优化

app/src/main/java/io/legado/app/ui/book/read/page/provider/TextChapterLayout.kt

@@ -13,6 +13,7 @@ import io.legado.app.help.book.BookHelp
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.ReadBookConfig
 import io.legado.app.help.coroutine.Coroutine
+import io.legado.app.help.globalExecutor
 import io.legado.app.model.ImageProvider
 import io.legado.app.model.ReadBook
 import io.legado.app.ui.book.read.page.entities.TextChapter
@@ -68,7 +69,7 @@ class TextChapterLayout(
     private val stringBuilder = StringBuilder()
 
     private var isCompleted = false
-    private val job: Coroutine<*>
+    private var job: Coroutine<*>? = null
     private val bookChapter inline get() = textChapter.chapter
     private val displayTitle inline get() = textChapter.title
     private val chaptersSize inline get() = textChapter.chaptersSize
@@ -76,6 +77,7 @@ class TextChapterLayout(
     var exception: Throwable? = null
 
     init {
+        globalExecutor.submit {
             job = Coroutine.async(scope) {
                 launch {
                     val bookSource = book.getBookSource() ?: return@launch
@@ -89,6 +91,7 @@ class TextChapterLayout(
                 isCompleted = true
             }
         }
+    }
 
     fun setProgressListener(l: LayoutProgressListener?) {
         try {
@@ -106,7 +109,7 @@ class TextChapterLayout(
     }
 
     fun cancel() {
-        job.cancel()
+        job?.cancel()
     }
 
     private fun onPageCompleted() {