Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

# BluetoothA2dp

*** ** * ** ***

```
class BluetoothA2dp : BluetoothProfile
```

|---|---|
| [kotlin.Any](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-any/index.html) ||
| ↳ | [android.bluetooth.BluetoothA2dp](https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#) |

This class provides the public APIs to control the Bluetooth A2DP profile.

BluetoothA2dp is a proxy object for controlling the Bluetooth A2DP Service via IPC. Use `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothAdapter#getProfileProxy(android.content.Context,%20android.bluetooth.BluetoothProfile.ServiceListener,%20kotlin.Int)` to get the BluetoothA2dp proxy object.

Android only supports one connected Bluetooth A2dp device at a time. Each method is protected with its appropriate permission.

## Summary

| Constants ||
|---|---|
| static [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#ACTION_CONNECTION_STATE_CHANGED:kotlin.String` Intent used to broadcast the change in connection state of the A2DP profile. |
| static [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#ACTION_PLAYING_STATE_CHANGED:kotlin.String` Intent used to broadcast the change in the Playing state of the A2DP profile. |
| static [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#EXTRA_DISCONNECTED_REASON:kotlin.String` Used as an int extra field in `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#ACTION_CONNECTION_STATE_CHANGED:kotlin.String` intents for connection failure reason. |
| static [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#STATE_NOT_PLAYING:kotlin.Int` A2DP sink device is NOT streaming music. |
| static [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#STATE_PLAYING:kotlin.Int` A2DP sink device is streaming music. |

Inherited constants From class `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile` `https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#A2DP:kotlin.Int`


Advanced Audio Distribution Profile (A2DP)

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#CSIP_SET_COORDINATOR:kotlin.Int`


Coordinated Set Identification Profile (CSIP) set coordinator

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PREVIOUS_STATE:kotlin.String`


Extra for the connection state intents of the individual profiles.

This extra represents the previous connection state of the profile of the Bluetooth device.

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PROFILE:kotlin.String`


Extra for the `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile` that the intent applies to.

This extra represents the Bluetooth profile that the intent applies to.

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_STATE:kotlin.String`


Extra for the connection state intents of the individual profiles.

This extra represents the current connection state of the profile of the Bluetooth device.

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#GATT:kotlin.Int`


Generic Attribute Profile (GATT)

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#GATT_SERVER:kotlin.Int`


Generic Attribute Profile (GATT) Server

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#HAP_CLIENT:kotlin.Int`

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#HEADSET:kotlin.Int`


Headset and Handsfree profile

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#HEALTH:kotlin.Int`


Health Profile

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#HEARING_AID:kotlin.Int`


Hearing Aid Device

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#HID_DEVICE:kotlin.Int`


Human Interface Device (HID) Device

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#LE_AUDIO:kotlin.Int`


LE Audio Device

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#SAP:kotlin.Int`


SIM Access Profile (SAP)

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTED:kotlin.Int`


The profile is in connected state

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTING:kotlin.Int`


The profile is in connecting state

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTED:kotlin.Int`


The profile is in disconnected state

<br />

`https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTING:kotlin.Int`


The profile is in disconnecting state

<br />

| Public methods ||
|---|---|
| [Unit](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-unit/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#finalize()()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. |
| [MutableList](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-list/index.html)\<[BluetoothDevice](https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice)!\>! | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#getConnectedDevices()()` Get connected devices for this specific profile. |
| [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#getConnectionState(android.bluetooth.BluetoothDevice)(device: https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice!)` Get the current connection state of the profile For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#S:kotlin.Int` or or higher, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String` permission which can be gained with `https://developer.android.com/reference/kotlin/android/app/Activity.html#requestPermissions(kotlin.Array,%20kotlin.Int)`. |
| [MutableList](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-list/index.html)\<[BluetoothDevice](https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice)!\>! | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#getDevicesMatchingConnectionStates(kotlin.IntArray)(states: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int-array/index.html!)` Get a list of devices that match any of the given connection states. |
| [MutableCollection](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-collection/index.html)\<[BluetoothCodecType](https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothCodecType)!\> | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#getSupportedCodecTypes()()` Returns the list of source codecs that are supported by the current platform. |
| [Boolean](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-boolean/index.html) | `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#isA2dpPlaying(android.bluetooth.BluetoothDevice)(device: https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice!)` Check if A2DP profile is streaming music. |

## Constants

### ACTION_CONNECTION_STATE_CHANGED

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
static val ACTION_CONNECTION_STATE_CHANGED: String
```

Intent used to broadcast the change in connection state of the A2DP profile.

This intent will have the following extras:

- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_STATE:kotlin.String` - The current state of the profile.
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PREVIOUS_STATE:kotlin.String`- The previous state of the profile.
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice#EXTRA_DEVICE:kotlin.String` - The remote device.
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#EXTRA_DISCONNECTED_REASON:kotlin.String` - The reason for the profile disconnection in case the new state is `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTED:kotlin.Int`.
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice#EXTRA_CLASS:kotlin.String` - The class of the remote device, if available, when the new state is `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTED:kotlin.Int`.
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice#EXTRA_LE_APPEARANCE:kotlin.String` - The LE appearance of the remote device, if available, when the new state is `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTED:kotlin.Int`.

`https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_STATE:kotlin.String` or `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PREVIOUS_STATE:kotlin.String` can be any of `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTED:kotlin.Int`, `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTING:kotlin.Int`, `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTED:kotlin.Int`, `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTING:kotlin.Int`.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#R:kotlin.Int` or lower, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH:kotlin.String` permission which can be gained with a simple `<uses-permission>` manifest tag.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#S:kotlin.Int` or or higher, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String` permission which can be gained with `https://developer.android.com/reference/kotlin/android/app/Activity.html#requestPermissions(kotlin.Array,%20kotlin.Int)`.   
Requires `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String`

    Value: "android.bluetooth.a2dp.profile.action.CONNECTION_STATE_CHANGED"

### ACTION_PLAYING_STATE_CHANGED

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
static val ACTION_PLAYING_STATE_CHANGED: String
```

Intent used to broadcast the change in the Playing state of the A2DP profile.

This intent will have 3 extras:

- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_STATE:kotlin.String` - The current state of the profile.
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PREVIOUS_STATE:kotlin.String`- The previous state of the profile.
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice#EXTRA_DEVICE:kotlin.String` - The remote device.

`https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_STATE:kotlin.String` or `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PREVIOUS_STATE:kotlin.String` can be any of `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#STATE_PLAYING:kotlin.Int`, `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#STATE_NOT_PLAYING:kotlin.Int`,.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#R:kotlin.Int` or lower, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH:kotlin.String` permission which can be gained with a simple `<uses-permission>` manifest tag.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#S:kotlin.Int` or or higher, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String` permission which can be gained with `https://developer.android.com/reference/kotlin/android/app/Activity.html#requestPermissions(kotlin.Array,%20kotlin.Int)`.   
Requires `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String`

    Value: "android.bluetooth.a2dp.profile.action.PLAYING_STATE_CHANGED"

### EXTRA_DISCONNECTED_REASON

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
static val EXTRA_DISCONNECTED_REASON: String
```

Used as an int extra field in `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#ACTION_CONNECTION_STATE_CHANGED:kotlin.String` intents for connection failure reason. The value is one of

- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothStatusCodes#SUCCESS:kotlin.Int`,
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothStatusCodes#ERROR_UNKNOWN:kotlin.Int`,
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothStatusCodes#ERROR_INSUFFICIENT_RESOURCES:kotlin.Int`,
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothStatusCodes#ERROR_SDP_DISCOVERY_FAILED:kotlin.Int`,
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothStatusCodes#ERROR_STREAM_CONNECTION_FAILED:kotlin.Int`,
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothStatusCodes#ERROR_ROLE_SWITCH_FAILED:kotlin.Int`,
- `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothStatusCodes#ERROR_AVDTP_DISCOVERY_FAILED:kotlin.Int`.

<br />

    Value: "android.bluetooth.a2dp.extra.DISCONNECTED_REASON"

### STATE_NOT_PLAYING

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
static val STATE_NOT_PLAYING: Int
```

A2DP sink device is NOT streaming music. This state can be one of `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_STATE:kotlin.String` or `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PREVIOUS_STATE:kotlin.String` of `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#ACTION_PLAYING_STATE_CHANGED:kotlin.String` intent.

    Value: 11

### STATE_PLAYING

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
static val STATE_PLAYING: Int
```

A2DP sink device is streaming music. This state can be one of `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_STATE:kotlin.String` or `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#EXTRA_PREVIOUS_STATE:kotlin.String` of `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothA2dp#ACTION_PLAYING_STATE_CHANGED:kotlin.String` intent.

    Value: 10

## Public methods

### finalize

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
fun finalize(): Unit
```

Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. A subclass overrides the `finalize` method to dispose of system resources or to perform other cleanup.

The general contract of `finalize` is that it is invoked if and when the Java virtual machine has determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, except as a result of an action taken by the finalization of some other object or class which is ready to be finalized. The `finalize` method may take any action, including making this object available again to other threads; the usual purpose of `finalize`, however, is to perform cleanup actions before the object is irrevocably discarded. For example, the finalize method for an object that represents an input/output connection might perform explicit I/O transactions to break the connection before the object is permanently discarded.

The `finalize` method of class `Object` performs no special action; it simply returns normally. Subclasses of `Object` may override this definition.

The Java programming language does not guarantee which thread will invoke the `finalize` method for any given object. It is guaranteed, however, that the thread that invokes finalize will not be holding any user-visible synchronization locks when finalize is invoked. If an uncaught exception is thrown by the finalize method, the exception is ignored and finalization of that object terminates.

After the `finalize` method has been invoked for an object, no further action is taken until the Java virtual machine has again determined that there is no longer any means by which this object can be accessed by any thread that has not yet died, including possible actions by other objects or classes which are ready to be finalized, at which point the object may be discarded.

The `finalize` method is never invoked more than once by a Java virtual machine for any given object.

Any exception thrown by the `finalize` method causes the finalization of this object to be halted, but is otherwise ignored.

| Exceptions ||
|---|---|
| `java.lang.Throwable` | the `Exception` raised by this method |

### getConnectedDevices

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
fun getConnectedDevices(): MutableList<BluetoothDevice!>!
```

Get connected devices for this specific profile.

Return the set of devices which are in state `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTED:kotlin.Int`   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#S:kotlin.Int` or or higher, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String` permission which can be gained with `https://developer.android.com/reference/kotlin/android/app/Activity.html#requestPermissions(kotlin.Array,%20kotlin.Int)`.   
Requires `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String`

| Return ||
|---|---|
| `https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-list/index.html<https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice!>!` | List of devices. The list will be empty on error. |

### getConnectionState

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
fun getConnectionState(device: BluetoothDevice!): Int
```

Get the current connection state of the profile   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#S:kotlin.Int` or or higher, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String` permission which can be gained with `https://developer.android.com/reference/kotlin/android/app/Activity.html#requestPermissions(kotlin.Array,%20kotlin.Int)`.   
Requires `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String`

| Parameters ||
|---|---|
| `device` | [BluetoothDevice](https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice)!: Remote bluetooth device. |

| Return ||
|---|---|
| `https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html` | Value is one of the following: - `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTED:kotlin.Int` - `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTING:kotlin.Int` - `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTED:kotlin.Int` - `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTING:kotlin.Int` |

### getDevicesMatchingConnectionStates

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
fun getDevicesMatchingConnectionStates(states: IntArray!): MutableList<BluetoothDevice!>!
```

Get a list of devices that match any of the given connection states.

If none of the devices match any of the given states, an empty list will be returned.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#S:kotlin.Int` or or higher, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String` permission which can be gained with `https://developer.android.com/reference/kotlin/android/app/Activity.html#requestPermissions(kotlin.Array,%20kotlin.Int)`.   
Requires `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String`

| Parameters ||
|---|---|
| `states` | [IntArray](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int-array/index.html)!: Array of states. States can be one of `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTED:kotlin.Int`, `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_CONNECTING:kotlin.Int`, `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTED:kotlin.Int`, `https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothProfile#STATE_DISCONNECTING:kotlin.Int`, |

| Return ||
|---|---|
| `https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-list/index.html<https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice!>!` | List of devices. The list will be empty on error. |

### getSupportedCodecTypes

Added in [API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
fun getSupportedCodecTypes(): MutableCollection<BluetoothCodecType!>
```

Returns the list of source codecs that are supported by the current platform.

The list always includes the mandatory SBC codec, and may include optional proprietary codecs.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#R:kotlin.Int` or lower, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH:kotlin.String` permission which can be gained with a simple `<uses-permission>` manifest tag.   
Requires `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_PRIVILEGED:kotlin.String`

| Return ||
|---|---|
| `https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-collection/index.html<https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothCodecType!>` | list of supported source codec types. This value cannot be `null`. |

### isA2dpPlaying

Added in [API level 11](https://developer.android.com/guide/topics/manifest/uses-sdk-element.html#ApiLevels)

```
fun isA2dpPlaying(device: BluetoothDevice!): Boolean
```

Check if A2DP profile is streaming music.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#R:kotlin.Int` or lower, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH:kotlin.String` permission which can be gained with a simple `<uses-permission>` manifest tag.   
For apps targeting `https://developer.android.com/reference/kotlin/android/os/Build.VERSION_CODES.html#S:kotlin.Int` or or higher, this requires the `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String` permission which can be gained with `https://developer.android.com/reference/kotlin/android/app/Activity.html#requestPermissions(kotlin.Array,%20kotlin.Int)`.   
Requires `https://developer.android.com/reference/kotlin/android/Manifest.permission.html#BLUETOOTH_CONNECT:kotlin.String`

| Parameters ||
|---|---|
| `device` | [BluetoothDevice](https://developer.android.com/reference/kotlin/android/bluetooth/BluetoothDevice)!: BluetoothDevice device |