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Summary: Constants | Methods | Inherited Methods

AudioDeviceInfo

public final class AudioDeviceInfo
extends Object

java.lang.Object
↳	android.media.AudioDeviceInfo

Class to provide information about the audio devices.

Summary

Constants
`int`	`TYPE_AUX_LINE` A device type describing the auxiliary line-level connectors.
`int`	`TYPE_BLUETOOTH_A2DP` A device type describing a Bluetooth device supporting the A2DP profile.
`int`	`TYPE_BLUETOOTH_SCO` A device type describing a Bluetooth device typically used for telephony.
`int`	`TYPE_BUILTIN_EARPIECE` A device type describing the attached earphone speaker.
`int`	`TYPE_BUILTIN_MIC` A device type describing the microphone(s) built in a device.
`int`	`TYPE_BUILTIN_SPEAKER` A device type describing the speaker system (i.e.
`int`	`TYPE_BUILTIN_SPEAKER_SAFE` A device type describing the speaker system (i.e.
`int`	`TYPE_BUS` A type-agnostic device used for communication with external audio systems
`int`	`TYPE_DOCK` A device type describing the audio device associated with a dock.
`int`	`TYPE_FM` A device type associated with the transmission of audio signals over FM.
`int`	`TYPE_FM_TUNER` A device type for accessing the audio content transmitted over FM.
`int`	`TYPE_HDMI` A device type describing an HDMI connection .
`int`	`TYPE_HDMI_ARC` A device type describing the Audio Return Channel of an HDMI connection.
`int`	`TYPE_HEARING_AID` A device type describing a Hearing Aid.
`int`	`TYPE_IP` A device type connected over IP.
`int`	`TYPE_LINE_ANALOG` A device type describing an analog line-level connection.
`int`	`TYPE_LINE_DIGITAL` A device type describing a digital line connection (e.g. SPDIF).
`int`	`TYPE_TELEPHONY` A device type describing the transmission of audio signals over the telephony network.
`int`	`TYPE_TV_TUNER` A device type for accessing the audio content transmitted over the TV tuner system.
`int`	`TYPE_UNKNOWN` A device type associated with an unknown or uninitialized device.
`int`	`TYPE_USB_ACCESSORY` A device type describing a USB audio device in accessory mode.
`int`	`TYPE_USB_DEVICE` A device type describing a USB audio device.
`int`	`TYPE_USB_HEADSET` A device type describing a USB audio headset.
`int`	`TYPE_WIRED_HEADPHONES` A device type describing a pair of wired headphones.
`int`	`TYPE_WIRED_HEADSET` A device type describing a headset, which is the combination of a headphones and microphone.

Public methods
`boolean`	`equals(Object o)` Indicates whether some other object is "equal to" this one.
`String`	`getAddress()`
`int[]`	`getChannelCounts()`
`int[]`	`getChannelIndexMasks()`
`int[]`	`getChannelMasks()`
`int[]`	`getEncapsulationMetadataTypes()` Returns an array of supported encapsulation metadata types for the device.
`int[]`	`getEncapsulationModes()` Returns an array of supported encapsulation modes for the device.
`int[]`	`getEncodings()`
`int`	`getId()`
`CharSequence`	`getProductName()`
`int[]`	`getSampleRates()`
`int`	`getType()`
`int`	`hashCode()` Returns a hash code value for the object.
`boolean`	`isSink()`
`boolean`	`isSource()`

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Constants

TYPE_AUX_LINE

public static final int TYPE_AUX_LINE

A device type describing the auxiliary line-level connectors.

Constant Value: 19 (0x00000013)

TYPE_BLUETOOTH_A2DP

public static final int TYPE_BLUETOOTH_A2DP

A device type describing a Bluetooth device supporting the A2DP profile.

Constant Value: 8 (0x00000008)

TYPE_BLUETOOTH_SCO

public static final int TYPE_BLUETOOTH_SCO

A device type describing a Bluetooth device typically used for telephony.

Constant Value: 7 (0x00000007)

TYPE_BUILTIN_EARPIECE

public static final int TYPE_BUILTIN_EARPIECE

A device type describing the attached earphone speaker.

Constant Value: 1 (0x00000001)

TYPE_BUILTIN_MIC

public static final int TYPE_BUILTIN_MIC

A device type describing the microphone(s) built in a device.

Constant Value: 15 (0x0000000f)

TYPE_BUILTIN_SPEAKER

public static final int TYPE_BUILTIN_SPEAKER

A device type describing the speaker system (i.e. a mono speaker or stereo speakers) built in a device.

Constant Value: 2 (0x00000002)

TYPE_BUILTIN_SPEAKER_SAFE

public static final int TYPE_BUILTIN_SPEAKER_SAFE

A device type describing the speaker system (i.e. a mono speaker or stereo speakers) built in a device, that is specifically tuned for outputting sounds like notifications and alarms (i.e. sounds the user couldn't necessarily anticipate).

Note that this physical audio device may be the same as TYPE_BUILTIN_SPEAKER but is driven differently to safely accommodate the different use case.

Constant Value: 24 (0x00000018)

TYPE_BUS

public static final int TYPE_BUS

A type-agnostic device used for communication with external audio systems

Constant Value: 21 (0x00000015)

TYPE_DOCK

public static final int TYPE_DOCK

A device type describing the audio device associated with a dock.

Constant Value: 13 (0x0000000d)

TYPE_FM

public static final int TYPE_FM

A device type associated with the transmission of audio signals over FM.

Constant Value: 14 (0x0000000e)

TYPE_FM_TUNER

public static final int TYPE_FM_TUNER

A device type for accessing the audio content transmitted over FM.

Constant Value: 16 (0x00000010)

TYPE_HDMI

public static final int TYPE_HDMI

A device type describing an HDMI connection .

Constant Value: 9 (0x00000009)

TYPE_HDMI_ARC

public static final int TYPE_HDMI_ARC

A device type describing the Audio Return Channel of an HDMI connection.

Constant Value: 10 (0x0000000a)

TYPE_HEARING_AID

public static final int TYPE_HEARING_AID

A device type describing a Hearing Aid.

Constant Value: 23 (0x00000017)

TYPE_IP

public static final int TYPE_IP

A device type connected over IP.

Constant Value: 20 (0x00000014)

TYPE_LINE_ANALOG

public static final int TYPE_LINE_ANALOG

A device type describing an analog line-level connection.

Constant Value: 5 (0x00000005)

TYPE_LINE_DIGITAL

public static final int TYPE_LINE_DIGITAL

A device type describing a digital line connection (e.g. SPDIF).

Constant Value: 6 (0x00000006)

TYPE_TELEPHONY

public static final int TYPE_TELEPHONY

A device type describing the transmission of audio signals over the telephony network.

Constant Value: 18 (0x00000012)

TYPE_TV_TUNER

public static final int TYPE_TV_TUNER

A device type for accessing the audio content transmitted over the TV tuner system.

Constant Value: 17 (0x00000011)

TYPE_UNKNOWN

public static final int TYPE_UNKNOWN

A device type associated with an unknown or uninitialized device.

Constant Value: 0 (0x00000000)

TYPE_USB_ACCESSORY

public static final int TYPE_USB_ACCESSORY

A device type describing a USB audio device in accessory mode.

Constant Value: 12 (0x0000000c)

TYPE_USB_DEVICE

public static final int TYPE_USB_DEVICE

A device type describing a USB audio device.

Constant Value: 11 (0x0000000b)

TYPE_USB_HEADSET

public static final int TYPE_USB_HEADSET

A device type describing a USB audio headset.

Constant Value: 22 (0x00000016)

TYPE_WIRED_HEADPHONES

public static final int TYPE_WIRED_HEADPHONES

A device type describing a pair of wired headphones.

Constant Value: 4 (0x00000004)

TYPE_WIRED_HEADSET

public static final int TYPE_WIRED_HEADSET

A device type describing a headset, which is the combination of a headphones and microphone.

Constant Value: 3 (0x00000003)

Public methods

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 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.

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.

getAddress

public String getAddress ()

Returns
`String`	The "address" string of the device. This generally contains device-specific parameters. This value cannot be `null`.

getChannelCounts

public int[] getChannelCounts ()

Returns
`int[]`	An array of channel counts (1, 2, 4, ...) for which this audio device can be configured. Note: an empty array indicates that the device supports arbitrary channel counts. This value cannot be `null`.

getChannelIndexMasks

public int[] getChannelIndexMasks ()

Returns
`int[]`	An array of channel index masks for which this audio device can be configured. This value cannot be `null`.

See also:

Note: an empty array indicates that the device supports arbitrary channel index masks.

getChannelMasks

public int[] getChannelMasks ()

Returns
`int[]`	An array of channel position masks (e.g. `AudioFormat#CHANNEL_IN_STEREO`, `AudioFormat#CHANNEL_OUT_7POINT1`) for which this audio device can be configured. This value cannot be `null`.

See also:

Note: an empty array indicates that the device supports arbitrary channel masks.

getEncapsulationMetadataTypes

public int[] getEncapsulationMetadataTypes ()

Returns an array of supported encapsulation metadata types for the device. The metadata type returned should be allowed for all encapsulation modes supported by the device. Some metadata types may apply only to certain compressed stream formats, the returned list is the union of subsets. The array can include any of AudioTrack#ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER, AudioTrack#ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR.

Returns
`int[]`	An array of supported encapsulation metadata types for the device. This may be an empty array if no metadata types are supported. This value cannot be `null`. Value is android.media.AudioTrack.ENCAPSULATION_METADATA_TYPE_NONE, `AudioTrack.ENCAPSULATION_METADATA_TYPE_FRAMEWORK_TUNER`, or `AudioTrack.ENCAPSULATION_METADATA_TYPE_DVB_AD_DESCRIPTOR`

getEncapsulationModes

public int[] getEncapsulationModes ()

Returns an array of supported encapsulation modes for the device. The array can include any of the AudioTrack encapsulation modes, e.g. AudioTrack#ENCAPSULATION_MODE_ELEMENTARY_STREAM.

Returns
`int[]`	An array of supported encapsulation modes for the device. This may be an empty array if no encapsulation modes are supported. This value cannot be `null`. Value is `AudioTrack.ENCAPSULATION_MODE_NONE`, or `AudioTrack.ENCAPSULATION_MODE_ELEMENTARY_STREAM`

getEncodings

public int[] getEncodings ()

Returns

Returns
`int[]`	An array of audio encodings (e.g. `AudioFormat#ENCODING_PCM_16BIT`, `AudioFormat#ENCODING_PCM_FLOAT`) supported by the audio device. `ENCODING_PCM_FLOAT` indicates the device supports more than 16 bits of integer precision. As there is no AudioFormat constant specifically defined for 24-bit PCM, the value `ENCODING_PCM_FLOAT` indicates that `AudioTrack` or `AudioRecord` can preserve at least 24 bits of integer precision to that device. This value cannot be `null`.

int[]

An array of audio encodings (e.g. AudioFormat#ENCODING_PCM_16BIT, AudioFormat#ENCODING_PCM_FLOAT) supported by the audio device. ENCODING_PCM_FLOAT indicates the device supports more than 16 bits of integer precision. As there is no AudioFormat constant specifically defined for 24-bit PCM, the value ENCODING_PCM_FLOAT indicates that AudioTrack or AudioRecord can preserve at least 24 bits of integer precision to that device. This value cannot be null.

See also:

Note: an empty array indicates that the device supports arbitrary encodings.

getId

public int getId ()

Returns
`int`	The internal device ID.

getProductName

public CharSequence getProductName ()

Returns
`CharSequence`	The human-readable name of the audio device.

getSampleRates

public int[] getSampleRates ()

Returns
`int[]`	An array of sample rates supported by the audio device. Note: an empty array indicates that the device supports arbitrary rates. This value cannot be `null`.

getType

public int getType ()

Returns
`int`	The device type identifier of the audio device (i.e. TYPE_BUILTIN_SPEAKER).

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 hashCode method must consistently return the same integer, provided no information used in equals comparisons 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 the hashCode method 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 the hashCode method 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. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
`int`	a hash code value for this object.

isSink

public boolean isSink ()

Returns
`boolean`	true if the audio device is a sink for audio data (i.e. an output).

isSource

public boolean isSource ()

Returns
`boolean`	true if the audio device is a source for audio data (e.e an input).