目录

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 { hilog } from '@kit.PerformanceAnalysisKit';
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。

      const TAG: string = 'FileGuard_Scan';
const DOMAIN: number = 0x0000;

/**
 * 启动公共目录文件扫描任务
 */
function startFileScanTaskUnderCommonDir() {
  let guard: fileGuard.FileGuard = new fileGuard.FileGuard();
  let onReceiveFileList: (files: string[]) => void = (files: Array<string>) => {
    files.forEach((value: string) => {
      hilog.info(DOMAIN, TAG, `Succeeded in getting file: ${value}.`);
    })
  };
  let onCompleteScanTask: (count: number) => void = (count: number) => {
    hilog.info(DOMAIN, TAG, `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。

      const TAG: string = 'FileGuard_Scan';
const DOMAIN: number = 0x0000;

// ...
/**
 * 启动指定目录文件扫描任务
 */
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) => {
      hilog.info(DOMAIN, TAG, `Succeeded in getting file: ${value}.`);
    })
  };
  let onCompleteScanTask: (count: number) => void = (count: number) => {
    hilog.info(DOMAIN, TAG, `Succeeded in getting count: ${count}.`);
  };
  let scanFileCallback: fileGuard.ScanFileCallback = {
    onReceiveFileList: onReceiveFileList,
    onTaskCompleted: onCompleteScanTask
  };
  guard.startFileScanTask(path, scanFileCallback);
}