diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 3d5eec7c9..92ca38c84 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -1082,6 +1082,13 @@ class ReadBookActivity : BaseReadBookActivity(),
                                 putExtra("url", it)
                                 IntentData.put(it, ReadBook.bookSource?.getHeaderMap(true))
                             }
+                        } else if (it.isTrue()) {
+                            //购买成功后刷新目录
+                            ReadBook.book?.let {
+                                ReadBook.curTextChapter = null
+                                BookHelp.delContent(book, chapter)
+                                viewModel.loadChapterList(book)
+                            }
                         }
                     }.onError {
                         AppLog.putDebug(it.localizedMessage)
diff --git a/app/src/main/java/io/legado/app/utils/StringExtensions.kt b/app/src/main/java/io/legado/app/utils/StringExtensions.kt
index 898e6d3fe..60a6403a0 100644
--- a/app/src/main/java/io/legado/app/utils/StringExtensions.kt
+++ b/app/src/main/java/io/legado/app/utils/StringExtensions.kt
@@ -2,6 +2,7 @@
 
 package io.legado.app.utils
 
+import android.annotation.SuppressLint
 import android.icu.text.Collator
 import android.icu.util.ULocale
 import android.net.Uri
@@ -84,6 +85,7 @@ fun String.splitNotBlank(regex: Regex, limit: Int = 0): Array<String> = run {
     this.split(regex, limit).map { it.trim() }.filterNot { it.isBlank() }.toTypedArray()
 }
 
+@SuppressLint("ObsoleteSdkInt")
 fun String.cnCompare(other: String): Int {
     return if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
         Collator.getInstance(ULocale.SIMPLIFIED_CHINESE).compare(this, other)