#鸿蒙通关秘籍#如何通过ArkTS获取用户公共目录路径和权限验证？

首先，使用ohos.file.environment接口可获取不同的公共目录路径，如下载（Download）、文档（Documents）以及桌面（Desktop）目录路径。确保系统支持SystemCapability.FileManagement.File.Environment.FolderObtain能力：

bash if (!canIUse('SystemCapability.FileManagement.File.Environment.FolderObtain')) { console.error('this api is not supported on this device'); return; }

申请权限时，需要在requestPermissions中声明访问相应目录的权限：

bash "requestPermissions" : [ "ohos.permission.READ_WRITE_DOWNLOAD_DIRECTORY", "ohos.permission.READ_WRITE_DOCUMENTS_DIRECTORY", "ohos.permission.READ_WRITE_DESKTOP_DIRECTORY", ]

然后通过以下方式来获取和显示公共目录路径：

bash import { BusinessError } from '@kit.BasicServicesKit'; import { Environment } from '@kit.CoreFileKit';

function getUserDirExample() { try { const downloadPath = Environment.getUserDownloadDir(); console.info(success to getUserDownloadDir: ${downloadPath}); const documentsPath = Environment.getUserDocumentDir(); console.info(success to getUserDocumentDir: ${documentsPath}); const desktopPath = Environment.getUserDesktopDir(); console.info(success to getUserDesktopDir: ${desktopPath}); } catch (error) { const err: BusinessError = error as BusinessError; console.error(failed to get user dir, because: ${JSON.stringify(err)}); } }