HarmonyOS Next开发学习手册——获取并使用公共目录

最新推荐文章于 2025-03-10 11:49:06 发布

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最新推荐文章于 2025-03-10 11:49:06 发布

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分类专栏： HarmonyOS 移动开发鸿蒙开发文章标签： harmonyos 学习华为组件化开发前端 ArkTS 鸿蒙开发

本文链接：https://blog.youkuaiyun.com/maniuT/article/details/140690340

版权

通过 ArkTS 接口获取并访问公共目录

目录环境能力接口（ohos.file.environment）提供获取公共目录路径的能力，支持三方应用在公共文件用户目录下进行文件访问操作。

约束限制

使用此方式，需确认设备具有以下系统能力：SystemCapability.FileManagement.File.Environment.FolderObtain。

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

公共目录获取接口仅用于获取公共目录路径，不对公共目录访问权限进行校验。若需访问公共目录需申请对应的公共目录访问权限。三方应用需要访问公共目录时，需通过弹窗授权向用户申请授予 Download 目录权限、Documents 目录权限或 Desktop 目录权限，具体参考访问控制-向用户申请授权。

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

示例

 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)}`);
     }
 }

以 Download 目录为例，访问 Download 目录下的文件。

 import { BusinessError } from '@kit.BasicServicesKit';
 import { Environment } from '@kit.CoreFileKit';
 import { fileIo as fs } from '@kit.CoreFileKit';
 import { common } from '@kit.AbilityKit';

 function readUserDownloadDirExample() {
     // 检查是否具有 READ_WRITE_DOWNLOAD_DIRECTORY 权限，无权限则需要向用户申请授予权限。
     try {
         // 获取 Download 目录
         const downloadPath = Environment.getUserDownloadDir();
         console.info(`success to getUserDownloadDir: ${downloadPath}`);
         const context = getContext() as common.UIAbilityContext;
         const dirPath = context.filesDir;
         console.info(`succ

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