优化

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

@@ -133,26 +133,21 @@ object ImageProvider {
         if (cacheBitmap != null) return cacheBitmap
         if (height != null && AppConfig.asyncLoadImage && ReadBook.pageAnim() == PageAnim.scrollPageAnim) {
             Coroutine.async {
-                kotlin.runCatching {
                 val bitmap = BitmapUtils.decodeBitmap(vFile.absolutePath, width, height)
                     ?: throw NoStackTraceException(appCtx.getString(R.string.error_decode_bitmap))
                 withContext(Main) {
                     bitmapLruCache.put(vFile.absolutePath, bitmap)
                 }
-                }.onFailure {
+            }.onError {
                 //错误图片占位,防止重复获取
-                    withContext(Main) {
                 bitmapLruCache.put(vFile.absolutePath, errorBitmap)
-                    }
                 putDebug(
                     "ImageProvider: decode bitmap failed. path: ${vFile.absolutePath}\n$it",
                     it
                 )
-                }
-                withContext(Main) {
+            }.onFinally {
                 block?.invoke()
             }
-            }
             return null
         }
         @Suppress("BlockingMethodInNonBlockingContext")