优化

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

@@ -48,11 +48,7 @@ abstract class DiffRecyclerAdapter<ITEM, VB : ViewBinding>(protected val context
 
     fun setItems(items: List<ITEM>?) {
         kotlin.runCatching {
-            if (items == null) {
+            asyncListDiffer.submitList(items?.toMutableList())
-                asyncListDiffer.submitList(null)
-            } else {
-                asyncListDiffer.submitList(ArrayList(items))
-            }
         }
     }
 

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

@@ -6,7 +6,7 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.widget.Toolbar
 import androidx.fragment.app.viewModels
-import androidx.lifecycle.whenStarted
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.GridLayoutManager
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
@@ -15,10 +15,8 @@ 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
 
 /**
  * 换封面
@@ -68,15 +66,13 @@ class ChangeCoverDialog() : BaseDialogFragment(R.layout.dialog_change_cover),
     }
 
     private fun initData() {
-        launch(Dispatchers.Default) {
+        lifecycleScope.launchWhenStarted {
-            whenStarted {
             viewModel.dataFlow.conflate().collect {
                 adapter.setItems(it)
                 delay(1000)
             }
         }
     }
-    }
 
     override fun observeLiveBus() {
         super.observeLiveBus()

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

@@ -9,7 +9,7 @@ import androidx.appcompat.widget.SearchView
 import androidx.appcompat.widget.Toolbar
 import androidx.core.os.bundleOf
 import androidx.fragment.app.viewModels
-import androidx.lifecycle.whenStarted
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import io.legado.app.R
@@ -29,7 +29,6 @@ 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
@@ -146,14 +145,12 @@ class ChangeBookSourceDialog() : BaseDialogFragment(R.layout.dialog_book_change_
             }
             binding.toolBar.menu.applyTint(requireContext())
         }
-        launch(Dispatchers.Default) {
+        lifecycleScope.launchWhenStarted {
-            whenStarted {
             viewModel.searchDataFlow.conflate().collect {
                 adapter.setItems(it)
                 delay(1000)
             }
         }
-        }
         launch {
             appDb.bookSourceDao.flowGroupEnabled().conflate().collect {
                 groups.clear()

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

@@ -9,7 +9,7 @@ import androidx.appcompat.widget.Toolbar
 import androidx.core.os.bundleOf
 import androidx.core.view.isVisible
 import androidx.fragment.app.viewModels
-import androidx.lifecycle.whenStarted
+import androidx.lifecycle.lifecycleScope
 import androidx.recyclerview.widget.RecyclerView
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
@@ -31,7 +31,6 @@ 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
@@ -178,14 +177,12 @@ class ChangeChapterSourceDialog() : BaseDialogFragment(R.layout.dialog_chapter_c
             }
             binding.toolBar.menu.applyTint(requireContext())
         }
-        launch(Dispatchers.Default) {
+        lifecycleScope.launchWhenStarted {
-            whenStarted {
             viewModel.searchDataFlow.conflate().collect {
                 searchBookAdapter.setItems(it)
                 delay(1000)
             }
         }
-        }
         launch {
             appDb.bookSourceDao.flowGroupEnabled().conflate().collect {
                 groups.clear()

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

@@ -11,7 +11,6 @@ import android.widget.TextView
 import androidx.activity.viewModels
 import androidx.appcompat.widget.SearchView
 import androidx.lifecycle.lifecycleScope
-import androidx.lifecycle.whenStarted
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.flexbox.FlexboxLayoutManager
@@ -29,9 +28,12 @@ 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,
@@ -195,14 +197,12 @@ class SearchActivity : VMBaseActivity<ActivityBookSearchBinding, SearchViewModel
     }
 
     private fun initData() {
-        lifecycleScope.launch(Dispatchers.Default) {
+        lifecycleScope.launchWhenStarted {
-            whenStarted {
             viewModel.searchDataFlow.conflate().collect {
                 adapter.setItems(it)
                 delay(1000)
             }
         }
-        }
         launch {
             appDb.bookSourceDao.flowGroupEnabled().conflate().collect {
                 groups.clear()