Added in [API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Constants](https://developer.android.com/reference/android/media/AudioTrack.MetricsConstants#constants) \| [Inherited Methods](https://developer.android.com/reference/android/media/AudioTrack.MetricsConstants#inhmethods)

# AudioTrack.MetricsConstants

*** ** * ** ***


`
public
static
final

class
AudioTrack.MetricsConstants
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.media.AudioTrack.MetricsConstants |

<br />

*** ** * ** ***

## Summary

| ### Constants ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioTrack.MetricsConstants#CHANNELMASK` *This constant was deprecated in API level 29. This does not work. Use `https://developer.android.com/reference/android/media/AudioTrack#getFormat()` and read from the returned format instead.* |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioTrack.MetricsConstants#CONTENTTYPE` Key to extract the attribute content type for this track from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value. |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioTrack.MetricsConstants#SAMPLERATE` *This constant was deprecated in API level 29. This does not work. Use `https://developer.android.com/reference/android/media/AudioTrack#getSampleRate()` instead.* |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioTrack.MetricsConstants#STREAMTYPE` Key to extract the stream type for this track from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value. |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioTrack.MetricsConstants#USAGE` Key to extract the attribute usage for this track from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||

## Constants

### CHANNELMASK

Added in [API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)   
Deprecated in [API level
29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final String CHANNELMASK
```


**This constant was deprecated
in API level 29.**   

This does not work. Use `https://developer.android.com/reference/android/media/AudioTrack#getFormat()` and read from
the returned format instead.

Key to extract the native channel mask information for this track
from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value.

The value is a `long`.

<br />

Constant Value:

"android.media.audiorecord.channelmask"


### CONTENTTYPE

Added in [API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final String CONTENTTYPE
```

Key to extract the attribute content type for this track
from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value.
The value is a `String`.

<br />

Constant Value:

"android.media.audiotrack.type"


### SAMPLERATE

Added in [API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)   
Deprecated in [API level
29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final String SAMPLERATE
```


**This constant was deprecated
in API level 29.**   

This does not work. Use `https://developer.android.com/reference/android/media/AudioTrack#getSampleRate()` instead.

Key to extract the sample rate for this track in Hz
from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value.
The value is an `int`.

<br />

Constant Value:

"android.media.audiorecord.samplerate"


### STREAMTYPE

Added in [API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final String STREAMTYPE
```

Key to extract the stream type for this track
from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value.
This value may not exist in API level `https://developer.android.com/reference/android/os/Build.VERSION_CODES#P`.
The value is a `String`.

<br />

Constant Value:

"android.media.audiotrack.streamtype"


### USAGE

Added in [API level 28](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final String USAGE
```

Key to extract the attribute usage for this track
from the `https://developer.android.com/reference/android/media/AudioTrack#getMetrics()` return value.
The value is a `String`.

<br />

Constant Value:

"android.media.audiotrack.usage"