diff --git a/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
index d381e410b..d9a1cdd26 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
@@ -463,7 +463,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
      */
     override fun setScreenBrightness(value: Int) {
         var brightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE
-        if (this.getPrefBoolean("brightnessAuto").not()) {
+        if (!read_menu.brightnessAuto()) {
             brightness = value.toFloat()
             if (brightness < 1f) brightness = 1f
             brightness /= 255f
diff --git a/app/src/main/java/io/legado/app/ui/readbook/ReadMenu.kt b/app/src/main/java/io/legado/app/ui/readbook/ReadMenu.kt
index 362059afc..4afcfda10 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/ReadMenu.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/ReadMenu.kt
@@ -52,7 +52,7 @@ class ReadMenu : FrameLayout {
     }
 
     private fun upBrightness() {
-        if (context.getPrefBoolean("brightnessAuto", true)) {
+        if (brightnessAuto()) {
             iv_brightness_auto.setColorFilter(context.accentColor)
             seek_brightness.isEnabled = false
         } else {
@@ -83,11 +83,15 @@ class ReadMenu : FrameLayout {
         seek_read_page.progress = dur
     }
 
+    fun brightnessAuto(): Boolean {
+        return context.getPrefBoolean("brightnessAuto", true)
+    }
+
     private fun bindEvent() {
         iv_brightness_auto.onClick {
             context.putPrefBoolean(
                 "brightnessAuto",
-                !context.getPrefBoolean("brightnessAuto", true)
+                !brightnessAuto()
             )
             upBrightness()
         }