up

app/src/main/java/io/legado/app/ui/readbook/ReadBookActivity.kt

@@ -49,6 +49,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
         initView()
         viewModel.callBack = this
         viewModel.chapterMaxIndex.observe(this, Observer { bookLoadFinish() })
+        viewModel.bookData.observe(this, Observer { title_bar.title = it.name })
         viewModel.initData(intent)
         savedInstanceState?.let {
             changeSourceDialog = supportFragmentManager.findFragmentByTag(ChangeSourceDialog.tag) as? ChangeSourceDialog
@@ -145,7 +146,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
             }
 
             override fun openChapterList() {
-                viewModel.book?.let {
+                viewModel.bookData.value?.let {
                     startActivity<ChapterListActivity>(Pair("bookUrl", it.bookUrl))
                 }
             }
@@ -182,7 +183,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
         when (item.itemId) {
             R.id.menu_change_source -> {
                 if (changeSourceDialog == null) {
-                    viewModel.book?.let {
+                    viewModel.bookData.value?.let {
                         changeSourceDialog = ChangeSourceDialog.newInstance(it.name, it.author)
                         changeSourceDialog?.callBack = this
                     }
@@ -229,7 +230,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
     }
 
     private fun bookLoadFinish() {
-        viewModel.book?.let {
+        viewModel.bookData.value?.let {
             viewModel.loadContent(it, it.durChapterIndex)
         }
     }
@@ -252,7 +253,7 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
         }
         when (readAloudStatus) {
             Status.STOP -> {
-                viewModel.book?.let {
+                viewModel.bookData.value?.let {
                     ReadAloudService.paly(this, it.name, "", "")
                 }
             }

app/src/main/java/io/legado/app/ui/readbook/ReadBookViewModel.kt

@@ -3,6 +3,7 @@ package io.legado.app.ui.readbook
 import android.app.Application
 import android.content.Intent
 import androidx.lifecycle.MediatorLiveData
+import androidx.lifecycle.MutableLiveData
 import io.legado.app.App
 import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.Book
@@ -14,7 +15,7 @@ import kotlinx.coroutines.Dispatchers.IO
 
 class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
-    var book: Book? = null
+    var bookData = MutableLiveData<Book>()
     var bookSource: BookSource? = null
     var chapterMaxIndex = MediatorLiveData<Int>()
     var webBook: WebBook? = null
@@ -24,8 +25,10 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
         val bookUrl = intent.getStringExtra("bookUrl")
         if (!bookUrl.isNullOrEmpty()) {
             execute {
-                book = App.db.bookDao().getBook(bookUrl)
+                App.db.bookDao().getBook(bookUrl).let {
-                book?.let { book ->
+                    bookData.postValue(it)
+                }
+                bookData.value?.let { book ->
                     bookSource = App.db.bookSourceDao().getBookSource(book.origin)
                     bookSource?.let {
                         webBook = WebBook(it)
@@ -34,11 +37,17 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
                     if (count == 0) {
                         webBook?.getChapterList(book)
                             ?.onSuccess(IO) { cList ->
-                                cList?.let {
+                                if (!cList.isNullOrEmpty()) {
                                     App.db.bookChapterDao().insert(*cList.toTypedArray())
                                     chapterMaxIndex.postValue(cList.size)
+                                } else {
+
                                 }
-                            }
+                            }?.onError {
+
+                            } ?: let {
+
+                        }
                     } else {
                         chapterMaxIndex.postValue(count)
                     }