diff --git a/app/src/main/java/io/legado/app/help/ReadBookConfig.kt b/app/src/main/java/io/legado/app/help/ReadBookConfig.kt
index 46a41c664..d2a9565ed 100644
--- a/app/src/main/java/io/legado/app/help/ReadBookConfig.kt
+++ b/app/src/main/java/io/legado/app/help/ReadBookConfig.kt
@@ -116,12 +116,12 @@ object ReadBookConfig {
             else Color.parseColor(textColor)
         }
 
-        private fun bgStr(): String {
+        fun bgStr(): String {
             return if (App.INSTANCE.isNightTheme) bgStrNight
             else bgStr
         }
 
-        private fun bgType(): Int {
+        fun bgType(): Int {
             return if (App.INSTANCE.isNightTheme) bgTypeNight
             else bgType
         }
diff --git a/app/src/main/java/io/legado/app/ui/readbook/config/ReadStyleDialog.kt b/app/src/main/java/io/legado/app/ui/readbook/config/ReadStyleDialog.kt
index ea2d59215..08e730014 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/config/ReadStyleDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/config/ReadStyleDialog.kt
@@ -216,9 +216,9 @@ class ReadStyleDialog : DialogFragment() {
                 else -> bg0
             }
             ReadBookConfig.getConfig(i).apply {
-                when (bgType) {
+                when (bgType()) {
                     2 -> {
-                        ImageLoader.load(requireContext(), bgStr)
+                        ImageLoader.load(requireContext(), bgStr())
                             .centerCrop()
                             .setAsFile(iv)
                     }