优化

app/src/main/java/io/legado/app/ui/book/toc/ChapterListAdapter.kt

@@ -2,6 +2,7 @@ package io.legado.app.ui.book.toc
 
 import android.content.Context
 import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
 import io.legado.app.R
 import io.legado.app.base.adapter.ItemViewHolder
 import io.legado.app.base.adapter.RecyclerAdapter
@@ -16,6 +17,22 @@ class ChapterListAdapter(context: Context, val callback: Callback) :
     RecyclerAdapter<BookChapter, ItemChapterListBinding>(context) {
 
     val cacheFileNames = hashSetOf<String>()
+    val diffCallBack = object : DiffUtil.ItemCallback<BookChapter>() {
+
+        override fun areItemsTheSame(oldItem: BookChapter, newItem: BookChapter): Boolean {
+            return oldItem.index == newItem.index
+        }
+
+        override fun areContentsTheSame(oldItem: BookChapter, newItem: BookChapter): Boolean {
+            return oldItem.bookUrl == newItem.bookUrl
+                    && oldItem.url == newItem.url
+                    && oldItem.isVip == newItem.isVip
+                    && oldItem.isPay == newItem.isPay
+                    && oldItem.title == newItem.title
+                    && oldItem.tag == newItem.tag
+        }
+
+    }
 
     override fun getViewBinding(parent: ViewGroup): ItemChapterListBinding {
         return ItemChapterListBinding.inflate(inflater, parent, false)

app/src/main/java/io/legado/app/ui/book/toc/ChapterListFragment.kt

@@ -112,7 +112,7 @@ class ChapterListFragment : VMBaseFragment<TocViewModel>(R.layout.fragment_chapt
                 searchKey.isNullOrBlank() -> appDb.bookChapterDao.flowByBook(viewModel.bookUrl)
                 else -> appDb.bookChapterDao.flowSearch(viewModel.bookUrl, searchKey)
             }.collect {
-                adapter.setItems(it)
+                adapter.setItems(it, adapter.diffCallBack)
                 if (searchKey.isNullOrBlank() && !scrollToDurChapter) {
                     mLayoutManager.scrollToPositionWithOffset(durChapterIndex, 0)
                     scrollToDurChapter = true