修复上下滑动会导致左右切换问题，添加了新的自定义组件RecyclerViewAtViewPager2

app/src/main/java/io/legado/app/ui/widget/RecyclerViewAtViewPager2.java

@@ -0,0 +1,55 @@
+package io.legado.app.ui.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.RecyclerView;
+
+public class RecyclerViewAtViewPager2 extends RecyclerView {
+
+    public RecyclerViewAtViewPager2(@NonNull Context context) {
+        super(context);
+    }
+
+    public RecyclerViewAtViewPager2(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public RecyclerViewAtViewPager2(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    private int startX, startY;
+
+    @Override
+    public boolean dispatchTouchEvent(MotionEvent ev) {
+        switch (ev.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                startX = (int) ev.getX();
+                startY = (int) ev.getY();
+                getParent().requestDisallowInterceptTouchEvent(true);
+                break;
+            case MotionEvent.ACTION_MOVE:
+                int endX = (int) ev.getX();
+                int endY = (int) ev.getY();
+                int disX = Math.abs(endX - startX);
+                int disY = Math.abs(endY - startY);
+                if (disX > disY) {
+                    if (disX > 50) {
+                        getParent().requestDisallowInterceptTouchEvent(false);
+                    }
+                } else {
+                    getParent().requestDisallowInterceptTouchEvent(true);
+                }
+                break;
+            case MotionEvent.ACTION_UP:
+            case MotionEvent.ACTION_CANCEL:
+                getParent().requestDisallowInterceptTouchEvent(false);
+                break;
+        }
+        return super.dispatchTouchEvent(ev);
+    }
+}

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

@@ -9,7 +9,7 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
-        <androidx.recyclerview.widget.RecyclerView
+        <io.legado.app.ui.widget.RecyclerViewAtViewPager2
             android:id="@+id/rv_bookshelf"
             android:layout_width="match_parent"
             android:layout_height="match_parent"

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

@@ -15,7 +15,7 @@
         app:layout_constraintTop_toTopOf="parent"
         app:title="@string/discovery" />
 
-    <androidx.recyclerview.widget.RecyclerView
+    <io.legado.app.ui.widget.RecyclerViewAtViewPager2
         android:id="@+id/rv_find"
         android:layout_width="match_parent"
         android:layout_height="0dp"

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

@@ -15,7 +15,7 @@
         app:layout_constraintTop_toTopOf="parent"
         app:title="@string/rss" />
 
-    <androidx.recyclerview.widget.RecyclerView
+    <io.legado.app.ui.widget.RecyclerViewAtViewPager2
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="0dp"

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

@@ -4,7 +4,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <androidx.recyclerview.widget.RecyclerView
+    <io.legado.app.ui.widget.RecyclerViewAtViewPager2
         android:id="@+id/recycler_view"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />