!1895 update storage statistics api

Merge pull request !1895 from zhangxingxia/master

zh-cn/application-dev/reference/apis/js-apis-storage-statistics.md

@@ -6,7 +6,7 @@
 ## 导入模块
 
 ```js
-import storagestatistics from "@ohos.storagestatistics";
+import storagestatistics from "@ohos.storageStatistics";
 ```
 
 ## 系统能力
@@ -61,9 +61,10 @@ getTotalSizeOfVolume(volumeUuid: string, callback:AsyncCallback<number>):v
   let uuid = "";
   storagestatistics.getTotalSizeOfVolume(uuid, function(error, number){
       // do something
+      console.info("getTotalSizeOfVolume successfully:"+ number);
   });
   ```
-
+  
   
 
 ## storagestatistics.getFreeSizeOfVolume
@@ -115,22 +116,22 @@ getFreeSizeOfVolume(volumeUuid: string, callback:AsyncCallback<number>):vo
   let uuid = "";
   storagestatistics.getFreeSizeOfVolume(uuid, function(error, number){
       // do something
+      console.info("getFreeSizeOfVolume successfully:"+ number);
   });
   ```
 
-## storagestatistics.getBundleStats
+## storagestatistics.getBundleStats<sup>9+</sup>
 
-getBundleStats(volumeUuid: string,  packageName:String, ): Promise&lt;BundleStats&gt;
+getBundleStats(packageName:String, ): Promise&lt;BundleStats&gt;
 
-异步获取指定卷上的应用存储状态，以promise方式返回。
+异步获取应用存储状态，以promise方式返回。
 
 - 参数
 
   | 参数名      | 类型   | 必填 | 说明     |
   | ----------- | ------ | ---- | -------- |
-  | volumeUuid  | string | 是   | 卷id     |
   | packageName | string | 是   | 应用包名 |
-
+  
 - 返回值
 
   | 类型                                       | 说明                       |
@@ -140,35 +141,33 @@ getBundleStats(volumeUuid: string,  packageName:String, ): Promise&lt;BundleStat
 - 示例
 
   ```js
-  let uuid = "";
   let packageName = "";
-  storagestatistics.getBundleStats(uuid, packageName).then(function(BundleStats){
+  storagestatistics.getBundleStats(packageName).then(function(BundleStats){
       console.info("getBundleStats successfully:"+ JSON.stringify(BundleStats));
   }).catch(function(err){
       console.info("getBundleStats failed with error:"+ err);
   });
   ```
 
-## storagestatistics.getBundleStats
+## storagestatistics.getBundleStats<sup>9+</sup>
 
-getBundleStats(volumeUuid: string, callback:AsyncCallback&lt;BundleStats&gt;):void
+getBundleStats(callback:AsyncCallback&lt;BundleStats&gt;):void
 
-异步获取指定卷上的应用存储状态，以callback方式返回。
+异步获取应用存储状态，以callback方式返回。
 
 - 参数
 
-  | 参数名     | 类型                                                      | 必填 | 说明                                 |
-  | ---------- | --------------------------------------------------------- | ---- | ------------------------------------ |
-  | volumeUuid | string                                                    | 是   | 卷id                                 |
-  | callback   | callback:AsyncCallback&lt;[Bundlestats](#bundlestats)&gt; | 是   | 获取指定卷上的应用存储状态之后的回调 |
-
+  | 参数名   | 类型                                                      | 必填 | 说明                                 |
+  | -------- | --------------------------------------------------------- | ---- | ------------------------------------ |
+  | callback | callback:AsyncCallback&lt;[Bundlestats](#bundlestats)&gt; | 是   | 获取指定卷上的应用存储状态之后的回调 |
+  
 - 示例
 
   ```js
-  let uuid = "";
   let packageName = "";
-  storagestatistics.getBundleStats(uuid, packageName, function(error, BundleStats){
+  storagestatistics.getBundleStats(packageName, function(error, BundleStats){
       // do something
+      console.info("getBundleStats successfully:"+ JSON.stringify(BundleStats));
   });
   ```