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| java.lang.Object | |
| ↳ | android.support.v7.media.MediaItemStatus |
Describes the playback status of a media item.
This class is part of the remote playback protocol described by the
MediaControlIntent class.
As a media item is played, it transitions through a sequence of states including:
pending, buffering,
playing, paused,
finished, canceled,
invalidated, and
error. Refer to the documentation of each state
for an explanation of its meaning.
While the item is playing, the playback status may also include progress information
about the content position and
content duration although not all route destinations
will report it.
To monitor playback status, the application should supply a PendingIntent to use as the
item status update receiver
for a given playback request. Note that
the status update receiver will only be invoked for major status changes such as a
transition from playing to finished.
The status update receiver will not be invoked for minor progress updates such as
changes to playback position or duration. If the application wants to monitor
playback progress, then it must use the
get status request to poll for changes
periodically and estimate the playback position while playing. Note that there may
be a significant power impact to polling so the application is advised only
to poll when the screen is on and never more than about once every 5 seconds or so.
This object is immutable once created using a MediaItemStatus.Builder instance.
| Nested Classes | |||||||||||
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| MediaItemStatus.Builder | Builder for media item status objects. |
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| Constants | |||||||||||
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| String | EXTRA_HTTP_RESPONSE_HEADERS | Bundle extra: HTTP response headers. | |||||||||
| String | EXTRA_HTTP_STATUS_CODE | Integer extra: HTTP status code. | |||||||||
| int | PLAYBACK_STATE_BUFFERING | Playback state: Buffering or seeking to a new position. | |||||||||
| int | PLAYBACK_STATE_CANCELED | Playback state: Canceled. | |||||||||
| int | PLAYBACK_STATE_ERROR | Playback state: Playback halted or aborted due to an error. | |||||||||
| int | PLAYBACK_STATE_FINISHED | Playback state: Finished. | |||||||||
| int | PLAYBACK_STATE_INVALIDATED | Playback state: Invalidated. | |||||||||
| int | PLAYBACK_STATE_PAUSED | Playback state: Paused. | |||||||||
| int | PLAYBACK_STATE_PENDING | Playback state: Pending. | |||||||||
| int | PLAYBACK_STATE_PLAYING | Playback state: Playing. | |||||||||
| Public Methods | |||||||||||
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Converts this object to a bundle for serialization.
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Creates an instance from a bundle.
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Gets the total duration of the content to be played as a long integer number of
milliseconds.
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Gets the content playback position as a long integer number of milliseconds
from the beginning of the content.
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Gets a bundle of extras for this status object.
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Gets the playback state of the media item.
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Gets the timestamp associated with the status information in
milliseconds since boot in the
elapsedRealtime() time base. | |||||||||||
Returns a string containing a concise, human-readable description of this
object.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Bundle extra: HTTP response headers.
Specifies the HTTP response headers that were returned when the content was requested from the network. The headers may include additional information about the content or any errors conditions that were encountered while trying to fetch the content.
The value is a Bundle of string based key-value pairs
that describe the HTTP response headers.
Integer extra: HTTP status code.
Specifies the HTTP status code that was encountered when the content was requested after all redirects were followed. This key only needs to specified when the content uri uses the HTTP or HTTPS scheme and an error occurred. This key may be omitted if the content was able to be played successfully; there is no need to report a 200 (OK) status code.
The value is an integer HTTP status code, such as 401 (Unauthorized), 404 (Not Found), or 500 (Server Error), or 0 if none.
Playback state: Buffering or seeking to a new position.
Indicates that the media item has been temporarily interrupted to fetch more content. Playback will continue automatically when enough content has been buffered.
Playback state: Canceled.
Indicates that the media item was explicitly removed from the queue by the
application. Items may be canceled and removed from the queue using
the remove or
stop action or by issuing
another play action that has the
side-effect of clearing the queue.
A canceled media item cannot be resumed. To play the content again, the
application must send a new play or
enqueue action.
Playback state: Playback halted or aborted due to an error.
Examples of errors are no network connectivity when attempting to retrieve content from a server, or expired user credentials when trying to play subscription-based content.
A media item in the error state cannot be resumed. To play the content again,
the application must send a new play or
enqueue action.
Playback state: Invalidated.
Indicates that the media item was invalidated permanently and involuntarily. This state is used to indicate that the media item was invalidated and removed from the queue because the session to which it belongs was invalidated (typically by another application taking control of the route).
When invalidation occurs, the application should generally wait for the user to perform an explicit action, such as clicking on a play button in the UI, before creating a new media session to avoid unnecessarily interrupting another application that may have just started using the route.
An invalidated media item cannot be resumed. To play the content again, the application
must send a new play or
enqueue action.
Playback state: Paused.
Indicates that playback of the media item has been paused. Playback can be
resumed using the resume action.
Playback state: Pending.
Indicates that the media item has not yet started playback but will be played eventually.
Playback state: Playing.
Indicates that the media item is currently playing.
Converts this object to a bundle for serialization.
Creates an instance from a bundle.
| bundle | The bundle, or null if none. |
|---|
Gets the total duration of the content to be played as a long integer number of milliseconds.
Gets the content playback position as a long integer number of milliseconds from the beginning of the content.
Gets a bundle of extras for this status object. The extras will be ignored by the media router but they may be used by applications.
Gets the playback state of the media item.
Gets the timestamp associated with the status information in
milliseconds since boot in the elapsedRealtime() time base.
elapsedRealtime() time base.
Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
getClass().getName() + '@' + Integer.toHexString(hashCode())
See Writing a useful
toString method
if you intend implementing your own toString method.