判断和处理imageSource.getImageInfo为空的场景，返回错误信息

Signed-off-by: madixin <madixin@huawei.com>

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## 3.2.0
-- PixelMap size exceeds the maximum value of memory cache and is not cached
+- Fix bug: PixelMap size exceeds the maximum value of memory cache and is not cached
+- Dealing with exception scenarios where imageSource.getImageInfo return undefined
+
 ## 3.2.0-rc.2
 - Added callback information for image loading
 - Added the interface for obtaining the upper limit and size of the current cache and the number of images corresponding to the current cache

library/src/main/ets/ImageKnifeLoader.ets

@@ -123,7 +123,12 @@ export class ImageKnifeLoader {
       return
     }
 
-    let size = (await imageSource.getImageInfo()).size
+    let imageInfoSync = imageSource.getImageInfoSync()
+    if (imageInfoSync == undefined){
+      ImageKnifeLoader.makeEmptyResult(request, "Fail to get image info of imageSource")
+      return
+    }
+    let size = imageInfoSync.size
     callBackData.imageWidth = size.width;
     callBackData.imageHeight = size.height;
     try {
@@ -194,7 +199,12 @@ export class ImageKnifeLoader {
       return
     }
 
-    let size = (await imageSource.getImageInfo()).size
+    let imageInfoSync = imageSource.getImageInfoSync()
+    if (imageInfoSync == undefined){
+      ImageKnifeLoader.makeEmptyResult(request, "Fail to get image info of imageSource")
+      return
+    }
+    let size = imageInfoSync.size
     let scale = size.height / size.width
     let hValue = Math.round(request.componentHeight);
     let wValue = Math.round(request.componentWidth);
@@ -265,7 +275,12 @@ export class ImageKnifeLoader {
     }
 
     let frameCount = await imageSource.getFrameCount()
-    let size = (await imageSource.getImageInfo()).size
+    let imageInfoSync = imageSource.getImageInfoSync()
+    if (imageInfoSync == undefined){
+      ImageKnifeLoader.makeEmptyResult(request, "Fail to get image info of imageSource")
+      return
+    }
+    let size = imageInfoSync.size
     callBackData.frameCount = frameCount;
     callBackData.imageWidth = size.width;
     callBackData.imageHeight = size.height;