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/AudioRecord.MetricsConstants#constants) \| [Inherited Methods](https://developer.android.com/reference/android/media/AudioRecord.MetricsConstants#inhmethods)

# AudioRecord.MetricsConstants

*** ** * ** ***


`
public
static
final

class
AudioRecord.MetricsConstants
`


`

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


`

`


`

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

<br />

*** ** * ** ***

## Summary

| ### Constants ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioRecord.MetricsConstants#CHANNELS` Key to extract the number of channels being recorded in this record track from the `https://developer.android.com/reference/android/media/AudioRecord#getMetrics()` return value. |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioRecord.MetricsConstants#ENCODING` Key to extract the audio data encoding for this track from the `https://developer.android.com/reference/android/media/AudioRecord#getMetrics()` return value. |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioRecord.MetricsConstants#LATENCY` *This constant was deprecated in API level 29. Not properly supported in the past.* |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioRecord.MetricsConstants#SAMPLERATE` Key to extract the sink sample rate for this record track in Hz from the `https://developer.android.com/reference/android/media/AudioRecord#getMetrics()` return value. |
| `https://developer.android.com/reference/java/lang/String` | `https://developer.android.com/reference/android/media/AudioRecord.MetricsConstants#SOURCE` Key to extract the source type for this track from the `https://developer.android.com/reference/android/media/AudioRecord#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

### CHANNELS

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

```
public static final String CHANNELS
```

Key to extract the number of channels being recorded in this record track
from the `https://developer.android.com/reference/android/media/AudioRecord#getMetrics()` return value.
The value is an `int`.

<br />

Constant Value:

"android.media.audiorecord.channels"


### ENCODING

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

```
public static final String ENCODING
```

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

<br />

Constant Value:

"android.media.audiorecord.encoding"


### LATENCY

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 LATENCY
```


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

Not properly supported in the past.

Key to extract the estimated latency through the recording pipeline
from the `https://developer.android.com/reference/android/media/AudioRecord#getMetrics()` return value.
This is in units of milliseconds.
The value is an `int`.

<br />

Constant Value:

"android.media.audiorecord.latency"


### SAMPLERATE

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

```
public static final String SAMPLERATE
```

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

<br />

Constant Value:

"android.media.audiorecord.samplerate"


### SOURCE

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

```
public static final String SOURCE
```

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

<br />

Constant Value:

"android.media.audiorecord.source"