView(R.id.load_image_error_linear_layout_view_imgur_media_activity)
     LinearLayout errorLinearLayout;
     private SectionsPagerAdapter sectionsPagerAdapter;

app/src/main/java/ml/docilealligator/infinityforreddit/activities/ViewRedditGalleryActivity.java

@@ -28,6 +28,7 @@ import javax.inject.Named;
 
 import butterknife.BindView;
 import butterknife.ButterKnife;
+import ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed;
 import ml.docilealligator.infinityforreddit.font.ContentFontFamily;
 import ml.docilealligator.infinityforreddit.font.ContentFontStyle;
 import ml.docilealligator.infinityforreddit.font.FontFamily;
@@ -51,7 +52,7 @@ public class ViewRedditGalleryActivity extends AppCompatActivity implements SetA
     @BindView(R.id.hauler_view_view_reddit_gallery_activity)
     HaulerView haulerView;
     @BindView(R.id.view_pager_view_reddit_gallery_activity)
-    ViewPager viewPager;
+    ViewPagerBugFixed viewPager;
     private SectionsPagerAdapter sectionsPagerAdapter;
     private ArrayList<Post.Gallery> gallery;
     private String subredditName;

app/src/main/java/ml/docilealligator/infinityforreddit/customviews/ViewPagerBugFixed.java

@@ -0,0 +1,37 @@
+package ml.docilealligator.infinityforreddit.customviews;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.viewpager.widget.ViewPager;
+
+public class ViewPagerBugFixed extends ViewPager {
+    public ViewPagerBugFixed(@NonNull Context context) {
+        super(context);
+    }
+
+    public ViewPagerBugFixed(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent ev) {
+        try {
+            return super.onTouchEvent(ev);
+        } catch (IllegalArgumentException ignore) {}
+
+        return false;
+    }
+
+    @Override
+    public boolean onInterceptTouchEvent(MotionEvent ev) {
+        try {
+            return super.onInterceptTouchEvent(ev);
+        } catch (IllegalArgumentException ignore) {}
+
+        return false;
+    }
+}

app/src/main/java/ml/docilealligator/infinityforreddit/fragments/ViewRPANBroadcastFragment.java

@@ -6,7 +6,6 @@ import android.content.res.Configuration;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;

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

@@ -45,7 +45,7 @@
 
     </com.google.android.material.appbar.AppBarLayout>
 
-    <androidx.viewpager.widget.ViewPager
+    <ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed
         android:id="@+id/view_pager_subscribed_thing_listing_activity"
         android:layout_width="match_parent"
         android:layout_height="match_parent"

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

@@ -7,7 +7,7 @@
     android:id="@+id/coordinator_layout_theme_preview_activity"
     tools:context=".activities.CustomThemePreviewActivity">
 
-    <androidx.viewpager.widget.ViewPager
+    <ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed
         android:id="@+id/view_pager_theme_preview_activity"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"

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

@@ -23,10 +23,10 @@
                 android:layout_height="wrap_content"
                 android:layout_centerInParent="true" />
 
-            <androidx.viewpager.widget.ViewPager
+            <ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed
+                android:id="@+id/view_pager_view_imgur_media_activity"
                 android:layout_width="match_parent"
-                android:layout_height="match_parent"
+                android:layout_height="match_parent" />
-                android:id="@+id/view_pager_view_imgur_media_activity" />
 
             <LinearLayout
                 android:id="@+id/load_image_error_linear_layout_view_imgur_media_activity"

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

@@ -13,7 +13,7 @@
         android:layout_height="match_parent"
         android:fillViewport="true">
 
-        <androidx.viewpager.widget.ViewPager
+        <ml.docilealligator.infinityforreddit.customviews.ViewPagerBugFixed
             android:id="@+id/view_pager_view_reddit_gallery_activity"
             android:layout_width="match_parent"
             android:layout_height="match_parent" />