优化

app/src/main/java/io/legado/app/base/adapter/DiffRecyclerAdapter.kt

@@ -8,8 +8,6 @@ import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewbinding.ViewBinding
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
 import splitties.views.onLongClick
 
 /**
@@ -48,9 +46,7 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
         recyclerView.adapter = this
     }
 
-    suspend fun setItems(items: List<ITEM>?) {
-        withContext(Dispatchers.Default) {
-            synchronized(asyncListDiffer) {
+    fun setItems(items: List<ITEM>?) {
         kotlin.runCatching {
             if (items == null) {
                 asyncListDiffer.submitList(null)
@@ -59,20 +55,15 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
             }
         }
     }
-        }
-    }
 
     fun setItem(position: Int, item: ITEM) {
-        synchronized(asyncListDiffer) {
         kotlin.runCatching {
             asyncListDiffer.currentList[position] = item
             notifyItemChanged(position)
         }
     }
-    }
 
     fun updateItem(item: ITEM) {
-        synchronized(asyncListDiffer) {
         kotlin.runCatching {
             val index = asyncListDiffer.currentList.indexOf(item)
             if (index >= 0) {
@@ -81,10 +72,8 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
             }
         }
     }
-    }
 
     fun updateItem(position: Int, payload: Any) {
-        synchronized(asyncListDiffer) {
         kotlin.runCatching {
             val size = itemCount
             if (position in 0 until size) {
@@ -92,10 +81,8 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
             }
         }
     }
-    }
 
     fun updateItems(fromPosition: Int, toPosition: Int, payloads: Any) {
-        synchronized(asyncListDiffer) {
         kotlin.runCatching {
             val size = itemCount
             if (fromPosition in 0 until size && toPosition in 0 until size) {
@@ -107,7 +94,6 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
             }
         }
     }
-    }
 
     fun isEmpty() = asyncListDiffer.currentList.isEmpty()
 

app/src/main/java/io/legado/app/ui/book/changecover/ChangeCoverDialog.kt

@@ -15,6 +15,7 @@ import io.legado.app.lib.theme.primaryColor
 import io.legado.app.utils.applyTint
 import io.legado.app.utils.setLayout
 import io.legado.app.utils.viewbindingdelegate.viewBinding
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.launch
@@ -67,7 +68,7 @@ class ChangeCoverDialog() : BaseDialogFragment(R.layout.dialog_change_cover),
     }
 
     private fun initData() {
-        launch {
+        launch(Dispatchers.Default) {
             whenStarted {
                 viewModel.dataFlow.conflate().collect {
                     adapter.setItems(it)

app/src/main/java/io/legado/app/ui/book/changesource/ChangeBookSourceDialog.kt

@@ -29,6 +29,7 @@ import io.legado.app.ui.book.source.manage.BookSourceActivity
 import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.utils.*
 import io.legado.app.utils.viewbindingdelegate.viewBinding
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.launch
@@ -145,7 +146,7 @@ class ChangeBookSourceDialog() : BaseDialogFragment(R.layout.dialog_book_change_
             }
             binding.toolBar.menu.applyTint(requireContext())
         }
-        launch {
+        launch(Dispatchers.Default) {
             whenStarted {
                 viewModel.searchDataFlow.conflate().collect {
                     adapter.setItems(it)

app/src/main/java/io/legado/app/ui/book/changesource/ChangeChapterSourceDialog.kt

@@ -31,6 +31,7 @@ import io.legado.app.ui.book.source.manage.BookSourceActivity
 import io.legado.app.ui.widget.recycler.VerticalDivider
 import io.legado.app.utils.*
 import io.legado.app.utils.viewbindingdelegate.viewBinding
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.launch
@@ -177,7 +178,7 @@ class ChangeChapterSourceDialog() : BaseDialogFragment(R.layout.dialog_chapter_c
             }
             binding.toolBar.menu.applyTint(requireContext())
         }
-        launch {
+        launch(Dispatchers.Default) {
             whenStarted {
                 viewModel.searchDataFlow.conflate().collect {
                     searchBookAdapter.setItems(it)

app/src/main/java/io/legado/app/ui/book/search/SearchActivity.kt

@@ -29,12 +29,9 @@ import io.legado.app.ui.book.source.manage.BookSourceActivity
 import io.legado.app.ui.widget.recycler.LoadMoreView
 import io.legado.app.utils.*
 import io.legado.app.utils.viewbindingdelegate.viewBinding
+import kotlinx.coroutines.*
 import kotlinx.coroutines.Dispatchers.IO
-import kotlinx.coroutines.Job
-import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.conflate
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 class SearchActivity : VMBaseActivity<ActivityBookSearchBinding, SearchViewModel>(),
     BookAdapter.CallBack,
@@ -198,7 +195,7 @@ class SearchActivity : VMBaseActivity<ActivityBookSearchBinding, SearchViewModel
     }
 
     private fun initData() {
-        lifecycleScope.launch {
+        lifecycleScope.launch(Dispatchers.Default) {
             whenStarted {
                 viewModel.searchDataFlow.conflate().collect {
                     adapter.setItems(it)

app/src/main/java/io/legado/app/ui/main/bookshelf/style1/books/BooksFragment.kt

@@ -5,6 +5,7 @@ import android.os.Bundle
 import android.view.View
 import androidx.core.view.isGone
 import androidx.fragment.app.activityViewModels
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -30,7 +31,6 @@ import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.flow.flowOn
 import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.launch
 import kotlin.math.max
 
 /**
@@ -105,7 +105,7 @@ class BooksFragment() : BaseFragment(R.layout.fragment_books),
 
     private fun upRecyclerData() {
         booksFlowJob?.cancel()
-        booksFlowJob = launch {
+        booksFlowJob = lifecycleScope.launchWhenStarted {
             when (groupId) {
                 AppConst.bookGroupAllId -> appDb.bookDao.flowAll()
                 AppConst.bookGroupLocalId -> appDb.bookDao.flowLocal()