harmony 鸿蒙Obtaining Application and File System Space Statistics
Obtaining Application and File System Space Statistics
This topic describes how to obtain information about the free system space and space occupied by applications so as to prevent insufficient storage space of the system or ensure proper use of quota-controlled cacheDir directories.
Available APIs
For details about the APIs, see ohos.file.statvfs and ohos.file.storageStatistics.
Table 1 APIs for file system and application space statistics
Module | API | Description |
---|---|---|
\@ohos.file.storageStatistics | getCurrentBundleStats | Obtains the storage space of the current application, in bytes. |
\@ohos.file.statvfs | getFreeSize | Obtains the free space of a file system, in bytes. |
\@ohos.file.statvfs | getTotalSize | Obtains the total space of a file system, in bytes. |
Table 2 Attributes for application space statistics
BundleStats Attribute | Description | Directory for Statistics |
---|---|---|
appSize | Size of the application installation files, in bytes. | /data/storage/el1/bundle |
cacheSize | Size of the application cache files, in bytes. | /data/storage/el1/base/cache /data/storage/el1/base/haps/entry/cache /data/storage/el2/base/cache /data/storage/el2/base/haps/entry/cache |
dataSize | Size of the application files (excluding the application installation files and cache files), in bytes. | The application files include local files, distributed files, and database files. - Local application file directories (parent directories of the cache directories): /data/storage/el1/base /data/storage/el2/base - Distributed application directory: /data/storage/el2/distributedfiles - Database directories: /data/storage/el1/database /data/storage/el2/database |
Development Example
- Obtain the free space of /data of the file system.
import statvfs from '@ohos.file.statvfs';
import { BusinessError } from '@ohos.base';
let path = "/data";
statvfs.getFreeSize(path, (err: BusinessError, number: number) => {
if (err) {
console.error(`Invoke getFreeSize failed, code is ${err.code}, message is ${err.message}`);
} else {
console.info(`Invoke getFreeSize succeeded, size is ${number}`);
}
});
- Obtain the space occupied by the current application.
import storageStatistics from "@ohos.file.storageStatistics";
import { BusinessError } from '@ohos.base';
storageStatistics.getCurrentBundleStats((err: BusinessError, bundleStats: storageStatistics.BundleStats) => {
if (err) {
console.error(`Invoke getCurrentBundleStats failed, code is ${err.code}, message is ${err.message}`);
} else {
console.info(`Invoke getCurrentBundleStats succeeded, appsize is ${bundleStats.appSize}`);
}
});
你可能感兴趣的鸿蒙文章
harmony 鸿蒙Accessing Application Files
harmony 鸿蒙Backup and Restoration Accessed by Applications
harmony 鸿蒙Application Data Backup and Restoration Overview
harmony 鸿蒙Backup and Restoration Triggered by System Applications
harmony 鸿蒙Application File Overview
harmony 鸿蒙Uploading and Downloading an Application File
harmony 鸿蒙Application Sandbox Directory
harmony 鸿蒙Developing a File Manager Application (for System Applications Only)
- 所属分类: 后端技术
- 本文标签:
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦