diff --git a/app/build.gradle b/app/build.gradle
index 43c822e3b..c2bc779e2 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -14,7 +14,7 @@ static def releaseTime() {
 }
 
 def name = "legado"
-def version = "0." + releaseTime()
+def version = "3." + releaseTime()
 def gitCommits = Integer.parseInt('git rev-list --count HEAD'.execute([], project.rootDir).text.trim())
 
 android {
diff --git a/app/src/main/assets/readConfig.json b/app/src/main/assets/readConfig.json
index 21cea9f69..ee546dc37 100644
--- a/app/src/main/assets/readConfig.json
+++ b/app/src/main/assets/readConfig.json
@@ -4,7 +4,7 @@
     "bgType": 1,
     "darkStatusIcon": true,
     "textColor": "#5E432E",
-    "textSize": 22,
+    "textSize": 24,
     "letterSpacing": 0,
     "lineSpacingExtra": 10,
     "lineSpacingMultiplier": 1.2,
@@ -14,11 +14,11 @@
     "paddingBottom": 0
   },
   {
-    "bgStr": "新羊皮纸.jpg",
-    "bgType": 1,
+    "bgStr": "#C6BAA1",
+    "bgType": 0,
     "darkStatusIcon": true,
     "textColor": "#5E432E",
-    "textSize": 22,
+    "textSize": 24,
     "letterSpacing": 0,
     "lineSpacingExtra": 10,
     "lineSpacingMultiplier": 1.2,
@@ -32,7 +32,7 @@
     "bgType": 0,
     "darkStatusIcon": false,
     "textColor": "#FFFFFF",
-    "textSize": 22,
+    "textSize": 24,
     "letterSpacing": 0,
     "lineSpacingExtra": 10,
     "lineSpacingMultiplier": 1.2,
@@ -46,7 +46,7 @@
     "bgType": 1,
     "darkStatusIcon": false,
     "textColor": "#adadad",
-    "textSize": 22,
+    "textSize": 24,
     "letterSpacing": 0,
     "lineSpacingExtra": 10,
     "lineSpacingMultiplier": 1.2,
@@ -60,7 +60,7 @@
     "bgType": 0,
     "darkStatusIcon": false,
     "textColor": "#adadad",
-    "textSize": 22,
+    "textSize": 24,
     "letterSpacing": 0,
     "lineSpacingExtra": 10,
     "lineSpacingMultiplier": 1.2,
diff --git a/app/src/main/assets/updateLog.md b/app/src/main/assets/updateLog.md
index e08399579..a669fb6a6 100644
--- a/app/src/main/assets/updateLog.md
+++ b/app/src/main/assets/updateLog.md
@@ -1,11 +1,20 @@
 ## 更新日志
 
 * 旧版数据导入教程：
-* 先在旧版阅读2.19.xxxxxx进行备份，再在新版阅读3.0的【我的】中，点击【备份与恢复】，选择【导入旧版本数据】，提示存储权限，选择允许即可导入成功。
+* 先在旧版阅读(2.x)中进行备份，然后在新版阅读(3.x)【我的】->【备份与恢复】，选择【导入旧版本数据】，提示存储权限，选择允许即可导入成功。
 * 注意：由于安卓10更改了权限策略，还需要给「允许安装其他应用」的权限才能导入源。
 
+**2019/12/12**
+* [fix]web服务停止问题
+* 默认显示沉浸式状态栏
+
+**2019/12/09**
+* [add]其他设置->清理缓存
+* [mod]调整深色模式配色，预适配Android10
+* [mod]启用web服务
+
 **2019/12/03**
-* from Celeter1、调试log修改 2、增加书源字符串分享（RSS未包含） 3、增加导出选中的源（包含书源、RSS、替换规则）
+* [by Celeter]1、调试log修改 2、增加书源字符串分享（RSS未包含） 3、增加导出选中的源（包含书源、RSS、替换规则）
 * 一键缓存
 * 修复bug
 
@@ -15,4 +24,4 @@
 * 音频添加速度调整
 * 后台朗读,长按返回,或点击按钮
 * 订阅可以隐藏
-* 优化老版本规则导入from Celeter
\ No newline at end of file
+* [by Celeter]优化老版本规则导入
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/App.kt b/app/src/main/java/io/legado/app/App.kt
index a9fbf72d4..37dd40e25 100644
--- a/app/src/main/java/io/legado/app/App.kt
+++ b/app/src/main/java/io/legado/app/App.kt
@@ -70,13 +70,13 @@ class App : Application() {
         if (isNightTheme) {
             ThemeStore.editTheme(this)
                 .primaryColor(
-                    getPrefInt("colorPrimaryNight", getCompatColor(R.color.md_blue_grey_600))
+                    getPrefInt("colorPrimaryNight", getCompatColor(R.color.md_grey_900))
                 )
                 .accentColor(
                     getPrefInt("colorAccentNight", getCompatColor(R.color.md_deep_orange_800))
                 )
                 .backgroundColor(
-                    getPrefInt("colorBackgroundNight", getCompatColor(R.color.md_grey_800))
+                    getPrefInt("colorBackgroundNight", getCompatColor(R.color.md_black_1000))
                 )
                 .apply()
         } else {
@@ -101,7 +101,6 @@ class App : Application() {
         initNightTheme()
     }
 
-
     private fun initNightTheme() {
         val targetMode = if (isNightTheme) {
             AppCompatDelegate.MODE_NIGHT_YES
@@ -111,7 +110,6 @@ class App : Application() {
         AppCompatDelegate.setDefaultNightMode(targetMode)
     }
 
-
     /**
      * 创建通知ID
      */
diff --git a/app/src/main/java/io/legado/app/constant/Bus.kt b/app/src/main/java/io/legado/app/constant/Bus.kt
index 517bafc93..395d51ec4 100644
--- a/app/src/main/java/io/legado/app/constant/Bus.kt
+++ b/app/src/main/java/io/legado/app/constant/Bus.kt
@@ -17,4 +17,5 @@ object Bus {
     const val AUDIO_PROGRESS = "audioProgress"
     const val AUDIO_SIZE = "audioSize"
     const val AUDIO_SPEED = "audioSpeed"
+    const val SHOW_RSS = "showRss"
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/constant/PreferKey.kt b/app/src/main/java/io/legado/app/constant/PreferKey.kt
index 24ac981e9..446efc0bf 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -10,4 +10,7 @@ object PreferKey {
     const val nextKey = "nextKeyCode"
     const val showRss = "showRss"
     const val bookshelfLayout = "bookshelfLayout"
+    const val recordLog = "recordLog"
+    const val processText = "process_text"
+    const val cleanCache = "cleanCache"
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/CrashHandler.kt b/app/src/main/java/io/legado/app/help/CrashHandler.kt
index a8fe0d05f..9a5c7131a 100644
--- a/app/src/main/java/io/legado/app/help/CrashHandler.kt
+++ b/app/src/main/java/io/legado/app/help/CrashHandler.kt
@@ -103,7 +103,9 @@ class CrashHandler : Thread.UncaughtExceptionHandler {
         kotlin.runCatching {
             for (field in fields) {
                 field.isAccessible = true
-                paramsMap[field.name] = field.get(null).toString()
+                field.get(null)?.toString()?.let {
+                    paramsMap[field.name] = it
+                }
             }
         }
     }
diff --git a/app/src/main/java/io/legado/app/help/FileHelp.kt b/app/src/main/java/io/legado/app/help/FileHelp.kt
index a208a74a2..5a7678563 100644
--- a/app/src/main/java/io/legado/app/help/FileHelp.kt
+++ b/app/src/main/java/io/legado/app/help/FileHelp.kt
@@ -47,7 +47,7 @@ object FileHelp {
 
         if (file.isDirectory) {
             val files = file.listFiles()
-            for (subFile in files) {
+            files?.forEach { subFile ->
                 val path = subFile.path
                 deleteFile(path)
             }
diff --git a/app/src/main/java/io/legado/app/help/IntentHelp.kt b/app/src/main/java/io/legado/app/help/IntentHelp.kt
index 815867694..d02e13392 100644
--- a/app/src/main/java/io/legado/app/help/IntentHelp.kt
+++ b/app/src/main/java/io/legado/app/help/IntentHelp.kt
@@ -21,6 +21,17 @@ object IntentHelp {
         }
     }
 
+    fun toInstallUnknown(context: Context) {
+        try {
+            val intent = Intent()
+            intent.action = "android.settings.MANAGE_UNKNOWN_APP_SOURCES"
+            intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK
+            context.startActivity(intent)
+        } catch (ignored: Exception) {
+            context.toast("无法打开设置")
+        }
+    }
+
     inline fun <reified T> servicePendingIntent(context: Context, action: String): PendingIntent? {
         return PendingIntent.getService(
             context,
diff --git a/app/src/main/java/io/legado/app/help/permission/Permissions.kt b/app/src/main/java/io/legado/app/help/permission/Permissions.kt
index e1c0893e3..236691f7f 100644
--- a/app/src/main/java/io/legado/app/help/permission/Permissions.kt
+++ b/app/src/main/java/io/legado/app/help/permission/Permissions.kt
@@ -36,10 +36,12 @@ object Permissions {
     const val WRITE_EXTERNAL_STORAGE = "android.permission.WRITE_EXTERNAL_STORAGE"
 
     object Group {
-        val CALENDAR = arrayOf(READ_CALENDAR, WRITE_CALENDAR)
+        val STORAGE = arrayOf(READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE)
 
         val CAMERA = arrayOf(Permissions.CAMERA)
 
+        val CALENDAR = arrayOf(READ_CALENDAR, WRITE_CALENDAR)
+
         val CONTACTS = arrayOf(READ_CONTACTS, WRITE_CONTACTS, GET_ACCOUNTS)
 
         val LOCATION = arrayOf(ACCESS_FINE_LOCATION, ACCESS_COARSE_LOCATION)
@@ -65,8 +67,5 @@ object Permissions {
             RECEIVE_WAP_PUSH,
             RECEIVE_MMS
         )
-
-        val STORAGE = arrayOf(READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE)
     }
-
 }
diff --git a/app/src/main/java/io/legado/app/help/storage/Backup.kt b/app/src/main/java/io/legado/app/help/storage/Backup.kt
index 2f0b040a4..7062d1951 100644
--- a/app/src/main/java/io/legado/app/help/storage/Backup.kt
+++ b/app/src/main/java/io/legado/app/help/storage/Backup.kt
@@ -20,23 +20,26 @@ object Backup {
     }
 
     val legadoPath by lazy {
-        defaultPath + File.separator + "legadoBackUp"
+        FileUtils.getSdCardPath() + File.separator + "YueDu3.0"
     }
 
     val exportPath by lazy {
         legadoPath + File.separator + "Export"
     }
 
+    private fun pbackup(path :String = legadoPath){
+        backupBookshelf(path)
+        backupBookSource(path)
+        backupRssSource(path)
+        backupReplaceRule(path)
+        backupReadConfig(path)
+        backupPreference(path)
+        WebDavHelp.backUpWebDav(path)
+    }
+
     fun backup() {
         doAsync {
-            val path = legadoPath
-            backupBookshelf(path)
-            backupBookSource(path)
-            backupRssSource(path)
-            backupReplaceRule(path)
-            backupReadConfig(path)
-            backupPreference(path)
-            WebDavHelp.backUpWebDav(path)
+            pbackup()
             uiThread {
                 App.INSTANCE.toast(R.string.backup_success)
             }
@@ -45,14 +48,7 @@ object Backup {
 
     fun autoBackup() {
         doAsync {
-            val path = legadoPath
-            backupBookshelf(path)
-            backupBookSource(path)
-            backupRssSource(path)
-            backupReplaceRule(path)
-            backupReadConfig(path)
-            backupPreference(path)
-            WebDavHelp.backUpWebDav(path)
+            pbackup()
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/help/storage/Restore.kt b/app/src/main/java/io/legado/app/help/storage/Restore.kt
index 0b8e66db5..53b040f28 100644
--- a/app/src/main/java/io/legado/app/help/storage/Restore.kt
+++ b/app/src/main/java/io/legado/app/help/storage/Restore.kt
@@ -7,6 +7,7 @@ import com.jayway.jsonpath.JsonPath
 import com.jayway.jsonpath.Option
 import com.jayway.jsonpath.ParseContext
 import io.legado.app.App
+import io.legado.app.R
 import io.legado.app.constant.AppConst
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookSource
@@ -14,8 +15,6 @@ import io.legado.app.data.entities.ReplaceRule
 import io.legado.app.data.entities.RssSource
 import io.legado.app.help.FileHelp
 import io.legado.app.help.ReadBookConfig
-import io.legado.app.help.storage.Backup.defaultPath
-import io.legado.app.help.storage.Backup.legadoPath
 import io.legado.app.utils.*
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
@@ -37,7 +36,7 @@ object Restore {
         )
     }
 
-    fun restore(path: String = legadoPath) {
+    fun restore(path: String = Backup.legadoPath) {
         doAsync {
             try {
                 val file = FileHelp.getFile(path + File.separator + "bookshelf.json")
@@ -99,14 +98,14 @@ object Restore {
                 }
                 edit.commit()
             }
-            uiThread { App.INSTANCE.toast("恢复完成") }
+            uiThread { App.INSTANCE.toast(R.string.restore_success) }
         }
     }
 
     fun importYueDuData(context: Context) {
         GlobalScope.launch(IO) {
             try {// 导入书架
-                val shelfFile = FileHelp.getFile(defaultPath + File.separator + "myBookShelf.json")
+                val shelfFile = FileHelp.getFile(Backup.defaultPath + File.separator + "myBookShelf.json")
                 val books = mutableListOf<Book>()
                 val items: List<Map<String, Any>> = jsonPath.parse(shelfFile.readText()).read("$")
                 val existingBooks = App.db.bookDao().allBookUrls.toSet()
@@ -149,12 +148,14 @@ object Restore {
                     context.toast("成功导入书籍${books.size}")
                 }
             } catch (e: Exception) {
-                context.toast("导入书籍失败\n${e.localizedMessage}")
+                withContext(Main) {
+                    context.toast("导入书籍失败\n${e.localizedMessage}")
+                }
             }
 
             try {// Book source
                 val sourceFile =
-                    FileHelp.getFile(defaultPath + File.separator + "myBookSource.json")
+                    FileHelp.getFile(Backup.defaultPath + File.separator + "myBookSource.json")
                 val bookSources = mutableListOf<BookSource>()
                 val items: List<Map<String, Any>> = jsonPath.parse(sourceFile.readText()).read("$")
                 for (item in items) {
@@ -168,12 +169,14 @@ object Restore {
                     context.toast("成功导入书源${bookSources.size}")
                 }
             } catch (e: Exception) {
-                context.toast("导入源失败\n${e.localizedMessage}")
+                withContext(Main) {
+                    context.toast("导入源失败\n${e.localizedMessage}")
+                }
             }
 
             try {// Replace rules
                 val ruleFile =
-                    FileHelp.getFile(defaultPath + File.separator + "myBookReplaceRule.json")
+                    FileHelp.getFile(Backup.defaultPath + File.separator + "myBookReplaceRule.json")
                 val replaceRules = mutableListOf<ReplaceRule>()
                 val items: List<Map<String, Any>> = jsonPath.parse(ruleFile.readText()).read("$")
                 val existingRules = App.db.replaceRuleDao().all.map { it.pattern }.toSet()
@@ -196,7 +199,9 @@ object Restore {
                     context.toast("成功导入替换规则${replaceRules.size}")
                 }
             } catch (e: Exception) {
-                context.toast("导入替换规则失败\n${e.localizedMessage}")
+                withContext(Main) {
+                    context.toast("导入替换规则失败\n${e.localizedMessage}")
+                }
             }
         }
     }
diff --git a/app/src/main/java/io/legado/app/help/storage/WebDavHelp.kt b/app/src/main/java/io/legado/app/help/storage/WebDavHelp.kt
index 7d2022b5b..a4ac7fbcc 100644
--- a/app/src/main/java/io/legado/app/help/storage/WebDavHelp.kt
+++ b/app/src/main/java/io/legado/app/help/storage/WebDavHelp.kt
@@ -18,6 +18,9 @@ import kotlin.math.min
 
 object WebDavHelp {
     private val zipFilePath = FileHelp.getCachePath() + "/backup" + ".zip"
+    private val unzipFilesPath by lazy {
+        FileHelp.getCachePath()
+    }
 
     private fun getWebDavUrl(): String? {
         var url = App.INSTANCE.getPrefString("web_dav_url")
@@ -73,8 +76,8 @@ object WebDavHelp {
             getWebDavUrl()?.let {
                 val file = WebDav(it + "legado/" + name)
                 file.downloadTo(zipFilePath, true)
-                ZipUtils.unzipFile(zipFilePath, Backup.legadoPath)
-                Restore.restore()
+                ZipUtils.unzipFile(zipFilePath, unzipFilesPath)
+                Restore.restore(unzipFilesPath)
             }
         }
     }
diff --git a/app/src/main/java/io/legado/app/service/WebService.kt b/app/src/main/java/io/legado/app/service/WebService.kt
index 012623865..b32e6d6bc 100644
--- a/app/src/main/java/io/legado/app/service/WebService.kt
+++ b/app/src/main/java/io/legado/app/service/WebService.kt
@@ -34,7 +34,6 @@ class WebService : BaseService() {
                 context.startService(intent)
             }
         }
-
     }
 
     private var httpServer: HttpServer? = null
@@ -49,6 +48,12 @@ class WebService : BaseService() {
     override fun onDestroy() {
         super.onDestroy()
         isRun = false
+        if (httpServer?.isAlive == true) {
+            httpServer?.stop()
+        }
+        if (webSocketServer?.isAlive == true) {
+            webSocketServer?.stop()
+        }
     }
 
     override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
@@ -113,4 +118,4 @@ class WebService : BaseService() {
         val notification = builder.build()
         startForeground(AppConst.notificationIdWeb, notification)
     }
-}
\ No newline at end of file
+}
diff --git a/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt b/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt
index 9b44da8bc..a4e420af1 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditActivity.kt
@@ -8,12 +8,15 @@ import androidx.lifecycle.Observer
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.data.entities.Book
+import io.legado.app.help.ImageLoader
+import io.legado.app.ui.changecover.ChangeCoverDialog
 import io.legado.app.utils.getViewModel
 import kotlinx.android.synthetic.main.activity_book_info_edit.*
-import org.jetbrains.anko.toast
+import org.jetbrains.anko.sdk27.listeners.onClick
 
 class BookInfoEditActivity :
-    VMBaseActivity<BookInfoEditViewModel>(R.layout.activity_book_info_edit) {
+    VMBaseActivity<BookInfoEditViewModel>(R.layout.activity_book_info_edit),
+    ChangeCoverDialog.CallBack {
     override val viewModel: BookInfoEditViewModel
         get() = getViewModel(BookInfoEditViewModel::class.java)
 
@@ -24,6 +27,7 @@ class BookInfoEditActivity :
                 viewModel.loadBook(it)
             }
         }
+        initEvent()
     }
 
     override fun onCompatCreateOptionsMenu(menu: Menu): Boolean {
@@ -38,28 +42,47 @@ class BookInfoEditActivity :
         return super.onCompatOptionsItemSelected(item)
     }
 
+    private fun initEvent() {
+        tv_change_cover.onClick {
+            viewModel.bookData.value?.let {
+                ChangeCoverDialog.show(supportFragmentManager, it.name, it.author)
+            }
+        }
+    }
+
     private fun upView(book: Book) {
         tie_book_name.setText(book.name)
         tie_book_author.setText(book.author)
         tie_cover_url.setText(book.getDisplayCover())
         tie_book_intro.setText(book.getDisplayIntro())
+        upCover()
+    }
+
+    private fun upCover() {
+        viewModel.book?.getDisplayCover()?.let {
+            ImageLoader.load(this, it)
+                .centerCrop()
+                .into(iv_cover)
+        }
     }
 
     private fun saveData() {
-        viewModel.bookData.value?.let { book ->
+        viewModel.book?.let { book ->
             book.name = tie_book_name.text?.toString() ?: ""
             book.author = tie_book_author.text?.toString() ?: ""
             val customCoverUrl = tie_cover_url.text?.toString()
             book.customCoverUrl = if (customCoverUrl == book.coverUrl) null else customCoverUrl
             book.customIntro = tie_book_intro.text?.toString()
-            viewModel.saveBook(book,
-                success = {
-                    setResult(Activity.RESULT_OK)
-                    finish()
-                },
-                error = {
-                    toast(it)
-                })
+            viewModel.saveBook(book) {
+                setResult(Activity.RESULT_OK)
+                finish()
+            }
         }
     }
+
+    override fun coverChangeTo(coverUrl: String) {
+        viewModel.book?.customCoverUrl = coverUrl
+        tie_cover_url.setText(coverUrl)
+        upCover()
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditViewModel.kt b/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditViewModel.kt
index a947719cd..66602c1d7 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/edit/BookInfoEditViewModel.kt
@@ -7,25 +7,23 @@ import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.Book
 
 class BookInfoEditViewModel(application: Application) : BaseViewModel(application) {
-
+    var book: Book? = null
     val bookData = MutableLiveData<Book>()
 
-
     fun loadBook(bookUrl: String) {
         execute {
-            App.db.bookDao().getBook(bookUrl)?.let {
+            book = App.db.bookDao().getBook(bookUrl)
+            book?.let {
                 bookData.postValue(it)
             }
         }
     }
 
-    fun saveBook(book: Book, success: (() -> Unit)?, error: ((msg: String) -> Unit)?) {
+    fun saveBook(book: Book, success: (() -> Unit)?) {
         execute {
             App.db.bookDao().insert(book)
         }.onSuccess {
             success?.invoke()
-        }.onError {
-            error?.invoke(it.localizedMessage)
         }
     }
 }
\ No newline at end of file
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 822ca033c..a816677f0 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
@@ -182,7 +182,7 @@ class ReadStyleDialog : DialogFragment() {
                     requireContext().putPrefInt("pageAnim", i)
                     val activity = activity
                     if (activity is ReadBookActivity) {
-                        activity.page_view.upPageAnim()
+                        activity.page_view.upPageAnim(i)
                     }
                     break
                 }
diff --git a/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverDialog.kt b/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverDialog.kt
new file mode 100644
index 000000000..f566cbbbb
--- /dev/null
+++ b/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverDialog.kt
@@ -0,0 +1,73 @@
+package io.legado.app.ui.changecover
+
+import android.os.Bundle
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.DialogFragment
+import androidx.fragment.app.FragmentManager
+import androidx.recyclerview.widget.GridLayoutManager
+import io.legado.app.R
+import io.legado.app.utils.getViewModel
+import kotlinx.android.synthetic.main.dialog_change_source.*
+
+
+class ChangeCoverDialog : DialogFragment() {
+
+    companion object {
+        const val tag = "changeCoverDialog"
+
+        fun show(manager: FragmentManager, name: String, author: String) {
+            val fragment = (manager.findFragmentByTag(tag) as? ChangeCoverDialog)
+                ?: ChangeCoverDialog().apply {
+                    val bundle = Bundle()
+                    bundle.putString("name", name)
+                    bundle.putString("author", author)
+                    arguments = bundle
+                }
+            fragment.show(manager, tag)
+        }
+    }
+
+    private var callBack: CallBack? = null
+    private lateinit var viewModel: ChangeCoverViewModel
+    private lateinit var adapter: CoverAdapter
+
+    override fun onStart() {
+        super.onStart()
+        val dm = DisplayMetrics()
+        activity?.windowManager?.defaultDisplay?.getMetrics(dm)
+        dialog?.window?.setLayout((dm.widthPixels * 0.9).toInt(), (dm.heightPixels * 0.9).toInt())
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        viewModel = getViewModel(ChangeCoverViewModel::class.java)
+        return inflater.inflate(R.layout.dialog_change_source, container)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        callBack = activity as? CallBack
+        tool_bar.setTitle(R.string.change_cover_source)
+        arguments?.let { bundle ->
+            bundle.getString("name")?.let {
+                viewModel.name = it
+            }
+            bundle.getString("author")?.let {
+                viewModel.author = it
+            }
+        }
+        recycler_view.layoutManager = GridLayoutManager(requireContext(), 3)
+        adapter = CoverAdapter(requireContext())
+        recycler_view.adapter = adapter
+    }
+
+    interface CallBack {
+        fun coverChangeTo(coverUrl: String)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverViewModel.kt b/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverViewModel.kt
new file mode 100644
index 000000000..5f12c56b2
--- /dev/null
+++ b/app/src/main/java/io/legado/app/ui/changecover/ChangeCoverViewModel.kt
@@ -0,0 +1,12 @@
+package io.legado.app.ui.changecover
+
+import android.app.Application
+import io.legado.app.base.BaseViewModel
+
+class ChangeCoverViewModel(application: Application) : BaseViewModel(application) {
+
+    var name: String = ""
+    var author: String = ""
+
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/changecover/CoverAdapter.kt b/app/src/main/java/io/legado/app/ui/changecover/CoverAdapter.kt
new file mode 100644
index 000000000..408acbeb4
--- /dev/null
+++ b/app/src/main/java/io/legado/app/ui/changecover/CoverAdapter.kt
@@ -0,0 +1,25 @@
+package io.legado.app.ui.changecover
+
+import android.content.Context
+import io.legado.app.R
+import io.legado.app.base.adapter.ItemViewHolder
+import io.legado.app.base.adapter.SimpleRecyclerAdapter
+import io.legado.app.data.entities.SearchBook
+import io.legado.app.help.ImageLoader
+import kotlinx.android.synthetic.main.item_cover.view.*
+
+class CoverAdapter(context: Context) :
+    SimpleRecyclerAdapter<SearchBook>(context, R.layout.item_cover) {
+
+    override fun convert(holder: ItemViewHolder, item: SearchBook, payloads: MutableList<Any>) {
+        with(holder.itemView) {
+            item.coverUrl?.let {
+                ImageLoader.load(context, it)
+                    .centerCrop()
+                    .into(iv_cover)
+            }
+            tv_source.text = item.originName
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/config/ConfigActivity.kt b/app/src/main/java/io/legado/app/ui/config/ConfigActivity.kt
index 52d197a08..a926a8ae2 100644
--- a/app/src/main/java/io/legado/app/ui/config/ConfigActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ConfigActivity.kt
@@ -19,7 +19,7 @@ class ConfigActivity : VMBaseActivity<ConfigViewModel>(R.layout.activity_config)
 
         when (viewModel.configType) {
             ConfigViewModel.TYPE_CONFIG -> {
-                title_bar.title = getString(R.string.setting)
+                title_bar.title = getString(R.string.other_setting)
                 val fTag = "configFragment"
                 var configFragment = supportFragmentManager.findFragmentByTag(fTag)
                 if (configFragment == null) configFragment = ConfigFragment()
diff --git a/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt
index cee764420..0410b34a6 100644
--- a/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ConfigFragment.kt
@@ -10,8 +10,10 @@ import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import io.legado.app.App
 import io.legado.app.R
+import io.legado.app.constant.Bus
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.BookHelp
+import io.legado.app.help.FileHelp
 import io.legado.app.lib.theme.ATH
 import io.legado.app.receiver.SharedReceiverActivity
 import io.legado.app.ui.filechooser.FileChooserDialog
@@ -59,6 +61,13 @@ class ConfigFragment : PreferenceFragmentCompat(),
                 mode = FileChooserDialog.DIRECTORY,
                 initPath = getPreferenceString(PreferKey.downloadPath)
             )
+            PreferKey.cleanCache -> {
+                getPreferenceString(PreferKey.downloadPath).let {
+                    FileHelp.deleteFile(it)
+                    FileHelp.getFolder(it)
+                }
+                toast(R.string.clear_cache_success)
+            }
         }
         return super.onPreferenceTreeClick(preference)
     }
@@ -69,11 +78,11 @@ class ConfigFragment : PreferenceFragmentCompat(),
                 BookHelp.upDownloadPath()
                 findPreference<Preference>(key)?.summary = getPreferenceString(key)
             }
-            "recordLog" -> LogUtils.upLevel()
-            "process_text" -> sharedPreferences?.let {
+            PreferKey.recordLog -> LogUtils.upLevel()
+            PreferKey.processText -> sharedPreferences?.let {
                 setProcessTextEnable(it.getBoolean("process_text", true))
             }
-            PreferKey.showRss -> postEvent(PreferKey.showRss, PreferKey.showRss)
+            PreferKey.showRss -> postEvent(Bus.SHOW_RSS, "unused")
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
index 642a57578..a47fb4360 100644
--- a/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt
@@ -100,18 +100,14 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
                         .setMessage("是否确认恢复？")
                         .setPositiveButton(R.string.ok) { _, _ ->
                             preferenceManager.sharedPreferences.edit()
+                                    // light mode
                                 .putInt("colorPrimary", getCompatColor(R.color.md_light_blue_500))
                                 .putInt("colorAccent", getCompatColor(R.color.md_pink_800))
                                 .putInt("colorBackground", getCompatColor(R.color.md_grey_100))
-                                .putInt(
-                                    "colorPrimaryNight",
-                                    getCompatColor(R.color.md_blue_grey_600)
-                                )
-                                .putInt(
-                                    "colorAccentNight",
-                                    getCompatColor(R.color.md_deep_orange_800)
-                                )
-                                .putInt("colorBackgroundNight", getCompatColor(R.color.md_grey_800))
+                                    // dark mode
+                                .putInt("colorPrimaryNight", getCompatColor(R.color.md_grey_900))
+                                .putInt("colorAccentNight", getCompatColor(R.color.md_deep_orange_800))
+                                .putInt("colorBackgroundNight", getCompatColor(R.color.md_black_1000))
                                 .apply()
                             App.INSTANCE.applyTheme()
                             recreateActivities()
diff --git a/app/src/main/java/io/legado/app/ui/config/WebDavConfigFragment.kt b/app/src/main/java/io/legado/app/ui/config/WebDavConfigFragment.kt
index a29c34057..9eb761712 100644
--- a/app/src/main/java/io/legado/app/ui/config/WebDavConfigFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/config/WebDavConfigFragment.kt
@@ -1,9 +1,7 @@
 package io.legado.app.ui.config
 
-import android.content.Intent
 import android.os.Build
 import android.os.Bundle
-import android.provider.Settings
 import android.text.InputType
 import android.view.View
 import androidx.preference.EditTextPreference
@@ -11,6 +9,7 @@ import androidx.preference.ListPreference
 import androidx.preference.Preference
 import androidx.preference.PreferenceFragmentCompat
 import io.legado.app.R
+import io.legado.app.help.IntentHelp
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.help.storage.Backup
@@ -21,12 +20,22 @@ import io.legado.app.lib.dialogs.noButton
 import io.legado.app.lib.dialogs.yesButton
 import io.legado.app.lib.theme.ATH
 import io.legado.app.lib.theme.accentColor
+import io.legado.app.utils.LogUtils
 import io.legado.app.utils.applyTint
 import io.legado.app.utils.getPrefString
 
 class WebDavConfigFragment : PreferenceFragmentCompat(), Preference.OnPreferenceChangeListener {
 
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        fun bindPreferenceSummaryToValue(preference: Preference?) {
+            preference?.apply {
+                onPreferenceChangeListener = this@WebDavConfigFragment
+                onPreferenceChange(
+                    this,
+                    context.getPrefString(key)
+                )
+            }
+        }
         addPreferencesFromResource(R.xml.pref_config_web_dav)
         findPreference<EditTextPreference>("web_dav_url")?.let {
             it.setOnBindEditTextListener { editText ->
@@ -82,61 +91,60 @@ class WebDavConfigFragment : PreferenceFragmentCompat(), Preference.OnPreference
         return true
     }
 
-    private fun bindPreferenceSummaryToValue(preference: Preference?) {
-        preference?.apply {
-            onPreferenceChangeListener = this@WebDavConfigFragment
-            onPreferenceChange(
-                this,
-                context.getPrefString(key)
-            )
-        }
-    }
-
     override fun onPreferenceTreeClick(preference: Preference?): Boolean {
         when (preference?.key) {
-            "web_dav_backup" -> Backup.backup()
-            "web_dav_restore" -> WebDavHelp.showRestoreDialog(requireContext())
-            "import_old" -> importOld()
-        }
-        return super.onPreferenceTreeClick(preference)
-    }
-
-    private fun importOld() {
-        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.P) {
-            val haveInstallPermission = context!!.packageManager.canRequestPackageInstalls()
-            if (haveInstallPermission) {
-                startImport()
-            } else { //没有安装外部来源应用的权限
-                alert(title = "开启权限提示") {
-                    message = "需要打开「安装外部来源应用」权限才能导入旧版数据，请去设置中开启"
+            "web_dav_backup" -> PermissionsCompat.Builder(this)
+                .addPermissions(*Permissions.Group.STORAGE)
+                .rationale(R.string.tip_perm_request_storage)
+                .onGranted { Backup.backup() }
+                .request()
+            "web_dav_restore" -> PermissionsCompat.Builder(this)
+                .addPermissions(*Permissions.Group.STORAGE)
+                .rationale(R.string.tip_perm_request_storage)
+                .onGranted {
+                    WebDavHelp.showRestoreDialog(requireContext())
+                }
+                .request()
+            "import_old" -> needInstallApps {
+                alert(title = "导入") {
+                    message = "是否导入旧版本数据"
                     yesButton {
-                        val intent = Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES)
-                        startActivityForResult(intent, 666)
+                        PermissionsCompat.Builder(this@WebDavConfigFragment)
+                            .addPermissions(*Permissions.Group.STORAGE)
+                            .rationale(R.string.tip_perm_request_storage)
+                            .onGranted {
+                                Restore.importYueDuData(requireContext())
+                            }
+                            .request()
                     }
                     noButton {
                     }
                 }.show().applyTint()
             }
-        } else {
-            startImport()
         }
+        return super.onPreferenceTreeClick(preference)
     }
 
-    private fun startImport() {
-        alert(title = "导入") {
-            message = "是否导入旧版本数据"
-            yesButton {
-                PermissionsCompat.Builder(this@WebDavConfigFragment)
-                    .addPermissions(*Permissions.Group.STORAGE)
-                    .rationale(R.string.tip_perm_request_storage)
-                    .onGranted {
-                        Restore.importYueDuData(requireContext())
-                    }
-                    .request()
-            }
-            noButton {
+    private fun needInstallApps(callback: () -> Unit) {
+
+        fun canRequestPackageInstalls() :Boolean {
+            if (Build.VERSION.SDK_INT > Build.VERSION_CODES.P) {
+                return requireContext().packageManager.canRequestPackageInstalls()
             }
-        }.show().applyTint()
+            return true
+        }
+        if (!canRequestPackageInstalls()) {
+            alert(title = "开启权限提示") {
+                message = "需要打开「安装外部来源应用」权限才能导入旧版数据，请去设置中开启"
+                yesButton {
+                    IntentHelp.toInstallUnknown(requireContext())
+                }
+                noButton {
+                }
+            }.show().applyTint()
+        } else {
+            LogUtils.d("xxx","import old")
+            callback()
+        }
     }
-
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
index 83f515a0c..1b5966efb 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
@@ -13,7 +13,6 @@ import io.legado.app.BuildConfig
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
 import io.legado.app.constant.Bus
-import io.legado.app.constant.PreferKey
 import io.legado.app.help.ActivityHelp
 import io.legado.app.help.storage.Backup
 import io.legado.app.lib.theme.ATH
@@ -45,7 +44,7 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         view_pager_main.adapter = TabFragmentPageAdapter(supportFragmentManager)
         view_pager_main.addOnPageChangeListener(this)
         bottom_navigation_view.setOnNavigationItemSelectedListener(this)
-        bottom_navigation_view.menu.findItem(R.id.menu_rss).isVisible = showRss()
+        bottom_navigation_view.menu.findItem(R.id.menu_rss).isVisible = isShowRSS
         upVersion()
     }
 
@@ -66,10 +65,10 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
             fragmentList.add(RssFragment())
             fragmentList.add(MyFragment())
         }
-        if (showRss() && fragmentList.size < 4) {
+        if (isShowRSS && fragmentList.size < 4) {
             fragmentList.add(2, RssFragment())
         }
-        if (!showRss() && fragmentList.size == 4) {
+        if (!isShowRSS && fragmentList.size == 4) {
             fragmentList.removeAt(2)
         }
     }
@@ -87,7 +86,7 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         pagePosition = position
         when (position) {
             0, 1, 3 -> bottom_navigation_view.menu.getItem(position).isChecked = true
-            2 -> if (showRss()) {
+            2 -> if (isShowRSS) {
                 bottom_navigation_view.menu.getItem(position).isChecked = true
             } else {
                 bottom_navigation_view.menu.getItem(3).isChecked = true
@@ -133,20 +132,16 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         observeEvent<String>(Bus.RECREATE) {
             recreate()
         }
-        observeEvent<String>(PreferKey.showRss) {
-            bottom_navigation_view.menu.findItem(R.id.menu_rss).isVisible = showRss()
+        observeEvent<String>(Bus.SHOW_RSS) {
+            bottom_navigation_view.menu.findItem(R.id.menu_rss).isVisible = isShowRSS
             upFragmentList()
             view_pager_main.adapter?.notifyDataSetChanged()
-            if (showRss()) {
+            if (isShowRSS) {
                 view_pager_main.setCurrentItem(3, false)
             }
         }
     }
 
-    private fun showRss(): Boolean {
-        return getPrefBoolean("showRss", true)
-    }
-
     private inner class TabFragmentPageAdapter internal constructor(fm: FragmentManager) :
         FragmentStatePagerAdapter(fm, BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT) {
 
@@ -159,7 +154,7 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         }
 
         override fun getCount(): Int {
-            return if (showRss()) 4 else 3
+            return if (isShowRSS) 4 else 3
         }
 
     }
diff --git a/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt b/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt
index b2747f97e..b84538aa1 100644
--- a/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt
+++ b/app/src/main/java/io/legado/app/ui/main/my/MyFragment.kt
@@ -16,6 +16,7 @@ import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.help.storage.Backup
 import io.legado.app.help.storage.WebDavHelp
 import io.legado.app.lib.theme.ATH
+import io.legado.app.service.WebService
 import io.legado.app.ui.about.AboutActivity
 import io.legado.app.ui.about.DonateActivity
 import io.legado.app.ui.book.source.manage.BookSourceActivity
@@ -23,7 +24,9 @@ import io.legado.app.ui.config.ConfigActivity
 import io.legado.app.ui.config.ConfigViewModel
 import io.legado.app.ui.replacerule.ReplaceRuleActivity
 import io.legado.app.utils.LogUtils
+import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.startActivity
+import io.legado.app.utils.toast
 import kotlinx.android.synthetic.main.view_title_bar.*
 import org.jetbrains.anko.startActivity
 
@@ -79,12 +82,18 @@ class MyFragment : BaseFragment(R.layout.fragment_my_config) {
             super.onPause()
         }
 
-        override fun onSharedPreferenceChanged(
-            sharedPreferences: SharedPreferences?,
-            key: String?
-        ) {
+        override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
             when (key) {
                 "isNightTheme" -> App.INSTANCE.applyDayNight()
+                "webService" -> {
+                    if (requireContext().getPrefBoolean("webService")) {
+                        WebService.start(requireContext())
+                        toast("正在启动服务\n具体信息查看通知栏")
+                    }else{
+                        WebService.stop(requireContext())
+                        toast("服务已停止")
+                    }
+                }
                 "recordLog" -> LogUtils.upLevel()
                 "downloadPath" -> BookHelp.upDownloadPath()
             }
diff --git a/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt b/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt
index 2a05969f7..ec4693ffb 100644
--- a/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/page/PageView.kt
@@ -11,7 +11,6 @@ import io.legado.app.service.help.ReadBook
 import io.legado.app.ui.widget.page.curl.CurlView
 import io.legado.app.ui.widget.page.delegate.*
 import io.legado.app.utils.activity
-import io.legado.app.utils.getPrefInt
 
 class PageView(context: Context, attrs: AttributeSet) :
     FrameLayout(context, attrs),
@@ -89,13 +88,13 @@ class PageView(context: Context, attrs: AttributeSet) :
         }
     }
 
-    fun upPageAnim() {
+    fun upPageAnim(pageAnim: Int = 0) {
         if (curlView != null) {
             removeView(curlView)
             curlView = null
         }
         pageDelegate = null
-        pageDelegate = when (context.getPrefInt("pageAnim")) {
+        pageDelegate = when (pageAnim) {
             0 -> CoverPageDelegate(this)
             1 -> SlidePageDelegate(this)
             2 -> SimulationPageDelegate(this)
diff --git a/app/src/main/java/io/legado/app/utils/ContextExtensions.kt b/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
index c51be0b80..f47a0a2a8 100644
--- a/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
+++ b/app/src/main/java/io/legado/app/utils/ContextExtensions.kt
@@ -7,11 +7,8 @@ import androidx.annotation.ColorRes
 import androidx.annotation.DrawableRes
 import androidx.core.content.ContextCompat
 import androidx.core.content.edit
-import org.jetbrains.anko.connectivityManager
 import org.jetbrains.anko.defaultSharedPreferences
 
-fun Context.isOnline() = connectivityManager.activeNetworkInfo?.isConnected == true
-
 fun Context.getPrefBoolean(key: String, defValue: Boolean = false) =
     defaultSharedPreferences.getBoolean(key, defValue)
 
@@ -67,4 +64,7 @@ val Context.isNightTheme: Boolean
     get() = getPrefBoolean("isNightTheme")
 
 val Context.isTransparentStatusBar: Boolean
-    get() = getPrefBoolean("transparentStatusBar")
\ No newline at end of file
+    get() = getPrefBoolean("transparentStatusBar", true)
+
+val Context.isShowRSS: Boolean
+   get() = getPrefBoolean("showRss", true)
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_cover.xml b/app/src/main/res/layout/item_cover.xml
new file mode 100644
index 000000000..018b5f2f8
--- /dev/null
+++ b/app/src/main/res/layout/item_cover.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:padding="16dp"
+    android:clickable="true"
+    android:focusable="true"
+    tools:ignore="UnusedAttribute">
+
+    <io.legado.app.ui.widget.image.CoverImageView
+        android:id="@+id/iv_cover"
+        android:layout_width="match_parent"
+        android:layout_height="100dp"
+        android:contentDescription="@string/img_cover"
+        android:scaleType="centerCrop"
+        android:src="@drawable/image_cover_default"
+        android:transitionName="img_cover"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:ignore="UnusedAttribute" />
+
+    <TextView
+        android:id="@+id/tv_source"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:includeFontPadding="false"
+        android:gravity="center"
+        android:singleLine="true"
+        android:text="@string/book_source"
+        android:textColor="@color/tv_text_default"
+        android:textSize="16sp"
+        app:layout_constraintLeft_toLeftOf="@+id/iv_cover"
+        app:layout_constraintRight_toRightOf="@+id/iv_cover"
+        app:layout_constraintTop_toBottomOf="@+id/iv_cover"
+        tools:ignore="RtlHardcoded,RtlSymmetry" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9e6327377..602c75ca4 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -160,6 +160,7 @@
     <string name="author_show">作者:%s</string>
     <string name="aloud_stop">朗读停止</string>
     <string name="clear_cache">清除缓存</string>
+    <string name="clear_cache_success">成功清理缓存</string>
     <string name="action_save">保存</string>
     <string name="edit_source">编辑源</string>
     <string name="edit_book_source">编辑书源</string>
@@ -202,7 +203,7 @@
     <string name="replace_rule_summary">替换规则名称</string>
     <string name="select_action">选择操作</string>
     <string name="select_all">全选</string>
-    <string name="dark_theme">暗色主题</string>
+    <string name="dark_theme">深色模式</string>
     <string name="welcome">启动页</string>
     <string name="download_start">开始下载</string>
     <string name="download_cancel">取消下载</string>
@@ -313,6 +314,7 @@
     <string name="use_to">替换范围，选填书名或者源名</string>
     <string name="menu_action_group">分组</string>
     <string name="download_path">内容缓存路径</string>
+    <string name="cleancache">清理缓存</string>
     <string name="sys_file_picker">系统文件选择器</string>
     <string name="new_version">新版本</string>
     <string name="download_update">下载更新</string>
diff --git a/app/src/main/res/xml/about.xml b/app/src/main/res/xml/about.xml
index 0391f9d86..9bf6b7b71 100644
--- a/app/src/main/res/xml/about.xml
+++ b/app/src/main/res/xml/about.xml
@@ -5,7 +5,7 @@
     <androidx.preference.Preference
         android:key="isNightTheme"
         android:title="开发人员"
-        android:summary="gedoor, Invinciblelee, atbest, Antecer, mabDc"
+        android:summary="gedoor, Invinciblelee, atbest, Antecer, mabDc, Ca1e"
         app:iconSpaceReserved="false" />
 
     <androidx.preference.Preference
diff --git a/app/src/main/res/xml/pref_config.xml b/app/src/main/res/xml/pref_config.xml
index 3e9a873b6..bc421509b 100644
--- a/app/src/main/res/xml/pref_config.xml
+++ b/app/src/main/res/xml/pref_config.xml
@@ -39,4 +39,8 @@
         android:key="recordLog"
         android:title="记录日志"
         app:iconSpaceReserved="false" />
+    <Preference
+        android:key="cleanCache"
+        android:title="@string/cleancache"
+        app:iconSpaceReserved="false" />
 </androidx.preference.PreferenceScreen>
\ No newline at end of file
diff --git a/app/src/main/res/xml/pref_config_theme.xml b/app/src/main/res/xml/pref_config_theme.xml
index 607359962..f9f3df963 100644
--- a/app/src/main/res/xml/pref_config_theme.xml
+++ b/app/src/main/res/xml/pref_config_theme.xml
@@ -4,9 +4,10 @@
 
 
     <io.legado.app.lib.theme.prefs.ATESwitchPreference
-        android:defaultValue="false"
+        android:defaultValue="true"
         android:key="transparentStatusBar"
-        android:title="@string/status_bar_immersion"
+        android:summary="@string/status_bar_immersion"
+        android:title="@string/immersion_status_bar"
         app:iconSpaceReserved="false" />
 
     <io.legado.app.lib.theme.prefs.ATESwitchPreference
@@ -57,7 +58,7 @@
         app:iconSpaceReserved="false">
 
         <io.legado.app.lib.theme.prefs.ATEColorPreference
-            android:defaultValue="@color/md_blue_grey_600"
+            android:defaultValue="@color/md_grey_900"
             android:key="colorPrimaryNight"
             android:summary="夜间，主色调"
             android:title="主色调"
@@ -73,7 +74,7 @@
             app:iconSpaceReserved="false" />
 
         <io.legado.app.lib.theme.prefs.ATEColorPreference
-            android:defaultValue="@color/md_grey_800"
+            android:defaultValue="@color/md_black_1000"
             android:key="colorBackgroundNight"
             android:summary="夜间，背景色"
             android:title="背景色"
diff --git a/app/src/main/res/xml/pref_config_web_dav.xml b/app/src/main/res/xml/pref_config_web_dav.xml
index 51234ec1a..42733f458 100644
--- a/app/src/main/res/xml/pref_config_web_dav.xml
+++ b/app/src/main/res/xml/pref_config_web_dav.xml
@@ -20,19 +20,23 @@
         android:summary="@string/web_dav_pw_s"
         app:iconSpaceReserved="false" />
 
-    <androidx.preference.Preference
-        android:key="web_dav_backup"
-        android:title="备份"
-        app:iconSpaceReserved="false" />
+    <io.legado.app.lib.theme.prefs.ATEPreferenceCategory app:iconSpaceReserved="false">
 
-    <androidx.preference.Preference
-        android:key="web_dav_restore"
-        android:title="恢复"
-        app:iconSpaceReserved="false" />
+        <androidx.preference.Preference
+            android:key="web_dav_backup"
+            android:title="备份"
+            app:iconSpaceReserved="false" />
 
-    <androidx.preference.Preference
-        android:key="import_old"
-        android:title="导入旧版本数据"
-        app:iconSpaceReserved="false" />
+        <androidx.preference.Preference
+            android:key="web_dav_restore"
+            android:title="恢复"
+            app:iconSpaceReserved="false" />
+
+        <androidx.preference.Preference
+            android:key="import_old"
+            android:title="导入旧版本数据"
+            app:iconSpaceReserved="false" />
+
+    </io.legado.app.lib.theme.prefs.ATEPreferenceCategory>
 
 </androidx.preference.PreferenceScreen>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index cb1547a01..be4632b0d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -9,7 +9,7 @@ buildscript {
         maven { url 'https://plugins.gradle.org/m2/' }
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.2'
+        classpath 'com.android.tools.build:gradle:3.5.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath 'de.timfreiheit.resourceplaceholders:placeholders:0.3'
         classpath 'com.google.gms:google-services:4.3.3'