up

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

@@ -237,16 +237,23 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_rea
 
     override fun loadContentFinish(bookChapter: BookChapter, content: String) {
         launch {
-            if (viewModel.durChapterIndex == bookChapter.index) {
-                tv_chapter_name.text = bookChapter.title
-                tv_chapter_name.visible()
-                if (!viewModel.isLocalBook) {
-                    tv_chapter_url.text = bookChapter.url
-                    tv_chapter_url.visible()
+            when (bookChapter.index) {
+                viewModel.durChapterIndex -> {
+                    tv_chapter_name.text = bookChapter.title
+                    tv_chapter_name.visible()
+                    if (!viewModel.isLocalBook) {
+                        tv_chapter_url.text = bookChapter.url
+                        tv_chapter_url.visible()
+                    }
+                    viewModel.curTextChapter = ChapterProvider.getTextChapter(content_text_view, bookChapter, content)
+                }
+                viewModel.durChapterIndex - 1 -> {
+                    viewModel.prevTextChapter = ChapterProvider.getTextChapter(content_text_view, bookChapter, content)
+                }
+                viewModel.durChapterIndex + 1 -> {
+                    viewModel.nextTextChapter = ChapterProvider.getTextChapter(content_text_view, bookChapter, content)
                 }
             }
-            val textChapter = ChapterProvider.getTextChapter(content_text_view, bookChapter, content)
-            content_text_view.text = textChapter.pages[0].stringBuilder
         }
     }
 

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

@@ -13,6 +13,7 @@ import io.legado.app.data.entities.BookChapter
 import io.legado.app.data.entities.BookSource
 import io.legado.app.help.BookHelp
 import io.legado.app.model.WebBook
+import io.legado.app.ui.widget.page.TextChapter
 import kotlinx.coroutines.Dispatchers.IO
 
 class ReadBookViewModel(application: Application) : BaseViewModel(application) {
@@ -24,6 +25,9 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
     var callBack: CallBack? = null
     var durChapterIndex = 0
     var isLocalBook = true
+    var prevTextChapter: TextChapter? = null
+    var curTextChapter: TextChapter? = null
+    var nextTextChapter: TextChapter? = null
 
     fun initData(intent: Intent) {
         val bookUrl = intent.getStringExtra("bookUrl")

app/src/main/java/io/legado/app/ui/widget/page/ChapterProvider.kt

@@ -29,7 +29,7 @@ object ChapterProvider {
             surplusText = surplusText.substring(textView.getCharNum())
             pageIndex++
         }
-        return TextChapter(bookChapter.index, textPages)
+        return TextChapter(bookChapter.index, bookChapter.title, textPages)
     }
 
 

app/src/main/java/io/legado/app/ui/widget/page/TextChapter.kt

@@ -1,3 +1,3 @@
 package io.legado.app.ui.widget.page
 
-data class TextChapter(val position: Int, val pages: List<TextPage>)
+data class TextChapter(val position: Int, val title: String, val pages: List<TextPage>)