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 abbb5edd6..9e9f7deab 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
@@ -179,22 +179,18 @@ abstract class ReadBookBaseActivity :
     fun showDownloadDialog() {
         ReadBook.book?.let { book ->
             alert(titleResource = R.string.offline_cache) {
-                var dialogBinding: DialogDownloadChoiceBinding? = null
-                customView {
-                    LayoutInflater.from(this@ReadBookBaseActivity)
-                        .inflate(R.layout.dialog_download_choice, null)
-                        .apply {
-                            dialogBinding = DialogDownloadChoiceBinding.bind(this)
-                            setBackgroundColor(context.backgroundColor)
-                            dialogBinding!!.editStart.setText((book.durChapterIndex + 1).toString())
-                            dialogBinding!!.editEnd.setText(book.totalChapterNum.toString())
-                        }
+                val alertBinding = DialogDownloadChoiceBinding.inflate(layoutInflater).apply {
+                    root.setBackgroundColor(root.context.backgroundColor)
+                    editStart.setText((book.durChapterIndex + 1).toString())
+                    editEnd.setText(book.totalChapterNum.toString())
                 }
+                customView = alertBinding.root
                 yesButton {
-                    val start = dialogBinding!!.editStart.text?.toString()?.toInt() ?: 0
-                    val end =
-                        dialogBinding!!.editEnd.text?.toString()?.toInt() ?: book.totalChapterNum
-                    CacheBook.start(this@ReadBookBaseActivity, book.bookUrl, start - 1, end - 1)
+                    alertBinding.run {
+                        val start = editStart.text?.toString()?.toInt() ?: 0
+                        val end = editEnd.text?.toString()?.toInt() ?: book.totalChapterNum
+                        CacheBook.start(this@ReadBookBaseActivity, book.bookUrl, start - 1, end - 1)
+                    }
                 }
                 noButton()
             }.show()
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 0f4079d4f..1801c7bf3 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
@@ -104,7 +104,7 @@ class BgTextConfigDialog : BaseDialogFragment(), FilePickerDialog.CallBack {
         adapter = BgAdapter(requireContext(), secondaryTextColor)
         binding.recyclerView.adapter = adapter
         val headerView = ItemBgImageBinding.inflate(
-            LayoutInflater.from(requireContext()),
+            layoutInflater,
             binding.recyclerView,
             false
         )
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/PageKeyDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/PageKeyDialog.kt
index 94db6dda0..85ec5d31a 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/PageKeyDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/PageKeyDialog.kt
@@ -3,7 +3,6 @@ package io.legado.app.ui.book.read.config
 import android.app.Dialog
 import android.content.Context
 import android.view.KeyEvent
-import android.view.LayoutInflater
 import io.legado.app.R
 import io.legado.app.constant.PreferKey
 import io.legado.app.databinding.DialogPageKeyBinding
@@ -16,7 +15,7 @@ import org.jetbrains.anko.sdk27.listeners.onClick
 
 class PageKeyDialog(context: Context) : Dialog(context, R.style.AppTheme_AlertDialog) {
 
-    private val binding = DialogPageKeyBinding.inflate(LayoutInflater.from(context))
+    private val binding = DialogPageKeyBinding.inflate(layoutInflater)
 
     init {
         setContentView(binding.root)
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 2f8ab3ca8..43a3c053a 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
@@ -87,7 +87,7 @@ class ReadStyleDialog : BaseDialogFragment(), FontSelectDialog.CallBack {
         styleAdapter = StyleAdapter()
         rvStyle.adapter = styleAdapter
         val footerBinding =
-            ItemReadStyleBinding.inflate(LayoutInflater.from(requireContext()), rvStyle, false)
+            ItemReadStyleBinding.inflate(layoutInflater, rvStyle, false)
         footerBinding.ivStyle.setPadding(6.dp, 6.dp, 6.dp, 6.dp)
         footerBinding.ivStyle.setText(null)
         footerBinding.ivStyle.setColorFilter(textColor)
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineDialog.kt
index 9ca22fb3b..2da91bcdf 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineDialog.kt
@@ -105,8 +105,7 @@ class SpeakEngineDialog : BaseDialogFragment(), Toolbar.OnMenuItemClickListener
     private fun editHttpTTS(v: HttpTTS? = null) {
         val httpTTS = v?.copy() ?: HttpTTS()
         requireContext().alert(titleResource = R.string.speak_engine) {
-            val alertBinding =
-                DialogHttpTtsEditBinding.inflate(LayoutInflater.from(requireContext()))
+            val alertBinding = DialogHttpTtsEditBinding.inflate(layoutInflater)
             alertBinding.tvName.setText(httpTTS.name)
             alertBinding.tvUrl.setText(httpTTS.url)
             customView = alertBinding.root