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 eedf933fc..2072a45f4 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
@@ -4,8 +4,6 @@ import android.annotation.SuppressLint
 import android.app.Activity
 import android.content.Intent
 import android.content.res.Configuration
-import android.graphics.Color
-import android.graphics.drawable.ColorDrawable
 import android.os.Bundle
 import android.os.Handler
 import android.os.Looper
@@ -28,7 +26,6 @@ import io.legado.app.help.storage.SyncBookProgress
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.dialogs.noButton
 import io.legado.app.lib.dialogs.okButton
-import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.receiver.TimeBatteryReceiver
 import io.legado.app.service.BaseReadAloudService
@@ -144,21 +141,6 @@ class ReadBookActivity : ReadBookBaseActivity(),
         }
     }
 
-    override fun upNavigationBarColor() {
-        when {
-            read_menu == null -> return
-            read_menu.isVisible -> {
-                ATH.setNavigationBarColorAuto(this)
-            }
-            ReadBookConfig.bg is ColorDrawable -> {
-                ATH.setNavigationBarColorAuto(this, ReadBookConfig.bgMeanColor)
-            }
-            else -> {
-                ATH.setNavigationBarColorAuto(this, Color.BLACK)
-            }
-        }
-    }
-
     override fun onCompatCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.read_book, menu)
         return super.onCompatCreateOptionsMenu(menu)
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookBaseActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookBaseActivity.kt
index 94292bb81..47f3ac855 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookBaseActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookBaseActivity.kt
@@ -4,11 +4,14 @@ import android.annotation.SuppressLint
 import android.app.Activity
 import android.content.Intent
 import android.content.pm.ActivityInfo
+import android.graphics.Color
+import android.graphics.drawable.ColorDrawable
 import android.net.Uri
 import android.os.Build
 import android.os.Bundle
 import android.view.*
 import android.widget.EditText
+import androidx.core.view.isVisible
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
@@ -21,6 +24,7 @@ import io.legado.app.lib.dialogs.*
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.ThemeStore
 import io.legado.app.lib.theme.backgroundColor
+import io.legado.app.lib.theme.bottomBackground
 import io.legado.app.service.help.CacheBook
 import io.legado.app.service.help.ReadBook
 import io.legado.app.ui.book.read.config.BgTextConfigDialog
@@ -32,6 +36,7 @@ import io.legado.app.utils.applyTint
 import io.legado.app.utils.getPrefString
 import io.legado.app.utils.getViewModel
 import io.legado.app.utils.requestInputMethod
+import kotlinx.android.synthetic.main.activity_book_read.*
 import kotlinx.android.synthetic.main.dialog_download_choice.view.*
 import kotlinx.android.synthetic.main.dialog_edit_text.view.*
 import kotlinx.android.synthetic.main.view_read_menu.*
@@ -44,6 +49,7 @@ abstract class ReadBookBaseActivity :
     override val viewModel: ReadBookViewModel
         get() = getViewModel(ReadBookViewModel::class.java)
     private val requestCodeEditSource = 111
+    var bottomDialog = 0
 
     override fun onCreate(savedInstanceState: Bundle?) {
         ReadBook.msg = null
@@ -170,6 +176,19 @@ abstract class ReadBookBaseActivity :
         window.decorView.systemUiVisibility = flag
     }
 
+    override fun upNavigationBarColor() {
+        when {
+            read_menu == null -> return
+            read_menu.isVisible -> ATH.setNavigationBarColorAuto(this)
+            bottomDialog > 0 -> ATH.setNavigationBarColorAuto(this, bottomBackground)
+            ReadBookConfig.bg is ColorDrawable -> {
+                ATH.setNavigationBarColorAuto(this, ReadBookConfig.bgMeanColor)
+            }
+            else -> {
+                ATH.setNavigationBarColorAuto(this, Color.BLACK)
+            }
+        }
+    }
 
     /**
      * 保持亮屏
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/AutoReadDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/AutoReadDialog.kt
index fd2ef2151..9ec107b92 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/AutoReadDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/AutoReadDialog.kt
@@ -1,5 +1,6 @@
 package io.legado.app.ui.book.read.config
 
+import android.content.DialogInterface
 import android.os.Bundle
 import android.view.*
 import android.widget.SeekBar
@@ -10,6 +11,7 @@ import io.legado.app.lib.theme.bottomBackground
 import io.legado.app.lib.theme.getPrimaryTextColor
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.service.help.ReadAloud
+import io.legado.app.ui.book.read.ReadBookActivity
 import io.legado.app.utils.ColorUtils
 import kotlinx.android.synthetic.main.dialog_auto_read.*
 import org.jetbrains.anko.sdk27.listeners.onClick
@@ -19,6 +21,7 @@ class AutoReadDialog : BaseDialogFragment() {
 
     override fun onStart() {
         super.onStart()
+        (activity as ReadBookActivity).bottomDialog++
         dialog?.window?.let {
             it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
@@ -31,6 +34,11 @@ class AutoReadDialog : BaseDialogFragment() {
         }
     }
 
+    override fun onDismiss(dialog: DialogInterface) {
+        super.onDismiss(dialog)
+        (activity as ReadBookActivity).bottomDialog--
+    }
+
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
index 3e99b8b08..7da612063 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
@@ -50,6 +50,7 @@ class BgTextConfigDialog : BaseDialogFragment(), FilePickerDialog.CallBack {
 
     override fun onStart() {
         super.onStart()
+        (activity as ReadBookActivity).bottomDialog++
         dialog?.window?.let {
             it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
@@ -79,6 +80,7 @@ class BgTextConfigDialog : BaseDialogFragment(), FilePickerDialog.CallBack {
     override fun onDismiss(dialog: DialogInterface) {
         super.onDismiss(dialog)
         ReadBookConfig.save()
+        (activity as ReadBookActivity).bottomDialog--
     }
 
     private fun initView() {
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
index 9aab31fd2..b920e1784 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/MoreConfigDialog.kt
@@ -1,6 +1,7 @@
 package io.legado.app.ui.book.read.config
 
 import android.annotation.SuppressLint
+import android.content.DialogInterface
 import android.content.SharedPreferences
 import android.os.Bundle
 import android.view.*
@@ -24,6 +25,7 @@ class MoreConfigDialog : DialogFragment() {
 
     override fun onStart() {
         super.onStart()
+        (activity as ReadBookActivity).bottomDialog++
         dialog?.window?.let {
             it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
@@ -57,6 +59,11 @@ class MoreConfigDialog : DialogFragment() {
             .commit()
     }
 
+    override fun onDismiss(dialog: DialogInterface) {
+        super.onDismiss(dialog)
+        (activity as ReadBookActivity).bottomDialog--
+    }
+
     class ReadPreferenceFragment : BasePreferenceFragment(),
         SharedPreferences.OnSharedPreferenceChangeListener {
 
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudDialog.kt
index ebd5bae64..a7020fb98 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudDialog.kt
@@ -1,5 +1,6 @@
 package io.legado.app.ui.book.read.config
 
+import android.content.DialogInterface
 import android.os.Bundle
 import android.view.*
 import android.widget.SeekBar
@@ -12,6 +13,7 @@ import io.legado.app.lib.theme.getPrimaryTextColor
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.service.help.ReadAloud
 import io.legado.app.service.help.ReadBook
+import io.legado.app.ui.book.read.ReadBookActivity
 import io.legado.app.utils.ColorUtils
 import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.observeEvent
@@ -24,6 +26,7 @@ class ReadAloudDialog : BaseDialogFragment() {
 
     override fun onStart() {
         super.onStart()
+        (activity as ReadBookActivity).bottomDialog++
         dialog?.window?.let {
             it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
@@ -36,6 +39,11 @@ class ReadAloudDialog : BaseDialogFragment() {
         }
     }
 
+    override fun onDismiss(dialog: DialogInterface) {
+        super.onDismiss(dialog)
+        (activity as ReadBookActivity).bottomDialog--
+    }
+
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/ReadStyleDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/ReadStyleDialog.kt
index df5ad0474..62d629a5f 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/ReadStyleDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/ReadStyleDialog.kt
@@ -35,6 +35,7 @@ class ReadStyleDialog : BaseDialogFragment(), FontSelectDialog.CallBack {
 
     override fun onStart() {
         super.onStart()
+        (activity as ReadBookActivity).bottomDialog++
         dialog?.window?.let {
             it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
@@ -64,6 +65,7 @@ class ReadStyleDialog : BaseDialogFragment(), FontSelectDialog.CallBack {
     override fun onDismiss(dialog: DialogInterface) {
         super.onDismiss(dialog)
         ReadBookConfig.save()
+        (activity as ReadBookActivity).bottomDialog--
     }
 
     private fun initView() {