@ohos.filemanagement.userFileManager (User Data Management)

The userFileManager module provides user data management capabilities, including accessing and modifying user media data (audio and video clips, images, and files).

NOTE

• The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
• The APIs provided by this module are system APIs.

Modules to Import

import userFileManager from '@ohos.filemanagement.userFileManager';

userFileManager.getUserFileMgr

getUserFileMgr(context: Context): UserFileManager

Obtains a UserFileManager instance. This instance can be used to access and modify user media data (such as audio and video clips, images, and files).

Model restriction: This API can be used only in the stage model.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

// The userFileManager instance obtained is a global object. It is used by default in subsequent operations. If the code snippet is not added, an error will be reported indicating that mgr is not defined.
const context = getContext(this);
let mgr = userFileManager.getUserFileMgr(context);

UserFileManager

getPhotoAssets

getPhotoAssets(options: FetchOptions, callback: AsyncCallback<FetchResult<FileAsset>>): void;

Obtains image and video assets. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_IMAGEVIDEO

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getPhotoAssets');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOptions = {
    fetchColumns: [],
    predicates: predicates
  };

  mgr.getPhotoAssets(fetchOptions, async (err, fetchResult) => {
    if (fetchResult != undefined) {
      console.info('fetchResult success');
      let fileAsset = await fetchResult.getFirstObject();
      if (fileAsset != undefined) {
        console.info("fileAsset.displayName : " + fileAsset.displayName);
      }
    } else {
      console.error('fetchResult fail' + err);
    }
  });
}

getPhotoAssets

getPhotoAssets(options: FetchOptions): Promise<FetchResult<FileAsset>>;

Obtains image and video assets. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_IMAGEVIDEO

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getPhotoAssets');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOptions = {
    fetchColumns: [],
    predicates: predicates
  };
  try {
    let fetchResult = await mgr.getPhotoAssets(fetchOptions);
    if (fetchResult != undefined) {
      console.info('fetchResult success');
      let fileAsset = await fetchResult.getFirstObject();
      if (fileAsset != undefined) {
        console.info("fileAsset.displayName :" + fileAsset.displayName);
      }
    }
  } catch (err) {
    console.error('getPhotoAssets failed, message = ', err);
  }
}

createPhotoAsset

createPhotoAsset(displayName: string, albumUri: string, callback: AsyncCallback<FileAsset>): void;

Creates an image or video asset. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.WRITE_IMAGEVIDEO

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('createPhotoAssetDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOptions = {
    predicates: predicates
  };
  let albums = await mgr.getPhotoAlbums(fetchOptions);
  let album = await albums.getFirstObject();
  let testFileName = "testFile" + Date.now() + ".jpg";
  mgr.createPhotoAsset(testFileName, album.albumUri, (err, fileAsset) => {
    if (fileAsset != undefined) {
      console.info('createPhotoAsset file displayName' + fileAsset.displayName);
      console.info('createPhotoAsset successfully');
    } else {
      console.error('createPhotoAsset failed, message = ', err);
    }
  });
}

createPhotoAsset

createPhotoAsset(displayName: string, callback: AsyncCallback<FileAsset>): void;

Creates an image or video asset. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.WRITE_IMAGEVIDEO

Parameters

Example

async function example() {
  console.info('createPhotoAssetDemo');
  let testFileName = "testFile" + Date.now() + ".jpg";
  mgr.createPhotoAsset(testFileName, (err, fileAsset) => {
    if (fileAsset != undefined) {
      console.info('createPhotoAsset file displayName' + fileAsset.displayName);
      console.info('createPhotoAsset successfully');
    } else {
      console.error('createPhotoAsset failed, message = ', err);
    }
  });
}

createPhotoAsset

createPhotoAsset(displayName: string, albumUri?: string): Promise<FileAsset>;

Creates an image or video asset. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.WRITE_IMAGEVIDEO

Parameters

Return value

Example

async function example() {
  console.info('createPhotoAssetDemo');
  try {
    let testFileName = "testFile" + Date.now() + ".jpg";
    let fileAsset = await mgr.createPhotoAsset(testFileName);
    console.info('createPhotoAsset file displayName' + fileAsset.displayName);
    console.info('createPhotoAsset successfully');
  } catch (err) {
    console.error('createPhotoAsset failed, message = ', err);
  }
}

getPhotoAlbums

getPhotoAlbums(options: AlbumFetchOptions, callback: AsyncCallback<FetchResult<Album>>): void;

Obtains image and video albums. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_IMAGEVIDEO

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getPhotoAlbumsDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let albumFetchOptions = {
    predicates: predicates
  };

  mgr.getPhotoAlbums(albumFetchOptions, (err, fetchResult) => {
    if (fetchResult != undefined) {
      console.info('albums.count = ' + fetchResult.getCount());
      fetchResult.getFirstObject((err, album) => {
        if (album != undefined) {
          console.info('first album.albumName = ' + album.albumName);
        } else {
          console.error('album is undefined, err = ', err);
        }
      });
    } else {
      console.error('getPhotoAlbums fail, message = ', err);
    }
  });
}

getPhotoAlbums

getPhotoAlbums(options: AlbumFetchOptions): Promise<FetchResult<Album>>;

Obtains image and video albums. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_IMAGEVIDEO

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getPhotoAlbumsDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let albumFetchOptions = {
    predicates: predicates
  };
  try {
    let fetchResult = await mgr.getPhotoAlbums(albumFetchOptions);
    console.info('album.count = ' + fetchResult.getCount());
    const album = await fetchResult.getFirstObject();
    console.info('first album.albumName = ' + album.albumName);
  } catch (err) {
    console.error('getPhotoAlbums fail, message = ' + err);
  }
}

getPrivateAlbum

getPrivateAlbum(type: PrivateAlbumType, callback: AsyncCallback<FetchResult<PrivateAlbum>>): void;

Obtains the system album. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_IMAGEVIDEO

Parameters

Example

async function example() {
  console.info('getPrivateAlbumDemo');
  mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH, async (err, fetchResult) => {
    if (fetchResult != undefined) {
      let trashAlbum = await fetchResult.getFirstObject();
      console.info('first album.albumName = ' + trashAlbum.albumName);
    } else {
      console.error('getPrivateAlbum failed. message = ', err);
    }
  });
}

getPrivateAlbum

getPrivateAlbum(type: PrivateAlbumType): Promise<FetchResult<PrivateAlbum>>;

Obtains the system album. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_IMAGEVIDEO

Parameters

Return value

Example

async function example() {
  console.info('getPrivateAlbumDemo');
  try {
    let fetchResult = await mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH);
    let trashAlbum = await fetchResult.getFirstObject();
    console.info('first album.albumName = ' + trashAlbum.albumName);
  } catch (err) {
    console.error('getPrivateAlbum failed. message = ', err);
  }
}

getAudioAssets

getAudioAssets(options: FetchOptions, callback: AsyncCallback<FetchResult<FileAsset>>): void;

Obtains audio assets. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_AUDIO

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getAudioAssets');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOptions = {
    fetchColumns: [],
    predicates: predicates
  };

  mgr.getAudioAssets(fetchOptions, async (err, fetchResult) => {
    if (fetchResult != undefined) {
      console.info('fetchFileResult success');
      let fileAsset = await fetchResult.getFirstObject();
      if (fileAsset != undefined) {
        console.info("fileAsset.displayName :" + fileAsset.displayName);
      }
    } else {
      console.error('fetchFileResult fail' + err);
    }
  });
}

getAudioAssets

getAudioAssets(options: FetchOptions): Promise<FetchResult<FileAsset>>;

Obtains audio assets. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Required permissions: ohos.permission.READ_AUDIO

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getAudioAssets');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOptions = {
    fetchColumns: [],
    predicates: predicates
  };
  try {
    var fetchResult = await mgr.getAudioAssets(fetchOptions);
  } catch (err) {
    console.error('getAudioAssets failed, message = ', err);
  }

  if (fetchResult != undefined) {
    console.info('fetchFileResult success');
    let fileAsset = await fetchResult.getFirstObject();
    if (fileAsset != undefined) {
      console.info("fileAsset.displayName :" + fileAsset.displayName);
    }
  }
}

delete

delete(uri: string, callback: AsyncCallback<void>): void;

Deletes a media file. This API uses an asynchronous callback to return the result. The deleted file is moved to the recycle bin.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.READ_AUDIO, and ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('deleteAssetDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOptions = {
    fetchColumns: [],
    predicates: predicates
  };
  try {
    const fetchResult = await mgr.getPhotoAssets(fetchOptions);
    var asset = await fetchResult.getFirstObject();
  } catch (err) {
    console.info('fetch failed, message =', err);
  }

  if (asset == undefined) {
    console.error('asset not exist');
    return;
  }
  mgr.delete(asset.uri, (err) => {
    if (err == undefined) {
      console.info("delete successfully");
    } else {
      console.error("delete failed with error: " + err);
    }
  });
}

delete

delete(uri: string): Promise<void>;

Deletes a media file. This API uses a promise to return the result. The deleted file is moved to the recycle bin.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.READ_AUDIO, and ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('deleteDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOptions = {
    fetchColumns: [],
    predicates: predicates
  };
  try {
    const fetchResult = await mgr.getPhotoAssets(fetchOptions);
    var asset = await fetchResult.getFirstObject();
  } catch (err) {
    console.info('fetch failed, message =', err);
  }

  if (asset == undefined) {
    console.error('asset not exist');
    return;
  }
  try {
    await mgr.delete(asset.uri);
    console.info("delete successfully");
  } catch (err) {
    console.error("delete failed with error: " + err);
  }
}

on

on(type: ChangeEvent, callback: Callback<void>): void

Subscribes to changes of the file management library. This API uses a callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

async function example() {
  console.info('onDemo');
  let count = 0;
  mgr.on('imageChange', () => {
    count++;
    // Image file changed. Do something.
  });
  try {
    let testFileName = "testFile" + Date.now() + ".jpg";
    let fileAsset = await mgr.createPhotoAsset(testFileName);
    console.info('createPhotoAsset file displayName' + fileAsset.displayName);
    console.info('createPhotoAsset successfully');
  } catch (err) {
    console.error('createPhotoAsset failed, message = ' + err);
  }
  //sleep 1s
  if (count > 0) {
    console.info("onDemo success");
  } else {
    console.error("onDemo fail");
  }
  mgr.off('imageChange', () => {
    // Unsubscription succeeds.
  });
}

off

off(type: ChangeEvent, callback?: Callback<void>): void

Unsubscribes from changes of the file management library. This API uses a callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

async function example() {
  console.info('offDemo');
  let count = 0;
  mgr.on('imageChange', () => {
    count++;
    // Image file changed. Do something.
  });

  mgr.off('imageChange', () => {
    // Unsubscription succeeds.
  });

  try {
    let testFileName = "testFile" + Date.now() + ".jpg";
    let fileAsset = await mgr.createPhotoAsset(testFileName);
    console.info('createPhotoAsset file displayName' + fileAsset.displayName);
    console.info('createPhotoAsset successfully');
  } catch (err) {
    console.error('createPhotoAsset failed, message = ' + err);
  }
  //sleep 1s
  if (count == 0) {
    console.info("offDemo success");
  } else {
    console.error("offDemo fail");
  }
}

getActivePeers

getActivePeers(callback: AsyncCallback<Array<PeerInfo>>): void;

Obtains information about online peer devices. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.DistributedCore

Parameters

Example

async function example() {
  console.info('getActivePeersDemo');
  mgr.getActivePeers((err, devicesInfo) => {
    if (devicesInfo != undefined) {
      console.log('getActivePeers succeed.');
      for (let i = 0; i < devicesInfo.length; i++) {
        console.info('get distributed info ' + devicesInfo[i].deviceName + devicesInfo[i].networkId);
      }
    } else {
      console.error('getActivePeers failed. message = ', err);
    }
  });
}

getActivePeers

getActivePeers(): Promise<Array<PeerInfo>>;

Obtains information about online peer devices. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.DistributedCore

Return value

Example

async function example() {
  console.info('getActivePeersDemo');
  try {
    var devicesInfo = await mgr.getActivePeers();
  } catch (err) {
    console.error('getActivePeers failed. message = ', err);
  }
  if (devicesInfo != undefined) {
    console.log('getActivePeers succeed.');
    for (let i = 0; i < devicesInfo.length; i++) {
      console.info('get distributed info ' + devicesInfo[i].deviceName + devicesInfo[i].networkId);
    }
  } else {
    console.error('get distributed fail');
  }
}

getAllPeers

getAllPeers(callback: AsyncCallback<Array<PeerInfo>>): void;

Obtains information about all peer devices. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.DistributedCore

Parameters

Example

async function example() {
  console.info('getAllPeersDemo');
  mgr.getAllPeers((err, devicesInfo) => {
    if (devicesInfo != undefined) {
      console.log('getAllPeers succeed.');
      for (let i = 0; i < devicesInfo.length; i++) {
        console.info('get distributed info ' + devicesInfo[i].deviceName + devicesInfo[i].networkId);
      }
    } else {
      console.error('getAllPeers failed. message = ', err);
    }
  });
}

getAllPeers

getAllPeers(): Promise<Array<PeerInfo>>;

Obtains information about all peer devices. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.DistributedCore

Return value

Example

async function example() {
  console.info('getAllPeersDemo');
  try {
    var devicesInfo = await mgr.getAllPeers();
  } catch (err) {
    console.error('getAllPeers failed. message = ', err);
  }
  if (devicesInfo != undefined) {
    console.log('getAllPeers succeed.');
    for (let i = 0; i < devicesInfo.length; i++) {
      console.info('get distributed info ' + devicesInfo[i].deviceName + devicesInfo[i].networkId);
    }
  } else {
    console.error('get distributed fail');
  }
}

release

release(callback: AsyncCallback<void>): void

Releases this UserFileManager instance. This API uses an asynchronous callback to return the result. Call this API when the APIs in the UserFileManager instance are no longer used.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

async function example() {
  console.info('releaseDemo');
  mgr.release((err) => {
    if (err != undefined) {
      console.error('release failed. message = ', err);
    } else {
      console.info('release ok.');
    }
  });
}

release

release(): Promise<void>

Releases this UserFileManager instance. This API uses a promise to return the result. Call this API when the APIs in the UserFileManager instance are no longer used.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

async function example() {
  console.info('releaseDemo');
  try {
    await mgr.release();
    console.info('release ok.');
  } catch (err) {
    console.error('release failed. message = ', err);
  }
}

FileAsset

Provides APIs for encapsulating file asset attributes.

Attributes

System capability: SystemCapability.FileManagement.UserFileManager.Core

get

get(member: string): MemberType;

Obtains the value of a FileAsset parameter.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('fileAssetGetDemo');
  try {
    let predicates = new dataSharePredicates.DataSharePredicates();
    let fetchOption = {
      fetchColumns: [],
      predicates: predicates
    };
    let fetchResult = await mgr.getPhotoAssets(fetchOption);
    let fileAsset = await fetchResult.getFirstObject();
    let title = userFileManager.ImageVideoKey.TITLE;
    let fileAssetTitle = fileAsset.get(title.toString());
    console.info('fileAsset Get fileAssetTitle = ', fileAssetTitle);
  } catch (err) {
    console.error('release failed. message = ', err);
  }
}

set

set(member: string, value: string): void;

Sets a FileAsset parameter.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('fileAssetSetDemo');
  try {
    let predicates = new dataSharePredicates.DataSharePredicates();
    let fetchOption = {
      fetchColumns: [],
      predicates: predicates
    };
    let fetchResult = await mgr.getPhotoAssets(fetchOption);
    let fileAsset = await fetchResult.getFirstObject();
    let title = userFileManager.ImageVideoKey.TITLE;
    fileAsset.set(title.toString(), "newTitle");
  } catch (err) {
    console.error('release failed. message = ', err);
  }
}

commitModify

commitModify(callback: AsyncCallback<void>): void

Commits the modification on the file metadata to the database. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('commitModifyDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  let fileAsset = await fetchResult.getFirstObject();
  let title = userFileManager.ImageVideoKey.TITLE;
  let fileAssetTitle = fileAsset.get(title.toString());
  console.info('fileAsset Get fileAssetTitle = ', fileAssetTitle);
  fileAsset.set(title.toString(), "newTitle");
  fileAsset.commitModify((err) => {
    if (err == undefined) {
      let newFileAssetTitle = fileAsset.get(title.toString());
      console.info('fileAsset Get newFileAssetTitle = ', newFileAssetTitle);
    } else {
      console.error('commitModify failed, message =', err);
    }
  });
}

commitModify

commitModify(): Promise<void>

Commits the modification on the file metadata to the database. This API uses a promise to return the result.

Required permissions: ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('commitModifyDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  let fileAsset = await fetchResult.getFirstObject();
  let title = userFileManager.ImageVideoKey.TITLE;
  let fileAssetTitle = fileAsset.get(title.toString());
  console.info('fileAsset Get fileAssetTitle = ', fileAssetTitle);
  fileAsset.set(title.toString(), "newTitle");
  try {
    await fileAsset.commitModify();
    let newFileAssetTitle = fileAsset.get(title.toString());
    console.info('fileAsset Get newFileAssetTitle = ', newFileAssetTitle);
  } catch (err) {
    console.error('release failed. message = ', err);
  }
}

open

open(mode: string, callback: AsyncCallback<number>): void

Opens this file asset. This API uses an asynchronous callback to return the result.

NOTE
The write operations are mutually exclusive. After a write operation is complete, you must call close to release the resource.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.READ_AUDIO, ohos.permission.WRITE_IMAGEVIDEO, or ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

async function example() {
  console.info('openDemo');
   let testFileName = "testFile" + Date.now() + ".jpg";
  const fileAsset = await mgr.createPhotoAsset(testFileName);
  fileAsset.open('rw', (err, fd) => {
    if (fd != undefined) {
      console.info('File fd' + fd);
      fileAsset.close(fd);
    } else {
      console.error('File err' + err);
    }
  });
}

open

open(mode: string): Promise<number>

Opens this file asset. This API uses a promise to return the result.

NOTE
The write operations are mutually exclusive. After a write operation is complete, you must call close to release the resource.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.READ_AUDIO, ohos.permission.WRITE_IMAGEVIDEO, or ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

async function example() {
  console.info('openDemo');
  try {
    let testFileName = "testFile" + Date.now() + ".jpg";
    const fileAsset = await mgr.createPhotoAsset(testFileName);
    let fd = await fileAsset.open('rw');
    if (fd != undefined) {
      console.info('File fd' + fd);
      fileAsset.close(fd);
    } else {
      console.error(' open File fail');
    }
  } catch (err) {
    console.error('open Demo err' + err);
  }
}

close

close(fd: number, callback: AsyncCallback<void>): void

Closes this file asset. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('closeDemo');
  try {
    let predicates = new dataSharePredicates.DataSharePredicates();
    let fetchOption = {
      fetchColumns: [],
      predicates: predicates
    };
    let fetchResult = await mgr.getPhotoAssets(fetchOption);
    const fileAsset = await fetchResult.getFirstObject();
    let fd = await fileAsset.open('rw');
    console.info('file fd', fd);
    fileAsset.close(fd, (err) => {
      if (err == undefined) {
        console.info('asset close succeed.');
      } else {
        console.error('close failed, message = ' + err);
      }
    });
  } catch (err) {
    console.error('close failed, message = ' + err);
  }
}

close

close(fd: number): Promise<void>

Closes this file asset. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('closeDemo');
  try {
    let predicates = new dataSharePredicates.DataSharePredicates();
    let fetchOption = {
      fetchColumns: [],
      predicates: predicates
    };
    let fetchResult = await mgr.getPhotoAssets(fetchOption);
    const asset = await fetchResult.getFirstObject();
    let fd = await asset.open('rw');
    console.info('file fd', fd);
    await asset.close(fd);
    console.info('asset close succeed.');
  } catch (err) {
    console.error('close failed, message = ' + err);
  }
}

getThumbnail

getThumbnail(callback: AsyncCallback<image.PixelMap>): void

Obtains the thumbnail of this file asset. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.READ_IMAGEVIDEO or ohos.permission.READ_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getThumbnailDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  const asset = await fetchResult.getFirstObject();
  console.info('asset displayName = ', asset.displayName);
  asset.getThumbnail((err, pixelMap) => {
    if (err == undefined) {
      console.info('getThumbnail successful ' + pixelMap);
    } else {
      console.error('getThumbnail fail', err);
    }
  });
}

getThumbnail

getThumbnail(size: image.Size, callback: AsyncCallback<image.PixelMap>): void

Obtains the file thumbnail of the given size. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.READ_IMAGEVIDEO or ohos.permission.READ_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getThumbnailDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let size = { width: 720, height: 720 };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  const asset = await fetchResult.getFirstObject();
  console.info('asset displayName = ', asset.displayName);
  asset.getThumbnail(size, (err, pixelMap) => {
    if (err == undefined) {
      console.info('getThumbnail successful ' + pixelMap);
    } else {
      console.error('getThumbnail fail', err);
    }
  });
}

getThumbnail

getThumbnail(size?: image.Size): Promise<image.PixelMap>

Obtains the file thumbnail of the given size. This API uses a promise to return the result.

Required permissions: ohos.permission.READ_IMAGEVIDEO or ohos.permission.READ_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getThumbnailDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let size = { width: 720, height: 720 };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  const asset = await fetchResult.getFirstObject();
  console.info('asset displayName = ', asset.displayName);
  asset.getThumbnail(size).then((pixelMap) => {
    console.info('getThumbnail successful ' + pixelMap);
  }).catch((err) => {
    console.error('getThumbnail fail' + err);
  });
}

favorite

favorite(isFavorite: boolean, callback: AsyncCallback<void>): void

Favorites or unfavorites this file asset. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('favoriteDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  const asset = await fetchResult.getFirstObject();
  asset.favorite(true, (err) => {
    if (err == undefined) {
      console.info("favorite successfully");
    } else {
      console.error("favorite failed with error:" + err);
    }
  });
}

favorite

favorite(isFavorite: boolean): Promise<void>

Favorites or unfavorites this file asset. This API uses a promise to return the result.

Required permissions: ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('favoriteDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  const asset = await fetchResult.getFirstObject();
  asset.favorite(true).then(function () {
    console.info("favorite successfully");
  }).catch(function (err) {
    console.error("favorite failed with error:" + err);
  });
}

FetchResult

Provides APIs to manage the file retrieval result.

getCount

getCount(): number

Obtains the total number of files in the result set.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getCountDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  const fetchCount = fetchResult.getCount();
  console.info('fetchCount = ', fetchCount);
}

isAfterLast

isAfterLast(): boolean

Checks whether the cursor is in the last row of the result set.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  const fetchCount = fetchResult.getCount();
  console.info('count:' + fetchCount);
  let fileAsset = await fetchResult.getLastObject();
  if (!fetchResult.isAfterLast()) {
    console.info('fileAsset isAfterLast displayName = ', fileAsset.displayName);
  } else {
    console.info('fileAsset  not isAfterLast ');
  }
}

close

close(): void

Releases and invalidates this FetchFileResult instance. After this instance is released, the APIs in this instance cannot be invoked.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('fetchResultCloseDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  try {
    let fetchResult = await mgr.getPhotoAssets(fetchOption);
    await fetchResult.close();
    console.info('close succeed.');
  } catch (err) {
    console.error('close fail. message = ' + err);
  }
}

getFirstObject

getFirstObject(callback: AsyncCallback<T>): void

Obtains the first file asset in the result set. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getFirstObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  fetchResult.getFirstObject((err, fileAsset) => {
    if (fileAsset != undefined) {
      console.info('fileAsset displayName: ', fileAsset.displayName);
    } else {
      console.error("fileAsset failed with err:" + err);
    }
  });
}

getFirstObject

getFirstObject(): Promise<T>

Obtains the first file asset in the result set. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getFirstObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  let fileAsset = await fetchResult.getFirstObject();
  console.info('fileAsset displayName: ', fileAsset.displayName);
}

getNextObject

getNextObject(callback: AsyncCallback<T>): void

Obtains the next file asset in the result set. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getNextObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  await fetchResult.getFirstObject();
  if (fetchResult.isAfterLast()) {
    fetchResult.getNextObject((err, fileAsset) => {
      if (fileAsset != undefined) {
        console.info('fileAsset displayName: ', fileAsset.displayName);
      } else {
        console.error("fileAsset failed with err: " + err);
      }
    });
  }
}

getNextObject

getNextObject(): Promise<T>

Obtains the next file asset in the result set. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getNextObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  await fetchResult.getFirstObject();
  if (fetchResult.isAfterLast()) {
    let fileAsset = await fetchResult.getNextObject();
    console.info('fileAsset displayName: ', fileAsset.displayName);
  }
}

getLastObject

getLastObject(callback: AsyncCallback<T>): void

Obtains the last file asset in the result set. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getLastObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  fetchResult.getLastObject((err, fileAsset) => {
    if (fileAsset != undefined) {
      console.info('fileAsset displayName: ', fileAsset.displayName);
    } else {
      console.error("fileAsset failed with err: " + err);
    }
  });
}

getLastObject

getLastObject(): Promise<T>

Obtains the last file asset in the result set. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getLastObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  let fileAsset = await fetchResult.getLastObject();
  console.info('fileAsset displayName: ', fileAsset.displayName);
}

getPositionObject

getPositionObject(index: number, callback: AsyncCallback<T>): void

Obtains a file asset with the specified index in the result set. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getPositionObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  fetchResult.getPositionObject(0, (err, fileAsset) => {
    if (fileAsset != undefined) {
      console.info('fileAsset displayName: ', fileAsset.displayName);
    } else {
      console.error("fileAsset failed with err: " + err);
    }
  });
}

getPositionObject

getPositionObject(index: number): Promise<T>

Obtains a file asset with the specified index in the result set. This API uses a promise to return the result.

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('getPositionObjectDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  let fetchResult = await mgr.getPhotoAssets(fetchOption);
  let fileAsset = await fetchResult.getPositionObject(0);
  console.info('fileAsset displayName: ', fileAsset.displayName);
}

Album

Provides APIs to manage albums.

Attributes

System capability: SystemCapability.FileManagement.UserFileManager.Core

getPhotoAssets

getPhotoAssets(options: FetchOptions, callback: AsyncCallback<FetchResult<FileAsset>>): void;

Obtains image and video assets. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.READ_IMAGEVIDEO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('albumGetFileAssetsDemoCallback');

  let predicates = new dataSharePredicates.DataSharePredicates();
  let albumFetchOptions = {
    predicates: predicates
  };
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const albumList = await mgr.getPhotoAlbums(albumFetchOptions);
  const album = await albumList.getFirstObject();
  album.getPhotoAssets(fetchOption, (err, albumFetchResult) => {
    if (albumFetchResult != undefined) {
      console.info("album getPhotoAssets successfully, getCount: " + albumFetchResult.getCount());
    } else {
      console.error("album getPhotoAssets failed with error: " + err);
    }
  });
}

getPhotoAssets

getPhotoAssets(options: FetchOptions): Promise<FetchResult<FileAsset>>;

Obtains image and video assets. This API uses a promise to return the result.

Required permissions: ohos.permission.READ_IMAGEVIDEO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('albumGetFileAssetsDemoPromise');

  let predicates = new dataSharePredicates.DataSharePredicates();
  let albumFetchOptions = {
    predicates: predicates
  };
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const albumList = await mgr.getPhotoAlbums(albumFetchOptions);
  const album = await albumList.getFirstObject();
  album.getPhotoAssets(fetchOption).then((albumFetchResult) => {
    console.info("album getFileAssets successfully, getCount: " + albumFetchResult.getCount());
  }).catch((err) => {
    console.error("album getFileAssets failed with error: " + err);
  });
}

commitModify

commitModify(callback: AsyncCallback<void>): void;

Commits the modification on the album attributes to the database. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.WRITE_IMAGEVIDEO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('albumCommitModifyDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let albumFetchOptions = {
    predicates: predicates
  };
  const albumList = await mgr.getPhotoAlbums(albumFetchOptions);
  const album = await albumList.getFirstObject();
  album.albumName = 'hello';
  album.commitModify((err) => {
    if (err != undefined) {
      console.error("commitModify failed with error: " + err);
    } else {
      console.info("commitModify successfully");
    }
  });
}

commitModify

commitModify(): Promise<void>;

Commits the modification on the album attributes to the database. This API uses a promise to return the result.

Required permissions: ohos.permission.WRITE_IMAGEVIDEO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('albumCommitModifyDemo');
  let predicates = new dataSharePredicates.DataSharePredicates();
  let albumFetchOptions = {
    predicates: predicates
  };
  try {
    var albumList = await mgr.getPhotoAlbums(albumFetchOptions);
  } catch (err) {
    console.error('getPhotoAlbums failed. message = ', err);
  }
  const album = await albumList.getFirstObject();
  album.albumName = 'hello';
  album.commitModify().then(() => {
    console.info("commitModify successfully");
  }).catch((err) => {
    console.error("commitModify failed with error: " + err);
  });
}

PrivateAlbum

Provides APIs for managing the system albums.

Attributes

System capability: SystemCapability.FileManagement.UserFileManager.Core

getPhotoAssets

getPhotoAssets(options: FetchOptions, callback: AsyncCallback<FetchResult<FileAsset>>): void;

Obtains image and video assets from a system album. This API uses an asynchronous callback to return the result.

Required permissions: ohos.permission.READ_IMAGEVIDEO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('privateAlbumGetFileAssetsDemoCallback');
  let albumList = await mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH);
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const trashAlbum = await albumList.getFirstObject();
  trashAlbum.getPhotoAssets(fetchOption, (err, fetchResult) => {
    if (fetchResult != undefined) {
      let count = fetchResult.getCount();
      console.info('fetchResult.count = ', count);
    } else {
      console.error('getFileAssets failed, message = ', err);
    }
  });
}

getPhotoAssets

getPhotoAssets(options: FetchOptions): Promise<FetchResult<FileAsset>>;

Obtains image and video assets from a system album. This API uses a promise to return the result.

Required permissions: ohos.permission.READ_IMAGEVIDEO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('privateAlbumGetFileAssetsDemoPromise');
  let albumList = await mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH);
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const trashAlbum = await albumList.getFirstObject();
  let fetchResult = await trashAlbum.getPhotoAssets(fetchOption);
  let count = fetchResult.getCount();
  console.info('fetchResult.count = ', count);
}

delete

delete(uri: string, callback: AsyncCallback<void>): void;

Deletes files from a system album.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.READ_AUDIO, and ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('privateAlbumDeleteCallback');
  let albumList = await mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH);
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const trashAlbum = await albumList.getFirstObject();
  let fetchResult = await trashAlbum.getPhotoAssets(fetchOption);
  const fileAsset = await fetchResult.getFirstObject();
  let deleteFileUri = fileAsset.uri;
  trashAlbum.delete(deleteFileUri, (err) => {
    if (err != undefined) {
      console.error('trashAlbum.delete failed, message = ', err);
    } else {
      console.info('trashAlbum.delete successfully');
    }
  });
}

delete

delete(uri: string): Promise<void>;

Deletes files from a system album.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.READ_AUDIO, and ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('privateAlbumDeleteDemoPromise');
  let albumList = await mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH);
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const trashAlbum = await albumList.getFirstObject();
  let fetchResult = await trashAlbum.getPhotoAssets(fetchOption);
  const fileAsset = await fetchResult.getFirstObject();
  let deleteFileUri = fileAsset.uri;
  trashAlbum.delete(deleteFileUri).then(() => {
    console.info('trashAlbum.delete successfully');
  }).catch((err) => {
    console.error('trashAlbum.delete failed, message = ', err);
  });
}   

recover

recover(uri: string, callback: AsyncCallback<void>): void;

Recovers files in a system album.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.READ_AUDIO, and ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('privateAlbumRecoverDemoCallback');
  let albumList = await mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH);
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const trashAlbum = await albumList.getFirstObject();
  let fetchResult = await trashAlbum.getPhotoAssets(fetchOption);
  const fileAsset = await fetchResult.getFirstObject();
  let recoverFileUri = fileAsset.uri;
  trashAlbum.recover(recoverFileUri, (err) => {
    if (err != undefined) {
      console.error('trashAlbum.recover failed, message = ', err);
    } else {
      console.info('trashAlbum.recover successfully');
    }
  });
}

recover

recover(uri: string): Promise<void>;

Recovers files in a system album.

Required permissions: ohos.permission.READ_IMAGEVIDEO, ohos.permission.WRITE_IMAGEVIDEO or ohos.permission.READ_AUDIO, and ohos.permission.WRITE_AUDIO

System capability: SystemCapability.FileManagement.UserFileManager.Core

Parameters

Return value

Example

import dataSharePredicates from '@ohos.data.dataSharePredicates';

async function example() {
  console.info('privateAlbumRecoverDemoPromise');
  let albumList = await mgr.getPrivateAlbum(userFileManager.PrivateAlbumType.TYPE_TRASH);
  let predicates = new dataSharePredicates.DataSharePredicates();
  let fetchOption = {
    fetchColumns: [],
    predicates: predicates
  };
  const trashAlbum = await albumList.getFirstObject();
  let fetchResult = await trashAlbum.getPhotoAssets(fetchOption);
  const fileAsset = await fetchResult.getFirstObject();
  let recoverFileUri = fileAsset.uri;
  trashAlbum.recover(recoverFileUri).then(() => {
    console.info('trashAlbum.recover successfully');
  }).catch((err) => {
    console.error('trashAlbum.recover failed, message = ', err);
  });
}

MemberType

Enumerates the member types.

System capability: SystemCapability.FileManagement.UserFileManager.Core

ChangeEvent

Enumerates the type of changes to observe.

System capability: SystemCapability.FileManagement.UserFileManager.Core

PeerInfo

Defines information about a registered device.

System capability: SystemCapability.FileManagement.UserFileManager.DistributedCore

FileType

Enumerates media file types.

System capability: SystemCapability.FileManagement.UserFileManager.Core

PrivateAlbumType

Enumerates the system album types.

System capability: SystemCapability.FileManagement.UserFileManager.Core

AudioKey

Defines the key information about an audio file.

System capability: SystemCapability.FileManagement.UserFileManager.Core

ImageVideoKey

Defines the key information about an image or video file.

System capability: SystemCapability.FileManagement.UserFileManager.Core

AlbumKey

Defines the key album information.

System capability: SystemCapability.FileManagement.UserFileManager.Core

FetchOptions

Defines the options for fetching media files.

System capability: SystemCapability.FileManagement.UserFileManager.Core

AlbumFetchOptions

Defines the options for fetching an album.

System capability: SystemCapability.FileManagement.UserFileManager.Core