All Known Implementing Classes:

DefaultPlaybackSessionManager
```
public interface PlaybackSessionManager
```
Manager for active playback sessions.
The manager keeps track of the association between window index and/or media period id to session identifier.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface PlaybackSessionManager.Listener
A listener for session updates.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`belongsToSession(AnalyticsListener.EventTime eventTime, String sessionId)`	Returns whether an event time belong to a session.
`void`	`finishAllSessions(AnalyticsListener.EventTime eventTime)`	Finishes all existing sessions and calls their respective `PlaybackSessionManager.Listener.onSessionFinished(EventTime, String, boolean)` callback.
`String`	`getActiveSessionId()`	Returns the session identifier of the session that is currently actively playing, or `null` if there no such session.
`String`	`getSessionForMediaPeriodId(Timeline timeline, MediaSource.MediaPeriodId mediaPeriodId)`	Returns the session identifier for the given media period id.
`void`	`setListener(PlaybackSessionManager.Listener listener)`	Sets the listener to be notified of session updates.
`void`	`updateSessions(AnalyticsListener.EventTime eventTime)`	Updates or creates sessions based on a player `AnalyticsListener.EventTime`.
`void`	`updateSessionsWithDiscontinuity(AnalyticsListener.EventTime eventTime, @com.google.android.exoplayer2.Player.DiscontinuityReason int reason)`	Updates or creates sessions based on a position discontinuity at `AnalyticsListener.EventTime`.
`void`	`updateSessionsWithTimelineChange(AnalyticsListener.EventTime eventTime)`	Updates or creates sessions based on a `Timeline` change at `AnalyticsListener.EventTime`.

- Method Detail
  - setListener
```
void setListener(PlaybackSessionManager.Listener listener)
```
    Sets the listener to be notified of session updates. Must be called before the session manager is used.
    
    Parameters:
    
    listener - The PlaybackSessionManager.Listener to be notified of session updates.
  - getSessionForMediaPeriodId
```
String getSessionForMediaPeriodId(Timeline timeline,
                                  MediaSource.MediaPeriodId mediaPeriodId)
```
    Returns the session identifier for the given media period id.
    Note that this will reserve a new session identifier if it doesn't exist yet, but will not call any PlaybackSessionManager.Listener callbacks.
    
    Parameters:
    
    timeline - The timeline, mediaPeriodId is part of.
    
    mediaPeriodId - A MediaSource.MediaPeriodId.
  - belongsToSession
```
boolean belongsToSession(AnalyticsListener.EventTime eventTime,
                         String sessionId)
```
    Returns whether an event time belong to a session.
    
    Parameters:
    
    eventTime - The AnalyticsListener.EventTime.
    
    sessionId - A session identifier.
    
    Returns:
    
    Whether the event belongs to the specified session.
  - updateSessions
```
void updateSessions(AnalyticsListener.EventTime eventTime)
```
    Updates or creates sessions based on a player AnalyticsListener.EventTime.
    Call updateSessionsWithTimelineChange(EventTime) or updateSessionsWithDiscontinuity(EventTime, int) if the event is a Timeline change or a position discontinuity respectively.
    
    Parameters:
    
    eventTime - The AnalyticsListener.EventTime.
  - updateSessionsWithTimelineChange
```
void updateSessionsWithTimelineChange(AnalyticsListener.EventTime eventTime)
```
    Updates or creates sessions based on a Timeline change at AnalyticsListener.EventTime.
    Should be called instead of updateSessions(EventTime) if a Timeline change occurred.
    
    Parameters:
    
    eventTime - The AnalyticsListener.EventTime with the timeline change.
  - updateSessionsWithDiscontinuity
```
void updateSessionsWithDiscontinuity(AnalyticsListener.EventTime eventTime,
                                     @DiscontinuityReason
                                     @com.google.android.exoplayer2.Player.DiscontinuityReason int reason)
```
    Updates or creates sessions based on a position discontinuity at AnalyticsListener.EventTime.
    Should be called instead of updateSessions(EventTime) if a position discontinuity occurred.
    
    Parameters:
    
    eventTime - The AnalyticsListener.EventTime of the position discontinuity.
    
    reason - The Player.DiscontinuityReason.
  - getActiveSessionId
```
@Nullable
String getActiveSessionId()
```
    Returns the session identifier of the session that is currently actively playing, or null if there no such session.
  - finishAllSessions
```
void finishAllSessions(AnalyticsListener.EventTime eventTime)
```
    Finishes all existing sessions and calls their respective PlaybackSessionManager.Listener.onSessionFinished(EventTime, String, boolean) callback.
    
    Parameters:
    
    eventTime - The event time at which sessions are finished.

Interface PlaybackSessionManager

Nested Class Summary

Method Summary

Method Detail

setListener

getSessionForMediaPeriodId

belongsToSession

updateSessions

updateSessionsWithTimelineChange

updateSessionsWithDiscontinuity

getActiveSessionId

finishAllSessions