优化

app/src/main/java/io/legado/app/model/ReadBook.kt

@@ -209,6 +209,9 @@ object ReadBook : CoroutineScope by MainScope() {
         }
     }
 
+    /**
+     * 当前页数
+     */
     fun durPageIndex(): Int {
         curTextChapter?.let {
             return it.getPageIndexByCharIndex(durChapterPos)

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

@@ -140,8 +140,10 @@ class ReadAloudDialog : BaseDialogFragment() {
     private fun upPlayState() {
         if (!BaseReadAloudService.pause) {
             binding.ivPlayPause.setImageResource(R.drawable.ic_pause_24dp)
+            binding.ivPlayPause.contentDescription = getString(R.string.pause)
         } else {
             binding.ivPlayPause.setImageResource(R.drawable.ic_play_24dp)
+            binding.ivPlayPause.contentDescription = getString(R.string.audio_play)
         }
         val bg = requireContext().bottomBackground
         val isLight = ColorUtils.isColorLight(bg)

app/src/main/java/io/legado/app/ui/book/read/page/entities/TextChapter.kt

@@ -61,6 +61,9 @@ data class TextChapter(
         return stringBuilder.toString()
     }
 
+    /**
+     * 根据索引位置获取所在页
+     */
     fun getPageIndexByCharIndex(charIndex: Int): Int {
         var length = 0
         pages.forEach {