启动文件扫描任务

场景介绍

Enterprise Data Guard Kit为应用提供公共路径和指定目录的扫描能力，获取对应目录下的文件列表。

接口说明

详细接口说明可参考接口文档。

接口名	描述
startFileScanTask(type: CommonDirScanType, callback: ScanFileCallback, batchNum?: number): void	通过Callback的方式，扫描公共目录并返回结果。
startFileScanTask(path: string, callback: ScanFileCallback, batchNum?: number): void	通过Callback的方式，扫描指定目录并返回结果。

开发步骤

1. 导入模块。

   import { fileGuard } from '@kit.EnterpriseDataGuardKit';

2. 初始化FileGuard对象guard，并且声明扫描结果回调函数。

   • 按照文件类型扫描公共空间文件，查看打印结果。

     function startFileScanTaskUnderCommonDir() {
       let guard: fileGuard.FileGuard = new fileGuard.FileGuard();
       let onReceiveFileList: (files: string[]) => void = (files: Array<string>) => {
         files.forEach((value: string, index: number) => {
           console.info(`Succeeded in getting file: ${value}.`);
         })
       };
       let onCompleteScanTask: (count: number) => void = (count: number) => {
         console.info(`Succeeded in getting count: ${count}.`);
       };
       let scanFileCallback: fileGuard.ScanFileCallback = {
         onReceiveFileList: onReceiveFileList,
         onTaskCompleted: onCompleteScanTask
       };
       guard.startFileScanTask(fileGuard.CommonDirScanType.MEDIA_ONLY, scanFileCallback);
     }

   • 扫描公共空间指定路径下的文件，查看打印结果。

     function startFileScanTaskUnderSpecifiedDir() {
       let guard: fileGuard.FileGuard = new fileGuard.FileGuard();
       let path: string = '/data/service/el2/test';
       let onReceiveFileList: (files: string[]) => void = (files: Array<string>) => {
         files.forEach((value: string, index: number) => {
           console.info(`Succeeded in getting file: ${value}.`);
         })
       };
       let onCompleteScanTask: (count: number) => void = (count: number) => {
         console.info(`Succeeded in getting count: ${count}.`);
       };
       let scanFileCallback: fileGuard.ScanFileCallback = {
         onReceiveFileList: onReceiveFileList,
         onTaskCompleted: onCompleteScanTask
       };
       guard.startFileScanTask(path, scanFileCallback);
     }