优化代码

app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt

@@ -108,9 +108,6 @@ class ReadBookActivity : ReadBookBaseActivity(),
             upMenu()
             upView()
         }
-        viewModel.processLiveData.observe(this) {
-            sureSyncProgress(it)
-        }
         viewModel.initData(intent)
     }
 
@@ -232,7 +229,9 @@ class ReadBookActivity : ReadBookBaseActivity(),
             }
             R.id.menu_set_charset -> showCharsetConfig()
             R.id.menu_get_progress -> ReadBook.book?.let {
-                viewModel.syncBookProgress(it)
+                viewModel.syncBookProgress(it) { progress ->
+                    sureSyncProgress(progress)
+                }
             }
             R.id.menu_help -> showReadMenuHelp()
         }

app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt

@@ -2,7 +2,6 @@ package io.legado.app.ui.book.read
 
 import android.app.Application
 import android.content.Intent
-import androidx.lifecycle.MutableLiveData
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseViewModel
@@ -26,7 +25,6 @@ import kotlinx.coroutines.withContext
 class ReadBookViewModel(application: Application) : BaseViewModel(application) {
     var isInitFinish = false
     var searchContentQuery = ""
-    val processLiveData = MutableLiveData<BookProgress>()
 
     fun initData(intent: Intent) {
         execute {
@@ -162,14 +160,20 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         }
     }
 
-    fun syncBookProgress(book: Book, syncBookProgress: Boolean = AppConfig.syncBookProgress) {
+    fun syncBookProgress(
+        book: Book,
+        syncBookProgress: Boolean = AppConfig.syncBookProgress,
+        alertSync: ((progress: BookProgress) -> Unit)? = null
+    ) {
         if (syncBookProgress)
             execute {
-                BookWebDav.getBookProgress(book)?.let { progress ->
+                BookWebDav.getBookProgress(book)
+            }.onSuccess {
+                it?.let { progress ->
                     if (progress.durChapterIndex < book.durChapterIndex ||
                         (progress.durChapterIndex == book.durChapterIndex && progress.durChapterPos < book.durChapterPos)
                     ) {
-                        processLiveData.postValue(progress)
+                        alertSync?.invoke(progress)
                     } else {
                         ReadBook.setProgress(progress)
                     }