优化

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

@@ -69,6 +69,7 @@ class PageView(context: Context) : FrameLayout(context) {
     }
 
     private fun upBitmap() {
+        post {
             Coroutine.async {
                 screenshot()
             }.onSuccess {
@@ -79,6 +80,7 @@ class PageView(context: Context) : FrameLayout(context) {
                 AppLog.put("更新PageView图片出错", it)
             }
         }
+    }
 
     fun upStyle() = binding.run {
         upTipStyle()