更新界面

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

@@ -2,6 +2,7 @@
 <androidx.constraintlayout.widget.ConstraintLayout 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"
     android:descendantFocusability="blocksDescendants">
 
     <io.legato.kazusa.ui.widget.recycler.scroller.FastScrollRecyclerView
@@ -11,4 +12,31 @@
         android:clipToPadding="false"
         android:overScrollMode="never" />
 
+    <LinearLayout
+        android:id="@+id/tv_empty_msg"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:layout_margin="16dp"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="(๑`^´๑)"
+            android:textSize="32sp" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_margin="8dp"
+            android:text="还没有添加书签哦！" />
+    </LinearLayout>
+
 </androidx.constraintlayout.widget.ConstraintLayout>