MediaPlayer
class MediaPlayer : SessionPlayer
| kotlin.Any | ||
| ↳ | androidx.media2.common.SessionPlayer | |
| ↳ | androidx.media2.player.MediaPlayer | |
A media player which plays MediaItems. The details on playback control and player states can be found in the documentation of the base class, SessionPlayer.
Topic covered here:
Audio focus and noisy intent
By default, MediaPlayer handles audio focus and noisy intent with AudioAttributesCompat set to this player. You need to call setAudioAttributes(AudioAttributesCompat) set the audio attribute while in the PLAYER_STATE_IDLE.
Here's the table of automatic audio focus behavior with audio attributes.
If an AudioAttributesCompat is not specified by setAudioAttributes, getAudioAttributes will return null and the default audio focus behavior will follow the null case on the table above.
For more information about the audio focus, take a look at Managing audio focus
Summary
Nested classes |
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| abstract |
Interface definition for callbacks to be invoked when the player has the corresponding events. |
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Class for the player to return each audio/video/subtitle track's metadata. |
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Constants |
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| static Int |
Informs that audio is not playing. |
| static Int |
Bad interleaving means that a media has been improperly interleaved or not interleaved at all, e. |
| static Int |
Update status in buffering a media source received through progressive downloading. |
| static Int |
A new set of metadata is available. |
| static Int |
The media cannot be seeked (e.g live stream) |
| static Int |
Informs that video is not playing. |
| static Int |
The player just pushed the very first video frame for rendering. |
| static Int |
The video is too complex for the decoder: it can't decode frames fast enough. |
| static Int |
The return value of |
| static Int |
File or network related operation errors. |
| static Int |
Bitstream is not conforming to the related coding standard or file spec. |
| static Int |
Some operation takes too long to complete, usually more than 3-5 seconds. |
| static Int |
Unspecified player error. |
| static Int |
Bitstream is conforming to the related coding standard or file spec, but the media framework does not support the feature. |
| static Int |
This mode is used with |
| static Int |
This mode is used with |
| static Int |
This mode is used with |
| static Int |
This mode is used with |
Inherited constants |
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Public constructors |
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Constructor to create a MediaPlayer instance. |
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Inherited functions |
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Constants
MEDIA_INFO_AUDIO_NOT_PLAYING
static val MEDIA_INFO_AUDIO_NOT_PLAYING: Int
Informs that audio is not playing. Note that playback of the video is not interrupted.
Value: 804
See Also
MEDIA_INFO_BAD_INTERLEAVING
static val MEDIA_INFO_BAD_INTERLEAVING: Int
Bad interleaving means that a media has been improperly interleaved or not interleaved at all, e.g has all the video samples first then all the audio ones. Video is playing but a lot of disk seeks may be happening.
Value: 800
See Also
MEDIA_INFO_BUFFERING_UPDATE
static val MEDIA_INFO_BUFFERING_UPDATE: Int
Update status in buffering a media source received through progressive downloading. The received buffering percentage indicates how much of the content has been buffered or played. For example a buffering update of 80 percent when half the content has already been played indicates that the next 30 percent of the content to play has been buffered.
The extra parameter in PlayerCallback#onInfo is the percentage (0-100) of the content that has been buffered or played thus far.
Value: 704
See Also
MEDIA_INFO_METADATA_UPDATE
static val MEDIA_INFO_METADATA_UPDATE: Int
A new set of metadata is available.
Value: 802
See Also
MEDIA_INFO_NOT_SEEKABLE
static val MEDIA_INFO_NOT_SEEKABLE: Int
The media cannot be seeked (e.g live stream)
Value: 801
See Also
MEDIA_INFO_VIDEO_NOT_PLAYING
static val MEDIA_INFO_VIDEO_NOT_PLAYING: Int
Informs that video is not playing. Note that playback of the audio is not interrupted.
Value: 805
See Also
MEDIA_INFO_VIDEO_RENDERING_START
static val MEDIA_INFO_VIDEO_RENDERING_START: Int
The player just pushed the very first video frame for rendering.
Value: 3
See Also
MEDIA_INFO_VIDEO_TRACK_LAGGING
static val MEDIA_INFO_VIDEO_TRACK_LAGGING: Int
The video is too complex for the decoder: it can't decode frames fast enough. Possibly only the audio plays fine at this stage.
Value: 700
See Also
NO_TRACK_SELECTED
static val NO_TRACK_SELECTED: Int
The return value of getSelectedTrack when there is no selected track for the given type.
Value: Integer.MIN_VALUE
See Also
PLAYER_ERROR_IO
static val PLAYER_ERROR_IO: Int
File or network related operation errors.
Value: -1004
See Also
PLAYER_ERROR_MALFORMED
static val PLAYER_ERROR_MALFORMED: Int
Bitstream is not conforming to the related coding standard or file spec.
Value: -1007
See Also
PLAYER_ERROR_TIMED_OUT
static val PLAYER_ERROR_TIMED_OUT: Int
Some operation takes too long to complete, usually more than 3-5 seconds.
Value: -110
See Also
PLAYER_ERROR_UNKNOWN
static val PLAYER_ERROR_UNKNOWN: Int
Unspecified player error.
Value: 1
See Also
PLAYER_ERROR_UNSUPPORTED
static val PLAYER_ERROR_UNSUPPORTED: Int
Bitstream is conforming to the related coding standard or file spec, but the media framework does not support the feature.
Value: -1010
See Also
SEEK_CLOSEST
static val SEEK_CLOSEST: Int
This mode is used with seekTo(long, int) to move media position to a frame (not necessarily a key frame) associated with a media item that is located closest to or at the given time.
Value: 0x03
See Also
SEEK_CLOSEST_SYNC
static val SEEK_CLOSEST_SYNC: Int
This mode is used with seekTo(long, int) to move media position to a sync (or key) frame associated with a media item that is located closest to (in time) or at the given time.
Value: 0x02
See Also
SEEK_NEXT_SYNC
static val SEEK_NEXT_SYNC: Int
This mode is used with seekTo(long, int) to move media position to a sync (or key) frame associated with a media item that is located right after or at the given time.
Value: 0x01
See Also
SEEK_PREVIOUS_SYNC
static val SEEK_PREVIOUS_SYNC: Int
This mode is used with seekTo(long, int) to move media position to a sync (or key) frame associated with a media item that is located right before or at the given time.
Value: 0x00
See Also
Public constructors
<init>
MediaPlayer(@NonNull context: Context)
Constructor to create a MediaPlayer instance.
| Parameters | |
|---|---|
context |
Context: A Context that will be used to resolve UriMediaItem. |
Public methods
addPlaylistItem
@NonNull fun addPlaylistItem(index: Int, @NonNull item: MediaItem): ListenableFuture<SessionPlayer.PlayerResult!>
attachAuxEffect
@NonNull fun attachAuxEffect(effectId: Int): ListenableFuture<SessionPlayer.PlayerResult!>
Attaches an auxiliary effect to the player. A typical auxiliary effect is a reverberation effect which can be applied on any sound source that directs a certain amount of its energy to this effect. This amount is defined by setAuxEffectSendLevel(). See setAuxEffectSendLevel(float).
After creating an auxiliary effect (e.g. android.media.audiofx.EnvironmentalReverb), retrieve its ID with android.media.audiofx.AudioEffect#getId() and use it when calling this method to attach the player to the effect.
To detach the effect from the player, call this method with a null effect id.
This method must be called before setMediaItem and setPlaylist methods.
| Parameters | |
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effectId |
Int: system wide unique id of the effect to attach |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed.
On success, a |
close
fun close(): Unit
getAudioAttributes
@Nullable fun getAudioAttributes(): AudioAttributesCompat?
getAudioSessionId
fun getAudioSessionId(): Int
Returns the audio session ID.
| Return | |
|---|---|
| Int: the audio session ID. {@see #setAudioSessionId(int)} Note that the audio session ID is 0 if a problem occurred when the MediaPlayer was constructed or it is closed. |
getBufferedPosition
fun getBufferedPosition(): Long
getBufferingState
fun getBufferingState(): Int
getCurrentMediaItem
@Nullable fun getCurrentMediaItem(): MediaItem?
getCurrentMediaItemIndex
fun getCurrentMediaItemIndex(): Int
getCurrentPosition
fun getCurrentPosition(): Long
getDuration
fun getDuration(): Long
getMaxPlayerVolume
fun getMaxPlayerVolume(): Float
| Return | |
|---|---|
Float: the maximum volume that can be used in setPlayerVolume(float). |
getNextMediaItemIndex
fun getNextMediaItemIndex(): Int
getPlaybackParams
@NonNull fun getPlaybackParams(): PlaybackParams
Gets the playback params, containing the current playback rate.
| Return | |
|---|---|
| PlaybackParams: the playback params. |
getPlaybackSpeed
fun getPlaybackSpeed(): Float
getPlayerState
fun getPlayerState(): Int
getPlayerVolume
fun getPlayerVolume(): Float
| Return | |
|---|---|
| Float: the current volume of this player to this player. Note that it does not take into account the associated stream volume. |
getPlaylist
@Nullable fun getPlaylist(): MutableList<MediaItem!>?
getPlaylistMetadata
@Nullable fun getPlaylistMetadata(): MediaMetadata?
getPreviousMediaItemIndex
fun getPreviousMediaItemIndex(): Int
getRepeatMode
fun getRepeatMode(): Int
getSelectedTrack
@Nullable fun getSelectedTrack(trackType: Int): MediaPlayer.TrackInfo?
Returns the audio or video track currently selected for playback. The return value is an element in the list returned by getTrackInfo(), and can be used in calls to selectTrack(TrackInfo).
| Parameters | |
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trackType |
Int: should be one of TrackInfo#MEDIA_TRACK_TYPE_VIDEO or TrackInfo#MEDIA_TRACK_TYPE_AUDIO |
| Return | |
|---|---|
MediaPlayer.TrackInfo?: metadata corresponding to the audio or video track currently selected for playback; null is returned when there is no selected track for trackType or when trackType is not one of audio or video. |
| Exceptions | |
|---|---|
IllegalStateException |
if called after close() |
getShuffleMode
fun getShuffleMode(): Int
getTimestamp
@Nullable fun getTimestamp(): MediaTimestamp?
Gets current playback position as a MediaTimestamp.
The MediaTimestamp represents how the media time correlates to the system time in a linear fashion using an anchor and a clock rate. During regular playback, the media time moves fairly constantly (though the anchor frame may be rebased to a current system time, the linear correlation stays steady). Therefore, this method does not need to be called often.
To help users get current playback position, this method always anchors the timestamp to the current system time, so MediaTimestamp#getAnchorMediaTimeUs can be used as current playback position.
| Return | |
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MediaTimestamp?: a MediaTimestamp object if a timestamp is available, or null if no timestamp is available, e.g. because the media player has not been initialized. |
See Also
getTrackInfo
@NonNull fun getTrackInfo(): MutableList<MediaPlayer.TrackInfo!>
Returns a List of track information.
| Return | |
|---|---|
| MutableList<MediaPlayer.TrackInfo!>: List of track info. The total number of tracks is the size of the list. |
getVideoSize
@NonNull fun getVideoSize(): VideoSize
Returns the size of the video.
| Return | |
|---|---|
VideoSize: the size of the video. The width and height of size could be 0 if there is no video or the size has not been determined yet. The PlayerCallback can be registered via registerPlayerCallback to receive a notification PlayerCallback#onVideoSizeChanged when the size is available. |
pause
@NonNull fun pause(): ListenableFuture<SessionPlayer.PlayerResult!>
play
@NonNull fun play(): ListenableFuture<SessionPlayer.PlayerResult!>
prepare
@NonNull fun prepare(): ListenableFuture<SessionPlayer.PlayerResult!>
Prepares the media items for playback.
After setting the media items and the display surface, you need to call this method. During this preparation, the player may allocate resources required to play, such as audio and video decoders.
On success, a SessionPlayer.PlayerResult is returned with the current media item when the command completed.
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed. |
registerPlayerCallback
fun registerPlayerCallback(@NonNull executor: Executor, @NonNull callback: MediaPlayer.PlayerCallback): Unit
Register PlayerCallback to listen changes.
| Parameters | |
|---|---|
executor |
Executor: a callback Executor |
callback |
Executor: a PlayerCallback |
| Exceptions | |
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IllegalArgumentException |
if executor or callback is null. |
removePlaylistItem
@NonNull fun removePlaylistItem(index: Int): ListenableFuture<SessionPlayer.PlayerResult!>
replacePlaylistItem
@NonNull fun replacePlaylistItem(index: Int, @NonNull item: MediaItem): ListenableFuture<SessionPlayer.PlayerResult!>
reset
fun reset(): Unit
Resets MediaPlayer to its uninitialized state if not closed. After calling this method, you will have to initialize it again by setting the media item and calling prepare().
Note that if the player is closed, there is no way to reuse the instance.
seekTo
@NonNull fun seekTo(position: Long): ListenableFuture<SessionPlayer.PlayerResult!>
seekTo
@NonNull fun seekTo(position: Long, mode: Int): ListenableFuture<SessionPlayer.PlayerResult!>
Moves the media to specified time position by considering the given mode.
There is at most one active seekTo processed at any time. If there is a to-be-completed seekTo, new seekTo requests will be queued in such a way that only the last request is kept. When current seekTo is completed, the queued request will be processed if that request is different from just-finished seekTo operation, i.e., the requested position or mode is different.
On success, a SessionPlayer.PlayerResult is returned with the current media item when the command completed.
| Parameters | |
|---|---|
position |
Long: the offset in milliseconds from the start to seek to. When seeking to the given time position, there is no guarantee that the media item has a frame located at the position. When this happens, a frame nearby will be rendered. The value should be in the range of start and end positions defined in MediaItem. |
mode |
Long: the mode indicating where exactly to seek to. |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed. |
selectTrack
@NonNull fun selectTrack(@NonNull trackInfo: MediaPlayer.TrackInfo): ListenableFuture<SessionPlayer.PlayerResult!>
Selects a track.
If the player is in invalid state, SessionPlayer.PlayerResult#RESULT_ERROR_INVALID_STATE will be reported with SessionPlayer.PlayerResult. If a player is in Playing state, the selected track is presented immediately. If a player is not in Playing state, it just marks the track to be played.
In any valid state, if it is called multiple times on the same type of track (ie. Video, Audio), the most recent one will be chosen.
The first audio and video tracks are selected by default if available, even though this method is not called.
Currently, audio tracks can be selected via this method.
| Parameters | |
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trackInfo |
MediaPlayer.TrackInfo: metadata corresponding to the track to be selected. A trackInfo object can be obtained from getTrackInfo().
On success, a |
| Return | |
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ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed. |
See Also
setAudioAttributes
@NonNull fun setAudioAttributes(@NonNull attr: AudioAttributesCompat): ListenableFuture<SessionPlayer.PlayerResult!>
setAudioSessionId
@NonNull fun setAudioSessionId(sessionId: Int): ListenableFuture<SessionPlayer.PlayerResult!>
Sets the audio session ID.
| Parameters | |
|---|---|
sessionId |
Int: the audio session ID. The audio session ID is a system wide unique identifier for the audio stream played by this MediaPlayer2 instance. The primary use of the audio session ID is to associate audio effects to a particular instance of MediaPlayer2: if an audio session ID is provided when creating an audio effect, this effect will be applied only to the audio content of media players within the same audio session and not to the output mix. When created, a MediaPlayer2 instance automatically generates its own audio session ID. However, it is possible to force this player to be part of an already existing audio session by calling this method.
This method must be called before |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed.
On success, a |
See Also
setAuxEffectSendLevel
@NonNull fun setAuxEffectSendLevel(level: Float): ListenableFuture<SessionPlayer.PlayerResult!>
Sets the send level of the player to the attached auxiliary effect. See attachAuxEffect(int). The level value range is 0 to 1.0.
By default the send level is 0, so even if an effect is attached to the player this method must be called for the effect to be applied.
Note that the passed level value is a raw scalar. UI controls should be scaled logarithmically: the gain applied by audio framework ranges from -72dB to 0dB, so an appropriate conversion from linear UI input x to level is: x == 0 -> level = 0 0 < x <= R -> level = 10^(72*(x-R)/20/R)
On success, a SessionPlayer.PlayerResult is returned with the current media item when the command completed.
| Parameters | |
|---|---|
level |
Float: send level scalar |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed. |
setMediaItem
@NonNull fun setMediaItem(@NonNull item: MediaItem): ListenableFuture<SessionPlayer.PlayerResult!>
setPlaybackParams
@NonNull fun setPlaybackParams(@NonNull params: PlaybackParams): ListenableFuture<SessionPlayer.PlayerResult!>
Sets playback params using PlaybackParams.
On success, a SessionPlayer.PlayerResult is returned with the current media item when the command completed.
| Parameters | |
|---|---|
params |
PlaybackParams: the playback params. |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed. |
setPlaybackSpeed
@NonNull fun setPlaybackSpeed(playbackSpeed: Float): ListenableFuture<SessionPlayer.PlayerResult!>
Sets the playback speed. 1.0f is the default, and values less than or equal to 0.0f are not allowed.
The supported playback speed range depends on the underlying player implementation, so it is recommended to query the actual speed of the player via getPlaybackSpeed() after the operation completes.
| Parameters | |
|---|---|
playbackSpeed |
Float: The requested playback speed. |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: A ListenableFuture representing the pending completion of the command. |
setPlayerVolume
@NonNull fun setPlayerVolume(volume: Float): ListenableFuture<SessionPlayer.PlayerResult!>
Sets the volume of the audio of the media to play, expressed as a linear multiplier on the audio samples.
Note that this volume is specific to the player, and is separate from stream volume used across the platform.
A value of 0.0f indicates muting, a value of 1.0f is the nominal unattenuated and unamplified gain. See getMaxPlayerVolume() for the volume range supported by this player.
The default player volume is 1.0f.
On success, a SessionPlayer.PlayerResult is returned with the current media item when the command completed.
| Parameters | |
|---|---|
volume |
Float: a value between 0.0f and getMaxPlayerVolume(). |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed. |
setPlaylist
@NonNull fun setPlaylist(@NonNull playlist: MutableList<MediaItem!>, @Nullable metadata: MediaMetadata?): ListenableFuture<SessionPlayer.PlayerResult!>
setRepeatMode
@NonNull fun setRepeatMode(repeatMode: Int): ListenableFuture<SessionPlayer.PlayerResult!>
setShuffleMode
@NonNull fun setShuffleMode(shuffleMode: Int): ListenableFuture<SessionPlayer.PlayerResult!>
setSurface
@NonNull fun setSurface(@Nullable surface: Surface?): ListenableFuture<SessionPlayer.PlayerResult!>
Sets the Surface to be used as the sink for the video portion of the media.
A null surface will result in only the audio track being played.
If the Surface sends frames to a SurfaceTexture, the timestamps returned from SurfaceTexture#getTimestamp() will have an unspecified zero point. These timestamps cannot be directly compared between different media sources, different instances of the same media source, or multiple runs of the same program. The timestamp is normally monotonically increasing and is unaffected by time-of-day adjustments, but it is reset when the position is set.
On success, a SessionPlayer.PlayerResult is returned with the current media item when the command completed.
| Parameters | |
|---|---|
surface |
Surface?: The Surface to be used for the video portion of the media. |
| Return | |
|---|---|
ListenableFuture<SessionPlayer.PlayerResult!>: a ListenableFuture which represents the pending completion of the command. SessionPlayer.PlayerResult will be delivered when the command completed. |
skipToNextPlaylistItem
@NonNull fun skipToNextPlaylistItem(): ListenableFuture<SessionPlayer.PlayerResult!>
skipToPlaylistItem
@NonNull fun skipToPlaylistItem(index: Int): ListenableFuture<SessionPlayer.PlayerResult!>
skipToPreviousPlaylistItem
@NonNull fun skipToPreviousPlaylistItem(): ListenableFuture<SessionPlayer.PlayerResult!>
unregisterPlayerCallback
fun unregisterPlayerCallback(@NonNull callback: MediaPlayer.PlayerCallback): Unit
Unregister the previously registered PlayerCallback.
| Parameters | |
|---|---|
callback |
MediaPlayer.PlayerCallback: the callback to be removed |
| Exceptions | |
|---|---|
IllegalArgumentException |
if the callback is null. |
updatePlaylistMetadata
@NonNull fun updatePlaylistMetadata(@Nullable metadata: MediaMetadata?): ListenableFuture<SessionPlayer.PlayerResult!>