diff --git a/interfaces/kits/ani/printani/ets/@ohos.print.ets b/interfaces/kits/ani/printani/ets/@ohos.print.ets
index 84bf44fb085462a00e7a2f20a56444be176ccd70..f6164badfa39f72a53cc065720543158ee4c7852 100644
--- a/interfaces/kits/ani/printani/ets/@ohos.print.ets
+++ b/interfaces/kits/ani/printani/ets/@ohos.print.ets
@@ -454,15 +454,15 @@ export default namespace print {
     native function onJobStateChangeNative(type: 'jobStateChange', callback: JobStateChangeWrapper) : int;
 
     native function onExtInfoChangeNative(type: 'extInfoChange', callback: ExtInfoChangeWrapper) : int;
-    
+
     native function onPrintTask(type: string, callback: CallbackWrapper<void>, task : PrintTaskImpl) : void;
 
     native function offPrintTask(type: string, callback: CallbackWrapper<void>, task : PrintTaskImpl) : void;
 
     native function offNative(type: string, callback: CallbackWrapper<void>) : int;
-    
+
     native function queryAllPrinterExtensionInfosNative(callback: AsyncCallbackArrayWrapper<PrinterExtensionInfo>): void;
-    
+
     native function startDiscoverPrinterNative(extensionList: Array<string>, callback: AsyncCallbackWrapper<void>): void;
 
     native function stopDiscoverPrinterNative(callback: AsyncCallbackWrapper<void>): void;
@@ -516,7 +516,7 @@ export default namespace print {
     native function addPrinterToDiscoveryNative(printerInformation: PrinterInformation, callback: AsyncCallbackWrapper<void>): void;
 
     native function updatePrinterInDiscoveryNative(printerInformation: PrinterInformation, callback: AsyncCallbackWrapper<void>): void;
-    
+
     native function removePrinterFromDiscoveryNative(printerId: string, callback: AsyncCallbackWrapper<void>): void;
 
     native function getPrinterInformationByIdNative(printerId: string, callback: AsyncCallbackWrapper<PrinterInformation>): void;
@@ -538,8 +538,8 @@ export default namespace print {
             onPrintTask(type, myCall, this);
         }
         off(type: 'block' | 'succeed' | 'fail' | 'cancel', callback?: Callback<void>): void {
-            let myCall = new CallbackWrapper<void>(() => {});
-            
+            let myCall = new CallbackWrapper<void>((): void => {});
+
             if (callback !== undefined) {
                 myCall = new CallbackWrapper<void>(callback);
             }
@@ -554,9 +554,9 @@ export default namespace print {
         })
     }
 
-    export function print(files: Array<string>): Promise<PrintTask> {
-        let p:Promise<PrintTask> =
-            new Promise<PrintTask>((resolve: (data: PrintTask | undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+    export function print(files: Array<string>): Promise<PrintTask|undefined> {
+        let p:Promise<PrintTask|undefined> =
+            new Promise<PrintTask|undefined>((resolve: (data: PrintTask | undefined)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<PrintTask>((err: BusinessError<void> | null, data: PrintTask | undefined)=>{
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -578,9 +578,9 @@ export default namespace print {
         })
     }
 
-    export function print(files: Array<string>, context: Context): Promise<PrintTask> {
-        let p:Promise<PrintTask> =
-            new Promise<PrintTask>((resolve: (data: PrintTask | undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+    export function print(files: Array<string>, context: Context): Promise<PrintTask | undefined> {
+        let p:Promise<PrintTask | undefined> =
+            new Promise<PrintTask | undefined>((resolve: (data: PrintTask | undefined)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<PrintTask>((err: BusinessError<void> | null, data: PrintTask | undefined)=>{
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -596,9 +596,9 @@ export default namespace print {
     }
 
     export function print(jobName: string, printAdapter: PrintDocumentAdapter, printAttributes: PrintAttributes,
-    context: Context): Promise<PrintTask> {
-        let p:Promise<PrintTask> =
-            new Promise<PrintTask>((resolve: (data: PrintTask | undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+    context: Context): Promise<PrintTask | undefined> {
+        let p:Promise<PrintTask | undefined> =
+            new Promise<PrintTask | undefined>((resolve: (data: PrintTask | undefined)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<PrintTask>((err: BusinessError<void> | null, data: PrintTask | undefined)=>{
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -626,9 +626,9 @@ export default namespace print {
         })
     }
 
-    export function queryAllPrinterExtensionInfos(): Promise<Array<PrinterExtensionInfo>> {
-        let p:Promise<Array<PrinterExtensionInfo>> =
-            new Promise<Array<PrinterExtensionInfo>>((resolve: (data: Array<PrinterExtensionInfo> | undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+    export function queryAllPrinterExtensionInfos(): Promise<Array<PrinterExtensionInfo> | undefined> {
+        let p:Promise<Array<PrinterExtensionInfo> | undefined> =
+            new Promise<Array<PrinterExtensionInfo> | undefined>((resolve: (data: Array<PrinterExtensionInfo> | undefined)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackArrayWrapper<PrinterExtensionInfo>((err: BusinessError<void> | null, data: Array<PrinterExtensionInfo> | undefined)=>{
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -651,10 +651,10 @@ export default namespace print {
     }
 
     export function startDiscoverPrinter(extensionList: Array<string>): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -674,10 +674,10 @@ export default namespace print {
     }
 
     export function stopDiscoverPrinter(): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -696,10 +696,10 @@ export default namespace print {
     }
 
     export function connectPrinter(printerId: string): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -718,10 +718,10 @@ export default namespace print {
     }
 
     export function disconnectPrinter(printerId: string): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -740,10 +740,10 @@ export default namespace print {
     }
 
     export function queryPrinterCapability(printerId: string): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -762,10 +762,10 @@ export default namespace print {
     }
 
     export function startPrintJob(jobInfo: PrintJob): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -784,10 +784,10 @@ export default namespace print {
     }
 
     export function cancelPrintJob(jobId: string): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -805,9 +805,9 @@ export default namespace print {
         });
     }
 
-    export function requestPrintPreview(jobInfo: PrintJob): Promise<int> {
-        return new Promise<int>((resolve: (data:int | undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
-            let myCall = new AsyncCallbackWrapper<int>((err, data) => {
+    export function requestPrintPreview(jobInfo: PrintJob): Promise<int|undefined> {
+        return new Promise<int|undefined>((resolve: (data:int|undefined)=>void, reject:(err: BusinessError<void>)=>void):void => {
+            let myCall = new AsyncCallbackWrapper<int>((err, data): void => {
                 if (err === null || err.code == 0) {
                     resolve(data);
                 } else {
@@ -820,7 +820,7 @@ export default namespace print {
         });
     }
 
-    
+
 
     export class PrinterStateChangeWrapper {
         private myFun_: (state: PrinterState, info: PrinterInfo) => void;
@@ -891,12 +891,12 @@ export default namespace print {
     }
 
     export function off(type: 'printerStateChange' | 'jobStateChange' | 'extInfoChange', callback?: Callback<void>): void {
-        let myCall = new CallbackWrapper<void>(() => {});
-        
+        let myCall = new CallbackWrapper<void>((): void => {});
+
         if (callback !== undefined) {
             myCall = new CallbackWrapper<void>(callback);
         }
-        
+
         taskpool.execute((): void => {
             offNative(type, myCall);
         });
@@ -910,10 +910,10 @@ export default namespace print {
     }
 
     export function addPrinters(printers: Array<PrinterInfo>): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -932,10 +932,10 @@ export default namespace print {
     }
 
     export function removePrinters(printerIds: Array<string>): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -954,10 +954,10 @@ export default namespace print {
     }
 
     export function updatePrinters(printers: Array<PrinterInfo>): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -976,10 +976,10 @@ export default namespace print {
     }
 
     export function updatePrinterState(printerId: string, state: PrinterState): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -998,10 +998,10 @@ export default namespace print {
     }
 
     export function updatePrintJobState(jobId: string, state: PrintJobState, subState: PrintJobSubState): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1020,10 +1020,10 @@ export default namespace print {
     }
 
     export function updateExtensionInfo(info: string): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1042,10 +1042,10 @@ export default namespace print {
     }
 
     export function queryAllPrintJobs(): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1063,8 +1063,8 @@ export default namespace print {
         });
     }
 
-    export function queryPrintJobList(): Promise<Array<PrintJob>> {
-        return new Promise<Array<PrintJob>>((resolve: (data: Array<PrintJob> | undefined)=>void, reject:(err: BusinessError<void> | null)=>void): void => {
+    export function queryPrintJobList(): Promise<Array<PrintJob> | undefined> {
+        return new Promise<Array<PrintJob> | undefined>((resolve: (data: Array<PrintJob> | undefined)=>void, reject:(err: BusinessError<void>)=>void): void => {
             let myCall = new AsyncCallbackArrayWrapper<PrintJob>((err : BusinessError<void> | null, data : Array<PrintJob>|undefined) => {
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -1085,8 +1085,8 @@ export default namespace print {
         });
     }
 
-    export function queryPrintJobById(jobId: string): Promise<PrintJob> {
-        return new Promise<PrintJob>((resolve: (data: PrintJob | undefined)=>void, reject:(err: BusinessError<void> | null)=>void): void => {
+    export function queryPrintJobById(jobId: string): Promise<PrintJob | undefined> {
+        return new Promise<PrintJob | undefined>((resolve: (data: PrintJob | undefined)=>void, reject:(err: BusinessError<void>)=>void): void => {
             let myCall = new AsyncCallbackWrapper<PrintJob>((err : BusinessError<void> | null, data : PrintJob|undefined) => {
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -1116,10 +1116,10 @@ export default namespace print {
     }
 
     export function notifyPrintService(jobId: string, type: string): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1130,8 +1130,8 @@ export default namespace print {
         });
     }
 
-    export function getAddedPrinters(): Promise<Array<string>> {
-        return new Promise<Array<string>>((resolve: (data: Array<string> | undefined)=>void, reject:(err: BusinessError<void> | null)=>void): void => {
+    export function getAddedPrinters(): Promise<Array<string> | undefined> {
+        return new Promise<Array<string> | undefined>((resolve: (data: Array<string> | undefined)=>void, reject:(err: BusinessError<void>)=>void): void => {
             let myCall = new AsyncCallbackArrayWrapper<string>((err : BusinessError<void> | null, data : Array<string> | undefined) => {
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -1145,8 +1145,8 @@ export default namespace print {
         });
     }
 
-    export function getPrinterInfoById(printerId: string): Promise<PrinterInfo> {
-        return new Promise<PrinterInfo>((resolve: (data: PrinterInfo | undefined)=>void, reject:(err: BusinessError<void> | null)=>void): void => {
+    export function getPrinterInfoById(printerId: string): Promise<PrinterInfo | undefined> {
+        return new Promise<PrinterInfo | undefined>((resolve: (data: PrinterInfo | undefined)=>void, reject:(err: BusinessError<void>)=>void): void => {
             let myCall = new AsyncCallbackWrapper<PrinterInfo>((err : BusinessError<void> | null, data : PrinterInfo | undefined) => {
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -1161,10 +1161,10 @@ export default namespace print {
     }
 
     export function notifyPrintServiceEvent(event: ApplicationEvent): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1176,10 +1176,10 @@ export default namespace print {
     }
 
     export function addPrinterToDiscovery(printerInformation: PrinterInformation): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1191,10 +1191,10 @@ export default namespace print {
     }
 
     export function updatePrinterInDiscovery(printerInformation: PrinterInformation): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1206,10 +1206,10 @@ export default namespace print {
     }
 
     export function removePrinterFromDiscovery(printerId: string): Promise<void> {
-        return new Promise<void>((resolve: (data:undefined)=>void, reject:(err: BusinessError<void> | null)=>void):void => {
+        return new Promise<void>((resolve: (data: PromiseLike<void>)=>void, reject:(err: BusinessError<void>)=>void):void => {
             let myCall = new AsyncCallbackWrapper<void>((err : BusinessError<void> | null) => {
                 if (err === null || err.code == 0) {
-                    resolve(undefined);
+                    resolve(Promise.resolve());
                 } else {
                     reject(err);
                 }
@@ -1220,8 +1220,8 @@ export default namespace print {
         });
     }
 
-    export function getPrinterInformationById(printerId: string): Promise<PrinterInformation> {
-        return new Promise<PrinterInformation>((resolve: (data: PrinterInformation | undefined)=>void, reject:(err: BusinessError<void> | null)=>void): void => {
+    export function getPrinterInformationById(printerId: string): Promise<PrinterInformation | undefined> {
+        return new Promise<PrinterInformation | undefined>((resolve: (data: PrinterInformation | undefined)=>void, reject:(err: BusinessError<void>)=>void): void => {
             let myCall = new AsyncCallbackWrapper<PrinterInformation>((err : BusinessError<void> | null, data : PrinterInformation | undefined) => {
                 if (err === null || err.code == 0) {
                     resolve(data);
@@ -1235,4 +1235,3 @@ export default namespace print {
         });
     }
 }
-