1# Introduction to Media Library Kit
2
3Media Library Kit provides the capabilities of managing albums and media files, including images and videos, to enable your application to quickly display images and play back videos.
4
5## Available Capabilities
6
7With Media Library Kit, you can manage albums and media files, including creating and accessing albums and modifying media assets in albums.
8
9The following capabilities are opened to all applications:
10
11- [Selecting Media Assets Using Picker](photoAccessHelper-photoviewpicker.md)
12- [Creating a Media Asset Using \<SaveButton>](photoAccessHelper-savebutton.md)
13
14The following capabilities are restrictedly opened to third-party applications:
15
16> **NOTE**
17>
18> To use the restricted open capabilities, the application must have the ohos.permission.READ_IMAGEVIDEO and ohos.permission.WRITE_IMAGEVIDEO permissions. For details, see [Requesting Permissions](photoAccessHelper-preparation.md#requesting-permissions). <!--RP1-->The following permissions are opened to third-party applications with certain restrictions.<!--RP1End-->
19
20- [Media asset management](photoAccessHelper-resource-guidelines.md), including:
21  - Obtaining media assets (images and videos)
22  - Obtaining image and video thumbnails
23  - Renaming a media asset
24- [User album management](photoAccessHelper-userAlbum-guidelines.md), including:
25  - Obtaining a user album
26  - Renaming a user album
27  - Adding images and videos to a user album.
28  - Obtaining images and videos from a user album
29  - Removing images and videos from a user album
30- [Management of system albums](photoAccessHelper-systemAlbum-guidelines.md), including:
31  - Favorites
32  - Video album
33- [Change notifications of images, videos, and albums](photoAccessHelper-notify-guidelines.md), including:
34  - Registering a listener for the specified URI
35  - Unregistering a listener for the specified URI
36
37<!--Del-->
38The following capabilities are opened to system applications:
39
40- Media asset operations, including:
41  - Creating a media asset
42  - Moving a media asset to the trash
43  - Deleting a media asset permanently
44
45- Album-related operations, including:
46  - Creating a user album
47  - Deleting a user album
48  - Hiding an album
49  - Favoriting and unfavoriting an album
50  - Using the Screenshots album
51<!--DelEnd-->
52
53## Features
54
55- Simple and efficient development thanks to object-based API design.
56- Integrated device-cloud access management.
57- Precise security control and automatic authorization with Pickers and security component \<**SaveButton**>.
58- Intelligent format conversion completed at the framework layer in a unified manner.
59
60## Working Principles
61
62The media library receives requests for obtaining or changing media assets from users, verifies the request validity and permissions, interacts with the database if the verification is successful, and returns the result.
63