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MediaMetadata

public final class MediaMetadata
extends Object implements Parcelable

java.lang.Object
   ↳ android.media.MediaMetadata

Contains metadata about an item, such as the title, artist, etc.

Summary

Nested classes

class MediaMetadata.Builder

Use to build MediaMetadata objects. 

Constants

String METADATA_KEY_ALBUM

The album title for the media.

String METADATA_KEY_ALBUM_ART

The artwork for the album of the media's original source as a Bitmap.

String METADATA_KEY_ALBUM_ARTIST

The artist for the album of the media's original source.

String METADATA_KEY_ALBUM_ART_URI

The artwork for the album of the media's original source as a Uri formatted String.

String METADATA_KEY_ART

The artwork for the media as a Bitmap.

String METADATA_KEY_ARTIST

The artist of the media.

String METADATA_KEY_ART_URI

The artwork for the media as a Uri formatted String.

String METADATA_KEY_AUTHOR

The author of the media.

String METADATA_KEY_BT_FOLDER_TYPE

The bluetooth folder type of the media specified in the section 6.10.2.2 of the Bluetooth AVRCP 1.5.

String METADATA_KEY_COMPILATION

The compilation status of the media.

String METADATA_KEY_COMPOSER

The composer of the media.

String METADATA_KEY_DATE

The date the media was created or published.

String METADATA_KEY_DISC_NUMBER

The disc number for the media's original source.

String METADATA_KEY_DISPLAY_DESCRIPTION

A description that is suitable for display to the user.

String METADATA_KEY_DISPLAY_ICON

An icon or thumbnail that is suitable for display to the user.

String METADATA_KEY_DISPLAY_ICON_URI

A Uri formatted String for an icon or thumbnail that is suitable for display to the user.

String METADATA_KEY_DISPLAY_SUBTITLE

A subtitle that is suitable for display to the user.

String METADATA_KEY_DISPLAY_TITLE

A title that is suitable for display to the user.

String METADATA_KEY_DURATION

The duration of the media in ms.

String METADATA_KEY_GENRE

The genre of the media.

String METADATA_KEY_MEDIA_ID

A String key for identifying the content.

String METADATA_KEY_MEDIA_URI

A Uri formatted String representing the content.

String METADATA_KEY_NUM_TRACKS

The number of tracks in the media's original source.

String METADATA_KEY_RATING

The overall rating for the media.

String METADATA_KEY_TITLE

The title of the media.

String METADATA_KEY_TRACK_NUMBER

The track number for the media.

String METADATA_KEY_USER_RATING

The user's rating for the media.

String METADATA_KEY_WRITER

The writer of the media.

String METADATA_KEY_YEAR

The year the media was created or published as a long.

Inherited constants

Fields

public static final Creator<MediaMetadata> CREATOR

Public methods

boolean containsKey(String key)

Returns true if the given key is contained in the metadata

int describeContents()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.

boolean equals(Object o)

Compares the contents of this object to another MediaMetadata object.

Bitmap getBitmap(String key)

Returns a Bitmap for the given key or null if no bitmap exists for the given key.

int getBitmapDimensionLimit()

Gets the width/height limit (in pixels) for the bitmaps when this metadata was created.

MediaDescription getDescription()

Returns a simple description of this metadata for display purposes.

long getLong(String key)

Returns the value associated with the given key, or 0L if no long exists for the given key.

Rating getRating(String key)

Returns a Rating for the given key or null if no rating exists for the given key.

String getString(String key)

Returns the text value associated with the given key as a String, or null if no mapping of the desired type exists for the given key or a null value is explicitly associated with the key.

CharSequence getText(String key)

Returns the value associated with the given key, or null if no mapping of the desired type exists for the given key or a null value is explicitly associated with the key.

int hashCode()

Returns a hash code value for the object.

Set<String> keySet()

Returns a Set containing the Strings used as keys in this metadata.

int size()

Returns the number of fields in this metadata.

void writeToParcel(Parcel dest, int flags)

Flatten this object in to a Parcel.

Inherited methods

Constants

METADATA_KEY_ALBUM

public static final String METADATA_KEY_ALBUM

The album title for the media.

Constant Value: "android.media.metadata.ALBUM"

METADATA_KEY_ALBUM_ART

public static final String METADATA_KEY_ALBUM_ART

The artwork for the album of the media's original source as a Bitmap.

The artwork should be relatively small and may be scaled down by the system if it is too large. For higher resolution artwork METADATA_KEY_ALBUM_ART_URI should be used instead.

Constant Value: "android.media.metadata.ALBUM_ART"

METADATA_KEY_ALBUM_ARTIST

public static final String METADATA_KEY_ALBUM_ARTIST

The artist for the album of the media's original source.

Constant Value: "android.media.metadata.ALBUM_ARTIST"

METADATA_KEY_ALBUM_ART_URI

public static final String METADATA_KEY_ALBUM_ART_URI

The artwork for the album of the media's original source as a Uri formatted String. The artwork can be loaded using a combination of ContentResolver#openInputStream and BitmapFactory#decodeStream.

For the best results, Uris should use the content:// style and support ContentResolver#EXTRA_SIZE for retrieving scaled artwork through ContentResolver#openTypedAssetFileDescriptor(Uri, String, Bundle).

Constant Value: "android.media.metadata.ALBUM_ART_URI"

METADATA_KEY_ART

public static final String METADATA_KEY_ART

The artwork for the media as a Bitmap.

The artwork should be relatively small and may be scaled down by the system if it is too large. For higher resolution artwork METADATA_KEY_ART_URI should be used instead.

Constant Value: "android.media.metadata.ART"

METADATA_KEY_ARTIST

public static final String METADATA_KEY_ARTIST

The artist of the media.

Constant Value: "android.media.metadata.ARTIST"

METADATA_KEY_ART_URI

public static final String METADATA_KEY_ART_URI

The artwork for the media as a Uri formatted String. The artwork can be loaded using a combination of ContentResolver#openInputStream and BitmapFactory#decodeStream.

For the best results, Uris should use the content:// style and support ContentResolver#EXTRA_SIZE for retrieving scaled artwork through ContentResolver#openTypedAssetFileDescriptor(Uri, String, Bundle).

Constant Value: "android.media.metadata.ART_URI"

METADATA_KEY_AUTHOR

public static final String METADATA_KEY_AUTHOR

The author of the media.

Constant Value: "android.media.metadata.AUTHOR"

METADATA_KEY_BT_FOLDER_TYPE

public static final String METADATA_KEY_BT_FOLDER_TYPE

The bluetooth folder type of the media specified in the section 6.10.2.2 of the Bluetooth AVRCP 1.5. It should be one of the following:

Constant Value: "android.media.metadata.BT_FOLDER_TYPE"

METADATA_KEY_COMPILATION

public static final String METADATA_KEY_COMPILATION

The compilation status of the media.

Constant Value: "android.media.metadata.COMPILATION"

METADATA_KEY_COMPOSER

public static final String METADATA_KEY_COMPOSER

The composer of the media.

Constant Value: "android.media.metadata.COMPOSER"

METADATA_KEY_DATE

public static final String METADATA_KEY_DATE

The date the media was created or published. The format is unspecified but RFC 3339 is recommended.

Constant Value: "android.media.metadata.DATE"

METADATA_KEY_DISC_NUMBER

public static final String METADATA_KEY_DISC_NUMBER

The disc number for the media's original source.

Constant Value: "android.media.metadata.DISC_NUMBER"

METADATA_KEY_DISPLAY_DESCRIPTION

public static final String METADATA_KEY_DISPLAY_DESCRIPTION

A description that is suitable for display to the user. When displaying more information for media described by this metadata this should be preferred to other fields if present.

Constant Value: "android.media.metadata.DISPLAY_DESCRIPTION"

METADATA_KEY_DISPLAY_ICON

public static final String METADATA_KEY_DISPLAY_ICON

An icon or thumbnail that is suitable for display to the user. When displaying an icon for media described by this metadata this should be preferred to other fields if present. This must be a Bitmap.

The icon should be relatively small and may be scaled down by the system if it is too large. For higher resolution artwork METADATA_KEY_DISPLAY_ICON_URI should be used instead.

Constant Value: "android.media.metadata.DISPLAY_ICON"

METADATA_KEY_DISPLAY_ICON_URI

public static final String METADATA_KEY_DISPLAY_ICON_URI

A Uri formatted String for an icon or thumbnail that is suitable for display to the user. When displaying more information for media described by this metadata the display description should be preferred to other fields when present. The icon can be loaded using a combination of ContentResolver#openInputStream and BitmapFactory#decodeStream.

For the best results, Uris should use the content:// style and support ContentResolver#EXTRA_SIZE for retrieving scaled artwork through ContentResolver#openTypedAssetFileDescriptor(Uri, String, Bundle).

Constant Value: "android.media.metadata.DISPLAY_ICON_URI"

METADATA_KEY_DISPLAY_SUBTITLE

public static final String METADATA_KEY_DISPLAY_SUBTITLE

A subtitle that is suitable for display to the user. When displaying a second line for media described by this metadata this should be preferred to other fields if present.

Constant Value: "android.media.metadata.DISPLAY_SUBTITLE"

METADATA_KEY_DISPLAY_TITLE

public static final String METADATA_KEY_DISPLAY_TITLE

A title that is suitable for display to the user. This will generally be the same as METADATA_KEY_TITLE but may differ for some formats. When displaying media described by this metadata this should be preferred if present.

Constant Value: "android.media.metadata.DISPLAY_TITLE"

METADATA_KEY_DURATION

public static final String METADATA_KEY_DURATION

The duration of the media in ms. A negative duration indicates that the duration is unknown (or infinite).

Constant Value: "android.media.metadata.DURATION"

METADATA_KEY_GENRE

public static final String METADATA_KEY_GENRE

The genre of the media.

Constant Value: "android.media.metadata.GENRE"

METADATA_KEY_MEDIA_ID

public static final String METADATA_KEY_MEDIA_ID

A String key for identifying the content. This value is specific to the service providing the content. If used, this should be a persistent unique key for the underlying content. It may be used with MediaController.TransportControls#playFromMediaId(String, Bundle) to initiate playback when provided by a MediaBrowser connected to the same app.

Constant Value: "android.media.metadata.MEDIA_ID"

METADATA_KEY_MEDIA_URI

public static final String METADATA_KEY_MEDIA_URI

A Uri formatted String representing the content. This value is specific to the service providing the content. It may be used with MediaController.TransportControls#playFromUri(Uri, Bundle) to initiate playback when provided by a MediaBrowser connected to the same app.

Constant Value: "android.media.metadata.MEDIA_URI"

METADATA_KEY_NUM_TRACKS

public static final String METADATA_KEY_NUM_TRACKS

The number of tracks in the media's original source.

Constant Value: "android.media.metadata.NUM_TRACKS"

METADATA_KEY_RATING

public static final String METADATA_KEY_RATING

The overall rating for the media.

See also:

Constant Value: "android.media.metadata.RATING"

METADATA_KEY_TITLE

public static final String METADATA_KEY_TITLE

The title of the media.

Constant Value: "android.media.metadata.TITLE"

METADATA_KEY_TRACK_NUMBER

public static final String METADATA_KEY_TRACK_NUMBER

The track number for the media.

Constant Value: "android.media.metadata.TRACK_NUMBER"

METADATA_KEY_USER_RATING

public static final String METADATA_KEY_USER_RATING

The user's rating for the media.

See also:

Constant Value: "android.media.metadata.USER_RATING"

METADATA_KEY_WRITER

public static final String METADATA_KEY_WRITER

The writer of the media.

Constant Value: "android.media.metadata.WRITER"

METADATA_KEY_YEAR

public static final String METADATA_KEY_YEAR

The year the media was created or published as a long.

Constant Value: "android.media.metadata.YEAR"

Fields

CREATOR

public static final Creator<MediaMetadata> CREATOR

Public methods

containsKey

public boolean containsKey (String key)

Returns true if the given key is contained in the metadata

Parameters
key String: a String key
Returns
boolean true if the key exists in this metadata, false otherwise

describeContents

public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
int a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either 0 or CONTENTS_FILE_DESCRIPTOR

equals

public boolean equals (Object o)

Compares the contents of this object to another MediaMetadata object. It does not compare Bitmaps and Ratings as the media player can choose to forgo these fields depending on how you retrieve the MediaMetadata.

Parameters
o Object: The Metadata object to compare this object against
Returns
boolean Whether or not the two objects have matching fields (excluding Bitmaps and Ratings)

getBitmap

public Bitmap getBitmap (String key)

Returns a Bitmap for the given key or null if no bitmap exists for the given key.

Parameters
key String: The key the value is stored under Value is METADATA_KEY_ART, METADATA_KEY_ALBUM_ART, or METADATA_KEY_DISPLAY_ICON
Returns
Bitmap A Bitmap or null

getBitmapDimensionLimit

public int getBitmapDimensionLimit ()

Gets the width/height limit (in pixels) for the bitmaps when this metadata was created. This method always returns a positive value.

If it returns Integer#MAX_VALUE, then no scaling down was applied to the bitmaps when this metadata was created.

If it returns another positive value, then all the bitmaps in this metadata has width/height not greater than this limit. Bitmaps may have been scaled down according to the limit.

Returns
int Value is 1 or greater

See also:

getDescription

public MediaDescription getDescription ()

Returns a simple description of this metadata for display purposes.

Returns
MediaDescription A simple description of this metadata. This value cannot be null.

getLong

public long getLong (String key)

Returns the value associated with the given key, or 0L if no long exists for the given key.

Parameters
key String: The key the value is stored under Value is METADATA_KEY_DURATION, METADATA_KEY_YEAR, METADATA_KEY_TRACK_NUMBER, METADATA_KEY_NUM_TRACKS, METADATA_KEY_DISC_NUMBER, or METADATA_KEY_BT_FOLDER_TYPE
Returns
long a long value

getRating

public Rating getRating (String key)

Returns a Rating for the given key or null if no rating exists for the given key.

Parameters
key String: The key the value is stored under Value is METADATA_KEY_USER_RATING, or METADATA_KEY_RATING
Returns
Rating A Rating or null

getString

public String getString (String key)

Returns the text value associated with the given key as a String, or null if no mapping of the desired type exists for the given key or a null value is explicitly associated with the key. This is equivalent to calling getText().toString() if the value is not null.

Parameters
key String: The key the value is stored under Value is METADATA_KEY_TITLE, METADATA_KEY_ARTIST, METADATA_KEY_ALBUM, METADATA_KEY_AUTHOR, METADATA_KEY_WRITER, METADATA_KEY_COMPOSER, METADATA_KEY_COMPILATION, METADATA_KEY_DATE, METADATA_KEY_GENRE, METADATA_KEY_ALBUM_ARTIST, METADATA_KEY_ART_URI, METADATA_KEY_ALBUM_ART_URI, METADATA_KEY_DISPLAY_TITLE, METADATA_KEY_DISPLAY_SUBTITLE, METADATA_KEY_DISPLAY_DESCRIPTION, METADATA_KEY_DISPLAY_ICON_URI, METADATA_KEY_MEDIA_ID, or METADATA_KEY_MEDIA_URI
Returns
String a String value, or null

getText

public CharSequence getText (String key)

Returns the value associated with the given key, or null if no mapping of the desired type exists for the given key or a null value is explicitly associated with the key.

Parameters
key String: The key the value is stored under Value is METADATA_KEY_TITLE, METADATA_KEY_ARTIST, METADATA_KEY_ALBUM, METADATA_KEY_AUTHOR, METADATA_KEY_WRITER, METADATA_KEY_COMPOSER, METADATA_KEY_COMPILATION, METADATA_KEY_DATE, METADATA_KEY_GENRE, METADATA_KEY_ALBUM_ARTIST, METADATA_KEY_ART_URI, METADATA_KEY_ALBUM_ART_URI, METADATA_KEY_DISPLAY_TITLE, METADATA_KEY_DISPLAY_SUBTITLE, METADATA_KEY_DISPLAY_DESCRIPTION, METADATA_KEY_DISPLAY_ICON_URI, METADATA_KEY_MEDIA_ID, or METADATA_KEY_MEDIA_URI
Returns
CharSequence a CharSequence value, or null

hashCode

public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
int a hash code value for this object.

keySet

public Set<String> keySet ()

Returns a Set containing the Strings used as keys in this metadata.

Returns
Set<String> a Set of String keys

size

public int size ()

Returns the number of fields in this metadata.

Returns
int The number of fields in the metadata.

writeToParcel

public void writeToParcel (Parcel dest, 
                int flags)

Flatten this object in to a Parcel.

Parameters
dest Parcel: The Parcel in which the object should be written.
flags int: Additional flags about how the object should be written. May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES
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