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 cb697be77..11c2fed44 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
@@ -2,10 +2,7 @@ package io.legado.app.ui.book.read.config
 
 import android.os.Bundle
 import android.util.DisplayMetrics
-import android.view.Gravity
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
+import android.view.*
 import android.widget.SeekBar
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
@@ -14,7 +11,6 @@ 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.Help
 import io.legado.app.utils.ColorUtils
 import kotlinx.android.synthetic.main.dialog_auto_read.*
 import org.jetbrains.anko.sdk27.listeners.onClick
@@ -29,7 +25,7 @@ class AutoReadDialog : BaseDialogFragment() {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
+            it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
             it.decorView.setPadding(0, 0, 0, 0)
             val attr = it.attributes
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 d859d7685..eaaf2f4d4 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
@@ -9,10 +9,7 @@ import android.graphics.Color
 import android.net.Uri
 import android.os.Bundle
 import android.util.DisplayMetrics
-import android.view.Gravity
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
+import android.view.*
 import androidx.documentfile.provider.DocumentFile
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -50,7 +47,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
+            it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
             it.decorView.setPadding(0, 5, 0, 0)
             val attr = it.attributes
@@ -102,7 +99,7 @@ class BgTextConfigDialog : BaseDialogFragment() {
         sw_dark_status_icon.onCheckedChange { buttonView, isChecked ->
             if (buttonView?.isPressed == true) {
                 setStatusIconDark(isChecked)
-                dialog?.window?.let {
+                activity?.window?.let {
                     Help.upSystemUiVisibility(it)
                 }
             }
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 e17cb808a..1e7aa8d1c 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
@@ -4,10 +4,7 @@ import android.annotation.SuppressLint
 import android.content.SharedPreferences
 import android.os.Bundle
 import android.util.DisplayMetrics
-import android.view.Gravity
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
+import android.view.*
 import android.widget.LinearLayout
 import androidx.fragment.app.DialogFragment
 import androidx.preference.Preference
@@ -33,7 +30,7 @@ class MoreConfigDialog : DialogFragment() {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
+            it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
             it.decorView.setPadding(0, 0, 0, 0)
             val attr = it.attributes
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/PaddingConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/PaddingConfigDialog.kt
index 808306ed6..dda13716a 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/PaddingConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/PaddingConfigDialog.kt
@@ -6,11 +6,11 @@ import android.util.DisplayMetrics
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.view.WindowManager
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
 import io.legado.app.constant.EventBus
 import io.legado.app.help.ReadBookConfig
-import io.legado.app.ui.book.read.Help
 import io.legado.app.utils.postEvent
 import kotlinx.android.synthetic.main.dialog_read_padding.*
 
@@ -23,7 +23,7 @@ class PaddingConfigDialog : BaseDialogFragment() {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
+            it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             val attr = it.attributes
             attr.dimAmount = 0.0f
             it.attributes = attr
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudConfigDialog.kt
index be79b46f7..3ae466454 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/ReadAloudConfigDialog.kt
@@ -19,7 +19,6 @@ import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.backgroundColor
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.service.help.ReadAloud
-import io.legado.app.ui.book.read.Help
 import io.legado.app.utils.getPrefLong
 import io.legado.app.utils.postEvent
 
@@ -33,8 +32,8 @@ class ReadAloudConfigDialog : DialogFragment() {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
-            it.setBackgroundDrawableResource(R.color.transparent)
+
+        it.setBackgroundDrawableResource(R.color.transparent)
             it.setLayout((dm.widthPixels * 0.9).toInt(), ViewGroup.LayoutParams.WRAP_CONTENT)
         }
     }
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 1886837d1..7fcd0f26d 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
@@ -2,10 +2,7 @@ package io.legado.app.ui.book.read.config
 
 import android.os.Bundle
 import android.util.DisplayMetrics
-import android.view.Gravity
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
+import android.view.*
 import android.widget.SeekBar
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
@@ -16,7 +13,6 @@ 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.Help
 import io.legado.app.utils.ColorUtils
 import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.observeEvent
@@ -34,7 +30,7 @@ class ReadAloudDialog : BaseDialogFragment() {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
+            it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
             it.decorView.setPadding(0, 0, 0, 0)
             val attr = it.attributes
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 4c3897d06..77b789b24 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
@@ -4,10 +4,7 @@ import android.annotation.SuppressLint
 import android.content.DialogInterface
 import android.os.Bundle
 import android.util.DisplayMetrics
-import android.view.Gravity
-import android.view.LayoutInflater
-import android.view.View
-import android.view.ViewGroup
+import android.view.*
 import androidx.core.view.get
 import io.legado.app.R
 import io.legado.app.base.BaseDialogFragment
@@ -20,7 +17,6 @@ import io.legado.app.lib.theme.accentColor
 import io.legado.app.lib.theme.bottomBackground
 import io.legado.app.lib.theme.getPrimaryTextColor
 import io.legado.app.lib.theme.primaryColor
-import io.legado.app.ui.book.read.Help
 import io.legado.app.ui.book.read.ReadBookActivity
 import io.legado.app.ui.widget.font.FontSelectDialog
 import io.legado.app.utils.*
@@ -42,7 +38,7 @@ class ReadStyleDialog : BaseDialogFragment(), FontSelectDialog.CallBack {
             it.windowManager?.defaultDisplay?.getMetrics(dm)
         }
         dialog?.window?.let {
-            Help.upSystemUiVisibility(it)
+            it.clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND)
             it.setBackgroundDrawableResource(R.color.background)
             it.decorView.setPadding(0, 0, 0, 0)
             val attr = it.attributes