优化

app/src/main/java/io/legado/app/api/controller/BookController.kt

@@ -89,7 +89,7 @@ object BookController {
         this.bookUrl = bookUrl
         val bitmap = runBlocking {
             ImageProvider.cacheImage(book, src, bookSource)
-            ImageProvider.getImage(book, src, width, width)
+            ImageProvider.getImage(book, src, width)
         }
         return returnData.setData(bitmap)
     }

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

@@ -80,4 +80,25 @@ object ImageProvider {
         }
     }
 
+    fun getImage(
+        book: Book,
+        src: String,
+        width: Int
+    ): Bitmap {
+        val vFile = BookHelp.getImage(book, src)
+        @Suppress("BlockingMethodInNonBlockingContext")
+        return try {
+            BitmapUtils.decodeBitmap(vFile.absolutePath, width)
+        } catch (e: Exception) {
+            Coroutine.async {
+                putDebug("${vFile.absolutePath} 解码失败\n$e", e)
+                if (FileUtils.readText(vFile.absolutePath).isXml()) {
+                    putDebug("${vFile.absolutePath}为xml，自动删除")
+                    vFile.delete()
+                }
+            }
+            errorBitmap
+        }
+    }
+
 }

app/src/main/java/io/legado/app/utils/BitmapUtils.kt

@@ -44,6 +44,22 @@ object BitmapUtils {
         return BitmapFactory.decodeFile(path, op)
     }
 
+    @Throws(IOException::class)
+    fun decodeBitmap(path: String, width: Int): Bitmap {
+        val op = BitmapFactory.Options()
+        // inJustDecodeBounds如果设置为true,仅仅返回图片实际的宽和高,宽和高是赋值给opts.outWidth,opts.outHeight;
+        op.inJustDecodeBounds = true
+        BitmapFactory.decodeFile(path, op)
+        //获取比例大小
+        val wRatio = ceil((op.outWidth / width).toDouble()).toInt()
+        //如果超出指定大小，则缩小相应的比例
+        if (wRatio > 1) {
+            op.inSampleSize = wRatio
+        }
+        op.inJustDecodeBounds = false
+        return BitmapFactory.decodeFile(path, op)
+    }
+
     /** 从path中获取Bitmap图片
      * @param path 图片路径
      * @return