Knowledge about the audio library in Android

Android automatically scans files in external storage (SD card), obtains files of the audio type, analyzes the files, and stores the information data in mediastore. audio. in the audiocolumns table, the table structure is as follows:

The fields include:

Constants
String	Album	The album the audio file is from, if any Type: Text
String	Album_id	The ID of the album the audio file is from, if any Type: INTEGER (long)
String	Album_key	A non human readable key calculated from the album, used for searching, sorting and grouping Type: Text
String	Artist	The artist who created the audio file, if any Type: Text
String	Artist_id	The ID of the artist who created the audio file, if any Type: INTEGER (long)
String	Artist_key	A non human readable key calculated from the artist, used for searching, sorting and grouping Type: Text
String	Bookmark	The position, in MS, playback was at when playback for this file was last stopped.
String	Composer	The composer of the audio file, if any Type: Text
String	Duration	The duration of the audio file in MS Type: INTEGER (long)
String	Is_alarm	Non-zero if the audio file may be an alarm Type: INTEGER (Boolean)
String	Is_music	Non-zero if the audio file is music Type: INTEGER (Boolean)
String	Is_notification	Non-zero if the audio file may be a notification sound Type: INTEGER (Boolean)
String	Is_podcast	Non-zero if the audio file is a podcast Type: INTEGER (Boolean)
String	Is_ringtone	Non-zero if the audio file may be a ringtone Type: INTEGER (Boolean)
String	Title_key	A non human readable key calculated from the title, used for searching, sorting and grouping Type: Text
String	Track	The track number of this song on the album, if any.
String	Year	The year the audio file was recorded, if any Type: integer

[Collapse] Inherited Constants
From Interfaceandroid. provider. basecolumns String _ Count The Count of rows in a directory. String _ Id The unique ID for a row.
From Interfaceandroid. provider. mediastore. mediacolumns String Data The data stream for the file Type: Data Stream String Date_added The time the file was added to the media provider units are seconds since 1970. String Date_modified The time the file was last modified units are seconds since 1970. String Display_name The display name of the file Type: Text String Mime_type The MIME type of the file Type: Text String Size The size of the file in bytes Type: INTEGER (long) String Title The title of the content Type: Text

Mediastore. Audio. Media

Describes the URI of the mobile phone and the SD card audio file.

Fields
Public static final Uri	External_content_uri	The content: // style URI for the "primary" external storage volume.
Public static final Uri	Internal_content_uri	The content: // style URI for the internal storage.