优化

app/src/main/java/io/legado/app/model/webBook/PreciseSearch.kt

@@ -3,6 +3,7 @@ package io.legado.app.model.webBook
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookSource
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.isActive
 
 /**
  * 精准搜索
@@ -18,10 +19,12 @@ object PreciseSearch {
         bookSources.forEach { bookSource ->
             val webBook = WebBook(bookSource)
             kotlin.runCatching {
+                if (!scope.isActive) return null
                 webBook.searchBookAwait(scope, name).firstOrNull {
                     it.name == name && it.author == author
                 }?.let {
                     return if (it.tocUrl.isBlank()) {
+                        if (!scope.isActive) return null
                         webBook.getBookInfoAwait(scope, it.toBook())
                     } else {
                         it.toBook()

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfViewModel.kt

@@ -11,6 +11,7 @@ import io.legado.app.model.webBook.PreciseSearch
 import io.legado.app.model.webBook.WebBook
 import io.legado.app.utils.*
 import kotlinx.coroutines.Dispatchers.IO
+import kotlinx.coroutines.isActive
 import rxhttp.wrapper.param.RxHttp
 import rxhttp.wrapper.param.toText
 
@@ -105,6 +106,7 @@ class BookshelfViewModel(application: Application) : BaseViewModel(application)
         execute {
             val bookSources = App.db.bookSourceDao.allEnabled
             GSON.fromJsonArray<Map<String, String?>>(json)?.forEach {
+                if (!isActive) return@execute
                 val name = it["name"] ?: ""
                 val author = it["author"] ?: ""
                 if (name.isNotEmpty() && App.db.bookDao.getBook(name, author) == null) {