diff --git a/library/src/main/ets/downsampling/DownsampleStartegy.ets b/library/src/main/ets/downsampling/DownsampleStartegy.ets
index 8fe9694..65d1c16 100644
--- a/library/src/main/ets/downsampling/DownsampleStartegy.ets
+++ b/library/src/main/ets/downsampling/DownsampleStartegy.ets
@@ -101,7 +101,6 @@ export class CenterInside implements BaseDownsampling {
   getScaleFactor(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number,
     downsampType: DownsampleStrategy
   ): number {
-
     let outSize: Size = {
       width: round(Math.min(1, getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType)) * sourceWidth),
       height:round(Math.min(1, getScale(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType)) * sourceHeight)
@@ -127,17 +126,7 @@ export class CenterInside implements BaseDownsampling {
       return SampleSizeRounding.QUALITY
     }
     //否则，使用 FIL_CENTER 的 SampleSizeRounding 值
-    return this.getSampleSize(sourceWidth, sourceHeight, requestedWidth, requestedHeight, downsampType);
-  }
-
-  getSampleSize(sourceWidth: number, sourceHeight: number, requestedWidth: number, requestedHeight: number,
-    downsampType: DownsampleStrategy
-  ): SampleSizeRounding {
-    if (downsampType === DownsampleStrategy.CENTER_INSIDE_MEMORY) {
-      return SampleSizeRounding.MEMORY;
-    } else {
-      return SampleSizeRounding.QUALITY;
-    }
+    return downsampType === DownsampleStrategy.CENTER_INSIDE_MEMORY?SampleSizeRounding.MEMORY:SampleSizeRounding.QUALITY
   }
 }