优化

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

@@ -8,7 +8,9 @@ import io.legado.app.constant.AppLog
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.help.book.BookHelp
-import io.legado.app.utils.*
+import io.legado.app.utils.FileUtils
+import io.legado.app.utils.HtmlFormatter
+import io.legado.app.utils.printOnDebug
 import me.ag2s.epublib.domain.EpubBook
 import me.ag2s.epublib.domain.Resource
 import me.ag2s.epublib.domain.TOCReference
@@ -143,9 +145,9 @@ class EpubFile(var book: Book) {
         }
         /*获取当前章节文本*/
         val contents = epubBookContents ?: return null
-        val nextChapterFirstResourceHref = chapter.getVariable("nextUrl")?.substringBeforeLast("#")
+        val nextChapterFirstResourceHref = chapter.getVariable("nextUrl").substringBeforeLast("#")
         val currentChapterFirstResourceHref = chapter.url.substringBeforeLast("#")
-        val isLastChapter = nextChapterFirstResourceHref.isNullOrBlank()
+        val isLastChapter = nextChapterFirstResourceHref.isBlank()
         val startFragmentId = chapter.startFragmentId
         val endFragmentId = chapter.endFragmentId
         val elements = Elements()