diff --git a/app/build.gradle b/app/build.gradle
index e606cb85c..f5baacd8e 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -172,8 +172,10 @@ dependencies {
     implementation 'com.github.gedoor:rhino-android:1.4'
 
     //网络
+    implementation 'com.ljx.rxhttp:rxhttp:2.4.4'
     implementation 'com.squareup.retrofit2:retrofit:2.9.0'
     implementation 'com.github.franmontiel:PersistentCookieJar:v1.0.1'
+    kapt 'com.ljx.rxhttp:rxhttp-compiler:2.4.4'
 
     //Glide
     implementation 'com.github.bumptech.glide:glide:4.11.0'
diff --git a/app/src/main/assets/updateLog.md b/app/src/main/assets/updateLog.md
index 4a97f0242..bfbb28280 100644
--- a/app/src/main/assets/updateLog.md
+++ b/app/src/main/assets/updateLog.md
@@ -3,6 +3,9 @@
 * 关注合作公众号 **[小说拾遗]** 获取好看的小说。
 * 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】。
 
+**2020/12/11**
+* 修复因修改进度同步导致的bug
+
 **2020/12/09**
 * 修复bug
 * 优化中文排序
diff --git a/app/src/main/java/io/legado/app/App.kt b/app/src/main/java/io/legado/app/App.kt
index e43ce9ac7..7fdab716d 100644
--- a/app/src/main/java/io/legado/app/App.kt
+++ b/app/src/main/java/io/legado/app/App.kt
@@ -15,9 +15,11 @@ import io.legado.app.constant.AppConst.channelIdWeb
 import io.legado.app.constant.EventBus
 import io.legado.app.data.AppDatabase
 import io.legado.app.help.*
+import io.legado.app.help.http.HttpHelper
 import io.legado.app.utils.LanguageUtils
 import io.legado.app.utils.postEvent
 import org.jetbrains.anko.defaultSharedPreferences
+import rxhttp.wrapper.param.RxHttp
 
 @Suppress("DEPRECATION")
 class App : MultiDexApplication() {
@@ -44,14 +46,14 @@ class App : MultiDexApplication() {
         CrashHandler(this)
         LanguageUtils.setConfiguration(this)
         db = AppDatabase.createDatabase(INSTANCE)
+        RxHttp.init(HttpHelper.client, BuildConfig.DEBUG)
         packageManager.getPackageInfo(packageName, 0)?.let {
             versionCode = it.versionCode
             versionName = it.versionName
         }
         createNotificationChannels()
         applyDayNight()
-        LiveEventBus
-            .config()
+        LiveEventBus.config()
             .supportBroadcast(this)
             .lifecycleObserverAlwaysActive(true)
             .autoClear(false)
diff --git a/app/src/main/java/io/legado/app/help/http/HttpHelper.kt b/app/src/main/java/io/legado/app/help/http/HttpHelper.kt
index c6568f50e..0498c6251 100644
--- a/app/src/main/java/io/legado/app/help/http/HttpHelper.kt
+++ b/app/src/main/java/io/legado/app/help/http/HttpHelper.kt
@@ -7,6 +7,8 @@ import io.legado.app.utils.NetworkUtils
 import kotlinx.coroutines.suspendCancellableCoroutine
 import okhttp3.*
 import retrofit2.Retrofit
+import rxhttp.toStr
+import rxhttp.wrapper.param.RxHttp
 import java.net.InetSocketAddress
 import java.net.Proxy
 import java.util.concurrent.TimeUnit
@@ -39,23 +41,11 @@ object HttpHelper {
         builder.build()
     }
 
-    fun simpleGet(url: String, encode: String? = null): String? {
-        NetworkUtils.getBaseUrl(url)?.let { baseUrl ->
-            val response = getApiService<HttpGetApi>(baseUrl, encode)
-                .get(url, mapOf(Pair(AppConst.UA_NAME, AppConfig.userAgent)))
-                .execute()
-            return response.body()
-        }
-        return null
-    }
-
-    suspend fun simpleGetAsync(url: String, encode: String? = null): String? {
-        NetworkUtils.getBaseUrl(url)?.let { baseUrl ->
-            val response = getApiService<HttpGetApi>(baseUrl, encode)
-                .getAsync(url, mapOf(Pair(AppConst.UA_NAME, AppConfig.userAgent)))
-            return response.body()
-        }
-        return null
+    suspend fun simpleGetAsync(url: String): String {
+        val str = RxHttp.get(url)
+            .addHeader(AppConst.UA_NAME, AppConfig.userAgent)
+            .toStr()
+        return str.await()
     }
 
     suspend fun simpleGetBytesAsync(url: String): ByteArray? {
diff --git a/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt b/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt
index 9d0843864..f52bd9459 100644
--- a/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt
+++ b/app/src/main/java/io/legado/app/help/storage/BookWebDav.kt
@@ -26,7 +26,7 @@ object BookWebDav {
     private val bookProgressUrl = "${rootWebDavUrl}bookProgress/"
     private val zipFilePath = "${FileUtils.getCachePath()}${File.separator}backup.zip"
 
-    val rootWebDavUrl: String
+    private val rootWebDavUrl: String
         get() {
             var url = App.INSTANCE.getPrefString(PreferKey.webDavUrl)
             if (url.isNullOrEmpty()) {
@@ -155,7 +155,7 @@ object BookWebDav {
                 durChapterTitle = book.durChapterTitle
             )
             val json = GSON.toJson(bookProgress)
-            val url = getUrl(book)
+            val url = geProtresstUrl(book)
             if (initWebDav()) {
                 WebDav(url).upload(json.toByteArray())
             }
@@ -164,7 +164,7 @@ object BookWebDav {
 
     fun getBookProgress(book: Book): BookProgress? {
         if (initWebDav()) {
-            val url = getUrl(book)
+            val url = geProtresstUrl(book)
             WebDav(url).download()?.let { byteArray ->
                 val json = String(byteArray)
                 GSON.fromJsonObject<BookProgress>(json)?.let {
@@ -175,7 +175,7 @@ object BookWebDav {
         return null
     }
 
-    private fun getUrl(book: Book): String {
+    private fun geProtresstUrl(book: Book): String {
         return bookProgressUrl + book.name + "_" + book.author + ".json"
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/association/ImportBookSourceViewModel.kt b/app/src/main/java/io/legado/app/ui/association/ImportBookSourceViewModel.kt
index 664513bc0..2b57d7c06 100644
--- a/app/src/main/java/io/legado/app/ui/association/ImportBookSourceViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/association/ImportBookSourceViewModel.kt
@@ -118,11 +118,8 @@ class ImportBookSourceViewModel(app: Application) : BaseViewModel(app) {
         }
     }
 
-    private fun importSourceUrl(url: String) {
-        HttpHelper.simpleGet(url, "UTF-8").let { body ->
-            if (body == null) {
-                throw Exception(context.getString(R.string.error_get_data))
-            }
+    private suspend fun importSourceUrl(url: String) {
+        HttpHelper.simpleGetAsync(url).let { body ->
             val items: List<Map<String, Any>> = Restore.jsonPath.parse(body).read("$")
             for (item in items) {
                 val jsonItem = Restore.jsonPath.parse(item)
diff --git a/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt b/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt
index bbd2cea78..28f90e553 100644
--- a/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/association/ImportReplaceRuleViewModel.kt
@@ -48,7 +48,7 @@ class ImportReplaceRuleViewModel(app: Application) : BaseViewModel(app) {
     fun import(text: String) {
         execute {
             if (text.isAbsUrl()) {
-                HttpHelper.simpleGet(text)?.let {
+                HttpHelper.simpleGetAsync(text).let {
                     val rules = OldReplace.jsonToReplaceRules(it)
                     allRules.addAll(rules)
                 }
diff --git a/app/src/main/java/io/legado/app/ui/association/ImportRssSourceViewModel.kt b/app/src/main/java/io/legado/app/ui/association/ImportRssSourceViewModel.kt
index 751390a93..8de7a33af 100644
--- a/app/src/main/java/io/legado/app/ui/association/ImportRssSourceViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/association/ImportRssSourceViewModel.kt
@@ -113,8 +113,8 @@ class ImportRssSourceViewModel(app: Application) : BaseViewModel(app) {
         }
     }
 
-    private fun importSourceUrl(url: String) {
-        HttpHelper.simpleGet(url, "UTF-8")?.let { body ->
+    private suspend fun importSourceUrl(url: String) {
+        HttpHelper.simpleGetAsync(url).let { body ->
             val items: List<Map<String, Any>> = Restore.jsonPath.parse(body).read("$")
             for (item in items) {
                 val jsonItem = Restore.jsonPath.parse(item)
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
index 478175e3b..76137cfa7 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
@@ -47,7 +47,6 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
     private fun initBook(book: Book) {
         if (ReadBook.book?.bookUrl != book.bookUrl) {
-            downloadProgress(book)
             ReadBook.resetData(book)
             isInitFinish = true
             if (!book.isLocalBook() && ReadBook.webBook == null) {
@@ -67,6 +66,7 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
                 }
                 ReadBook.loadContent(resetPageOffset = true)
             }
+            syncBookProgress(book)
         } else {
             ReadBook.book = book
             if (ReadBook.durChapterIndex != book.durChapterIndex) {
@@ -100,15 +100,6 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         }
     }
 
-    private fun downloadProgress(book: Book) {
-        BookWebDav.getBookProgress(book)?.let {
-            book.durChapterIndex = it.durChapterIndex
-            book.durChapterPos = it.durChapterPos
-            book.durChapterTime = it.durChapterTime
-            book.durChapterTitle = it.durChapterTitle
-        }
-    }
-
     private fun loadBookInfo(
         book: Book,
         changeDruChapterIndex: ((chapters: List<BookChapter>) -> Unit)? = null,
@@ -168,12 +159,14 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
     fun syncBookProgress(book: Book) {
         execute {
-            downloadProgress(book)
-            ReadBook.durChapterIndex = book.durChapterIndex
-            ReadBook.durChapterPos = book.durChapterPos
-            ReadBook.prevTextChapter = null
-            ReadBook.clearTextChapter()
-            ReadBook.loadContent(resetPageOffset = true)
+            BookWebDav.getBookProgress(book)?.let {
+                book.durChapterIndex = it.durChapterIndex
+                book.durChapterPos = it.durChapterPos
+                book.durChapterTime = it.durChapterTime
+                book.durChapterTitle = it.durChapterTitle
+                ReadBook.clearTextChapter()
+                ReadBook.loadContent(resetPageOffset = true)
+            }
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineViewModel.kt b/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineViewModel.kt
index c9680e4d4..e79ad4730 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/SpeakEngineViewModel.kt
@@ -21,7 +21,7 @@ class SpeakEngineViewModel(application: Application) : BaseViewModel(application
 
     fun importOnLine(url: String, finally: (msg: String) -> Unit) {
         execute {
-            HttpHelper.simpleGetAsync(url)?.let { json ->
+            HttpHelper.simpleGetAsync(url).let { json ->
                 GSON.fromJsonArray<HttpTTS>(json)?.let {
                     App.db.httpTTSDao.insert(*it.toTypedArray())
                 }
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/TocRegexViewModel.kt b/app/src/main/java/io/legado/app/ui/book/read/config/TocRegexViewModel.kt
index cf4793727..ae9ad00cb 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/TocRegexViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/TocRegexViewModel.kt
@@ -28,7 +28,7 @@ class TocRegexViewModel(application: Application) : BaseViewModel(application) {
 
     fun importOnLine(url: String, finally: (msg: String) -> Unit) {
         execute {
-            HttpHelper.simpleGetAsync(url)?.let { json ->
+            HttpHelper.simpleGetAsync(url).let { json ->
                 GSON.fromJsonArray<TxtTocRule>(json)?.let {
                     App.db.txtTocRule.insert(*it.toTypedArray())
                 }