优化

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

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
     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"
     android:orientation="vertical">
 
     <io.legado.app.ui.widget.TitleBar
@@ -20,6 +20,7 @@
             android:id="@+id/recycler_view"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
+            android:clipToPadding="false"
             app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
             tools:listitem="@layout/item_rule_sub" />
 
@@ -27,15 +28,15 @@
             android:id="@+id/tv_empty_msg"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_margin="16dp"
             android:layout_gravity="center"
+            android:layout_margin="16dp"
             android:gravity="center"
-            android:visibility="gone"
             android:text="@string/rule_sub_empty_msg"
-            app:layout_constraintTop_toBottomOf="@+id/title_bar"
+            android:visibility="gone"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintLeft_toLeftOf="parent"
             app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/title_bar"
             tools:text="TextView" />
 
     </FrameLayout>