本地书籍无权限则保存到自己选定的文件夹

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

@@ -44,10 +44,12 @@ class TextFile(private val book: Book) {
                 }
                 analyze(fd, book, rulePattern)
             } finally {
+                if (fd.valid()) {
                     Os.close(fd)
                 }
             }
         }
+    }
 
     @Throws(FileNotFoundException::class)
     private fun analyze(