diff --git a/app/src/main/java/io/legado/app/base/BaseActivity.kt b/app/src/main/java/io/legado/app/base/BaseActivity.kt
index 31deca8e4..36965e86b 100644
--- a/app/src/main/java/io/legado/app/base/BaseActivity.kt
+++ b/app/src/main/java/io/legado/app/base/BaseActivity.kt
@@ -11,7 +11,6 @@ import android.view.View
 import android.widget.FrameLayout
 import androidx.appcompat.app.AppCompatActivity
 import androidx.viewbinding.ViewBinding
-import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.AppConst
 import io.legado.app.constant.Theme
@@ -82,7 +81,7 @@ abstract class BaseActivity<VB : ViewBinding>(
     override fun onWindowFocusChanged(hasFocus: Boolean) {
         super.onWindowFocusChanged(hasFocus)
         if (hasFocus) {
-            App.navigationBarHeight = navigationBarHeight
+            AppConst.navigationBarHeight = navigationBarHeight
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/constant/AppConst.kt b/app/src/main/java/io/legado/app/constant/AppConst.kt
index 0e1634219..d01e18807 100644
--- a/app/src/main/java/io/legado/app/constant/AppConst.kt
+++ b/app/src/main/java/io/legado/app/constant/AppConst.kt
@@ -18,6 +18,8 @@ object AppConst {
 
     const val UA_NAME = "User-Agent"
 
+    var navigationBarHeight = 0
+
     val SCRIPT_ENGINE: ScriptEngine by lazy {
         ScriptEngineManager().getEngineByName("rhino")
     }
diff --git a/app/src/main/java/io/legado/app/constant/Const.kt b/app/src/main/java/io/legado/app/constant/Const.kt
index 77d5be271..97e267f85 100644
--- a/app/src/main/java/io/legado/app/constant/Const.kt
+++ b/app/src/main/java/io/legado/app/constant/Const.kt
@@ -24,6 +24,4 @@ val appInfo: AppInfo by lazy {
 data class AppInfo(
     var versionCode: Long = 0L,
     var versionName: String = ""
-)
-
-var navigationBarHeight = 0
\ No newline at end of file
+)
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt b/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
index 7b621735f..753bb01a9 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
@@ -7,9 +7,9 @@ import android.view.LayoutInflater
 import android.widget.FrameLayout
 import androidx.core.view.isGone
 import androidx.core.view.isInvisible
-import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseActivity
+import io.legado.app.constant.AppConst
 import io.legado.app.constant.AppConst.timeFormat
 import io.legado.app.data.entities.Bookmark
 import io.legado.app.databinding.ViewBookPageBinding
@@ -85,7 +85,7 @@ class PageView(context: Context) : FrameLayout(context) {
             vwTopDivider.visible(it.showHeaderLine)
             vwBottomDivider.visible(it.showFooterLine)
             pageNvBar.layoutParams = pageNvBar.layoutParams.apply {
-                height = if (it.hideNavigationBar) 0 else App.navigationBarHeight
+                height = if (it.hideNavigationBar) 0 else AppConst.navigationBarHeight
             }
         }
         contentTextView.upVisibleRect()