diff --git a/app/src/main/java/io/legado/app/App.kt b/app/src/main/java/io/legado/app/App.kt
index 24bfe161d..58d6094da 100644
--- a/app/src/main/java/io/legado/app/App.kt
+++ b/app/src/main/java/io/legado/app/App.kt
@@ -86,8 +86,4 @@ class App : MultiDexApplication() {
         }
     }
 
-    companion object {
-        var navigationBarHeight = 0
-    }
-
 }
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 8f4105882..deb4a5f62 100644
--- a/app/src/main/java/io/legado/app/base/BaseActivity.kt
+++ b/app/src/main/java/io/legado/app/base/BaseActivity.kt
@@ -12,7 +12,6 @@ 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.PreferKey
@@ -100,13 +99,6 @@ abstract class BaseActivity<VB : ViewBinding>(
         observeLiveBus()
     }
 
-    override fun onWindowFocusChanged(hasFocus: Boolean) {
-        super.onWindowFocusChanged(hasFocus)
-        if (hasFocus) {
-            App.navigationBarHeight = navigationBarHeight
-        }
-    }
-
     override fun onMultiWindowModeChanged(isInMultiWindowMode: Boolean, newConfig: Configuration?) {
         super.onMultiWindowModeChanged(isInMultiWindowMode, newConfig)
         findViewById<TitleBar>(R.id.title_bar)
diff --git a/app/src/main/java/io/legado/app/ui/book/changesource/ChangeSourceDialog.kt b/app/src/main/java/io/legado/app/ui/book/changesource/ChangeSourceDialog.kt
index 392349057..c79096391 100644
--- a/app/src/main/java/io/legado/app/ui/book/changesource/ChangeSourceDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/changesource/ChangeSourceDialog.kt
@@ -4,6 +4,7 @@ import android.os.Bundle
 import android.view.*
 import androidx.appcompat.widget.SearchView
 import androidx.appcompat.widget.Toolbar
+import androidx.core.os.bundleOf
 import androidx.fragment.app.FragmentManager
 import androidx.fragment.app.viewModels
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -262,10 +263,11 @@ class ChangeSourceDialog : BaseDialogFragment(),
 
     override fun observeLiveBus() {
         observeEvent<String>(EventBus.SOURCE_CHANGED) {
-            val payload = Bundle().apply {
-                putString("upCurSource", bookUrl)
-            }
-            adapter.notifyItemRangeChanged(0, adapter.itemCount, payload)
+            adapter.notifyItemRangeChanged(
+                0,
+                adapter.itemCount,
+                bundleOf(Pair("upCurSource", bookUrl))
+            )
         }
     }
 
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 0e0152540..d5e0705db 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
@@ -150,6 +150,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
 
     override fun onWindowFocusChanged(hasFocus: Boolean) {
         super.onWindowFocusChanged(hasFocus)
+        binding.readView.upStyle()
         upSystemUiVisibility()
     }
 
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 cc4399d85..0d9c0c146 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
@@ -7,7 +7,6 @@ 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.timeFormat
@@ -85,7 +84,7 @@ 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 activity?.navigationBarHeight ?: 0
             }
         }
         contentTextView.upVisibleRect()