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+# quickFixManager
+
+The **quickFixManager** module provides APIs for quick fix. With quick fix, you can fix bugs in your application by applying patches, which is more efficient than by updating the entire application.
+
+> **NOTE**
+> 
+> The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+## Modules to Import
+
+```
+import quickFixManager from '@ohos.application.quickFixManager';
+```
+
+## HapModuleQuickFixInfo
+
+Defines the quick fix information at the HAP file level.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.QuickFix
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+| Name       | Readable/Writable| Type                | Mandatory| Description                                                        |
+| ----------- | -------- | -------------------- | ---- | ------------------------------------------------------------ |
+| moduleName    | Read only    | string               | Yes  | Name of the HAP file.                              |
+| originHapHash    | Read only    | string               | Yes  | Hash value of the HAP file.                              |
+| quickFixFilePath    | Read only    | string               | Yes  | Installation path of the quick fix file.                              |
+
+## ApplicationQuickFixInfo
+
+Defines the quick fix information at the application level.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.QuickFix
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+| Name       | Readable/Writable| Type                | Mandatory| Description                                                        |
+| ----------- | -------- | -------------------- | ---- | ------------------------------------------------------------ |
+| bundleName    | Read only    | string               | Yes  | Bundle name of the application.                              |
+| bundleVersionCode    | Read only    | number               | Yes  | Internal version number of the application.                              |
+| bundleVersionName    | Read only    | string               | Yes  | Version number of the application that is shown to users.                              |
+| quickFixVersionCode    | Read only    | number               | Yes  | Version code of the quick fix patch package.                              |
+| quickFixVersionName    | Read only    | string               | Yes  | Text description of the version number of the quick fix patch package.                              |
+| hapModuleQuickFixInfo    | Read only    | Array\<[HapModuleQuickFixInfo](#hapmodulequickfixinfo)>      | Yes  | Quick fix information at the HAP file level.    |
+
+## quickFixManager.applyQuickFix
+
+applyQuickFix(hapModuleQuickFixFiles: Array\<string>, callback: AsyncCallback\<void>): void;
+
+Applies a quick fix patch. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.INSTALL_BUNDLE
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.QuickFix
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+  | Parameter| Type| Mandatory| Description| 
+  | -------- | -------- | -------- | -------- |
+  | hapModuleQuickFixFiles | Array\<string> | No| Quick fix files, each of which must contain a valid file path.| 
+  | callback | AsyncCallback\<void> | No| Callback used to return the result.| 
+
+**Example**
+    
+```js
+  import quickFixManager from '@ohos.application.quickFixManager'
+
+  let hapModuleQuickFixFiles = ["/data/storage/el2/base/entry.hqf"]
+  quickFixManager.applyQuickFix(hapModuleQuickFixFiles, (error) => {
+      if (error) {
+          console.info( `applyQuickFix failed with error + ${error}`)
+      } else {
+          console.info( 'applyQuickFix success')
+      }
+  })
+```
+
+## quickFixManager.applyQuickFix
+
+applyQuickFix(hapModuleQuickFixFiles: Array\<string>): Promise\<void>;
+
+Applies a quick fix patch. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.INSTALL_BUNDLE
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.QuickFix
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+  | Parameter| Type| Mandatory| Description| 
+  | -------- | -------- | -------- | -------- |
+  | hapModuleQuickFixFiles | Array\<string> | No| Quick fix files, each of which must contain a valid file path.| 
+
+**Return value**
+
+  | Type| Description| 
+  | -------- | -------- |
+  | Promise\<void> | Promise used to return the result.| 
+
+**Example**
+    
+```js
+  import quickFixManager from '@ohos.application.quickFixManager'
+
+  let hapModuleQuickFixFiles = ["/data/storage/el2/base/entry.hqf"]
+  quickFixManager.applyQuickFix(hapModuleQuickFixFiles).then(() => {
+    console.info('applyQuickFix success')
+  }).catch((error) => {
+    console.info(`applyQuickFix err: + ${error}`)
+  })
+```
+
+## quickFixManager.getApplicationQuickFixInfo
+
+getApplicationQuickFixInfo(bundleName: string, callback: AsyncCallback\<ApplicationQuickFixInfo>): void;
+
+Obtains the quick fix information of the application. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.GET_BUNDLE_INFO_PRIVILEGED
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.QuickFix
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+  | Parameter| Type| Mandatory| Description| 
+  | -------- | -------- | -------- | -------- |
+  | bundleName | string | No|Bundle name of the application. | 
+  | callback | AsyncCallback\<[ApplicationQuickFixInfo](#applicationquickfixinfo)> | No| Callback used to return the quick fix information.| 
+
+**Example**
+    
+```js
+  import quickFixManager from '@ohos.application.quickFixManager'
+
+  let bundleName = "bundleName"
+  quickFixManager.getApplicationQuickFixInfo(bundleName, (error, data) => {
+    if (error) {
+      console.info(`getApplicationQuickFixInfo error: + ${error}`)
+    } else {
+      console.info(`getApplicationQuickFixInfo success: + ${data}`)
+    }
+  })  
+```
+
+## quickFixManager.getApplicationQuickFixInfo
+
+getApplicationQuickFixInfo(bundleName: string): Promise\<ApplicationQuickFixInfo>;
+
+Obtains the quick fix information of the application. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.GET_BUNDLE_INFO_PRIVILEGED
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.QuickFix
+
+**System API**: This is a system API and cannot be called by third-party applications.
+
+**Parameters**
+
+  | Parameter| Type| Mandatory| Description| 
+  | -------- | -------- | -------- | -------- |
+  | bundleName | string | No| Bundle name of the application. | 
+
+**Return value**
+
+  | Type| Description| 
+  | -------- | -------- |
+  | Promise\<[ApplicationQuickFixInfo](#applicationquickfixinfo)> | Promise used to return the quick fix information.| 
+
+**Example**
+    
+  ```js 
+  import quickFixManager from '@ohos.application.quickFixManager'
+
+  let bundleName = "bundleName"
+  quickFixManager.getApplicationQuickFixInfo(bundleName).then((data) => {
+    console.info(`getApplicationQuickFixInfo success: + ${data}`)
+  }).catch((error) => {
+    console.info(`getApplicationQuickFixInfo err: + ${error}`)
+  })
+```