优化

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

@@ -108,7 +108,11 @@ object BookHelp {
     }
 
     fun hasContent(book: Book, bookChapter: BookChapter): Boolean {
-        if (downloadUri.isDocumentUri(App.INSTANCE)) {
+        when {
+            book.isLocalBook() -> {
+                return true
+            }
+            downloadUri.isDocumentUri(App.INSTANCE) -> {
                 DocumentFile.fromTreeUri(App.INSTANCE, downloadUri)?.let { root ->
                     return DocumentUtils.exists(
                         root,
@@ -116,13 +120,15 @@ object BookHelp {
                         subDirs = *arrayOf(cacheFolderName, bookFolderName(book))
                     )
                 }
-        } else {
+            }
+            else -> {
                 return FileUtils.exists(
                     File(downloadPath),
                     "${bookChapterName(bookChapter)}.nb",
                     subDirs = *arrayOf(cacheFolderName, bookFolderName(book))
                 )
             }
+        }
         return false
     }