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MediaBrowser

public final class MediaBrowser
extends Object

java.lang.Object
   ↳ android.media.browse.MediaBrowser


Browses media content offered by a link MediaBrowserService.

This object is not thread-safe. All calls should happen on the thread on which the browser was constructed.

Standard Extra Data

These are the current standard fields that can be used as extra data via subscribe(String, Bundle, SubscriptionCallback), unsubscribe(String, SubscriptionCallback), and onChildrenLoaded(String, List, Bundle).

Summary

Nested classes

class MediaBrowser.ConnectionCallback

Callbacks for connection related events. 

class MediaBrowser.ItemCallback

Callback for receiving the result of getItem(String, MediaBrowser.ItemCallback)

class MediaBrowser.MediaItem

A class with information on a single media item for use in browsing/searching media. 

class MediaBrowser.SubscriptionCallback

Callbacks for subscription related events. 

Constants

String EXTRA_PAGE

Used as an int extra field to denote the page number to subscribe.

String EXTRA_PAGE_SIZE

Used as an int extra field to denote the number of media items in a page.

Public constructors

MediaBrowser(Context context, ComponentName serviceComponent, MediaBrowser.ConnectionCallback callback, Bundle rootHints)

Creates a media browser for the specified media browser service.

Public methods

void connect()

Connects to the media browser service.

void disconnect()

Disconnects from the media browser service.

Bundle getExtras()

Gets any extras for the media service.

void getItem(String mediaId, MediaBrowser.ItemCallback cb)

Retrieves a specific MediaBrowser.MediaItem from the connected service.

String getRoot()

Gets the root id.

ComponentName getServiceComponent()

Gets the service component that the media browser is connected to.

MediaSession.Token getSessionToken()

Gets the media session token associated with the media browser.

boolean isConnected()

Returns whether the browser is connected to the service.

void subscribe(String parentId, Bundle options, MediaBrowser.SubscriptionCallback callback)

Queries with service-specific arguments for information about the media items that are contained within the specified id and subscribes to receive updates when they change.

void subscribe(String parentId, MediaBrowser.SubscriptionCallback callback)

Queries for information about the media items that are contained within the specified id and subscribes to receive updates when they change.

void unsubscribe(String parentId)

Unsubscribes for changes to the children of the specified media id.

void unsubscribe(String parentId, MediaBrowser.SubscriptionCallback callback)

Unsubscribes for changes to the children of the specified media id through a callback.

Inherited methods

From class java.lang.Object

Constants

EXTRA_PAGE

added in API level 24
String EXTRA_PAGE

Used as an int extra field to denote the page number to subscribe. The value of EXTRA_PAGE should be greater than or equal to 0.

See also:

Constant Value: "android.media.browse.extra.PAGE"

EXTRA_PAGE_SIZE

added in API level 24
String EXTRA_PAGE_SIZE

Used as an int extra field to denote the number of media items in a page. The value of EXTRA_PAGE_SIZE should be greater than or equal to 1.

See also:

Constant Value: "android.media.browse.extra.PAGE_SIZE"

Public constructors

MediaBrowser

added in API level 21
MediaBrowser (Context context, 
                ComponentName serviceComponent, 
                MediaBrowser.ConnectionCallback callback, 
                Bundle rootHints)

Creates a media browser for the specified media browser service.

Parameters
context Context: The context.

serviceComponent ComponentName: The component name of the media browser service.

callback MediaBrowser.ConnectionCallback: The connection callback.

rootHints Bundle: An optional bundle of service-specific arguments to send to the media browser service when connecting and retrieving the root id for browsing, or null if none. The contents of this bundle may affect the information returned when browsing.

See also:

Public methods

connect

added in API level 21
void connect ()

Connects to the media browser service.

The connection callback specified in the constructor will be invoked when the connection completes or fails.

disconnect

added in API level 21
void disconnect ()

Disconnects from the media browser service. After this, no more callbacks will be received.

getExtras

added in API level 21
Bundle getExtras ()

Gets any extras for the media service.

Returns
Bundle

This value may be null.

Throws
IllegalStateException if not connected.

getItem

added in API level 23
void getItem (String mediaId, 
                MediaBrowser.ItemCallback cb)

Retrieves a specific MediaBrowser.MediaItem from the connected service. Not all services may support this, so falling back to subscribing to the parent's id should be used when unavailable.

Parameters
mediaId String: The id of the item to retrieve.

This value must never be null.

cb MediaBrowser.ItemCallback: The callback to receive the result on.

This value must never be null.

getRoot

added in API level 21
String getRoot ()

Gets the root id.

Note that the root id may become invalid or change when the browser is disconnected.

Returns
String

This value will never be null.

Throws
IllegalStateException if not connected.

getServiceComponent

added in API level 21
ComponentName getServiceComponent ()

Gets the service component that the media browser is connected to.

Returns
ComponentName

This value will never be null.

getSessionToken

added in API level 21
MediaSession.Token getSessionToken ()

Gets the media session token associated with the media browser.

Note that the session token may become invalid or change when the browser is disconnected.

Returns
MediaSession.Token The session token for the browser, never null.

Throws
IllegalStateException if not connected.

isConnected

added in API level 21
boolean isConnected ()

Returns whether the browser is connected to the service.

Returns
boolean

subscribe

added in API level 24
void subscribe (String parentId, 
                Bundle options, 
                MediaBrowser.SubscriptionCallback callback)

Queries with service-specific arguments for information about the media items that are contained within the specified id and subscribes to receive updates when they change.

The list of subscriptions is maintained even when not connected and is restored after the reconnection. It is ok to subscribe while not connected but the results will not be returned until the connection completes.

If the id is already subscribed with a different callback then the new callback will replace the previous one and the child data will be reloaded.

Parameters
parentId String: The id of the parent media item whose list of children will be subscribed.

This value must never be null.

options Bundle: The bundle of service-specific arguments to send to the media browser service. The contents of this bundle may affect the information returned when browsing.

This value must never be null.

callback MediaBrowser.SubscriptionCallback: The callback to receive the list of children.

This value must never be null.

subscribe

added in API level 21
void subscribe (String parentId, 
                MediaBrowser.SubscriptionCallback callback)

Queries for information about the media items that are contained within the specified id and subscribes to receive updates when they change.

The list of subscriptions is maintained even when not connected and is restored after the reconnection. It is ok to subscribe while not connected but the results will not be returned until the connection completes.

If the id is already subscribed with a different callback then the new callback will replace the previous one and the child data will be reloaded.

Parameters
parentId String: The id of the parent media item whose list of children will be subscribed.

This value must never be null.

callback MediaBrowser.SubscriptionCallback: The callback to receive the list of children.

This value must never be null.

unsubscribe

added in API level 21
void unsubscribe (String parentId)

Unsubscribes for changes to the children of the specified media id.

The query callback will no longer be invoked for results associated with this id once this method returns.

Parameters
parentId String: The id of the parent media item whose list of children will be unsubscribed.

This value must never be null.

unsubscribe

added in API level 24
void unsubscribe (String parentId, 
                MediaBrowser.SubscriptionCallback callback)

Unsubscribes for changes to the children of the specified media id through a callback.

The query callback will no longer be invoked for results associated with this id once this method returns.

Parameters
parentId String: The id of the parent media item whose list of children will be unsubscribed.

This value must never be null.

callback MediaBrowser.SubscriptionCallback: A callback sent to the media browser service to subscribe.

This value must never be null.

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