优化

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

@@ -38,7 +38,6 @@ class ChapterListFragment : VMBaseFragment<TocViewModel>(R.layout.fragment_chapt
     private var durChapterIndex = 0
     private lateinit var mLayoutManager: UpLinearLayoutManager
     private var tocFlowJob: Job? = null
-    private var isFirstSetData = true
 
     override fun onFragmentCreated(view: View, savedInstanceState: Bundle?) = binding.run {
         viewModel.chapterCallBack = this@ChapterListFragment
@@ -114,10 +113,11 @@ 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.diffCallBack)
-                if (isFirstSetData) {
-                    mLayoutManager.scrollToPositionWithOffset(durChapterIndex, 0)
-                    isFirstSetData = false
+                if (!(searchKey.isNullOrBlank() && it.isEmpty())) {
+                    adapter.setItems(it, adapter.diffCallBack)
+                    if (searchKey.isNullOrBlank()) {
+                        mLayoutManager.scrollToPositionWithOffset(durChapterIndex, 0)
+                    }
                 }
             }
         }