diff --git a/app/src/main/java/io/legado/app/help/PendingIntentHelp.kt b/app/src/main/java/io/legado/app/help/PendingIntentHelp.kt
deleted file mode 100644
index 280469f3e..000000000
--- a/app/src/main/java/io/legado/app/help/PendingIntentHelp.kt
+++ /dev/null
@@ -1,24 +0,0 @@
-package io.legado.app.help
-
-import android.app.PendingIntent
-import android.content.Context
-import android.content.Intent
-import io.legado.app.service.TTSReadAloudService
-import io.legado.app.ui.readbook.ReadBookActivity
-
-object PendingIntentHelp {
-
-    fun readBookActivityPendingIntent(context: Context): PendingIntent {
-        val intent = Intent(context, ReadBookActivity::class.java)
-        intent.action = "readBookActivity"
-        return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
-    }
-
-    fun aloudServicePendingIntent(context: Context, actionStr: String): PendingIntent {
-        val intent = Intent(context, TTSReadAloudService::class.java)
-        intent.action = actionStr
-        return PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
-    }
-
-
-}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/ReadAloud.kt b/app/src/main/java/io/legado/app/help/ReadAloud.kt
new file mode 100644
index 000000000..f6794d64f
--- /dev/null
+++ b/app/src/main/java/io/legado/app/help/ReadAloud.kt
@@ -0,0 +1,87 @@
+package io.legado.app.help
+
+import android.content.Context
+import android.content.Intent
+import io.legado.app.constant.Action
+import io.legado.app.service.BaseReadAloudService
+import io.legado.app.service.TTSReadAloudService
+
+object ReadAloud {
+
+
+    fun play(
+        context: Context,
+        title: String,
+        subtitle: String,
+        pageIndex: Int,
+        dataKey: String,
+        play: Boolean = true
+    ) {
+        val readAloudIntent = Intent(context, TTSReadAloudService::class.java)
+        readAloudIntent.action = Action.play
+        readAloudIntent.putExtra("title", title)
+        readAloudIntent.putExtra("subtitle", subtitle)
+        readAloudIntent.putExtra("pageIndex", pageIndex)
+        readAloudIntent.putExtra("dataKey", dataKey)
+        readAloudIntent.putExtra("play", play)
+        context.startService(readAloudIntent)
+    }
+
+    fun pause(context: Context) {
+        if (BaseReadAloudService.isRun) {
+            val intent = Intent(context, TTSReadAloudService::class.java)
+            intent.action = Action.pause
+            context.startService(intent)
+        }
+    }
+
+    fun resume(context: Context) {
+        if (BaseReadAloudService.isRun) {
+            val intent = Intent(context, TTSReadAloudService::class.java)
+            intent.action = Action.resume
+            context.startService(intent)
+        }
+    }
+
+    fun stop(context: Context) {
+        if (BaseReadAloudService.isRun) {
+            val intent = Intent(context, TTSReadAloudService::class.java)
+            intent.action = Action.stop
+            context.startService(intent)
+        }
+    }
+
+    fun prevParagraph(context: Context) {
+        if (BaseReadAloudService.isRun) {
+            val intent = Intent(context, TTSReadAloudService::class.java)
+            intent.action = Action.prevParagraph
+            context.startService(intent)
+        }
+    }
+
+    fun nextParagraph(context: Context) {
+        if (BaseReadAloudService.isRun) {
+            val intent = Intent(context, TTSReadAloudService::class.java)
+            intent.action = Action.nextParagraph
+            context.startService(intent)
+        }
+    }
+
+    fun upTtsSpeechRate(context: Context) {
+        if (BaseReadAloudService.isRun) {
+            val intent = Intent(context, TTSReadAloudService::class.java)
+            intent.action = Action.upTtsSpeechRate
+            context.startService(intent)
+        }
+    }
+
+    fun setTimer(context: Context, minute: Int) {
+        if (BaseReadAloudService.isRun) {
+            val intent = Intent(context, TTSReadAloudService::class.java)
+            intent.action = Action.setTimer
+            intent.putExtra("minute", minute)
+            context.startService(intent)
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/lib/theme/ColorUtils.kt b/app/src/main/java/io/legado/app/lib/theme/ColorUtils.kt
index f3942fba4..b4a17748e 100644
--- a/app/src/main/java/io/legado/app/lib/theme/ColorUtils.kt
+++ b/app/src/main/java/io/legado/app/lib/theme/ColorUtils.kt
@@ -116,9 +116,7 @@ object ColorUtils {
             }
 
         init {
-            if (upper <= lower) {
-                throw IllegalArgumentException("must be lower < upper")
-            }
+            require(upper > lower) { "must be lower < upper" }
             setAlpha(alpha)
             setLower(lower)
             setUpper(upper)
@@ -129,10 +127,10 @@ object ColorUtils {
         }
 
         private fun setAlpha(alpha: Int) {
-            var alpha = alpha
-            if (alpha > 255) alpha = 255
-            if (alpha < 0) alpha = 0
-            this.alpha = alpha
+            var alpha1 = alpha
+            if (alpha1 > 255) alpha1 = 255
+            if (alpha1 < 0) alpha1 = 0
+            this.alpha = alpha1
         }
 
         private fun getLower(): Int {
@@ -140,9 +138,9 @@ object ColorUtils {
         }
 
         private fun setLower(lower: Int) {
-            var lower = lower
-            if (lower < 0) lower = 0
-            this.lower = lower
+            var lower1 = lower
+            if (lower1 < 0) lower1 = 0
+            this.lower = lower1
         }
 
         private fun getUpper(): Int {
@@ -150,9 +148,9 @@ object ColorUtils {
         }
 
         private fun setUpper(upper: Int) {
-            var upper = upper
-            if (upper > 255) upper = 255
-            this.upper = upper
+            var upper1 = upper
+            if (upper1 > 255) upper1 = 255
+            this.upper = upper1
         }
     }
 }
diff --git a/app/src/main/java/io/legado/app/lib/theme/prefs/ATEEditTextPreference.kt b/app/src/main/java/io/legado/app/lib/theme/prefs/ATEEditTextPreference.kt
index 935aa6289..9665e8586 100644
--- a/app/src/main/java/io/legado/app/lib/theme/prefs/ATEEditTextPreference.kt
+++ b/app/src/main/java/io/legado/app/lib/theme/prefs/ATEEditTextPreference.kt
@@ -92,9 +92,7 @@ class ATEEditTextPreference(context: Context?, attrs: AttributeSet?) : EditTextP
     protected fun onBindDialogView(view: View) {
         editText = view.findViewById(android.R.id.edit)
 
-        if (editText == null) {
-            throw IllegalStateException("Dialog view must contain an EditText with id" + " @android:id/edit")
-        }
+        checkNotNull(editText) { "Dialog view must contain an EditText with id" + " @android:id/edit" }
 
         view.findViewById<TextView>(android.R.id.message).visibility = View.GONE
 
diff --git a/app/src/main/java/io/legado/app/lib/theme/view/ATEStrokeTextView.kt b/app/src/main/java/io/legado/app/lib/theme/view/ATEStrokeTextView.kt
index 3efb796f9..d113321d9 100644
--- a/app/src/main/java/io/legado/app/lib/theme/view/ATEStrokeTextView.kt
+++ b/app/src/main/java/io/legado/app/lib/theme/view/ATEStrokeTextView.kt
@@ -7,6 +7,7 @@ import io.legado.app.R
 import io.legado.app.lib.theme.Selector
 import io.legado.app.lib.theme.ThemeStore
 import io.legado.app.utils.dp
+import io.legado.app.utils.getCompatColor
 
 class ATEStrokeTextView(context: Context, attrs: AttributeSet) : AppCompatTextView(context, attrs) {
 
@@ -14,16 +15,16 @@ class ATEStrokeTextView(context: Context, attrs: AttributeSet) : AppCompatTextVi
         background = Selector.shapeBuild()
             .setCornerRadius(1.dp)
             .setStrokeWidth(1.dp)
-            .setDisabledStrokeColor(context.resources.getColor(R.color.md_grey_500))
+            .setDisabledStrokeColor(context.getCompatColor(R.color.md_grey_500))
             .setDefaultStrokeColor(ThemeStore.textColorSecondary(context))
             .setSelectedStrokeColor(ThemeStore.accentColor(context))
-            .setPressedBgColor(context.resources.getColor(R.color.transparent30))
+            .setPressedBgColor(context.getCompatColor(R.color.transparent30))
             .create()
         setTextColor(
             Selector.colorBuild()
                 .setDefaultColor(ThemeStore.textColorSecondary(context))
                 .setSelectedColor(ThemeStore.accentColor(context))
-                .setDisabledColor(context.resources.getColor(R.color.md_grey_500))
+                .setDisabledColor(context.getCompatColor(R.color.md_grey_500))
                 .create()
         )
     }
diff --git a/app/src/main/java/io/legado/app/lib/webdav/WebDav.kt b/app/src/main/java/io/legado/app/lib/webdav/WebDav.kt
index ec1dc573e..d7419aebf 100644
--- a/app/src/main/java/io/legado/app/lib/webdav/WebDav.kt
+++ b/app/src/main/java/io/legado/app/lib/webdav/WebDav.kt
@@ -6,7 +6,8 @@ import io.legado.app.lib.webdav.http.HttpAuth
 import okhttp3.Credentials
 import okhttp3.MediaType.Companion.toMediaTypeOrNull
 import okhttp3.Request
-import okhttp3.RequestBody
+import okhttp3.RequestBody.Companion.asRequestBody
+import okhttp3.RequestBody.Companion.toRequestBody
 import okhttp3.Response
 import org.jsoup.Jsoup
 import java.io.File
@@ -132,11 +133,11 @@ constructor(url: String) {
                 .url(url)
                 // 添加RequestBody对象，可以只返回的属性。如果设为null，则会返回全部属性
                 // 注意：尽量手动指定需要返回的属性。若返回全部属性，可能后由于Prop.java里没有该属性名，而崩溃。
-                .method("PROPFIND", RequestBody.create("text/plain".toMediaTypeOrNull(), requestPropsStr))
+                .method("PROPFIND", requestPropsStr.toRequestBody("text/plain".toMediaTypeOrNull()))
 
             HttpAuth.auth?.let { request.header("Authorization", Credentials.basic(it.user, it.pass)) }
 
-            request.header("Depth", if (depth < 0) "infinity" else Integer.toString(depth))
+            request.header("Depth", if (depth < 0) "infinity" else depth.toString())
 
             return okHttpClient.newCall(request.build()).execute()
         }
@@ -212,7 +213,7 @@ constructor(url: String) {
         if (!file.exists()) return false
         val mediaType = contentType?.toMediaTypeOrNull()
         // 务必注意RequestBody不要嵌套，不然上传时内容可能会被追加多余的文件信息
-        val fileBody = RequestBody.create(mediaType, file)
+        val fileBody = file.asRequestBody(mediaType)
         getUrl()?.let {
             val request = Request.Builder()
                 .url(it)
diff --git a/app/src/main/java/io/legado/app/service/BaseReadAloudService.kt b/app/src/main/java/io/legado/app/service/BaseReadAloudService.kt
index 6164cd83c..b41fa1c54 100644
--- a/app/src/main/java/io/legado/app/service/BaseReadAloudService.kt
+++ b/app/src/main/java/io/legado/app/service/BaseReadAloudService.kt
@@ -19,8 +19,8 @@ import io.legado.app.constant.Bus
 import io.legado.app.constant.Status
 import io.legado.app.help.IntentDataHelp
 import io.legado.app.help.MediaHelp
-import io.legado.app.help.PendingIntentHelp
 import io.legado.app.receiver.MediaButtonReceiver
+import io.legado.app.ui.readbook.ReadBookActivity
 import io.legado.app.ui.widget.page.TextChapter
 import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.postEvent
@@ -32,80 +32,6 @@ abstract class BaseReadAloudService : BaseService(),
         var isRun = false
         var timeMinute: Int = 0
 
-        fun play(
-            context: Context,
-            title: String,
-            subtitle: String,
-            pageIndex: Int,
-            dataKey: String,
-            play: Boolean = true
-        ) {
-            val readAloudIntent = Intent(context, TTSReadAloudService::class.java)
-            readAloudIntent.action = Action.play
-            readAloudIntent.putExtra("title", title)
-            readAloudIntent.putExtra("subtitle", subtitle)
-            readAloudIntent.putExtra("pageIndex", pageIndex)
-            readAloudIntent.putExtra("dataKey", dataKey)
-            readAloudIntent.putExtra("play", play)
-            context.startService(readAloudIntent)
-        }
-
-        fun pause(context: Context) {
-            if (isRun) {
-                val intent = Intent(context, TTSReadAloudService::class.java)
-                intent.action = Action.pause
-                context.startService(intent)
-            }
-        }
-
-        fun resume(context: Context) {
-            if (isRun) {
-                val intent = Intent(context, TTSReadAloudService::class.java)
-                intent.action = Action.resume
-                context.startService(intent)
-            }
-        }
-
-        fun stop(context: Context) {
-            if (isRun) {
-                val intent = Intent(context, TTSReadAloudService::class.java)
-                intent.action = Action.stop
-                context.startService(intent)
-            }
-        }
-
-        fun prevParagraph(context: Context) {
-            if (isRun) {
-                val intent = Intent(context, TTSReadAloudService::class.java)
-                intent.action = Action.prevParagraph
-                context.startService(intent)
-            }
-        }
-
-        fun nextParagraph(context: Context) {
-            if (isRun) {
-                val intent = Intent(context, TTSReadAloudService::class.java)
-                intent.action = Action.nextParagraph
-                context.startService(intent)
-            }
-        }
-
-        fun upTtsSpeechRate(context: Context) {
-            if (isRun) {
-                val intent = Intent(context, TTSReadAloudService::class.java)
-                intent.action = Action.upTtsSpeechRate
-                context.startService(intent)
-            }
-        }
-
-        fun setTimer(context: Context, minute: Int) {
-            if (isRun) {
-                val intent = Intent(context, TTSReadAloudService::class.java)
-                intent.action = Action.setTimer
-                intent.putExtra("minute", minute)
-                context.startService(intent)
-            }
-        }
     }
 
     private val handler = Handler()
@@ -361,29 +287,29 @@ abstract class BaseReadAloudService : BaseService(),
             .setOngoing(true)
             .setContentTitle(nTitle)
             .setContentText(nSubtitle)
-            .setContentIntent(PendingIntentHelp.readBookActivityPendingIntent(this))
+            .setContentIntent(readBookActivityPendingIntent(this))
         if (pause) {
             builder.addAction(
                 R.drawable.ic_play_24dp,
                 getString(R.string.resume),
-                PendingIntentHelp.aloudServicePendingIntent(this, Action.resume)
+                aloudServicePendingIntent(this, Action.resume)
             )
         } else {
             builder.addAction(
                 R.drawable.ic_pause_24dp,
                 getString(R.string.pause),
-                PendingIntentHelp.aloudServicePendingIntent(this, Action.pause)
+                aloudServicePendingIntent(this, Action.pause)
             )
         }
         builder.addAction(
             R.drawable.ic_stop_black_24dp,
             getString(R.string.stop),
-            PendingIntentHelp.aloudServicePendingIntent(this, Action.stop)
+            aloudServicePendingIntent(this, Action.stop)
         )
         builder.addAction(
             R.drawable.ic_time_add_24dp,
             getString(R.string.set_timer),
-            PendingIntentHelp.aloudServicePendingIntent(this, Action.addTimer)
+            aloudServicePendingIntent(this, Action.addTimer)
         )
         builder.setStyle(
             androidx.media.app.NotificationCompat.MediaStyle()
@@ -394,4 +320,16 @@ abstract class BaseReadAloudService : BaseService(),
         val notification = builder.build()
         startForeground(112201, notification)
     }
+
+    fun readBookActivityPendingIntent(context: Context): PendingIntent {
+        val intent = Intent(context, ReadBookActivity::class.java)
+        intent.action = "readBookActivity"
+        return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+    }
+
+    fun aloudServicePendingIntent(context: Context, actionStr: String): PendingIntent {
+        val intent = Intent(context, TTSReadAloudService::class.java)
+        intent.action = actionStr
+        return PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
index a6da939f5..e8652e0a3 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt
@@ -20,6 +20,7 @@ import io.legado.app.constant.Status
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.help.IntentDataHelp
+import io.legado.app.help.ReadAloud
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.dialogs.noButton
@@ -190,7 +191,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
         when (keyCode) {
             KeyEvent.KEYCODE_BACK -> {
                 if (readAloudStatus == Status.PLAY) {
-                    BaseReadAloudService.pause(this)
+                    ReadAloud.pause(this)
                     toast(R.string.read_aloud_pause)
                     return true
                 }
@@ -450,8 +451,8 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
         }
         when (readAloudStatus) {
             Status.STOP -> readAloud()
-            Status.PLAY -> BaseReadAloudService.pause(this)
-            Status.PAUSE -> BaseReadAloudService.resume(this)
+            Status.PLAY -> ReadAloud.pause(this)
+            Status.PAUSE -> ReadAloud.resume(this)
         }
     }
 
@@ -464,7 +465,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
         if (book != null && textChapter != null) {
             val key = System.currentTimeMillis().toString()
             IntentDataHelp.putData(key, textChapter)
-            BaseReadAloudService.play(
+            ReadAloud.play(
                 this, book.name, textChapter.title,
                 viewModel.durPageIndex, key, play
             )
@@ -569,7 +570,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
                     page_view.upContent()
                     viewModel.saveRead()
                 }
-                2 -> if (!moveToNextChapter()) BaseReadAloudService.stop(this)
+                2 -> if (!moveToNextChapter()) ReadAloud.stop(this)
                 -1 -> {
                     if (viewModel.durPageIndex > 0) {
                         viewModel.durPageIndex = viewModel.durPageIndex - 1
diff --git a/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt b/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt
index 14ecccba4..0dcdeef47 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt
@@ -10,8 +10,8 @@ import io.legado.app.constant.BookType
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.help.BookHelp
+import io.legado.app.help.ReadAloud
 import io.legado.app.model.WebBook
-import io.legado.app.service.BaseReadAloudService
 import io.legado.app.ui.widget.page.TextChapter
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
@@ -332,7 +332,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
     override fun onCleared() {
         super.onCleared()
-        BaseReadAloudService.stop(context)
+        ReadAloud.stop(context)
     }
 
     interface CallBack {
diff --git a/app/src/main/java/io/legado/app/ui/readbook/config/ReadAloudDialog.kt b/app/src/main/java/io/legado/app/ui/readbook/config/ReadAloudDialog.kt
index 846d6ff15..31f07a645 100644
--- a/app/src/main/java/io/legado/app/ui/readbook/config/ReadAloudDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/readbook/config/ReadAloudDialog.kt
@@ -11,6 +11,7 @@ import androidx.fragment.app.DialogFragment
 import io.legado.app.R
 import io.legado.app.constant.Bus
 import io.legado.app.constant.Status
+import io.legado.app.help.ReadAloud
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.ui.readbook.Help
 import io.legado.app.utils.*
@@ -104,7 +105,7 @@ class ReadAloudDialog : DialogFragment() {
             override fun onStartTrackingTouch(seekBar: SeekBar?) = Unit
 
             override fun onStopTrackingTouch(seekBar: SeekBar?) {
-                BaseReadAloudService.setTimer(requireContext(), seek_timer.progress)
+                ReadAloud.setTimer(requireContext(), seek_timer.progress)
             }
         })
     }
@@ -112,11 +113,11 @@ class ReadAloudDialog : DialogFragment() {
     private fun initOnClick() {
         iv_menu.onClick { callBack?.showMenu(); dismiss() }
         iv_menu.onLongClick { callBack?.openChapterList(); true }
-        iv_stop.onClick { BaseReadAloudService.stop(requireContext()); dismiss() }
+        iv_stop.onClick { ReadAloud.stop(requireContext()); dismiss() }
         iv_play_pause.onClick { postEvent(Bus.READ_ALOUD_BUTTON, true) }
-        iv_play_prev.onClick { BaseReadAloudService.prevParagraph(requireContext()) }
+        iv_play_prev.onClick { ReadAloud.prevParagraph(requireContext()) }
         iv_play_prev.onLongClick { postEvent(Bus.TTS_TURN_PAGE, -2); true }
-        iv_play_next.onClick { BaseReadAloudService.nextParagraph(requireContext()) }
+        iv_play_next.onClick { ReadAloud.nextParagraph(requireContext()) }
         iv_play_next.onLongClick { postEvent(Bus.TTS_TURN_PAGE, 2); true }
     }
 
@@ -129,10 +130,10 @@ class ReadAloudDialog : DialogFragment() {
     }
 
     private fun upTtsSpeechRate() {
-        BaseReadAloudService.upTtsSpeechRate(requireContext())
+        ReadAloud.upTtsSpeechRate(requireContext())
         if (callBack?.readAloudStatus == Status.PLAY) {
-            BaseReadAloudService.pause(requireContext())
-            BaseReadAloudService.resume(requireContext())
+            ReadAloud.pause(requireContext())
+            ReadAloud.resume(requireContext())
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt b/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt
index 965236486..31a23f623 100644
--- a/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/image/CircleImageView.kt
@@ -18,6 +18,7 @@ import androidx.annotation.DrawableRes
 import androidx.annotation.RequiresApi
 import androidx.appcompat.widget.AppCompatImageView
 import io.legado.app.R
+import io.legado.app.utils.getCompatColor
 import kotlin.math.min
 import kotlin.math.pow
 
@@ -190,7 +191,7 @@ class CircleImageView : AppCompatImageView {
     }
 
     fun setCircleBackgroundColorResource(@ColorRes circleBackgroundRes: Int) {
-        circleBackgroundColor = context.resources.getColor(circleBackgroundRes)
+        circleBackgroundColor = context.getCompatColor(circleBackgroundRes)
     }
 
     override fun setImageBitmap(bm: Bitmap) {