优化

app/src/main/java/io/legado/app/App.kt

@@ -14,6 +14,7 @@ import io.legado.app.constant.AppConst.channelIdReadAloud
 import io.legado.app.constant.AppConst.channelIdWeb
 import io.legado.app.constant.PreferKey
 import io.legado.app.data.appDb
+import io.legado.app.help.BookHelp
 import io.legado.app.help.CrashHandler
 import io.legado.app.help.LifecycleHelp
 import io.legado.app.help.RuleBigDataHelp
@@ -52,6 +53,7 @@ class App : MultiDexApplication() {
                 appDb.searchBookDao.clearExpired(clearTime)
             }
             RuleBigDataHelp.clearInvalid()
+            BookHelp.clearInvalidCache()
             //初始化简繁转换引擎
             when (AppConfig.chineseConverterType) {
                 1 -> ChineseUtils.t2s("初始化")

app/src/main/java/io/legado/app/help/BookHelp.kt

@@ -6,14 +6,11 @@ import io.legado.app.data.appDb
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookSource
-import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.model.analyzeRule.AnalyzeUrl
 import io.legado.app.model.localBook.LocalBook
 import io.legado.app.utils.*
-import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.*
-import kotlinx.coroutines.Deferred
+import kotlinx.coroutines.Dispatchers.IO
-import kotlinx.coroutines.async
-import kotlinx.coroutines.delay
 import org.apache.commons.text.similarity.JaccardSimilarity
 import splitties.init.appCtx
 import java.io.File
@@ -44,8 +41,8 @@ object BookHelp {
     /**
      * 清除已删除书的缓存
      */
-    fun clearRemovedCache() {
+    suspend fun clearInvalidCache() {
-        Coroutine.async {
+        withContext(IO) {
             val bookFolderNames = appDb.bookDao.all.map {
                 it.getFolderName()
             }

app/src/main/java/io/legado/app/ui/main/MainActivity.kt

@@ -22,6 +22,7 @@ import io.legado.app.databinding.ActivityMainBinding
 import io.legado.app.help.BookHelp
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.LocalConfig
+import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.help.storage.Backup
 import io.legado.app.lib.theme.elevation
 import io.legado.app.lib.theme.primaryColor
@@ -175,7 +176,9 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
 
     override fun onDestroy() {
         super.onDestroy()
-        BookHelp.clearRemovedCache()
+        Coroutine.async {
+            BookHelp.clearInvalidCache()
+        }
     }
 
     override fun observeLiveBus() {