优化

app/src/main/java/io/legado/app/data/entities/Book.kt

@@ -57,6 +57,17 @@ data class Book(
         return isLocalBook() && originName.endsWith(".txt", true)
     }
 
+    override fun equals(other: Any?): Boolean {
+        if (other is Book) {
+            return other.bookUrl == bookUrl
+        }
+        return false
+    }
+
+    override fun hashCode(): Int {
+        return bookUrl.hashCode()
+    }
+
     @Ignore
     @IgnoredOnParcel
     override var variableMap: HashMap<String, String>? = null

app/src/main/java/io/legado/app/ui/book/arrange/ArrangeBookViewModel.kt

@@ -11,7 +11,7 @@ class ArrangeBookViewModel(application: Application) : BaseViewModel(application
 
     fun deleteBook(vararg book: Book) {
         execute {
-            App.db.bookDao().delete()
+            App.db.bookDao().delete(*book)
         }
     }