diff --git a/app/src/main/assets/updateLog.md b/app/src/main/assets/updateLog.md
index 630769a92..b8633fd1f 100644
--- a/app/src/main/assets/updateLog.md
+++ b/app/src/main/assets/updateLog.md
@@ -2,6 +2,15 @@
 * 旧版数据导入教程：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】。
 * 请关注[开源阅读软件]()支持我,同时关注合作公众号[小说拾遗](),阅读公众号小编。
 
+**2020/03/04**
+* 修复仿真翻页动画
+* 添加阅读记录同步,正常退出进入软件时同步阅读记录
+
+**2020/03/03**
+* 修复bug
+* 优化排版,确保段距为0时每行在相同的位置
+* 修复底部遮挡
+
 **2020/03/02**
 * 添加书源登录
 * 替换规则实时生效
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 72d8c6b15..b427f687b 100644
--- a/app/src/main/java/io/legado/app/constant/PreferKey.kt
+++ b/app/src/main/java/io/legado/app/constant/PreferKey.kt
@@ -32,6 +32,7 @@ object PreferKey {
     const val webDavUrl = "web_dav_url"
     const val webDavAccount = "web_dav_account"
     const val webDavPassword = "web_dav_password"
+    const val webDavCreateDir = "webDavCreateDir"
     const val changeSourceLoadToc = "changeSourceLoadToc"
     const val chineseConverterType = "chineseConverterType"
     const val launcherIcon = "launcherIcon"
diff --git a/app/src/main/java/io/legado/app/data/dao/BookDao.kt b/app/src/main/java/io/legado/app/data/dao/BookDao.kt
index b0c07339c..f25d76be5 100644
--- a/app/src/main/java/io/legado/app/data/dao/BookDao.kt
+++ b/app/src/main/java/io/legado/app/data/dao/BookDao.kt
@@ -4,6 +4,7 @@ import androidx.lifecycle.LiveData
 import androidx.room.*
 import io.legado.app.constant.BookType
 import io.legado.app.data.entities.Book
+import io.legado.app.data.entities.BookProgress
 
 @Dao
 interface BookDao {
@@ -67,4 +68,23 @@ interface BookDao {
 
     @Query("update books set `group` = :newGroupId where `group` = :oldGroupId")
     fun upGroup(oldGroupId: Int, newGroupId: Int)
+
+    @get:Query("select bookUrl, durChapterIndex, durChapterPos, durChapterTime, durChapterTitle from books")
+    val allBookProgress: List<BookProgress>
+
+    @Query(
+        """
+        update books set 
+        durChapterIndex = :durChapterIndex, durChapterPos = :durChapterPos, 
+        durChapterTime = :durChapterTime, durChapterTitle = :durChapterTitle
+        where bookUrl = :bookUrl and durChapterTime < :durChapterTime
+    """
+    )
+    fun upBookProgress(
+        bookUrl: String,
+        durChapterIndex: Int,
+        durChapterPos: Int,
+        durChapterTime: Long,
+        durChapterTitle: String?
+    )
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/data/entities/BookProgress.kt b/app/src/main/java/io/legado/app/data/entities/BookProgress.kt
new file mode 100644
index 000000000..c0d693284
--- /dev/null
+++ b/app/src/main/java/io/legado/app/data/entities/BookProgress.kt
@@ -0,0 +1,9 @@
+package io.legado.app.data.entities
+
+data class BookProgress(
+    val bookUrl: String,
+    val durChapterIndex: Int,
+    val durChapterPos: Int,
+    val durChapterTime: Long,
+    val durChapterTitle: String?
+)
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/ReadBookConfig.kt b/app/src/main/java/io/legado/app/help/ReadBookConfig.kt
index a3a6de521..0801f88dd 100644
--- a/app/src/main/java/io/legado/app/help/ReadBookConfig.kt
+++ b/app/src/main/java/io/legado/app/help/ReadBookConfig.kt
@@ -27,6 +27,7 @@ object ReadBookConfig {
     val durConfig get() = getConfig(styleSelect)
     private val shareConfig get() = getConfig(5)
     var bg: Drawable? = null
+    var bgMeanColor: Int = 0
 
     init {
         upConfig()
@@ -68,6 +69,13 @@ object ReadBookConfig {
         val width = dm.widthPixels
         val height = dm.heightPixels
         bg = durConfig.bgDrawable(width, height)
+        bg?.let {
+            if (it is BitmapDrawable) {
+                bgMeanColor = BitmapUtils.getMeanColor(it.bitmap)
+            } else if (it is ColorDrawable) {
+                bgMeanColor = it.color
+            }
+        }
     }
 
     fun save() {
diff --git a/app/src/main/java/io/legado/app/help/storage/SyncBookProgress.kt b/app/src/main/java/io/legado/app/help/storage/SyncBookProgress.kt
new file mode 100644
index 000000000..ddb4d6ef5
--- /dev/null
+++ b/app/src/main/java/io/legado/app/help/storage/SyncBookProgress.kt
@@ -0,0 +1,50 @@
+package io.legado.app.help.storage
+
+import io.legado.app.App
+import io.legado.app.data.entities.BookProgress
+import io.legado.app.help.coroutine.Coroutine
+import io.legado.app.lib.webdav.WebDav
+import io.legado.app.utils.FileUtils
+import io.legado.app.utils.GSON
+import io.legado.app.utils.fromJsonArray
+
+@Suppress("BlockingMethodInNonBlockingContext")
+object SyncBookProgress {
+    const val fileName = "bookProgress.json"
+    private val file = FileUtils.createFileIfNotExist(App.INSTANCE.cacheDir, fileName)
+    private val webDavUrl = "${WebDavHelp.rootWebDavUrl}$fileName"
+
+    fun uploadBookProgress() {
+        Coroutine.async {
+            val value = App.db.bookDao().allBookProgress
+            if (value.isNotEmpty()) {
+                val json = GSON.toJson(value)
+                file.writeText(json)
+                if (WebDavHelp.initWebDav()) {
+                    WebDav(webDavUrl).upload(file.absolutePath)
+                }
+            }
+        }
+    }
+
+    fun downloadBookProgress() {
+        Coroutine.async {
+            if (WebDavHelp.initWebDav()) {
+                WebDav(webDavUrl).downloadTo(file.absolutePath, true)
+                if (file.exists()) {
+                    val json = file.readText()
+                    GSON.fromJsonArray<BookProgress>(json)?.forEach {
+                        App.db.bookDao().upBookProgress(
+                            it.bookUrl,
+                            it.durChapterIndex,
+                            it.durChapterPos,
+                            it.durChapterTime,
+                            it.durChapterTitle
+                        )
+                    }
+                }
+            }
+        }
+    }
+
+}
\ No newline at end of file
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 a1386f9f7..50857893d 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
@@ -10,6 +10,7 @@ import io.legado.app.lib.webdav.WebDav
 import io.legado.app.lib.webdav.http.HttpAuth
 import io.legado.app.utils.FileUtils
 import io.legado.app.utils.ZipUtils
+import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.getPrefString
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
@@ -25,31 +26,36 @@ object WebDavHelp {
     private const val defaultWebDavUrl = "https://dav.jianguoyun.com/dav/"
     private val zipFilePath = "${FileUtils.getCachePath()}${File.separator}backup.zip"
 
-    private fun getWebDavUrl(): String {
+    val rootWebDavUrl: String
+        get() {
         var url = App.INSTANCE.getPrefString(PreferKey.webDavUrl)
         if (url.isNullOrEmpty()) {
             url = defaultWebDavUrl
         }
-        if (!url.endsWith("/")) url += "/"
+            if (!url.endsWith("/")) url = "${url}/"
+            if (App.INSTANCE.getPrefBoolean(PreferKey.webDavCreateDir, true)) {
+                url = "${url}legado/"
+            }
         return url
     }
 
-    private fun initWebDav(): Boolean {
+    fun initWebDav(): Boolean {
         val account = App.INSTANCE.getPrefString(PreferKey.webDavAccount)
         val password = App.INSTANCE.getPrefString(PreferKey.webDavPassword)
         if (!account.isNullOrBlank() && !password.isNullOrBlank()) {
             HttpAuth.auth = HttpAuth.Auth(account, password)
+            WebDav(rootWebDavUrl).makeAsDir()
             return true
         }
         return false
     }
 
     private fun getWebDavFileNames(): ArrayList<String> {
-        val url = getWebDavUrl()
+        val url = rootWebDavUrl
         val names = arrayListOf<String>()
         if (initWebDav()) {
             try {
-                var files = WebDav(url + "legado/").listFiles()
+                var files = WebDav(url).listFiles()
                 files = files.reversed()
                 for (index: Int in 0 until min(10, files.size)) {
                     files[index].displayName?.let {
@@ -81,12 +87,16 @@ object WebDavHelp {
 
     private fun restoreWebDav(name: String, success: () -> Unit) {
         Coroutine.async {
-            getWebDavUrl().let {
-                val file = WebDav(it + "legado/" + name)
-                file.downloadTo(zipFilePath, true)
-                @Suppress("BlockingMethodInNonBlockingContext")
-                ZipUtils.unzipFile(zipFilePath, Backup.backupPath)
-                Restore.restore(Backup.backupPath)
+            rootWebDavUrl.let {
+                if (name == SyncBookProgress.fileName) {
+                    SyncBookProgress.downloadBookProgress()
+                } else {
+                    val webDav = WebDav(it + name)
+                    webDav.downloadTo(zipFilePath, true)
+                    @Suppress("BlockingMethodInNonBlockingContext")
+                    ZipUtils.unzipFile(zipFilePath, Backup.backupPath)
+                    Restore.restore(Backup.backupPath)
+                }
             }
         }.onSuccess {
             success.invoke()
@@ -102,10 +112,9 @@ object WebDavHelp {
                 }
                 FileUtils.deleteFile(zipFilePath)
                 if (ZipUtils.zipFiles(paths, zipFilePath)) {
-                    WebDav(getWebDavUrl() + "legado").makeAsDir()
-                    val putUrl = getWebDavUrl() + "legado/backup" +
-                            SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
-                                .format(Date(System.currentTimeMillis())) + ".zip"
+                    val backupDate = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
+                        .format(Date(System.currentTimeMillis()))
+                    val putUrl = "${rootWebDavUrl}backup${backupDate}.zip"
                     WebDav(putUrl).upload(zipFilePath)
                 }
             }
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 32b79ce79..47aa59344 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
@@ -202,7 +202,6 @@ constructor(urlStr: String) {
      * 上传文件
      */
     @Throws(IOException::class)
-    @JvmOverloads
     fun upload(localPath: String, contentType: String? = null): Boolean {
         val file = File(localPath)
         if (!file.exists()) return false
diff --git a/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt b/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
index c58410cd7..9a893b8a3 100644
--- a/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/LocalBook.kt
@@ -30,15 +30,16 @@ object LocalBook {
     }
 
     fun deleteBook(book: Book, deleteOriginal: Boolean) {
-        if (book.isTxt()) {
-            val bookFile =
-                FileUtils.getFile(AnalyzeTxtFile.cacheFolder, book.originName, subDirs = *arrayOf())
-            bookFile.delete()
-        }
+        kotlin.runCatching {
+            if (book.isTxt()) {
+                val bookFile = FileUtils.getFile(AnalyzeTxtFile.cacheFolder, book.originName)
+                bookFile.delete()
+            }
 
-        if (deleteOriginal) {
-            val uri = Uri.parse(book.bookUrl)
-            DocumentFile.fromSingleUri(App.INSTANCE, uri)?.delete()
+            if (deleteOriginal) {
+                val uri = Uri.parse(book.bookUrl)
+                DocumentFile.fromSingleUri(App.INSTANCE, uri)?.delete()
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
index 782b538ee..d20cf203b 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
@@ -21,8 +21,6 @@ import io.legado.app.help.BlurTransformation
 import io.legado.app.help.ImageLoader
 import io.legado.app.help.IntentDataHelp
 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.ui.audio.AudioPlayActivity
 import io.legado.app.ui.book.changecover.ChangeCoverDialog
 import io.legado.app.ui.book.changesource.ChangeSourceDialog
@@ -232,17 +230,17 @@ class BookInfoActivity :
                     titleResource = R.string.sure,
                     messageResource = R.string.sure_delete_book_file
                 ) {
-                    okButton {
+                    positiveButton(R.string.yes) {
                         viewModel.delBook(true) {
                             finish()
                         }
                     }
-                    noButton {
+                    negativeButton(R.string.no) {
                         viewModel.delBook(false) {
                             finish()
                         }
                     }
-                }
+                }.show()
             } else {
                 viewModel.delBook {
                     upTvBookshelf()
diff --git a/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt b/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
index 0364696a6..485d704ce 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/BookInfoViewModel.kt
@@ -202,12 +202,12 @@ class BookInfoViewModel(application: Application) : BaseViewModel(application) {
     fun delBook(deleteOriginal: Boolean = false, success: (() -> Unit)? = null) {
         execute {
             bookData.value?.let {
+                App.db.bookDao().delete(it)
+                inBookshelf = false
                 if (it.isLocalBook()) {
                     LocalBook.deleteBook(it, deleteOriginal)
                 }
-                App.db.bookDao().delete(it)
             }
-            inBookshelf = false
         }.onSuccess {
             success?.invoke()
         }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/ChapterProvider.kt b/app/src/main/java/io/legado/app/ui/book/read/page/ChapterProvider.kt
index 430db0e53..bc9dfc6e1 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/ChapterProvider.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/ChapterProvider.kt
@@ -28,7 +28,7 @@ object ChapterProvider {
     var visibleHeight = 0
     var visibleRight = 0
     var visibleBottom = 0
-    private var lineSpacingExtra = 0f
+    private var lineSpacingExtra = 0
     private var paragraphSpacing = 0
     var typeface: Typeface = Typeface.SANS_SERIF
     var titlePaint = TextPaint()
@@ -51,7 +51,7 @@ object ChapterProvider {
         val pageLengths = arrayListOf<Int>()
         val stringBuilder = StringBuilder()
         var surplusText = content
-        var durY = 0
+        var durY = 0f
         textPages.add(TextPage())
         while (surplusText.isNotEmpty()) {
             if (textPages.first().textLines.isEmpty()) {
@@ -60,7 +60,9 @@ object ChapterProvider {
                 if (end > 0) {
                     val title = surplusText.substring(0, end)
                     surplusText = surplusText.substring(end + 1)
-                    durY = joinTitle(title, durY, textPages, pageLines, pageLengths, stringBuilder)
+                    durY = setTypeText(
+                        title, durY, textPages, pageLines, pageLengths, stringBuilder, true
+                    )
                 }
             } else {
                 //正文
@@ -73,7 +75,8 @@ object ChapterProvider {
                     text = surplusText
                     surplusText = ""
                 }
-                durY = joinBody(text, durY, textPages, pageLines, pageLengths, stringBuilder)
+                durY =
+                    setTypeText(text, durY, textPages, pageLines, pageLengths, stringBuilder, false)
             }
         }
         textPages.last().height = durY + 20.dp
@@ -103,116 +106,59 @@ object ChapterProvider {
     }
 
     /**
-     * 标题
+     * 排版文字
      */
-    private fun joinTitle(
-        title: String,
-        y: Int,
-        textPages: ArrayList<TextPage>,
-        pageLines: ArrayList<Int>,
-        pageLengths: ArrayList<Int>,
-        stringBuilder: StringBuilder
-    ): Int {
-        var durY = y
-        val layout = StaticLayout(
-            title, titlePaint, visibleWidth,
-            Layout.Alignment.ALIGN_NORMAL, 1f, lineSpacingExtra, true
-        )
-        for (lineIndex in 0 until layout.lineCount) {
-            textPages.last().height = durY
-            val textLine = TextLine(isTitle = true)
-            if (durY + layout.getLineBaseline(lineIndex) - layout.getLineTop(lineIndex)
-                + contentPaint.fontMetrics.descent < visibleHeight
-            ) {
-                textPages.last().textLines.add(textLine)
-                durY = durY + layout.getLineBottom(lineIndex) - layout.getLineTop(lineIndex)
-            } else {
-                textPages.last().text = stringBuilder.toString()
-                stringBuilder.clear()
-                pageLines.add(textPages.last().textLines.size)
-                pageLengths.add(textPages.last().text.length)
-                //新页面
-                durY = layout.getLineBottom(lineIndex) - layout.getLineTop(lineIndex)
-                textPages.add(TextPage())
-                textPages.last().textLines.add(textLine)
-            }
-            textLine.lineTop = (paddingTop + durY -
-                    (layout.getLineBottom(lineIndex) - layout.getLineTop(lineIndex))).toFloat()
-            textLine.lineBase = (paddingTop + durY -
-                    (layout.getLineBottom(lineIndex) - layout.getLineBaseline(lineIndex))).toFloat()
-            textLine.lineBottom = textLine.lineBase + contentPaint.fontMetrics.descent
-            val words =
-                title.substring(layout.getLineStart(lineIndex), layout.getLineEnd(lineIndex))
-            stringBuilder.append(words)
-            textLine.text = words
-            val desiredWidth = layout.getLineWidth(lineIndex)
-            if (lineIndex != layout.lineCount - 1) {
-                addCharsToLineMiddle(textLine, words, titlePaint, desiredWidth, 0f)
-            } else {
-                //最后一行
-                val x = if (ReadBookConfig.titleCenter)
-                    (visibleWidth - layout.getLineWidth(lineIndex)) / 2
-                else 0f
-                addCharsToLineLast(textLine, words, stringBuilder, titlePaint, x)
-            }
-        }
-        durY += paragraphSpacing
-        return durY
-    }
-
-    /**
-     * 正文
-     */
-    private fun joinBody(
+    private fun setTypeText(
         text: String,
-        y: Int,
+        y: Float,
         textPages: ArrayList<TextPage>,
         pageLines: ArrayList<Int>,
         pageLengths: ArrayList<Int>,
-        stringBuilder: StringBuilder
-    ): Int {
+        stringBuilder: StringBuilder,
+        isTitle: Boolean
+    ): Float {
         var durY = y
+        val textPaint = if (isTitle) titlePaint else contentPaint
         val layout = StaticLayout(
-            text, contentPaint, visibleWidth,
-            Layout.Alignment.ALIGN_NORMAL, 1f, lineSpacingExtra, true
+            text, textPaint, visibleWidth,
+            Layout.Alignment.ALIGN_NORMAL, 0f, 0f, true
         )
         for (lineIndex in 0 until layout.lineCount) {
             textPages.last().height = durY
-            val textLine = TextLine()
-            if (durY + layout.getLineBaseline(lineIndex) - layout.getLineTop(lineIndex)
-                + contentPaint.fontMetrics.descent < visibleHeight
-            ) {
+            val textLine = TextLine(isTitle = isTitle)
+            if (durY + textPaint.textHeight < visibleHeight) {
                 textPages.last().textLines.add(textLine)
-                durY = durY + layout.getLineBottom(lineIndex) - layout.getLineTop(lineIndex)
+                durY += textPaint.textHeight + lineSpacingExtra
             } else {
                 textPages.last().text = stringBuilder.toString()
                 stringBuilder.clear()
                 pageLines.add(textPages.last().textLines.size)
                 pageLengths.add(textPages.last().text.length)
                 //新页面
-                durY = layout.getLineBottom(lineIndex) - layout.getLineTop(lineIndex)
+                durY = textPaint.textHeight + lineSpacingExtra
                 textPages.add(TextPage())
                 textPages.last().textLines.add(textLine)
             }
-            textLine.lineTop = (paddingTop + durY -
-                    (layout.getLineBottom(lineIndex) - layout.getLineTop(lineIndex))).toFloat()
-            textLine.lineBase = (paddingTop + durY -
-                    (layout.getLineBottom(lineIndex) - layout.getLineBaseline(lineIndex))).toFloat()
-            textLine.lineBottom = textLine.lineBase + contentPaint.fontMetrics.descent
+            textLine.lineBottom = paddingTop + durY - lineSpacingExtra
+            textLine.lineBase = textLine.lineBottom - textPaint.fontMetrics.descent
+            textLine.lineTop = textLine.lineBottom - textPaint.textHeight
             val words =
                 text.substring(layout.getLineStart(lineIndex), layout.getLineEnd(lineIndex))
             stringBuilder.append(words)
             textLine.text = words
             val desiredWidth = layout.getLineWidth(lineIndex)
-            if (lineIndex == 0 && layout.lineCount > 1) {
+            if (lineIndex == 0 && layout.lineCount > 1 && !isTitle) {
                 //第一行
-                addCharsToLineFirst(textLine, words, contentPaint, desiredWidth)
+                addCharsToLineFirst(textLine, words, textPaint, desiredWidth)
             } else if (lineIndex == layout.lineCount - 1) {
                 //最后一行
-                addCharsToLineLast(textLine, words, stringBuilder, contentPaint, 0f)
+                val x = if (isTitle && ReadBookConfig.titleCenter)
+                    (visibleWidth - layout.getLineWidth(lineIndex)) / 2
+                else 0f
+                addCharsToLineLast(textLine, words, stringBuilder, textPaint, x)
             } else {
                 //中间行
-                addCharsToLineMiddle(textLine, words, contentPaint, desiredWidth, 0f)
+                addCharsToLineMiddle(textLine, words, textPaint, desiredWidth, 0f)
             }
         }
         durY += paragraphSpacing
@@ -346,7 +292,7 @@ object ChapterProvider {
         val bold = if (ReadBookConfig.textBold) Typeface.BOLD else Typeface.NORMAL
         contentPaint.typeface = Typeface.create(typeface, bold)
         //间距
-        lineSpacingExtra = ReadBookConfig.lineSpacingExtra.dp.toFloat()
+        lineSpacingExtra = ReadBookConfig.lineSpacingExtra.dp
         paragraphSpacing = ReadBookConfig.paragraphSpacing.dp
         titlePaint.textSize = (ReadBookConfig.textSize + 2).dp.toFloat()
         contentPaint.textSize = ReadBookConfig.textSize.dp.toFloat()
@@ -366,4 +312,8 @@ object ChapterProvider {
         visibleBottom = paddingTop + visibleHeight
     }
 
+    private val TextPaint.textHeight: Float
+        get() {
+            return this.fontMetrics.descent - fontMetrics.ascent + fontMetrics.leading
+        }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/CoverPageDelegate.kt b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/CoverPageDelegate.kt
index 2f4b2c404..c973fc87c 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/CoverPageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/CoverPageDelegate.kt
@@ -1,11 +1,12 @@
 package io.legado.app.ui.book.read.page.delegate
 
 import android.graphics.Canvas
+import android.graphics.Matrix
 import android.graphics.drawable.GradientDrawable
 import io.legado.app.ui.book.read.page.PageView
 
 class CoverPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
-
+    private val bitmapMatrix = Matrix()
     private val shadowDrawableR: GradientDrawable
 
     init {
@@ -16,13 +17,6 @@ class CoverPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
         shadowDrawableR.gradientType = GradientDrawable.LINEAR_GRADIENT
     }
 
-    override fun setStartPoint(x: Float, y: Float, invalidate: Boolean) {
-        curPage.x = 0.toFloat()
-        prevPage.x = -viewWidth.toFloat()
-        nextPage.x = 0.toFloat()
-        super.setStartPoint(x, y, invalidate)
-    }
-
     override fun onDraw(canvas: Canvas) {
         val offsetX = touchX - startX
 
@@ -33,10 +27,14 @@ class CoverPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
         val distanceX = if (offsetX > 0) offsetX - viewWidth else offsetX + viewWidth
         if (!isRunning) return
         if (mDirection == Direction.PREV) {
-            prevPage.translationX = offsetX - viewWidth
+            bitmapMatrix.setTranslate(distanceX, 0.toFloat())
+            curBitmap?.let { canvas.drawBitmap(it, 0f, 0f, null) }
+            prevBitmap?.let { canvas.drawBitmap(it, bitmapMatrix, null) }
             addShadow(distanceX.toInt(), canvas)
         } else if (mDirection == Direction.NEXT) {
-            curPage.translationX = offsetX
+            bitmapMatrix.setTranslate(distanceX - viewWidth, 0.toFloat())
+            nextBitmap?.let { canvas.drawBitmap(it, 0f, 0f, null) }
+            curBitmap?.let { canvas.drawBitmap(it, bitmapMatrix, null) }
             addShadow(distanceX.toInt(), canvas)
         }
     }
@@ -52,8 +50,6 @@ class CoverPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
     }
 
     override fun onAnimStop() {
-        curPage.x = 0.toFloat()
-        prevPage.x = -viewWidth.toFloat()
         if (!isCancel) {
             pageView.fillPage(mDirection)
         }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt
index a95d01e2a..74583bae0 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/HorizontalPageDelegate.kt
@@ -1,11 +1,40 @@
 package io.legado.app.ui.book.read.page.delegate
 
+import android.graphics.Bitmap
 import android.view.MotionEvent
 import io.legado.app.ui.book.read.page.PageView
+import io.legado.app.utils.screenshot
 import kotlin.math.abs
 
 abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageView) {
 
+    protected var curBitmap: Bitmap? = null
+    protected var prevBitmap: Bitmap? = null
+    protected var nextBitmap: Bitmap? = null
+
+    override fun setDirection(direction: Direction) {
+        super.setDirection(direction)
+        setBitmap()
+    }
+
+    private fun setBitmap() {
+        when (mDirection) {
+            Direction.PREV -> {
+                prevBitmap?.recycle()
+                prevBitmap = prevPage.screenshot()
+                curBitmap?.recycle()
+                curBitmap = curPage.screenshot()
+            }
+            Direction.NEXT -> {
+                nextBitmap?.recycle()
+                nextBitmap = nextPage.screenshot()
+                curBitmap?.recycle()
+                curBitmap = curPage.screenshot()
+            }
+            else -> Unit
+        }
+    }
+
     override fun onTouch(event: MotionEvent) {
         when (event.action) {
             MotionEvent.ACTION_DOWN -> {
@@ -69,4 +98,14 @@ abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageVie
         onAnimStart()
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        prevBitmap?.recycle()
+        prevBitmap = null
+        curBitmap?.recycle()
+        curBitmap = null
+        nextBitmap?.recycle()
+        nextBitmap = null
+    }
+
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt
index b337a17a1..616a41614 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SimulationPageDelegate.kt
@@ -3,8 +3,8 @@ package io.legado.app.ui.book.read.page.delegate
 import android.graphics.*
 import android.graphics.drawable.GradientDrawable
 import android.os.Build
+import io.legado.app.help.ReadBookConfig
 import io.legado.app.ui.book.read.page.PageView
-import io.legado.app.utils.screenshot
 import kotlin.math.*
 
 @Suppress("DEPRECATION")
@@ -73,10 +73,6 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
 
     private val mPaint: Paint = Paint().apply { style = Paint.Style.FILL }
 
-    private var curBitmap: Bitmap? = null
-    private var prevBitmap: Bitmap? = null
-    private var nextBitmap: Bitmap? = null
-
     init {
         //设置颜色数组
         val color = intArrayOf(0x333333, -0x4fcccccd)
@@ -118,31 +114,21 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
         mMaxLength = hypot(viewWidth.toDouble(), viewHeight.toDouble()).toFloat()
     }
 
-    override fun onDestroy() {
-        super.onDestroy()
-        prevBitmap?.recycle()
-        prevBitmap = null
-        curBitmap?.recycle()
-        curBitmap = null
-        nextBitmap?.recycle()
-        nextBitmap = null
-    }
-
     override fun setStartPoint(x: Float, y: Float, invalidate: Boolean) {
-        super.setStartPoint(x, y, invalidate)
+        super.setStartPoint(x, y, false)
         calcCornerXY(x, y)
     }
 
     override fun setTouchPoint(x: Float, y: Float, invalidate: Boolean) {
         super.setTouchPoint(x, y, false)
         //触摸y中间位置吧y变成屏幕高度
-        if ((startY > viewHeight / 3.0 && startY < viewHeight * 2 / 3.0)
+        if ((startY > viewHeight / 3 && startY < viewHeight * 2 / 3)
             || mDirection == Direction.PREV
         ) {
             touchY = viewHeight.toFloat()
         }
 
-        if (startY > viewHeight / 3.0 && startY < viewHeight / 2.0
+        if (startY > viewHeight / 3 && startY < viewHeight / 2
             && mDirection == Direction.NEXT
         ) {
             touchY = 1f
@@ -152,37 +138,22 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
 
     override fun setDirection(direction: Direction) {
         super.setDirection(direction)
-        setBitmap()
         when (direction) {
             Direction.PREV ->
                 //上一页滑动不出现对角
-                if (startX > viewWidth / 2.0) {
+                if (startX > viewWidth / 2) {
                     calcCornerXY(startX, viewHeight.toFloat())
                 } else {
                     calcCornerXY(viewWidth - startX, viewHeight.toFloat())
                 }
             Direction.NEXT ->
-                if (viewWidth / 2.0 > startX) {
+                if (viewWidth / 2 > startX) {
                     calcCornerXY(viewWidth - startX, startY)
                 }
             else -> Unit
         }
     }
 
-    private fun setBitmap() {
-        when (mDirection) {
-            Direction.PREV -> {
-                prevBitmap = prevPage.screenshot()
-                curBitmap = curPage.screenshot()
-            }
-            Direction.NEXT -> {
-                nextBitmap = nextPage.screenshot()
-                curBitmap = curPage.screenshot()
-            }
-            else -> Unit
-        }
-    }
-
     override fun onAnimStart() {
         var dx: Float
         val dy: Float
@@ -223,6 +194,7 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
     }
 
     override fun onDraw(canvas: Canvas) {
+        if (!isRunning) return
         when (mDirection) {
             Direction.NEXT -> {
                 calcPoints()
@@ -297,6 +269,7 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
         mMatrix.setValues(mMatrixArray)
         mMatrix.preTranslate(-mBezierControl1.x, -mBezierControl1.y)
         mMatrix.postTranslate(mBezierControl1.x, mBezierControl1.y)
+        canvas.drawColor(ReadBookConfig.bgMeanColor)
         canvas.drawBitmap(bitmap, mMatrix, mPaint)
         mPaint.colorFilter = null
         canvas.rotate(mDegrees, mBezierStart1.x, mBezierStart1.y)
@@ -485,8 +458,8 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
      * 计算拖拽点对应的拖拽脚
      */
     private fun calcCornerXY(x: Float, y: Float) {
-        mCornerX = if (x <= viewWidth / 2.0) 0 else viewWidth
-        mCornerY = if (y <= viewHeight / 2.0) 0 else viewHeight
+        mCornerX = if (x <= viewWidth / 2) 0 else viewWidth
+        mCornerY = if (y <= viewHeight / 2) 0 else viewHeight
         mIsRtOrLb = (mCornerX == 0 && mCornerY == viewHeight)
                 || (mCornerY == 0 && mCornerX == viewWidth)
     }
@@ -497,21 +470,23 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
 
         mMiddleX = (mTouchX + mCornerX) / 2
         mMiddleY = (mTouchY + mCornerY) / 2
-
         mBezierControl1.x =
             mMiddleX - (mCornerY - mMiddleY) * (mCornerY - mMiddleY) / (mCornerX - mMiddleX)
         mBezierControl1.y = mCornerY.toFloat()
-
         mBezierControl2.x = mCornerX.toFloat()
-        mBezierControl2.y = if ((mCornerY - mMiddleY).toInt() == 0) {
-            mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+
+        val f4 = mCornerY - mMiddleY
+        if (f4 == 0f) {
+            mBezierControl2.y = mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+
         } else {
-            mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
+            mBezierControl2.y =
+                mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
         }
-
         mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2
         mBezierStart1.y = mCornerY.toFloat()
-        //固定左边上下两个点
+
+        // 固定左边上下两个点
         if (mTouchX > 0 && mTouchX < viewWidth) {
             if (mBezierStart1.x < 0 || mBezierStart1.x > viewWidth) {
                 if (mBezierStart1.x < 0)
@@ -520,6 +495,7 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
                 val f1 = abs(mCornerX - mTouchX)
                 val f2 = viewWidth * f1 / mBezierStart1.x
                 mTouchX = abs(mCornerX - f2)
+
                 val f3 = abs(mCornerX - mTouchX) * abs(mCornerY - mTouchY) / f1
                 mTouchY = abs(mCornerY - f3)
 
@@ -531,10 +507,14 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
                 mBezierControl1.y = mCornerY.toFloat()
 
                 mBezierControl2.x = mCornerX.toFloat()
-                mBezierControl2.y = if ((mCornerY - mMiddleY).toInt() == 0) {
-                    mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
+
+                val f5 = mCornerY - mMiddleY
+                if (f5 == 0f) {
+                    mBezierControl2.y =
+                        mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / 0.1f
                 } else {
-                    mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
+                    mBezierControl2.y =
+                        mMiddleY - (mCornerX - mMiddleX) * (mCornerX - mMiddleX) / (mCornerY - mMiddleY)
                 }
 
                 mBezierStart1.x = mBezierControl1.x - (mCornerX - mBezierControl1.x) / 2
@@ -543,12 +523,19 @@ class SimulationPageDelegate(pageView: PageView) : HorizontalPageDelegate(pageVi
         mBezierStart2.x = mCornerX.toFloat()
         mBezierStart2.y = mBezierControl2.y - (mCornerY - mBezierControl2.y) / 2
 
-        mTouchToCornerDis = hypot(mTouchX - mCornerX, touchY - mCornerY)
+        mTouchToCornerDis = hypot(
+            (mTouchX - mCornerX).toDouble(),
+            (mTouchY - mCornerY).toDouble()
+        ).toFloat()
 
-        mBezierEnd1 =
-            getCross(PointF(mTouchX, mTouchY), mBezierControl1, mBezierStart1, mBezierStart2)
-        mBezierEnd2 =
-            getCross(PointF(mTouchX, mTouchY), mBezierControl2, mBezierStart1, mBezierStart2)
+        mBezierEnd1 = getCross(
+            PointF(mTouchX, mTouchY), mBezierControl1, mBezierStart1,
+            mBezierStart2
+        )
+        mBezierEnd2 = getCross(
+            PointF(mTouchX, mTouchY), mBezierControl2, mBezierStart1,
+            mBezierStart2
+        )
 
         mBezierVertex1.x = (mBezierStart1.x + 2 * mBezierControl1.x + mBezierEnd1.x) / 4
         mBezierVertex1.y = (2 * mBezierControl1.y + mBezierStart1.y + mBezierEnd1.y) / 4
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SlidePageDelegate.kt b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SlidePageDelegate.kt
index 850c6b4ea..197b65c39 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SlidePageDelegate.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/delegate/SlidePageDelegate.kt
@@ -1,16 +1,12 @@
 package io.legado.app.ui.book.read.page.delegate
 
 import android.graphics.Canvas
+import android.graphics.Matrix
 import io.legado.app.ui.book.read.page.PageView
 
 class SlidePageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
 
-    override fun setStartPoint(x: Float, y: Float, invalidate: Boolean) {
-        curPage.x = 0f
-        prevPage.x = -viewWidth.toFloat()
-        nextPage.x = viewWidth.toFloat()
-        super.setStartPoint(x, y, invalidate)
-    }
+    private val bitmapMatrix = Matrix()
 
     override fun onAnimStart() {
         val distanceX: Float
@@ -41,21 +37,22 @@ class SlidePageDelegate(pageView: PageView) : HorizontalPageDelegate(pageView) {
         if ((mDirection == Direction.NEXT && offsetX > 0)
             || (mDirection == Direction.PREV && offsetX < 0)
         ) return
-
+        val distanceX = if (offsetX > 0) offsetX - viewWidth else offsetX + viewWidth
         if (!isRunning) return
         if (mDirection == Direction.PREV) {
-            curPage.translationX = offsetX
-            prevPage.translationX = offsetX - viewWidth
+            bitmapMatrix.setTranslate(distanceX + viewWidth, 0.toFloat())
+            curBitmap?.let { canvas.drawBitmap(it, bitmapMatrix, null) }
+            bitmapMatrix.setTranslate(distanceX, 0.toFloat())
+            prevBitmap?.let { canvas.drawBitmap(it, bitmapMatrix, null) }
         } else if (mDirection == Direction.NEXT) {
-            curPage.translationX = offsetX
-            nextPage.translationX = offsetX + viewWidth
+            bitmapMatrix.setTranslate(distanceX, 0.toFloat())
+            nextBitmap?.let { canvas.drawBitmap(it, bitmapMatrix, null) }
+            bitmapMatrix.setTranslate(distanceX - viewWidth, 0.toFloat())
+            curBitmap?.let { canvas.drawBitmap(it, bitmapMatrix, null) }
         }
     }
 
     override fun onAnimStop() {
-        curPage.x = 0f
-        prevPage.x = -viewWidth.toFloat()
-        nextPage.x = viewWidth.toFloat()
         if (!isCancel) {
             pageView.fillPage(mDirection)
         }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt b/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt
index 4e6089ddd..e8782b6c3 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt
@@ -14,7 +14,7 @@ data class TextPage(
     var pageSize: Int = 0,
     var chapterSize: Int = 0,
     var chapterIndex: Int = 0,
-    var height: Int = 0
+    var height: Float = 0f
 ) {
 
     @Suppress("DEPRECATION")
@@ -46,7 +46,7 @@ data class TextPage(
                 }
                 textLines.add(textLine)
             }
-            height = ChapterProvider.visibleHeight
+            height = ChapterProvider.visibleHeight.toFloat()
         }
         return this
     }
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 8b4705ae0..298ccb294 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
@@ -16,6 +16,7 @@ import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.AppConfig
 import io.legado.app.help.storage.Backup
+import io.legado.app.help.storage.SyncBookProgress
 import io.legado.app.lib.theme.ATH
 import io.legado.app.service.BaseReadAloudService
 import io.legado.app.service.help.ReadAloud
@@ -128,6 +129,7 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
 
     override fun finish() {
         if (!BuildConfig.DEBUG) {
+            SyncBookProgress.uploadBookProgress()
             Backup.autoBack(this)
         }
         super.finish()
diff --git a/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt b/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
index 7e535f009..5c84aa679 100644
--- a/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt
@@ -8,6 +8,7 @@ import io.legado.app.R
 import io.legado.app.base.BaseActivity
 import io.legado.app.help.AppConfig
 import io.legado.app.help.coroutine.Coroutine
+import io.legado.app.help.storage.SyncBookProgress
 import io.legado.app.lib.theme.accentColor
 import io.legado.app.ui.book.read.ReadBookActivity
 import io.legado.app.ui.main.MainActivity
@@ -41,6 +42,7 @@ open class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
                 else -> null
             }
         }
+        SyncBookProgress.downloadBookProgress()
         root_view.postDelayed({ startMainActivity() }, 300)
     }
 
diff --git a/app/src/main/java/io/legado/app/utils/BitmapUtils.kt b/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
index 371be8122..138a0c063 100644
--- a/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
+++ b/app/src/main/java/io/legado/app/utils/BitmapUtils.kt
@@ -5,6 +5,7 @@ import android.graphics.Bitmap
 import android.graphics.Bitmap.Config
 import android.graphics.BitmapFactory
 import android.graphics.Canvas
+import android.graphics.Color
 import android.renderscript.Allocation
 import android.renderscript.Element
 import android.renderscript.RenderScript
@@ -12,10 +13,7 @@ import android.renderscript.ScriptIntrinsicBlur
 import android.view.View
 import io.legado.app.App
 import java.io.IOException
-import kotlin.math.ceil
-import kotlin.math.floor
-import kotlin.math.min
-import kotlin.math.sqrt
+import kotlin.math.*
 
 
 @Suppress("unused", "WeakerAccess")
@@ -257,4 +255,31 @@ object BitmapUtils {
         return blurredBitmap
     }
 
+    fun getMeanColor(bitmap: Bitmap): Int {
+        val width: Int = bitmap.width
+        val height: Int = bitmap.height
+        var pixel: Int
+        var pixelSumRed = 0
+        var pixelSumBlue = 0
+        var pixelSumGreen = 0
+        for (i in 0..99) {
+            for (j in 70..99) {
+                pixel = bitmap.getPixel(
+                    (i * width / 100.toFloat()).roundToInt(),
+                    (j * height / 100.toFloat()).roundToInt()
+                )
+                pixelSumRed += Color.red(pixel)
+                pixelSumGreen += Color.green(pixel)
+                pixelSumBlue += Color.blue(pixel)
+            }
+        }
+        val averagePixelRed = pixelSumRed / 3000
+        val averagePixelBlue = pixelSumBlue / 3000
+        val averagePixelGreen = pixelSumGreen / 3000
+        return Color.rgb(
+            averagePixelRed + 3,
+            averagePixelGreen + 3, averagePixelBlue + 3
+        )
+    }
+
 }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 3c92dae8f..68f3af591 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -614,7 +614,7 @@
     <string name="selectText">长按选择文本</string>
     <string name="header">页眉</string>
     <string name="main_body">正文</string>
-    <string name="footer">页角</string>
+    <string name="footer">页脚</string>
     <string name="select_end">文本选择结束位置</string>
     <string name="select_start">文本选择开始位置</string>
     <string name="share_layout">共用布局</string>
diff --git a/app/src/main/res/xml/pref_config_backup.xml b/app/src/main/res/xml/pref_config_backup.xml
index 3f99cfef2..b2442aa09 100644
--- a/app/src/main/res/xml/pref_config_backup.xml
+++ b/app/src/main/res/xml/pref_config_backup.xml
@@ -24,6 +24,13 @@
             android:summary="@string/web_dav_pw_s"
             app:iconSpaceReserved="false" />
 
+        <io.legado.app.ui.widget.prefs.SwitchPreference
+            android:key="webDavCreateDir"
+            android:defaultValue="true"
+            android:title="创建子文件夹"
+            android:summary="创建legado文件夹作为备份文件夹"
+            app:iconSpaceReserved="false" />
+
     </io.legado.app.ui.widget.prefs.PreferenceCategory>
 
     <io.legado.app.ui.widget.prefs.PreferenceCategory app:iconSpaceReserved="false">