# TrackChangeEvent
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
# TrackChangeEvent
*** ** * ** ***
Kotlin\|[Java](https://developer.android.com/reference/android/media/metrics/TrackChangeEvent "View this page in Java")
```
class TrackChangeEvent : Event, Parcelable
```
|---|---|----------------------------------------------------------------------------------------------------------------------------------|
| [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) |||
| ↳ | [android.media.metrics.Event](https://developer.android.com/reference/kotlin/android/media/metrics/Event) ||
| | ↳ | [android.media.metrics.TrackChangeEvent](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#) |
Playback track change event.
## Summary
| Nested classes ||
|---|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| | [Builder](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent.Builder) A builder for[TrackChangeEvent](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#) |
| Constants ||
|----------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_CHANGE_REASON_ADAPTIVE](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_ADAPTIVE:kotlin.Int) Track change reason for adaptive changes. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_CHANGE_REASON_INITIAL](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_INITIAL:kotlin.Int) Track change reason for initial state. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_CHANGE_REASON_MANUAL](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_MANUAL:kotlin.Int) Track change reason for manual changes. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_CHANGE_REASON_OTHER](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_OTHER:kotlin.Int) Other track change reason. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_CHANGE_REASON_UNKNOWN](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_UNKNOWN:kotlin.Int) Unknown track change reason. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_STATE_OFF](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_STATE_OFF:kotlin.Int) The track is off. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_STATE_ON](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_STATE_ON:kotlin.Int) The track is on. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_TYPE_AUDIO](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_AUDIO:kotlin.Int) Audio track. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_TYPE_TEXT](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_TEXT:kotlin.Int) Text track. |
| static[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [TRACK_TYPE_VIDEO](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_VIDEO:kotlin.Int) Video track. |
| Inherited constants ||
|---|---|
| From class[Parcelable](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#) |----------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [CONTENTS_FILE_DESCRIPTOR](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#CONTENTS_FILE_DESCRIPTOR:kotlin.Int)
Descriptor bit used with[describeContents()](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#describeContents()): indicates that the Parcelable object's flattened representation includes a file descriptor.
| | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [PARCELABLE_WRITE_RETURN_VALUE](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#PARCELABLE_WRITE_RETURN_VALUE:kotlin.Int)
Flag for use with[writeToParcel](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#writeToParcel(android.os.Parcel,%20kotlin.Int)): the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`". Some implementations may want to release resources at this point.
| ||
| Public methods ||
|------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [describeContents](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#describeContents())`()`
|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | [equals](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#equals(kotlin.Any))`(`other:` `[Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html)?`)` Indicates whether some other object is "equal to" this one. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getAudioSampleRate](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getAudioSampleRate())`()` Gets audio sample rate. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getBitrate](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getBitrate())`()` Gets bitrate. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getChannelCount](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getChannelCount())`()` Gets channel count. |
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | [getCodecName](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getCodecName())`()` Gets codec name. |
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | [getContainerMimeType](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getContainerMimeType())`()` Gets container MIME type. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getHeight](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getHeight())`()` Gets video height. |
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | [getLanguage](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getLanguage())`()` Gets language code. |
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | [getLanguageRegion](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getLanguageRegion())`()` Gets language region code. |
| [Bundle](https://developer.android.com/reference/kotlin/android/os/Bundle.html#) | [getMetricsBundle](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getMetricsBundle())`()` Gets metrics-related information that is not supported by dedicated methods. |
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | [getSampleMimeType](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getSampleMimeType())`()` Gets the MIME type of the video/audio/text samples. |
| [Long](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html) | [getTimeSinceCreatedMillis](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getTimeSinceCreatedMillis())`()` Gets timestamp since the creation of the log session in milliseconds. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getTrackChangeReason](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getTrackChangeReason())`()` Gets track change reason. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getTrackState](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getTrackState())`()` Gets track state. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getTrackType](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getTrackType())`()` Gets the track type. |
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | [getVideoFrameRate](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getVideoFrameRate())`()` Gets video frame rate. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [getWidth](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#getWidth())`()` Gets video width. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | [hashCode](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#hashCode())`()`
|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) | [toString](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#toString())`()`
|
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | [writeToParcel](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#writeToParcel(android.os.Parcel,%20kotlin.Int))`(`dest:` `[Parcel](https://developer.android.com/reference/kotlin/android/os/Parcel.html#)`, `flags:` `[Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)`)` Flatten this object in to a Parcel. |
| Properties ||
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|
| static[Parcelable.Creator](https://developer.android.com/reference/kotlin/android/os/Parcelable.Creator.html#)\<[TrackChangeEvent](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#)!\> | [CREATOR](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#CREATOR:android.os.Parcelable.Creator)
|
## Constants
### TRACK_CHANGE_REASON_ADAPTIVE
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_CHANGE_REASON_ADAPTIVE: Int
```
Track change reason for adaptive changes.
Value: 4
### TRACK_CHANGE_REASON_INITIAL
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_CHANGE_REASON_INITIAL: Int
```
Track change reason for initial state.
Value: 2
### TRACK_CHANGE_REASON_MANUAL
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_CHANGE_REASON_MANUAL: Int
```
Track change reason for manual changes.
Value: 3
### TRACK_CHANGE_REASON_OTHER
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_CHANGE_REASON_OTHER: Int
```
Other track change reason.
Value: 1
### TRACK_CHANGE_REASON_UNKNOWN
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_CHANGE_REASON_UNKNOWN: Int
```
Unknown track change reason.
Value: 0
### TRACK_STATE_OFF
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_STATE_OFF: Int
```
The track is off.
Value: 0
### TRACK_STATE_ON
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_STATE_ON: Int
```
The track is on.
Value: 1
### TRACK_TYPE_AUDIO
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_TYPE_AUDIO: Int
```
Audio track.
Value: 0
### TRACK_TYPE_TEXT
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_TYPE_TEXT: Int
```
Text track.
Value: 2
### TRACK_TYPE_VIDEO
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val TRACK_TYPE_VIDEO: Int
```
Video track.
Value: 1
## Public methods
### describeContents
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun describeContents(): Int
```
| Return ||
|----------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either`0`or[android.os.Parcelable#CONTENTS_FILE_DESCRIPTOR](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#CONTENTS_FILE_DESCRIPTOR:kotlin.Int) |
### equals
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun equals(other: Any?): Boolean
```
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 return`true`.
- It is*symmetric* : for any non-null reference values`x`and`y`,`x.equals(y)`should return`true`if and only if`y.equals(x)`returns`true`.
- It is*transitive* : for any non-null reference values`x`,`y`, and`z`, if`x.equals(y)`returns`true`and`y.equals(z)`returns`true`, then`x.equals(z)`should return`true`.
- It is*consistent* : for any non-null reference values`x`and`y`, multiple invocations of`x.equals(y)`consistently return`true`or consistently return`false`, provided no information used in`equals`comparisons on the objects is modified.
- For any non-null reference value`x`,`x.equals(null)`should return`false`.
An equivalence relation partitions the elements it operates on into*equivalence classes*; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.
| Parameters ||
|-------|---------------------------------------------|
| `obj` | the reference object with which to compare. |
| `o` | This value may be`null`. |
| Return ||
|------------------------------------------------------------------------------------|------------------------------------------------------------------------|
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `true`if this object is the same as the obj argument;`false`otherwise. |
### getAudioSampleRate
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getAudioSampleRate(): Int
```
Gets audio sample rate.
| Return ||
|----------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | the sample rate, or -1 if unknown. Value is between -1 and[java.lang.Integer#MAX_VALUE](https://developer.android.com/reference/kotlin/java/lang/Integer.html#MAX_VALUE:kotlin.Int)inclusive |
### getBitrate
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getBitrate(): Int
```
Gets bitrate.
| Return ||
|----------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | the bitrate, or -1 if unknown. Value is between -1 and[java.lang.Integer#MAX_VALUE](https://developer.android.com/reference/kotlin/java/lang/Integer.html#MAX_VALUE:kotlin.Int)inclusive |
### getChannelCount
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getChannelCount(): Int
```
Gets channel count.
| Return ||
|----------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | the channel count, or -1 if unknown. Value is between -1 and[java.lang.Integer#MAX_VALUE](https://developer.android.com/reference/kotlin/java/lang/Integer.html#MAX_VALUE:kotlin.Int)inclusive |
### getCodecName
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getCodecName(): String?
```
Gets codec name.
| Return ||
|-----------------------------------------------------------------------------------|--------------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | This value may be`null`. |
### getContainerMimeType
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getContainerMimeType(): String?
```
Gets container MIME type.
| Return ||
|-----------------------------------------------------------------------------------|--------------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | This value may be`null`. |
### getHeight
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getHeight(): Int
```
Gets video height.
| Return ||
|----------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | the video height, or -1 if unknown. Value is between -1 and[java.lang.Integer#MAX_VALUE](https://developer.android.com/reference/kotlin/java/lang/Integer.html#MAX_VALUE:kotlin.Int)inclusive |
### getLanguage
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getLanguage(): String?
```
Gets language code.
| Return ||
|-----------------------------------------------------------------------------------|----------------------------------------------------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | a two-letter ISO 639-1 language code. This value may be`null`. |
### getLanguageRegion
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getLanguageRegion(): String?
```
Gets language region code.
| Return ||
|-----------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | an IETF BCP 47 optional language region subtag based on a two-letter country code. This value may be`null`. |
### getMetricsBundle
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getMetricsBundle(): Bundle
```
Gets metrics-related information that is not supported by dedicated methods.
It is intended to be used for backwards compatibility by the metrics infrastructure.
| Return ||
|----------------------------------------------------------------------------------|-----------------------------|
| [Bundle](https://developer.android.com/reference/kotlin/android/os/Bundle.html#) | This value cannot be`null`. |
### getSampleMimeType
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getSampleMimeType(): String?
```
Gets the MIME type of the video/audio/text samples.
| Return ||
|-----------------------------------------------------------------------------------|--------------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? | This value may be`null`. |
### getTimeSinceCreatedMillis
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getTimeSinceCreatedMillis(): Long
```
Gets timestamp since the creation of the log session in milliseconds.
| Return ||
|------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------|
| [Long](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-long/index.html) | the timestamp since the creation in milliseconds, or -1 if unknown. Value is -1 or greater |
**See Also**
- [android.media.metrics.LogSessionId](https://developer.android.com/reference/kotlin/android/media/metrics/LogSessionId)
- [android.media.metrics.PlaybackSession](https://developer.android.com/reference/kotlin/android/media/metrics/PlaybackSession)
- [android.media.metrics.RecordingSession](https://developer.android.com/reference/kotlin/android/media/metrics/RecordingSession)
### getTrackChangeReason
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getTrackChangeReason(): Int
```
Gets track change reason.
| Return ||
|----------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | Value is[android.media.metrics.TrackChangeEvent#TRACK_CHANGE_REASON_UNKNOWN](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_UNKNOWN:kotlin.Int),[android.media.metrics.TrackChangeEvent#TRACK_CHANGE_REASON_OTHER](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_OTHER:kotlin.Int),[android.media.metrics.TrackChangeEvent#TRACK_CHANGE_REASON_INITIAL](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_INITIAL:kotlin.Int),[android.media.metrics.TrackChangeEvent#TRACK_CHANGE_REASON_MANUAL](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_MANUAL:kotlin.Int), or[android.media.metrics.TrackChangeEvent#TRACK_CHANGE_REASON_ADAPTIVE](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_CHANGE_REASON_ADAPTIVE:kotlin.Int) |
### getTrackState
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getTrackState(): Int
```
Gets track state.
| Return ||
|----------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | Value is[android.media.metrics.TrackChangeEvent#TRACK_STATE_OFF](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_STATE_OFF:kotlin.Int), or[android.media.metrics.TrackChangeEvent#TRACK_STATE_ON](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_STATE_ON:kotlin.Int) |
### getTrackType
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getTrackType(): Int
```
Gets the track type.
The track type must be one of[TRACK_TYPE_AUDIO](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_AUDIO:kotlin.Int),[TRACK_TYPE_VIDEO](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_VIDEO:kotlin.Int),[TRACK_TYPE_TEXT](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_TEXT:kotlin.Int).
| Return ||
|----------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | Value is[android.media.metrics.TrackChangeEvent#TRACK_TYPE_AUDIO](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_AUDIO:kotlin.Int),[android.media.metrics.TrackChangeEvent#TRACK_TYPE_VIDEO](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_VIDEO:kotlin.Int), or[android.media.metrics.TrackChangeEvent#TRACK_TYPE_TEXT](https://developer.android.com/reference/kotlin/android/media/metrics/TrackChangeEvent#TRACK_TYPE_TEXT:kotlin.Int) |
### getVideoFrameRate
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getVideoFrameRate(): Float
```
Gets video frame rate.
| Return ||
|--------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Float](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-float/index.html) | the video frame rate, or -1 if unknown. Value is between -1.0f and[java.lang.Float#MAX_VALUE](https://developer.android.com/reference/kotlin/java/lang/Float.html#MAX_VALUE:kotlin.Float)inclusive |
### getWidth
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun getWidth(): Int
```
Gets video width.
| Return ||
|----------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | the video width, or -1 if unknown. Value is between -1 and[java.lang.Integer#MAX_VALUE](https://developer.android.com/reference/kotlin/java/lang/Integer.html#MAX_VALUE:kotlin.Int)inclusive |
### hashCode
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun hashCode(): Int
```
| Return ||
|----------------------------------------------------------------------------|------------------------------------|
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | a hash code value for this object. |
### toString
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun toString(): String
```
| Return ||
|----------------------------------------------------------------------------------|----------------------------------------|
| [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) | a string representation of the object. |
### writeToParcel
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
fun writeToParcel(
dest: Parcel,
flags: Int
): Unit
```
Flatten this object in to a Parcel.
| Parameters ||
|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `dest` | [Parcel](https://developer.android.com/reference/kotlin/android/os/Parcel.html#):This value cannot be`null`. |
| `flags` | [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html):Additional flags about how the object should be written. May be 0 or[PARCELABLE_WRITE_RETURN_VALUE](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#PARCELABLE_WRITE_RETURN_VALUE:kotlin.Int). Value is either`0`or a combination of[android.os.Parcelable#PARCELABLE_WRITE_RETURN_VALUE](https://developer.android.com/reference/kotlin/android/os/Parcelable.html#PARCELABLE_WRITE_RETURN_VALUE:kotlin.Int), and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES |
## Properties
### CREATOR
Added in[API level 31](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)
```
static val CREATOR: Parcelable.Creator
```