MediaSyncEvent
public
class
MediaSyncEvent
extends Object
implements
Parcelable
| java.lang.Object | |
| ↳ | android.media.MediaSyncEvent |
The MediaSyncEvent class defines events that can be used to synchronize playback or capture actions between different players and recorders.
For instance, AudioRecord#startRecording(MediaSyncEvent) is used to start capture
only when the playback on a particular audio session is complete.
The audio session ID is retrieved from a player (e.g MediaPlayer, AudioTrack or
ToneGenerator) by use of the getAudioSessionId() method.
Summary
Constants | |
|---|---|
int |
SYNC_EVENT_NONE
No sync event specified. |
int |
SYNC_EVENT_PRESENTATION_COMPLETE
The corresponding action is triggered only when the presentation is completed (meaning the media has been presented to the user) on the specified session. |
Inherited constants |
|---|
Fields | |
|---|---|
public
static
final
Creator<MediaSyncEvent> |
CREATOR
|
Public methods | |
|---|---|
static
MediaSyncEvent
|
createEvent(int eventType)
Creates a synchronization event of the sepcified type. |
int
|
describeContents()
Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
boolean
|
equals(Object o)
Indicates whether some other object is "equal to" this one. |
int
|
getAudioSessionId()
Gets the synchronization event audio session ID. |
int
|
getType()
Gets the synchronization event type. |
int
|
hashCode()
Returns a hash code value for the object. |
MediaSyncEvent
|
setAudioSessionId(int audioSessionId)
Sets the event source audio session ID. |
String
|
toString()
Returns a string representation of the object. |
void
|
writeToParcel(Parcel dest, int flags)
Flatten this object in to a Parcel. |
Inherited methods | |
|---|---|
Constants
SYNC_EVENT_NONE
public static final int SYNC_EVENT_NONE
No sync event specified. When used with a synchronized playback or capture method, the behavior is equivalent to calling the corresponding non synchronized method.
Constant Value: 0 (0x00000000)
SYNC_EVENT_PRESENTATION_COMPLETE
public static final int SYNC_EVENT_PRESENTATION_COMPLETE
The corresponding action is triggered only when the presentation is completed
(meaning the media has been presented to the user) on the specified session.
A synchronization of this type requires a source audio session ID to be set via
setAudioSessionId(int) method.
Constant Value: 1 (0x00000001)
Fields
Public methods
createEvent
public static MediaSyncEvent createEvent (int eventType)
Creates a synchronization event of the sepcified type.
The type specifies which kind of event is monitored.
For instance, event SYNC_EVENT_PRESENTATION_COMPLETE corresponds to the audio being
presented to the user on a particular audio session.
| Parameters | |
|---|---|
eventType |
int: the synchronization event type. |
| Returns | |
|---|---|
MediaSyncEvent |
the MediaSyncEvent created. |
| Throws | |
|---|---|
|
java.lang.IllegalArgumentException |
IllegalArgumentException |
|
describeContents
public int describeContents ()
Describe the kinds of special objects contained in this Parcelable
instance's marshaled representation. For example, if the object will
include a file descriptor in the output of writeToParcel(android.os.Parcel, int),
the return value of this method must include the
CONTENTS_FILE_DESCRIPTOR bit.
| Returns | |
|---|---|
int |
a bitmask indicating the set of special object types marshaled
by this Parcelable object instance.
Value is either 0 or CONTENTS_FILE_DESCRIPTOR |
equals
public boolean equals (Object o)
Indicates whether some other object is "equal to" this one.
The equals method implements an equivalence relation
on non-null object references:
- It is reflexive: for any non-null reference value
x,x.equals(x)should returntrue. - It is symmetric: for any non-null reference values
xandy,x.equals(y)should returntrueif and only ify.equals(x)returnstrue. - It is transitive: for any non-null reference values
x,y, andz, ifx.equals(y)returnstrueandy.equals(z)returnstrue, thenx.equals(z)should returntrue. - It is consistent: for any non-null reference values
xandy, multiple invocations ofx.equals(y)consistently returntrueor consistently returnfalse, provided no information used inequalscomparisons on the objects is modified. - For any non-null reference value
x,x.equals(null)should returnfalse.
The equals method for class Object implements
the most discriminating possible equivalence relation on objects;
that is, for any non-null reference values x and
y, this method returns true if and only
if x and y refer to the same object
(x == y has the value true).
Note that it is generally necessary to override the hashCode
method whenever this method is overridden, so as to maintain the
general contract for the hashCode method, which states
that equal objects must have equal hash codes.
| Parameters | |
|---|---|
o |
Object: the reference object with which to compare. |
| Returns | |
|---|---|
boolean |
true if this object is the same as the obj
argument; false otherwise. |
getAudioSessionId
public int getAudioSessionId ()
Gets the synchronization event audio session ID.
| Returns | |
|---|---|
int |
the synchronization audio session ID. The returned audio session ID is 0 if it has not been set. |
getType
public int getType ()
Gets the synchronization event type.
| Returns | |
|---|---|
int |
the synchronization event type. |
hashCode
public int hashCode ()
Returns a hash code value for the object. This method is
supported for the benefit of hash tables such as those provided by
HashMap.
The general contract of hashCode is:
- Whenever it is invoked on the same object more than once during
an execution of a Java application, the
hashCodemethod must consistently return the same integer, provided no information used inequalscomparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. - If two objects are equal according to the
equals(Object)method, then calling thehashCodemethod on each of the two objects must produce the same integer result. - It is not required that if two objects are unequal
according to the
equals(java.lang.Object)method, then calling thehashCodemethod on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.
As much as is reasonably practical, the hashCode method defined
by class Object does return distinct integers for
distinct objects. (The hashCode may or may not be implemented
as some function of an object's memory address at some point
in time.)
| Returns | |
|---|---|
int |
a hash code value for this object. |
setAudioSessionId
public MediaSyncEvent setAudioSessionId (int audioSessionId)
Sets the event source audio session ID.
The audio session ID specifies on which audio session the synchronization event should be
monitored.
It is mandatory for certain event types (e.g. SYNC_EVENT_PRESENTATION_COMPLETE).
For instance, the audio session ID can be retrieved via
MediaPlayer#getAudioSessionId() when monitoring an event on a particular MediaPlayer.
| Parameters | |
|---|---|
audioSessionId |
int: the audio session ID of the event source being monitored. |
| Returns | |
|---|---|
MediaSyncEvent |
the MediaSyncEvent the method is called on. |
| Throws | |
|---|---|
|
java.lang.IllegalArgumentException |
IllegalArgumentException |
|
toString
public String toString ()
Returns a string representation of the object. In general, the
toString method returns a string that
"textually represents" this object. The result should
be a concise but informative representation that is easy for a
person to read.
It is recommended that all subclasses override this method.
The toString method for class Object
returns a string consisting of the name of the class of which the
object is an instance, the at-sign character `@', and
the unsigned hexadecimal representation of the hash code of the
object. In other words, this method returns a string equal to the
value of:
getClass().getName() + '@' + Integer.toHexString(hashCode())
| Returns | |
|---|---|
String |
a string representation of the object. |
writeToParcel
public void writeToParcel (Parcel dest, int flags)
Flatten this object in to a Parcel.
| Parameters | |
|---|---|
dest |
Parcel: This value cannot be null. |
flags |
int: Additional flags about how the object should be written.
May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE.
Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES |

