优化

app/src/main/java/io/legado/app/model/localBook/LocalBook.kt

@@ -57,9 +57,8 @@ object LocalBook {
                     }.firstOrNull()?.let {
                         getBookInputStream(it)
                     }
-                } else if (webDavUrl != null) {
+                } else if (webDavUrl != null && downloadRemoteBook(book)) {
                     // 下载远程链接
-                    downloadRemoteBook(book)
                     getBookInputStream(book)
                 } else {
                     null
@@ -90,12 +89,15 @@ object LocalBook {
             book.isEpub -> {
                 EpubFile.getChapterList(book)
             }
+
             book.isUmd -> {
                 UmdFile.getChapterList(book)
             }
+
             book.isPdf -> {
                 PdfFile.getChapterList(book)
             }
+
             else -> {
                 TextFile.getChapterList(book)
             }
@@ -117,12 +119,15 @@ object LocalBook {
                 book.isEpub -> {
                     EpubFile.getContent(book, chapter)
                 }
+
                 book.isUmd -> {
                     UmdFile.getContent(book, chapter)
                 }
+
                 book.isPdf -> {
                     PdfFile.getContent(book, chapter)
                 }
+
                 else -> {
                     TextFile.getContent(book, chapter)
                 }
@@ -218,7 +223,7 @@ object LocalBook {
         }
     }
 
-   /* 批量导入 支持自动导入压缩包的支持书籍 */
+    /* 批量导入 支持自动导入压缩包的支持书籍 */
     fun importFiles(uri: Uri): List<Book> {
         val books = mutableListOf<Book>()
         val fileDoc = FileDoc.fromUri(uri, false)
@@ -329,6 +334,7 @@ object LocalBook {
                     Base64.DEFAULT
                 )
             )
+
             else -> throw NoStackTraceException("在线导入书籍支持http/https/DataURL")
         }
         return saveBookFile(inputStream, fileName)
@@ -383,7 +389,7 @@ object LocalBook {
     }
 
     //下载book对应的远程文件 并更新Book
-    private fun downloadRemoteBook(localBook: Book) {
+    private fun downloadRemoteBook(localBook: Book): Boolean {
         val webDavUrl = localBook.getRemoteUrl()
         if (webDavUrl.isNullOrBlank()) throw NoStackTraceException("Book file is not webDav File")
         try {
@@ -415,9 +421,11 @@ object LocalBook {
                     localBook.save()
                 }
             }
+            return true
         } catch (e: Exception) {
             e.printOnDebug()
             AppLog.put("自动下载webDav书籍失败", e)
+            return false
         }
     }