fix:txt目录解析时判断空白章节bug

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

@@ -141,18 +141,17 @@ class TextFile(private val book: Book) {
                                 qyChapter.title = "前言"
                                 qyChapter.start = curOffset
                                 qyChapter.end = chapterLength.toLong()
-                                qyChapter.isVolume = mChapterContent.substringAfter(qyChapter.title).isBlank()
                                 toc.add(qyChapter)
                             }
                             //创建当前章节
                             val curChapter = BookChapter()
                             curChapter.title = matcher.group()
                             curChapter.start = chapterLength.toLong()
-                            curChapter.isVolume = mChapterContent.substringAfter(curChapter.title).isBlank()
                             toc.add(curChapter)
                         } else { //否则就block分割之后，上一个章节的剩余内容
                             //获取上一章节
                             val lastChapter = toc.last()
+                            toc.last().isVolume = mChapterContent.substringAfter(lastChapter.title).isBlank()
                             //将当前段落添加上一章去
                             lastChapter.end =
                                 lastChapter.end!! + chapterLength.toLong()
@@ -160,27 +159,25 @@ class TextFile(private val book: Book) {
                             val curChapter = BookChapter()
                             curChapter.title = matcher.group()
                             curChapter.start = lastChapter.end
-                            curChapter.isVolume = mChapterContent.substringAfter(curChapter.title).isBlank()
                             toc.add(curChapter)
                         }
                     } else {
                         if (toc.isNotEmpty()) { //获取章节内容
                             //获取上一章节
                             val lastChapter = toc.last()
+                            toc.last().isVolume = mChapterContent.substringAfter(lastChapter.title).isBlank()
                             lastChapter.end =
                                 lastChapter.start!! + chapterContent.toByteArray(charset).size.toLong()
                             //创建当前章节
                             val curChapter = BookChapter()
                             curChapter.title = matcher.group()
                             curChapter.start = lastChapter.end
-                            curChapter.isVolume = mChapterContent.substringAfter(curChapter.title).isBlank()
                             toc.add(curChapter)
                         } else { //如果章节不存在则创建章节
                             val curChapter = BookChapter()
                             curChapter.title = matcher.group()
                             curChapter.start = curOffset
                             curChapter.end = curOffset
-                            curChapter.isVolume = mChapterContent.substringAfter(curChapter.title).isBlank()
                             toc.add(curChapter)
                         }
                     }