RemotePlaybackClient

class RemotePlaybackClient


A helper class for playing media on remote routes using the remote playback protocol defined by MediaControlIntent.

The client maintains session state and offers a simplified interface for issuing remote playback media control intents to a single route.

Summary

Nested types

Base callback type for remote playback requests.

Callback for remote playback requests that operate on items.

A callback that will receive messages from media sessions.

Callback for remote playback requests that operate on sessions.

A callback that will receive media status updates.

Public constructors

Creates a remote playback client for a route.

Public functions

Unit
endSession(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
)

Sends a request to end the media playback session.

Unit
enqueue(
    contentUri: Uri,
    mimeType: String?,
    metadata: Bundle?,
    positionMillis: Long,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
)

Sends a request to enqueue a media item.

String?

Gets the current session id if there is one.

Unit

Sends a request to get the status of the media playback session.

Unit
getStatus(
    itemId: String,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
)

Sends a request to get the status of a media item.

Boolean

Returns true if the client currently has a session.

Boolean

Returns true if the route supports messages.

Boolean

Returns true if the route supports queuing features.

Boolean

Returns true if the route supports remote playback.

Boolean

Returns true if the route supports session management features.

Unit
pause(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
)

Sends a request to pause media playback.

Unit
play(
    contentUri: Uri,
    mimeType: String?,
    metadata: Bundle?,
    positionMillis: Long,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
)

Sends a request to play a media item.

Unit

Releases resources owned by the client.

Unit
remove(
    itemId: String,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
)

Sends a request to remove a media item from the queue.

Unit
resume(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
)

Sends a request to resume (unpause) media playback.

Unit
seek(
    itemId: String,
    positionMillis: Long,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
)

Sends a request to seek to a new position in a media item.

Unit
sendMessage(
    message: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
)

Sends a message.

Unit

Sets a callback that should receive messages when a message is sent from media sessions created by this instance of the remote playback client changes.

Unit
setSessionId(sessionId: String?)

Sets the current session id.

Unit

Sets a callback that should receive status updates when the state of media sessions or media items created by this instance of the remote playback client changes.

Unit
startSession(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
)

Sends a request to start a new media playback session.

Unit
stop(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
)

Sends a request to stop media playback and clear the media playback queue.

Public constructors

RemotePlaybackClient

Added in 1.1.0
RemotePlaybackClient(context: Context, route: MediaRouter.RouteInfo)

Creates a remote playback client for a route.

Parameters
route: MediaRouter.RouteInfo

The media route.

Public functions

endSession

Added in 1.1.0
fun endSession(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
): Unit

Sends a request to end the media playback session.

The request is issued in the current session. If this request is successful, the session id property will be set to null after the callback is invoked.

Please refer to ACTION_END_SESSION for more information about the semantics of this request.

Parameters
extras: Bundle?

A bundle of extra arguments to be added to the ACTION_END_SESSION intent, or null if none.

callback: RemotePlaybackClient.SessionActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

java.lang.UnsupportedOperationException

if the route does not support session management.

enqueue

Added in 1.1.0
fun enqueue(
    contentUri: Uri,
    mimeType: String?,
    metadata: Bundle?,
    positionMillis: Long,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
): Unit

Sends a request to enqueue a media item.

Enqueues a new item to play. If the queue was previously paused, then will remain paused.

The request is issued in the current session. If no session is available, then one is created implicitly.

Please refer to ACTION_ENQUEUE for more information about the semantics of this request.

Parameters
contentUri: Uri

The content Uri to enqueue.

mimeType: String?

The mime type of the content, or null if unknown.

metadata: Bundle?

The media item metadata bundle, or null if none.

positionMillis: Long

The initial content position for the item in milliseconds, or 0 to start at the beginning.

extras: Bundle?

A bundle of extra arguments to be added to the ACTION_ENQUEUE intent, or null if none.

callback: RemotePlaybackClient.ItemActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.UnsupportedOperationException

if the route does not support queuing.

getSessionId

Added in 1.1.0
fun getSessionId(): String?

Gets the current session id if there is one.

Returns
String?

The current session id, or null if none.

getSessionStatus

Added in 1.1.0
fun getSessionStatus(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
): Unit

Sends a request to get the status of the media playback session.

The request is issued in the current session.

Please refer to ACTION_GET_SESSION_STATUS for more information about the semantics of this request.

Parameters
extras: Bundle?

A bundle of extra arguments to be added to the ACTION_GET_SESSION_STATUS intent, or null if none.

callback: RemotePlaybackClient.SessionActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

java.lang.UnsupportedOperationException

if the route does not support session management.

getStatus

Added in 1.1.0
fun getStatus(
    itemId: String,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
): Unit

Sends a request to get the status of a media item.

The request is issued in the current session.

Please refer to ACTION_GET_STATUS for more information about the semantics of this request.

Parameters
itemId: String

The item id.

extras: Bundle?

A bundle of extra arguments to be added to the ACTION_GET_STATUS intent, or null if none.

callback: RemotePlaybackClient.ItemActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

hasSession

Added in 1.1.0
fun hasSession(): Boolean

Returns true if the client currently has a session.

Equivalent to checking whether getSessionId returns a non-null result.

Returns
Boolean

True if there is a current session.

isMessagingSupported

Added in 1.1.0
fun isMessagingSupported(): Boolean

Returns true if the route supports messages.

This method returns true if the route supports all of the basic remote playback actions and all of the following actions: start session, send message, end session.

Returns
Boolean

True if session management is supported. Implies isRemotePlaybackSupported is also true.

isQueuingSupported

Added in 1.1.0
fun isQueuingSupported(): Boolean

Returns true if the route supports queuing features.

If the route does not support queuing, then at most one media item can be played at a time and the enqueue method will not be available.

This method returns true if the route supports all of the basic remote playback actions and all of the following actions: enqueue, remove.

Returns
Boolean

True if queuing is supported. Implies isRemotePlaybackSupported is also true.

isRemotePlaybackSupported

Added in 1.1.0
fun isRemotePlaybackSupported(): Boolean

Returns true if the route supports remote playback.

If the route does not support remote playback, then none of the functionality offered by the client will be available.

This method returns true if the route supports all of the following actions: play, seek, get status, pause, resume, stop.

Returns
Boolean

True if remote playback is supported.

isSessionManagementSupported

Added in 1.1.0
fun isSessionManagementSupported(): Boolean

Returns true if the route supports session management features.

If the route does not support session management, then the session will not be created until the first media item is played.

This method returns true if the route supports all of the basic remote playback actions and all of the following actions: start session, get session status, end session.

Returns
Boolean

True if session management is supported. Implies isRemotePlaybackSupported is also true.

pause

Added in 1.1.0
fun pause(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
): Unit

Sends a request to pause media playback.

The request is issued in the current session. If playback is already paused then the request has no effect.

Please refer to ACTION_PAUSE for more information about the semantics of this request.

Parameters
extras: Bundle?

A bundle of extra arguments to be added to the ACTION_PAUSE intent, or null if none.

callback: RemotePlaybackClient.SessionActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

play

Added in 1.1.0
fun play(
    contentUri: Uri,
    mimeType: String?,
    metadata: Bundle?,
    positionMillis: Long,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
): Unit

Sends a request to play a media item.

Clears the queue and starts playing the new item immediately. If the queue was previously paused, then it is resumed as a side-effect of this request.

The request is issued in the current session. If no session is available, then one is created implicitly.

Please refer to ACTION_PLAY for more information about the semantics of this request.

Parameters
contentUri: Uri

The content Uri to play.

mimeType: String?

The mime type of the content, or null if unknown.

metadata: Bundle?

The media item metadata bundle, or null if none.

positionMillis: Long

The initial content position for the item in milliseconds, or 0 to start at the beginning.

extras: Bundle?

A bundle of extra arguments to be added to the ACTION_PLAY intent, or null if none.

callback: RemotePlaybackClient.ItemActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.UnsupportedOperationException

if the route does not support remote playback.

release

Added in 1.1.0
fun release(): Unit

Releases resources owned by the client.

remove

Added in 1.1.0
fun remove(
    itemId: String,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
): Unit

Sends a request to remove a media item from the queue.

The request is issued in the current session.

Please refer to ACTION_REMOVE for more information about the semantics of this request.

Parameters
itemId: String

The item id.

extras: Bundle?

A bundle of extra arguments to be added to the ACTION_REMOVE intent, or null if none.

callback: RemotePlaybackClient.ItemActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

java.lang.UnsupportedOperationException

if the route does not support queuing.

resume

Added in 1.1.0
fun resume(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
): Unit

Sends a request to resume (unpause) media playback.

The request is issued in the current session. If playback is not paused then the request has no effect.

Please refer to ACTION_RESUME for more information about the semantics of this request.

Parameters
extras: Bundle?

A bundle of extra arguments to be added to the ACTION_RESUME intent, or null if none.

callback: RemotePlaybackClient.SessionActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

seek

Added in 1.1.0
fun seek(
    itemId: String,
    positionMillis: Long,
    extras: Bundle?,
    callback: RemotePlaybackClient.ItemActionCallback?
): Unit

Sends a request to seek to a new position in a media item.

Seeks to a new position. If the queue was previously paused then it remains paused but the item's new position is still remembered.

The request is issued in the current session.

Please refer to ACTION_SEEK for more information about the semantics of this request.

Parameters
itemId: String

The item id.

positionMillis: Long

The new content position for the item in milliseconds, or 0 to start at the beginning.

extras: Bundle?

A bundle of extra arguments to be added to the ACTION_SEEK intent, or null if none.

callback: RemotePlaybackClient.ItemActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

sendMessage

Added in 1.1.0
fun sendMessage(
    message: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
): Unit

Sends a message.

The request is issued in the current session.

Please refer to ACTION_SEND_MESSAGE for more information about the semantics of this request.

Parameters
message: Bundle?

A bundle message denoting EXTRA_MESSAGE.

callback: RemotePlaybackClient.SessionActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.

java.lang.UnsupportedOperationException

if the route does not support messages.

setOnMessageReceivedListener

Added in 1.1.0
fun setOnMessageReceivedListener(
    listener: RemotePlaybackClient.OnMessageReceivedListener?
): Unit

Sets a callback that should receive messages when a message is sent from media sessions created by this instance of the remote playback client changes.

The callback should be set before the session is created.

Parameters
listener: RemotePlaybackClient.OnMessageReceivedListener?

The callback to set. May be null to remove the previous callback.

setSessionId

Added in 1.1.0
fun setSessionId(sessionId: String?): Unit

Sets the current session id.

It is usually not necessary to set the session id explicitly since it is created as a side-effect of other requests such as play, enqueue, and startSession.

Parameters
sessionId: String?

The new session id, or null if none.

setStatusCallback

Added in 1.1.0
fun setStatusCallback(callback: RemotePlaybackClient.StatusCallback?): Unit

Sets a callback that should receive status updates when the state of media sessions or media items created by this instance of the remote playback client changes.

The callback should be set before the session is created or any play commands are issued.

Parameters
callback: RemotePlaybackClient.StatusCallback?

The callback to set. May be null to remove the previous callback.

startSession

Added in 1.1.0
fun startSession(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
): Unit

Sends a request to start a new media playback session.

The application must wait for the callback to indicate that this request is complete before issuing other requests that affect the session. If this request is successful then the previous session will be invalidated.

Please refer to ACTION_START_SESSION for more information about the semantics of this request.

Parameters
extras: Bundle?

A bundle of extra arguments to be added to the ACTION_START_SESSION intent, or null if none.

callback: RemotePlaybackClient.SessionActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.UnsupportedOperationException

if the route does not support session management.

stop

Added in 1.1.0
fun stop(
    extras: Bundle?,
    callback: RemotePlaybackClient.SessionActionCallback?
): Unit

Sends a request to stop media playback and clear the media playback queue.

The request is issued in the current session. If the queue is already empty then the request has no effect.

Please refer to ACTION_STOP for more information about the semantics of this request.

Parameters
extras: Bundle?

A bundle of extra arguments to be added to the ACTION_STOP intent, or null if none.

callback: RemotePlaybackClient.SessionActionCallback?

A callback to invoke when the request has been processed, or null if none.

Throws
java.lang.IllegalStateException

if there is no current session.