优化

app/src/main/java/io/legado/app/ui/main/bookshelf/style2/BooksAdapterGrid.kt

@@ -54,17 +54,14 @@ class BooksAdapterGrid(context: Context, callBack: CallBack) :
 
     private fun onBindGroup(binding: ItemBookshelfGridGroupBinding, position: Int, bundle: Bundle) {
         binding.run {
-            val item = callBack.getItem(position)
+            val item = callBack.getItem(position) as BookGroup
-            if (item is BookGroup) {
             tvName.text = item.groupName
         }
     }
-    }
 
     private fun onBindBook(binding: ItemBookshelfGridBinding, position: Int, bundle: Bundle) {
         binding.run {
-            val item = callBack.getItem(position)
+            val item = callBack.getItem(position) as Book
-            if (item is Book) {
             bundle.keySet().forEach {
                 when (it) {
                     "name" -> tvName.text = item.name
@@ -78,7 +75,6 @@ class BooksAdapterGrid(context: Context, callBack: CallBack) :
             }
         }
     }
-    }
 
     override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
         when (holder) {

app/src/main/java/io/legado/app/ui/main/bookshelf/style2/BooksAdapterList.kt

@@ -53,17 +53,14 @@ class BooksAdapterList(context: Context, callBack: CallBack) :
 
     private fun onBindGroup(binding: ItemBookshelfListGroupBinding, position: Int, bundle: Bundle) {
         binding.run {
-            val item = callBack.getItem(position)
+            val item = callBack.getItem(position) as BookGroup
-            if (item is BookGroup) {
             tvName.text = item.groupName
         }
     }
-    }
 
     private fun onBindBook(binding: ItemBookshelfListBinding, position: Int, bundle: Bundle) {
         binding.run {
-            val item = callBack.getItem(position)
+            val item = callBack.getItem(position) as Book
-            if (item is Book) {
             tvRead.text = item.durChapterTitle
             tvLast.text = item.latestChapterTitle
             bundle.keySet().forEach {
@@ -80,7 +77,6 @@ class BooksAdapterList(context: Context, callBack: CallBack) :
             }
         }
     }
-    }
 
     override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) {
         when (holder) {