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Summary: Nested Classes | Constants | Methods | Inherited Methods

# AudioManager

`public class AudioManager`
`extends Object` ``

java.lang.Object
↳ | android.media.AudioManager

AudioManager provides access to volume and ringer mode control.

## Summary

### Nested classes
`class` | `AudioManager.AudioPlaybackCallback` Interface for receiving update notifications about the playback activity on the system.
`class` | `AudioManager.AudioRecordingCallback` Interface for receiving update notifications about the recording configuration.
`interface` | `AudioManager.OnAudioFocusChangeListener` Interface definition for a callback to be invoked when the audio focus of the system is updated.
`interface` | `AudioManager.OnCommunicationDeviceChangedListener` Listener registered by client to be notified upon communication audio device change.
`interface` | `AudioManager.OnModeChangedListener` Interface definition of a callback that is notified when the audio mode changes

### Constants
`String` | `ACTION_AUDIO_BECOMING_NOISY` Broadcast intent, a hint for applications that audio is about to become 'noisy' due to a change in audio outputs.
`String` | `ACTION_HDMI_AUDIO_PLUG` Broadcast Action: A sticky broadcast indicating an HDMI cable was plugged or unplugged.
`String` | `ACTION_HEADSET_PLUG` Broadcast Action: Wired Headset plugged in or unplugged.
`String` | `ACTION_MICROPHONE_MUTE_CHANGED` Broadcast Action: microphone muting state changed.
`String` | `ACTION_SCO_AUDIO_STATE_CHANGED` This constant is deprecated. Use `ACTION_SCO_AUDIO_STATE_UPDATED` instead
`String` | `ACTION_SCO_AUDIO_STATE_UPDATED` Sticky broadcast intent action indicating that the Bluetooth SCO audio connection state has been updated.
`String` | `ACTION_SPEAKERPHONE_STATE_CHANGED` Broadcast Action: speakerphone state changed.
`int` | `ADJUST_LOWER` Decrease the ringer volume.
`int` | `ADJUST_MUTE` Mute the volume.
`int` | `ADJUST_RAISE` Increase the ringer volume.
`int` | `ADJUST_SAME` Maintain the previous ringer volume.
`int` | `ADJUST_TOGGLE_MUTE` Toggle the mute state.
`int` | `ADJUST_UNMUTE` Unmute the volume.
`int` | `AUDIOFOCUS_GAIN` Used to indicate a gain of audio focus, or a request of audio focus, of unknown duration.
`int` | `AUDIOFOCUS_GAIN_TRANSIENT` Used to indicate a temporary gain or request of audio focus, anticipated to last a short amount of time.
`int` | `AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE` Used to indicate a temporary request of audio focus, anticipated to last a short amount of time, during which no other applications, or system components, should play anything.
`int` | `AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK` Used to indicate a temporary request of audio focus, anticipated to last a short amount of time, and where it is acceptable for other audio applications to keep playing after having lowered their output level (also referred to as "ducking").
`int` | `AUDIOFOCUS_LOSS` Used to indicate a loss of audio focus of unknown duration.
`int` | `AUDIOFOCUS_LOSS_TRANSIENT` Used to indicate a transient loss of audio focus.
`int` | `AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK` Used to indicate a transient loss of audio focus where the loser of the audio focus can lower its output volume if it wants to continue playing (also referred to as "ducking"), as the new focus owner doesn't require others to be silent.
`int` | `AUDIOFOCUS_NONE` Used to indicate no audio focus has been gained or lost, or requested.
`int` | `AUDIOFOCUS_REQUEST_DELAYED` A focus change request whose granting is delayed: the request was successful, but the requester will only be granted audio focus once the condition that prevented immediate granting has ended.
`int` | `AUDIOFOCUS_REQUEST_FAILED` A failed focus change request.
`int` | `AUDIOFOCUS_REQUEST_GRANTED` A successful focus change request.
`int` | `AUDIO_SESSION_ID_GENERATE` A special audio session ID to indicate that the audio session ID isn't known and the framework should generate a new value.
`int` | `ENCODED_SURROUND_OUTPUT_ALWAYS` The surround sound formats are ALWAYS available, even if they are not detected by the hardware.
`int` | `ENCODED_SURROUND_OUTPUT_AUTO` The surround sound formats are available for use if they are detected.
`int` | `ENCODED_SURROUND_OUTPUT_MANUAL` Surround sound formats are available according to the choice of user, even if they are not detected by the hardware.
`int` | `ENCODED_SURROUND_OUTPUT_NEVER` The surround sound formats are NEVER available, even if they are detected by the hardware.
`int` | `ENCODED_SURROUND_OUTPUT_UNKNOWN` The mode for surround sound formats is unknown.
`int` | `ERROR` A default error code.
`int` | `ERROR_DEAD_OBJECT` An error code indicating that the object reporting it is no longer valid and needs to be recreated.
`String` | `EXTRA_AUDIO_PLUG_STATE` Extra used in `ACTION_HDMI_AUDIO_PLUG` to communicate whether HDMI is plugged in or unplugged.
`String` | `EXTRA_ENCODINGS` Extra used in `ACTION_HDMI_AUDIO_PLUG` to define the audio encodings supported by the connected HDMI device.
`String` | `EXTRA_MAX_CHANNEL_COUNT` Extra used in `ACTION_HDMI_AUDIO_PLUG` to define the maximum number of channels supported by the HDMI device.
`String` | `EXTRA_RINGER_MODE` The new ringer mode.
`String` | `EXTRA_SCO_AUDIO_PREVIOUS_STATE` Extra for intent `ACTION_SCO_AUDIO_STATE_UPDATED` containing the previous bluetooth SCO connection state.
`String` | `EXTRA_SCO_AUDIO_STATE` Extra for intent `ACTION_SCO_AUDIO_STATE_CHANGED` or `ACTION_SCO_AUDIO_STATE_UPDATED` containing the new bluetooth SCO connection state.
`String` | `EXTRA_VIBRATE_SETTING` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode and listen to `RINGER_MODE_CHANGED_ACTION` instead.
`String` | `EXTRA_VIBRATE_TYPE` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode and listen to `RINGER_MODE_CHANGED_ACTION` instead.
`int` | `FLAG_ALLOW_RINGER_MODES` Whether to include ringer modes as possible options when changing volume.
`int` | `FLAG_PLAY_SOUND` Whether to play a sound when changing the volume.
`int` | `FLAG_REMOVE_SOUND_AND_VIBRATE` Removes any sounds/vibrate that may be in the queue, or are playing (related to changing volume).
`int` | `FLAG_SHOW_UI` Show a toast containing the current volume.
`int` | `FLAG_VIBRATE` Whether to vibrate if going into the vibrate ringer mode.
`int` | `FX_BACK` Back sound
`int` | `FX_FOCUS_NAVIGATION_DOWN` Focus has moved down
`int` | `FX_FOCUS_NAVIGATION_LEFT` Focus has moved left
`int` | `FX_FOCUS_NAVIGATION_RIGHT` Focus has moved right
`int` | `FX_FOCUS_NAVIGATION_UP` Focus has moved up
`int` | `FX_KEYPRESS_DELETE` IME delete keypress sound
`int` | `FX_KEYPRESS_INVALID` Invalid keypress sound
`int` | `FX_KEYPRESS_RETURN` IME return_keypress sound
`int` | `FX_KEYPRESS_SPACEBAR` IME spacebar keypress sound
`int` | `FX_KEYPRESS_STANDARD` IME standard keypress sound
`int` | `FX_KEY_CLICK` Keyboard and direction pad click sound
`int` | `GET_DEVICES_ALL` Specifies to the `AudioManager#getDevices(int)` method to include both source and sink devices.
`int` | `GET_DEVICES_INPUTS` Specifies to the `AudioManager#getDevices(int)` method to include source (i.e.
`int` | `GET_DEVICES_OUTPUTS` Specifies to the `AudioManager#getDevices(int)` method to include sink (i.e.
`int` | `MODE_CALL_SCREENING` Call screening in progress.
`int` | `MODE_CURRENT` Current audio mode.
`int` | `MODE_INVALID` Invalid audio mode.
`int` | `MODE_IN_CALL` In call audio mode.
`int` | `MODE_IN_COMMUNICATION` In communication audio mode.
`int` | `MODE_NORMAL` Normal audio mode: not ringing and no call established.
`int` | `MODE_RINGTONE` Ringing audio mode.
`int` | `NUM_STREAMS` This constant is deprecated. Do not iterate on volume stream type values.
`int` | `PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED` Return value for `getPlaybackOffloadSupport(android.media.AudioFormat, android.media.AudioAttributes)`: offload playback supported with gapless transitions
`int` | `PLAYBACK_OFFLOAD_NOT_SUPPORTED` Return value for `getPlaybackOffloadSupport(android.media.AudioFormat, android.media.AudioAttributes)`: offload playback not supported
`int` | `PLAYBACK_OFFLOAD_SUPPORTED` Return value for `getPlaybackOffloadSupport(android.media.AudioFormat, android.media.AudioAttributes)`: offload playback supported
`String` | `PROPERTY_OUTPUT_FRAMES_PER_BUFFER` Used as a key for `getProperty(String)` to request the native or optimal output buffer size for this device's low latency output stream, in decimal PCM frames.
`String` | `PROPERTY_OUTPUT_SAMPLE_RATE` Used as a key for `getProperty(String)` to request the native or optimal output sample rate for this device's low latency output stream, in decimal Hz.
`String` | `PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED` Used as a key for `getProperty(String)` to determine if the unprocessed audio source is available and supported with the expected frequency range and level response.
`String` | `PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND` Used as a key for `getProperty(String)` to determine if the default microphone audio source supports near-ultrasound frequencies (range of 18 - 21 kHz).
`String` | `PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND` Used as a key for `getProperty(String)` to determine if the default speaker audio path supports near-ultrasound frequencies (range of 18 - 21 kHz).
`String` | `RINGER_MODE_CHANGED_ACTION` Sticky broadcast intent action indicating that the ringer mode has changed.
`int` | `RINGER_MODE_NORMAL` Ringer mode that may be audible and may vibrate.
`int` | `RINGER_MODE_SILENT` Ringer mode that will be silent and will not vibrate.
`int` | `RINGER_MODE_VIBRATE` Ringer mode that will be silent and will vibrate.
`int` | `ROUTE_ALL` This constant is deprecated. Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`int` | `ROUTE_BLUETOOTH` This constant is deprecated. use `ROUTE_BLUETOOTH_SCO`Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`int` | `ROUTE_BLUETOOTH_A2DP` This constant is deprecated. Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`int` | `ROUTE_BLUETOOTH_SCO` This constant is deprecated. Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`int` | `ROUTE_EARPIECE` This constant is deprecated. Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`int` | `ROUTE_HEADSET` This constant is deprecated. Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`int` | `ROUTE_SPEAKER` This constant is deprecated. Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`int` | `SCO_AUDIO_STATE_CONNECTED` Value for extra `EXTRA_SCO_AUDIO_STATE` or `EXTRA_SCO_AUDIO_PREVIOUS_STATE` indicating that the SCO audio channel is established
`int` | `SCO_AUDIO_STATE_CONNECTING` Value for extra EXTRA_SCO_AUDIO_STATE or EXTRA_SCO_AUDIO_PREVIOUS_STATE indicating that the SCO audio channel is being established
`int` | `SCO_AUDIO_STATE_DISCONNECTED` Value for extra EXTRA_SCO_AUDIO_STATE or EXTRA_SCO_AUDIO_PREVIOUS_STATE indicating that the SCO audio channel is not established
`int` | `SCO_AUDIO_STATE_ERROR` Value for extra EXTRA_SCO_AUDIO_STATE indicating that there was an error trying to obtain the state
`int` | `STREAM_ACCESSIBILITY` Used to identify the volume of audio streams for accessibility prompts
`int` | `STREAM_ALARM` Used to identify the volume of audio streams for alarms
`int` | `STREAM_DTMF` Used to identify the volume of audio streams for DTMF Tones
`int` | `STREAM_MUSIC` Used to identify the volume of audio streams for music playback
`int` | `STREAM_NOTIFICATION` Used to identify the volume of audio streams for notifications
`int` | `STREAM_RING` Used to identify the volume of audio streams for the phone ring
`int` | `STREAM_SYSTEM` Used to identify the volume of audio streams for system sounds
`int` | `STREAM_VOICE_CALL` Used to identify the volume of audio streams for phone calls
`int` | `USE_DEFAULT_STREAM_TYPE` Suggests using the default stream type.
`String` | `VIBRATE_SETTING_CHANGED_ACTION` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode and listen to `RINGER_MODE_CHANGED_ACTION` instead.
`int` | `VIBRATE_SETTING_OFF` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.
`int` | `VIBRATE_SETTING_ON` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.
`int` | `VIBRATE_SETTING_ONLY_SILENT` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.
`int` | `VIBRATE_TYPE_NOTIFICATION` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.
`int` | `VIBRATE_TYPE_RINGER` This constant is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

### Public methods
`int` | `abandonAudioFocus(AudioManager.OnAudioFocusChangeListener l)` This method is deprecated. use `abandonAudioFocusRequest(android.media.AudioFocusRequest)`
`int` | `abandonAudioFocusRequest(AudioFocusRequest focusRequest)` Abandon audio focus.
`void` | `addOnCommunicationDeviceChangedListener(Executor executor, AudioManager.OnCommunicationDeviceChangedListener listener)` Adds a listener for being notified of changes to the communication audio device.
`void` | `addOnModeChangedListener(Executor executor, AudioManager.OnModeChangedListener listener)` Adds a listener to be notified of changes to the audio mode.
`void` | `adjustStreamVolume(int streamType, int direction, int flags)` Adjusts the volume of a particular stream by one step in a direction.
`void` | `adjustSuggestedStreamVolume(int direction, int suggestedStreamType, int flags)` Adjusts the volume of the most relevant stream, or the given fallback stream.
`void` | `adjustVolume(int direction, int flags)` Adjusts the volume of the most relevant stream.
`void` | `clearCommunicationDevice()` Cancels previous communication device selection made with `setCommunicationDevice(android.media.AudioDeviceInfo)`.
`void` | `dispatchMediaKeyEvent(KeyEvent keyEvent)` Sends a simulated key event for a media button.
`int` | `generateAudioSessionId()` Return a new audio session identifier not associated with any player or effect.
`List<AudioPlaybackConfiguration>` | `getActivePlaybackConfigurations()` Returns the current active audio playback configurations of the device
`List<AudioRecordingConfiguration>` | `getActiveRecordingConfigurations()` Returns the current active audio recording configurations of the device.
`int` | `getAllowedCapturePolicy()` Return the capture policy.
`int` | `getAudioHwSyncForSession(int sessionId)` Retrieves the Hardware A/V synchronization ID corresponding to the given audio session ID.
`List<AudioDeviceInfo>` | `getAvailableCommunicationDevices()` Returns a list of audio devices that can be selected for communication use cases via `setCommunicationDevice(android.media.AudioDeviceInfo)`.
`AudioDeviceInfo` | `getCommunicationDevice()` Returns currently selected audio device for communication.
`AudioDeviceInfo[]` | `getDevices(int flags)` Returns an array of `AudioDeviceInfo` objects corresponding to the audio devices currently connected to the system and meeting the criteria specified in the `flags` parameter.
`int` | `getEncodedSurroundMode()` Gets the surround sound mode.
`List<MicrophoneInfo>` | `getMicrophones()` Returns a list of `MicrophoneInfo` that corresponds to the characteristics of all available microphones.
`int` | `getMode()` Returns the current audio mode.
`String` | `getParameters(String keys)` Gets a variable number of parameter values from audio hardware.
`static int` | `getPlaybackOffloadSupport(AudioFormat format, AudioAttributes attributes)` Returns whether offloaded playback of an audio format is supported on the device or not and when supported whether gapless transitions are possible or not.
`String` | `getProperty(String key)` Returns the value of the property with the specified key.
`int` | `getRingerMode()` Returns the current ringtone mode.
`int` | `getRouting(int mode)` This method is deprecated. Do not query audio routing directly, use isSpeakerphoneOn(), isBluetoothScoOn(), isBluetoothA2dpOn() and isWiredHeadsetOn() methods instead.
`Spatializer` | `getSpatializer()` Return a handle to the optional platform's `Spatializer`
`int` | `getStreamMaxVolume(int streamType)` Returns the maximum volume index for a particular stream.
`int` | `getStreamMinVolume(int streamType)` Returns the minimum volume index for a particular stream.
`int` | `getStreamVolume(int streamType)` Returns the current volume index for a particular stream.
`float` | `getStreamVolumeDb(int streamType, int index, int deviceType)` Returns the volume in dB (decibel) for the given stream type at the given volume index, on the given type of audio output device.
`int` | `getVibrateSetting(int vibrateType)` This method is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.
`boolean` | `isBluetoothA2dpOn()` This method is deprecated. Use `AudioManager#getDevices(int)` instead to list available audio devices.
`boolean` | `isBluetoothScoAvailableOffCall()` Indicates if current platform supports use of SCO for off call use cases.
`boolean` | `isBluetoothScoOn()` Checks whether communications use Bluetooth SCO.
`boolean` | `isCallScreeningModeSupported()` Indicates if the platform supports a special call screening and call monitoring mode.
`static boolean` | `isHapticPlaybackSupported()` Return if audio haptic coupled playback is supported or not.
`boolean` | `isMicrophoneMute()` Checks whether the microphone mute is on or off.
`boolean` | `isMusicActive()` Checks whether any music is active.
`static boolean` | `isOffloadedPlaybackSupported(AudioFormat format, AudioAttributes attributes)` Returns whether offloaded playback of an audio format is supported on the device.
`boolean` | `isSpeakerphoneOn()` Checks whether the speakerphone is on or off.
`boolean` | `isStreamMute(int streamType)` Returns the current mute state for a particular stream.
`boolean` | `isSurroundFormatEnabled(int audioFormat)` Gets whether a certain surround format is enabled or not.
`boolean` | `isVolumeFixed()` Indicates if the device implements a fixed volume policy.
`boolean` | `isWiredHeadsetOn()` This method is deprecated. Use `AudioManager#getDevices(int)` instead to list available audio devices.
`void` | `loadSoundEffects()` Load Sound effects.
`void` | `playSoundEffect(int effectType)` Plays a sound effect (Key clicks, lid open/close...)
`void` | `playSoundEffect(int effectType, float volume)` Plays a sound effect (Key clicks, lid open/close...)
`void` | `registerAudioDeviceCallback(AudioDeviceCallback callback, Handler handler)` Registers an `AudioDeviceCallback` object to receive notifications of changes to the set of connected audio devices.
`void` | `registerAudioPlaybackCallback(AudioManager.AudioPlaybackCallback cb, Handler handler)` Register a callback to be notified of audio playback changes through `AudioPlaybackCallback`
`void` | `registerAudioRecordingCallback(AudioManager.AudioRecordingCallback cb, Handler handler)` Register a callback to be notified of audio recording changes through `AudioRecordingCallback`
`void` | `registerMediaButtonEventReceiver(ComponentName eventReceiver)` This method is deprecated. Use `MediaSession#setMediaButtonReceiver(PendingIntent)` instead.
`void` | `registerMediaButtonEventReceiver(PendingIntent eventReceiver)` This method is deprecated. Use `MediaSession#setMediaButtonReceiver(PendingIntent)` instead.
`void` | `registerRemoteControlClient(RemoteControlClient rcClient)` This method is deprecated. Use `MediaSession` instead.
`boolean` | `registerRemoteController(RemoteController rctlr)` This method is deprecated. Use `MediaSessionManager#addOnActiveSessionsChangedListener(android.media.session.MediaSessionManager.OnActiveSessionsChangedListener, ComponentName)` and `MediaController` instead.
`void` | `removeOnCommunicationDeviceChangedListener(AudioManager.OnCommunicationDeviceChangedListener listener)` Removes a previously added listener of changes to the communication audio device.
`void` | `removeOnModeChangedListener(AudioManager.OnModeChangedListener listener)` Removes a previously added listener for changes to audio mode.
`int` | `requestAudioFocus(AudioFocusRequest focusRequest)` Request audio focus.
`int` | `requestAudioFocus(AudioManager.OnAudioFocusChangeListener l, int streamType, int durationHint)` This method is deprecated. use `requestAudioFocus(android.media.AudioFocusRequest)`
`void` | `setAllowedCapturePolicy(int capturePolicy)` Specifies whether the audio played by this app may or may not be captured by other apps or the system.
`void` | `setBluetoothA2dpOn(boolean on)` This method is deprecated. Do not use.
`void` | `setBluetoothScoOn(boolean on)` Request use of Bluetooth SCO headset for communications.
`boolean` | `setCommunicationDevice(AudioDeviceInfo device)` Selects the audio device that should be used for communication use cases, for instance voice or video calls.
`boolean` | `setEncodedSurroundMode(int mode)` Sets the surround sound mode.
`void` | `setMicrophoneMute(boolean on)` Sets the microphone mute on or off.
`void` | `setMode(int mode)` Sets the audio mode.
`void` | `setParameters(String keyValuePairs)` Sets a variable number of parameter values to audio hardware.
`void` | `setRingerMode(int ringerMode)` Sets the ringer mode.
`void` | `setRouting(int mode, int routes, int mask)` This method is deprecated. Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.
`void` | `setSpeakerphoneOn(boolean on)` Sets the speakerphone on or off.
`void` | `setStreamMute(int streamType, boolean state)` This method is deprecated. Use `adjustStreamVolume(int, int, int)` with `ADJUST_MUTE` or `ADJUST_UNMUTE` instead.
`void` | `setStreamSolo(int streamType, boolean state)` This method is deprecated. Do not use. If you need exclusive audio playback use `requestAudioFocus(AudioFocusRequest)`.
`void` | `setStreamVolume(int streamType, int index, int flags)` Sets the volume index for a particular stream.
`boolean` | `setSurroundFormatEnabled(int audioFormat, boolean enabled)` Sets and persists a certain surround format as enabled or not.
`void` | `setVibrateSetting(int vibrateType, int vibrateSetting)` This method is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.
`void` | `setWiredHeadsetOn(boolean on)` This method is deprecated. Do not use.
`boolean` | `shouldVibrate(int vibrateType)` This method is deprecated. Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.
`void` | `startBluetoothSco()` Start bluetooth SCO audio connection.
`void` | `stopBluetoothSco()` Stop bluetooth SCO audio connection.
`void` | `unloadSoundEffects()` Unload Sound effects.
`void` | `unregisterAudioDeviceCallback(AudioDeviceCallback callback)` Unregisters an `AudioDeviceCallback` object which has been previously registered to receive notifications of changes to the set of connected audio devices.
`void` | `unregisterAudioPlaybackCallback(AudioManager.AudioPlaybackCallback cb)` Unregister an audio playback callback previously registered with `registerAudioPlaybackCallback(android.media.AudioManager.AudioPlaybackCallback, android.os.Handler)`.
`void` | `unregisterAudioRecordingCallback(AudioManager.AudioRecordingCallback cb)` Unregister an audio recording callback previously registered with `registerAudioRecordingCallback(android.media.AudioManager.AudioRecordingCallback, android.os.Handler)`.
`void` | `unregisterMediaButtonEventReceiver(PendingIntent eventReceiver)` This method is deprecated. Use `MediaSession` instead.
`void` | `unregisterMediaButtonEventReceiver(ComponentName eventReceiver)` This method is deprecated. Use `MediaSession` instead.
`void` | `unregisterRemoteControlClient(RemoteControlClient rcClient)` This method is deprecated. Use `MediaSession` instead.
`void` | `unregisterRemoteController(RemoteController rctlr)` This method is deprecated. Use `MediaSessionManager#removeOnActiveSessionsChangedListener(android.media.session.MediaSessionManager.OnActiveSessionsChangedListener)` instead.

### 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

### ACTION_AUDIO_BECOMING_NOISY

    public static final String ACTION_AUDIO_BECOMING_NOISY

Broadcast intent, a hint for applications that audio is about to become 'noisy' due to a change in audio outputs. For example, this intent may be sent when a wired headset is unplugged, or when an A2DP audio sink is disconnected, and the audio system is about to automatically switch audio route to the speaker. Applications that are controlling audio streams may consider pausing, reducing volume or some other action on receipt of this intent so as not to surprise the user with audio from the speaker.

Constant Value: "android.media.AUDIO_BECOMING_NOISY"

### ACTION_HDMI_AUDIO_PLUG

    public static final String ACTION_HDMI_AUDIO_PLUG

Broadcast Action: A sticky broadcast indicating an HDMI cable was plugged or unplugged. The intent will have the following extra values: `EXTRA_AUDIO_PLUG_STATE`, `EXTRA_MAX_CHANNEL_COUNT`, `EXTRA_ENCODINGS`.

It can only be received by explicitly registering for it with `Context#registerReceiver(BroadcastReceiver, IntentFilter)`.

Constant Value: "android.media.action.HDMI_AUDIO_PLUG"

### ACTION_HEADSET_PLUG

    public static final String ACTION_HEADSET_PLUG

Broadcast Action: Wired Headset plugged in or unplugged. You cannot receive this through components declared in manifests, only by explicitly registering for it with `Context.registerReceiver()`.

The intent will have the following extra values:

- state - 0 for unplugged, 1 for plugged.
- name - Headset type, human readable string
- microphone - 1 if headset has a microphone, 0 otherwise

Constant Value: "android.intent.action.HEADSET_PLUG"

### ACTION_MICROPHONE_MUTE_CHANGED

    public static final String ACTION_MICROPHONE_MUTE_CHANGED

Broadcast Action: microphone muting state changed. You cannot receive this through components declared in manifests, only by explicitly registering for it with `Context.registerReceiver()`.

The intent has no extra values, use `isMicrophoneMute()` to check whether the microphone is muted.

Constant Value: "android.media.action.MICROPHONE_MUTE_CHANGED"

### ACTION_SCO_AUDIO_STATE_CHANGED

    public static final String ACTION_SCO_AUDIO_STATE_CHANGED

This constant is deprecated.
Use `ACTION_SCO_AUDIO_STATE_UPDATED` instead

Sticky broadcast intent action indicating that the Bluetooth SCO audio connection state has changed. The intent contains on extra `EXTRA_SCO_AUDIO_STATE` indicating the new state which is either `SCO_AUDIO_STATE_DISCONNECTED` or `SCO_AUDIO_STATE_CONNECTED`

See also:

- `startBluetoothSco()`

Constant Value: "android.media.SCO_AUDIO_STATE_CHANGED"

### ACTION_SCO_AUDIO_STATE_UPDATED

    public static final String ACTION_SCO_AUDIO_STATE_UPDATED

Sticky broadcast intent action indicating that the Bluetooth SCO audio connection state has been updated.

This intent has two extras:

- `EXTRA_SCO_AUDIO_STATE` - The new SCO audio state.
- `EXTRA_SCO_AUDIO_PREVIOUS_STATE`- The previous SCO audio state.

EXTRA_SCO_AUDIO_STATE or EXTRA_SCO_AUDIO_PREVIOUS_STATE can be any of:

- `SCO_AUDIO_STATE_DISCONNECTED`,
- `SCO_AUDIO_STATE_CONNECTING` or
- `SCO_AUDIO_STATE_CONNECTED`,

See also:

- `startBluetoothSco()`

Constant Value: "android.media.ACTION_SCO_AUDIO_STATE_UPDATED"

### ACTION_SPEAKERPHONE_STATE_CHANGED

    public static final String ACTION_SPEAKERPHONE_STATE_CHANGED

Broadcast Action: speakerphone state changed. You cannot receive this through components declared in manifests, only by explicitly registering for it with `Context.registerReceiver()`.

The intent has no extra values, use `isSpeakerphoneOn()` to check whether the speakerphone functionality is enabled or not.

Constant Value: "android.media.action.SPEAKERPHONE_STATE_CHANGED"

### ADJUST_LOWER

    public static final int ADJUST_LOWER

Decrease the ringer volume.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`

Constant Value: -1 (0xffffffff)

### ADJUST_MUTE

    public static final int ADJUST_MUTE

Mute the volume. Has no effect if the stream is already muted.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`

Constant Value: -100 (0xffffff9c)

### ADJUST_RAISE

    public static final int ADJUST_RAISE

Increase the ringer volume.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`

Constant Value: 1 (0x00000001)

### ADJUST_SAME

    public static final int ADJUST_SAME

Maintain the previous ringer volume. This may be useful when needing to show the volume toast without actually modifying the volume.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`

Constant Value: 0 (0x00000000)

### ADJUST_TOGGLE_MUTE

    public static final int ADJUST_TOGGLE_MUTE

Toggle the mute state. If muted the stream will be unmuted. If not muted the stream will be muted.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`

Constant Value: 101 (0x00000065)

### ADJUST_UNMUTE

    public static final int ADJUST_UNMUTE

Unmute the volume. Has no effect if the stream is not muted.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`

Constant Value: 100 (0x00000064)

### AUDIOFOCUS_GAIN

    public static final int AUDIOFOCUS_GAIN

Used to indicate a gain of audio focus, or a request of audio focus, of unknown duration.

See also:

- `AudioManager.OnAudioFocusChangeListener.onAudioFocusChange(int)`
- `requestAudioFocus(OnAudioFocusChangeListener, int, int)`

Constant Value: 1 (0x00000001)

### AUDIOFOCUS_GAIN_TRANSIENT

    public static final int AUDIOFOCUS_GAIN_TRANSIENT

Used to indicate a temporary gain or request of audio focus, anticipated to last a short amount of time. Examples of temporary changes are the playback of driving directions, or an event notification.

See also:

- `AudioManager.OnAudioFocusChangeListener.onAudioFocusChange(int)`
- `requestAudioFocus(OnAudioFocusChangeListener, int, int)`

Constant Value: 2 (0x00000002)

### AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE

    public static final int AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE

Used to indicate a temporary request of audio focus, anticipated to last a short amount of time, during which no other applications, or system components, should play anything. Examples of exclusive and transient audio focus requests are voice memo recording and speech recognition, during which the system shouldn't play any notifications, and media playback should have paused.

See also:

- `requestAudioFocus(OnAudioFocusChangeListener, int, int)`

Constant Value: 4 (0x00000004)

### AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK

    public static final int AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK

Used to indicate a temporary request of audio focus, anticipated to last a short amount of time, and where it is acceptable for other audio applications to keep playing after having lowered their output level (also referred to as "ducking"). Examples of temporary changes are the playback of driving directions where playback of music in the background is acceptable.

See also:

- `AudioManager.OnAudioFocusChangeListener.onAudioFocusChange(int)`
- `requestAudioFocus(OnAudioFocusChangeListener, int, int)`

Constant Value: 3 (0x00000003)

### AUDIOFOCUS_LOSS

    public static final int AUDIOFOCUS_LOSS

Used to indicate a loss of audio focus of unknown duration.

See also:

- `AudioManager.OnAudioFocusChangeListener.onAudioFocusChange(int)`

Constant Value: -1 (0xffffffff)

### AUDIOFOCUS_LOSS_TRANSIENT

    public static final int AUDIOFOCUS_LOSS_TRANSIENT

Used to indicate a transient loss of audio focus.

See also:

- `AudioManager.OnAudioFocusChangeListener.onAudioFocusChange(int)`

Constant Value: -2 (0xfffffffe)

### AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK

    public static final int AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK

Used to indicate a transient loss of audio focus where the loser of the audio focus can lower its output volume if it wants to continue playing (also referred to as "ducking"), as the new focus owner doesn't require others to be silent.

See also:

- `AudioManager.OnAudioFocusChangeListener.onAudioFocusChange(int)`

Constant Value: -3 (0xfffffffd)

### AUDIOFOCUS_NONE

    public static final int AUDIOFOCUS_NONE

Used to indicate no audio focus has been gained or lost, or requested.

Constant Value: 0 (0x00000000)

### AUDIOFOCUS_REQUEST_DELAYED

    public static final int AUDIOFOCUS_REQUEST_DELAYED

A focus change request whose granting is delayed: the request was successful, but the requester will only be granted audio focus once the condition that prevented immediate granting has ended. See `requestAudioFocus(android.media.AudioFocusRequest)` and `AudioFocusRequest.Builder#setAcceptsDelayedFocusGain(boolean)`

Constant Value: 2 (0x00000002)

### AUDIOFOCUS_REQUEST_FAILED

    public static final int AUDIOFOCUS_REQUEST_FAILED

A failed focus change request.

Constant Value: 0 (0x00000000)

### AUDIOFOCUS_REQUEST_GRANTED

    public static final int AUDIOFOCUS_REQUEST_GRANTED

A successful focus change request.

Constant Value: 1 (0x00000001)

### AUDIO_SESSION_ID_GENERATE

    public static final int AUDIO_SESSION_ID_GENERATE

A special audio session ID to indicate that the audio session ID isn't known and the framework should generate a new value. This can be used when building a new `AudioTrack` instance with `AudioTrack#AudioTrack(AudioAttributes, AudioFormat, int, int, int)`.

Constant Value: 0 (0x00000000)

### ENCODED_SURROUND_OUTPUT_ALWAYS

    public static final int ENCODED_SURROUND_OUTPUT_ALWAYS

The surround sound formats are ALWAYS available, even if they are not detected by the hardware. Those formats will be reported as part of the HDMI output capability. Applications are then free to use either PCM or encoded output.

Constant Value: 2 (0x00000002)

### ENCODED_SURROUND_OUTPUT_AUTO

    public static final int ENCODED_SURROUND_OUTPUT_AUTO

The surround sound formats are available for use if they are detected. This is the default mode.

Constant Value: 0 (0x00000000)

### ENCODED_SURROUND_OUTPUT_MANUAL

    public static final int ENCODED_SURROUND_OUTPUT_MANUAL

Surround sound formats are available according to the choice of user, even if they are not detected by the hardware. Those formats will be reported as part of the HDMI output capability. Applications are then free to use either PCM or encoded output.

Constant Value: 3 (0x00000003)

### ENCODED_SURROUND_OUTPUT_NEVER

    public static final int ENCODED_SURROUND_OUTPUT_NEVER

The surround sound formats are NEVER available, even if they are detected by the hardware. Those formats will not be reported.

Constant Value: 1 (0x00000001)

### ENCODED_SURROUND_OUTPUT_UNKNOWN

    public static final int ENCODED_SURROUND_OUTPUT_UNKNOWN

The mode for surround sound formats is unknown.

Constant Value: -1 (0xffffffff)

### ERROR

    public static final int ERROR

A default error code.

Constant Value: -1 (0xffffffff)

### ERROR_DEAD_OBJECT

    public static final int ERROR_DEAD_OBJECT

An error code indicating that the object reporting it is no longer valid and needs to be recreated.

Constant Value: -6 (0xfffffffa)

### EXTRA_AUDIO_PLUG_STATE

    public static final String EXTRA_AUDIO_PLUG_STATE

Extra used in `ACTION_HDMI_AUDIO_PLUG` to communicate whether HDMI is plugged in or unplugged. An integer value of 1 indicates a plugged-in state, 0 is unplugged.

Constant Value: "android.media.extra.AUDIO_PLUG_STATE"

### EXTRA_ENCODINGS

    public static final String EXTRA_ENCODINGS

Extra used in `ACTION_HDMI_AUDIO_PLUG` to define the audio encodings supported by the connected HDMI device. The corresponding array of encoding values is only available when the device is plugged in (as expressed by `EXTRA_AUDIO_PLUG_STATE`). Encoding values are defined in `AudioFormat` (for instance see `AudioFormat#ENCODING_PCM_16BIT`). Use `Intent.getIntArrayExtra(String)` to retrieve the encoding values.

Constant Value: "android.media.extra.ENCODINGS"

### EXTRA_MAX_CHANNEL_COUNT

    public static final String EXTRA_MAX_CHANNEL_COUNT

Extra used in `ACTION_HDMI_AUDIO_PLUG` to define the maximum number of channels supported by the HDMI device. The corresponding integer value is only available when the device is plugged in (as expressed by `EXTRA_AUDIO_PLUG_STATE`).

Constant Value: "android.media.extra.MAX_CHANNEL_COUNT"

### EXTRA_RINGER_MODE

    public static final String EXTRA_RINGER_MODE

The new ringer mode.

See also:

- `RINGER_MODE_CHANGED_ACTION`
- `RINGER_MODE_NORMAL`
- `RINGER_MODE_SILENT`
- `RINGER_MODE_VIBRATE`

Constant Value: "android.media.EXTRA_RINGER_MODE"

### EXTRA_SCO_AUDIO_PREVIOUS_STATE

    public static final String EXTRA_SCO_AUDIO_PREVIOUS_STATE

Extra for intent `ACTION_SCO_AUDIO_STATE_UPDATED` containing the previous bluetooth SCO connection state.

Constant Value: "android.media.extra.SCO_AUDIO_PREVIOUS_STATE"

### EXTRA_SCO_AUDIO_STATE

    public static final String EXTRA_SCO_AUDIO_STATE

Extra for intent `ACTION_SCO_AUDIO_STATE_CHANGED` or `ACTION_SCO_AUDIO_STATE_UPDATED` containing the new bluetooth SCO connection state.

Constant Value: "android.media.extra.SCO_AUDIO_STATE"

### EXTRA_VIBRATE_SETTING

    public static final String EXTRA_VIBRATE_SETTING

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode and listen to `RINGER_MODE_CHANGED_ACTION` instead.

The new vibrate setting for a particular type.

See also:

- `VIBRATE_SETTING_CHANGED_ACTION`
- `EXTRA_VIBRATE_TYPE`
- `VIBRATE_SETTING_ON`
- `VIBRATE_SETTING_OFF`
- `VIBRATE_SETTING_ONLY_SILENT`

Constant Value: "android.media.EXTRA_VIBRATE_SETTING"

### EXTRA_VIBRATE_TYPE

    public static final String EXTRA_VIBRATE_TYPE

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode and listen to `RINGER_MODE_CHANGED_ACTION` instead.

The vibrate type whose setting has changed.

See also:

- `VIBRATE_SETTING_CHANGED_ACTION`
- `VIBRATE_TYPE_NOTIFICATION`
- `VIBRATE_TYPE_RINGER`

Constant Value: "android.media.EXTRA_VIBRATE_TYPE"

### FLAG_ALLOW_RINGER_MODES

    public static final int FLAG_ALLOW_RINGER_MODES

Whether to include ringer modes as possible options when changing volume. For example, if true and volume level is 0 and the volume is adjusted with `ADJUST_LOWER`, then the ringer mode may switch the silent or vibrate mode.

By default this is on for the ring stream. If this flag is included, this behavior will be present regardless of the stream type being affected by the ringer mode.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`

Constant Value: 2 (0x00000002)

### FLAG_PLAY_SOUND

    public static final int FLAG_PLAY_SOUND

Whether to play a sound when changing the volume.

If this is given to `adjustVolume(int, int)` or `adjustSuggestedStreamVolume(int, int, int)`, it may be ignored in some cases (for example, the decided stream type is not `AudioManager#STREAM_RING`, or the volume is being adjusted downward).

See also:

- `adjustStreamVolume(int, int, int)`
- `adjustVolume(int, int)`
- `setStreamVolume(int, int, int)`

Constant Value: 4 (0x00000004)

### FLAG_REMOVE_SOUND_AND_VIBRATE

    public static final int FLAG_REMOVE_SOUND_AND_VIBRATE

Removes any sounds/vibrate that may be in the queue, or are playing (related to changing volume).

Constant Value: 8 (0x00000008)

### FLAG_SHOW_UI

    public static final int FLAG_SHOW_UI

Show a toast containing the current volume.

See also:

- `adjustStreamVolume(int, int, int)`
- `adjustVolume(int, int)`
- `setStreamVolume(int, int, int)`
- `setRingerMode(int)`

Constant Value: 1 (0x00000001)

### FLAG_VIBRATE

    public static final int FLAG_VIBRATE

Whether to vibrate if going into the vibrate ringer mode.

Constant Value: 16 (0x00000010)

### FX_BACK

    public static final int FX_BACK

Back sound

See also:

- `playSoundEffect(int)`

Constant Value: 10 (0x0000000a)

### FX_FOCUS_NAVIGATION_DOWN

    public static final int FX_FOCUS_NAVIGATION_DOWN

Focus has moved down

See also:

- `playSoundEffect(int)`

Constant Value: 2 (0x00000002)

### FX_FOCUS_NAVIGATION_LEFT

    public static final int FX_FOCUS_NAVIGATION_LEFT

Focus has moved left

See also:

- `playSoundEffect(int)`

Constant Value: 3 (0x00000003)

### FX_FOCUS_NAVIGATION_RIGHT

    public static final int FX_FOCUS_NAVIGATION_RIGHT

Focus has moved right

See also:

- `playSoundEffect(int)`

Constant Value: 4 (0x00000004)

### FX_FOCUS_NAVIGATION_UP

    public static final int FX_FOCUS_NAVIGATION_UP

Focus has moved up

See also:

- `playSoundEffect(int)`

Constant Value: 1 (0x00000001)

### FX_KEYPRESS_DELETE

    public static final int FX_KEYPRESS_DELETE

IME delete keypress sound

See also:

- `playSoundEffect(int)`

Constant Value: 7 (0x00000007)

### FX_KEYPRESS_INVALID

    public static final int FX_KEYPRESS_INVALID

Invalid keypress sound

See also:

- `playSoundEffect(int)`

Constant Value: 9 (0x00000009)

### FX_KEYPRESS_RETURN

    public static final int FX_KEYPRESS_RETURN

IME return_keypress sound

See also:

- `playSoundEffect(int)`

Constant Value: 8 (0x00000008)

### FX_KEYPRESS_SPACEBAR

    public static final int FX_KEYPRESS_SPACEBAR

IME spacebar keypress sound

See also:

- `playSoundEffect(int)`

Constant Value: 6 (0x00000006)

### FX_KEYPRESS_STANDARD

    public static final int FX_KEYPRESS_STANDARD

IME standard keypress sound

See also:

- `playSoundEffect(int)`

Constant Value: 5 (0x00000005)

### FX_KEY_CLICK

    public static final int FX_KEY_CLICK

Keyboard and direction pad click sound

See also:

- `playSoundEffect(int)`

Constant Value: 0 (0x00000000)

### GET_DEVICES_ALL

    public static final int GET_DEVICES_ALL

Specifies to the `AudioManager#getDevices(int)` method to include both source and sink devices.

Constant Value: 3 (0x00000003)

### GET_DEVICES_INPUTS

    public static final int GET_DEVICES_INPUTS

Specifies to the `AudioManager#getDevices(int)` method to include source (i.e. input) audio devices.

Constant Value: 1 (0x00000001)

### GET_DEVICES_OUTPUTS

    public static final int GET_DEVICES_OUTPUTS

Specifies to the `AudioManager#getDevices(int)` method to include sink (i.e. output) audio devices.

Constant Value: 2 (0x00000002)

### MODE_CALL_SCREENING

    public static final int MODE_CALL_SCREENING

Call screening in progress. Call is connected and audio is accessible to call screening applications but other audio use cases are still possible.

Constant Value: 4 (0x00000004)

### MODE_CURRENT

    public static final int MODE_CURRENT

Current audio mode. Used to apply audio routing to current mode.

Constant Value: -1 (0xffffffff)

### MODE_INVALID

    public static final int MODE_INVALID

Invalid audio mode.

Constant Value: -2 (0xfffffffe)

### MODE_IN_CALL

    public static final int MODE_IN_CALL

In call audio mode. A telephony call is established.

Constant Value: 2 (0x00000002)

### MODE_IN_COMMUNICATION

    public static final int MODE_IN_COMMUNICATION

In communication audio mode. An audio/video chat or VoIP call is established.

Constant Value: 3 (0x00000003)

### MODE_NORMAL

    public static final int MODE_NORMAL

Normal audio mode: not ringing and no call established.

Constant Value: 0 (0x00000000)

### MODE_RINGTONE

    public static final int MODE_RINGTONE

Ringing audio mode. An incoming is being signaled.

Constant Value: 1 (0x00000001)

### NUM_STREAMS

    public static final int NUM_STREAMS

This constant is deprecated.
Do not iterate on volume stream type values.

Constant Value: 5 (0x00000005)

### PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED

    public static final int PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED

Return value for `getPlaybackOffloadSupport(android.media.AudioFormat, android.media.AudioAttributes)`: offload playback supported with gapless transitions

Constant Value: 2 (0x00000002)

### PLAYBACK_OFFLOAD_NOT_SUPPORTED

    public static final int PLAYBACK_OFFLOAD_NOT_SUPPORTED

Return value for `getPlaybackOffloadSupport(android.media.AudioFormat, android.media.AudioAttributes)`: offload playback not supported

Constant Value: 0 (0x00000000)

### PLAYBACK_OFFLOAD_SUPPORTED

    public static final int PLAYBACK_OFFLOAD_SUPPORTED

Return value for `getPlaybackOffloadSupport(android.media.AudioFormat, android.media.AudioAttributes)`: offload playback supported

Constant Value: 1 (0x00000001)

### PROPERTY_OUTPUT_FRAMES_PER_BUFFER

    public static final String PROPERTY_OUTPUT_FRAMES_PER_BUFFER

Used as a key for `getProperty(String)` to request the native or optimal output buffer size for this device's low latency output stream, in decimal PCM frames. Latency-sensitive apps should use this value as a minimum, and offer the user the option to override it. The low latency output stream is typically either the device's primary output stream, or another output stream with smaller buffers.

Constant Value: "android.media.property.OUTPUT_FRAMES_PER_BUFFER"

### PROPERTY_OUTPUT_SAMPLE_RATE

    public static final String PROPERTY_OUTPUT_SAMPLE_RATE

Used as a key for `getProperty(String)` to request the native or optimal output sample rate for this device's low latency output stream, in decimal Hz. Latency-sensitive apps should use this value as a default, and offer the user the option to override it. The low latency output stream is typically either the device's primary output stream, or another output stream with smaller buffers.

Constant Value: "android.media.property.OUTPUT_SAMPLE_RATE"

### PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED

    public static final String PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED

Used as a key for `getProperty(String)` to determine if the unprocessed audio source is available and supported with the expected frequency range and level response.

Constant Value: "android.media.property.SUPPORT_AUDIO_SOURCE_UNPROCESSED"

### PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND

    public static final String PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND

Used as a key for `getProperty(String)` to determine if the default microphone audio source supports near-ultrasound frequencies (range of 18 - 21 kHz).

Constant Value: "android.media.property.SUPPORT_MIC_NEAR_ULTRASOUND"

### PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND

    public static final String PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND

Used as a key for `getProperty(String)` to determine if the default speaker audio path supports near-ultrasound frequencies (range of 18 - 21 kHz).

Constant Value: "android.media.property.SUPPORT_SPEAKER_NEAR_ULTRASOUND"

### RINGER_MODE_CHANGED_ACTION

    public static final String RINGER_MODE_CHANGED_ACTION

Sticky broadcast intent action indicating that the ringer mode has changed. Includes the new ringer mode.

See also:

- `EXTRA_RINGER_MODE`

Constant Value: "android.media.RINGER_MODE_CHANGED"

### RINGER_MODE_NORMAL

    public static final int RINGER_MODE_NORMAL

Ringer mode that may be audible and may vibrate. It will be audible if the volume before changing out of this mode was audible. It will vibrate if the vibrate setting is on.

See also:

- `setRingerMode(int)`
- `getRingerMode()`

Constant Value: 2 (0x00000002)

### RINGER_MODE_SILENT

    public static final int RINGER_MODE_SILENT

Ringer mode that will be silent and will not vibrate. (This overrides the vibrate setting.)

See also:

- `setRingerMode(int)`
- `getRingerMode()`

Constant Value: 0 (0x00000000)

### RINGER_MODE_VIBRATE

    public static final int RINGER_MODE_VIBRATE

Ringer mode that will be silent and will vibrate. (This will cause the phone ringer to always vibrate, but the notification vibrate to only vibrate if set.)

See also:

- `setRingerMode(int)`
- `getRingerMode()`

Constant Value: 1 (0x00000001)

### ROUTE_ALL

    public static final int ROUTE_ALL

This constant is deprecated.
Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Used for mask parameter of `setRouting(int, int, int)`.

Constant Value: -1 (0xffffffff)

### ROUTE_BLUETOOTH

    public static final int ROUTE_BLUETOOTH

This constant is deprecated.
use `ROUTE_BLUETOOTH_SCO`Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Constant Value: 4 (0x00000004)

### ROUTE_BLUETOOTH_A2DP

    public static final int ROUTE_BLUETOOTH_A2DP

This constant is deprecated.
Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Routing audio output to bluetooth A2DP

Constant Value: 16 (0x00000010)

### ROUTE_BLUETOOTH_SCO

    public static final int ROUTE_BLUETOOTH_SCO

This constant is deprecated.
Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Routing audio output to bluetooth SCO

Constant Value: 4 (0x00000004)

### ROUTE_EARPIECE

    public static final int ROUTE_EARPIECE

This constant is deprecated.
Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Routing audio output to earpiece

Constant Value: 1 (0x00000001)

### ROUTE_HEADSET

    public static final int ROUTE_HEADSET

This constant is deprecated.
Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Routing audio output to headset

Constant Value: 8 (0x00000008)

### ROUTE_SPEAKER

    public static final int ROUTE_SPEAKER

This constant is deprecated.
Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Routing audio output to speaker

Constant Value: 2 (0x00000002)

### SCO_AUDIO_STATE_CONNECTED

    public static final int SCO_AUDIO_STATE_CONNECTED

Value for extra `EXTRA_SCO_AUDIO_STATE` or `EXTRA_SCO_AUDIO_PREVIOUS_STATE` indicating that the SCO audio channel is established

Constant Value: 1 (0x00000001)

### SCO_AUDIO_STATE_CONNECTING

    public static final int SCO_AUDIO_STATE_CONNECTING

Value for extra EXTRA_SCO_AUDIO_STATE or EXTRA_SCO_AUDIO_PREVIOUS_STATE indicating that the SCO audio channel is being established

Constant Value: 2 (0x00000002)

### SCO_AUDIO_STATE_DISCONNECTED

    public static final int SCO_AUDIO_STATE_DISCONNECTED

Value for extra EXTRA_SCO_AUDIO_STATE or EXTRA_SCO_AUDIO_PREVIOUS_STATE indicating that the SCO audio channel is not established

Constant Value: 0 (0x00000000)

### SCO_AUDIO_STATE_ERROR

    public static final int SCO_AUDIO_STATE_ERROR

Value for extra EXTRA_SCO_AUDIO_STATE indicating that there was an error trying to obtain the state

Constant Value: -1 (0xffffffff)

### STREAM_ACCESSIBILITY

    public static final int STREAM_ACCESSIBILITY

Used to identify the volume of audio streams for accessibility prompts

Constant Value: 10 (0x0000000a)

### STREAM_ALARM

    public static final int STREAM_ALARM

Used to identify the volume of audio streams for alarms

Constant Value: 4 (0x00000004)

### STREAM_DTMF

    public static final int STREAM_DTMF

Used to identify the volume of audio streams for DTMF Tones

Constant Value: 8 (0x00000008)

### STREAM_MUSIC

    public static final int STREAM_MUSIC

Used to identify the volume of audio streams for music playback

Constant Value: 3 (0x00000003)

### STREAM_NOTIFICATION

    public static final int STREAM_NOTIFICATION

Used to identify the volume of audio streams for notifications

Constant Value: 5 (0x00000005)

### STREAM_RING

    public static final int STREAM_RING

Used to identify the volume of audio streams for the phone ring

Constant Value: 2 (0x00000002)

### STREAM_SYSTEM

    public static final int STREAM_SYSTEM

Used to identify the volume of audio streams for system sounds

Constant Value: 1 (0x00000001)

### STREAM_VOICE_CALL

    public static final int STREAM_VOICE_CALL

Used to identify the volume of audio streams for phone calls

Constant Value: 0 (0x00000000)

### USE_DEFAULT_STREAM_TYPE

    public static final int USE_DEFAULT_STREAM_TYPE

Suggests using the default stream type. This may not be used in all places a stream type is needed.

Constant Value: -2147483648 (0x80000000)

### VIBRATE_SETTING_CHANGED_ACTION

    public static final String VIBRATE_SETTING_CHANGED_ACTION

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode and listen to `RINGER_MODE_CHANGED_ACTION` instead.

Broadcast intent action indicating that the vibrate setting has changed. Includes the vibrate type and its new setting.

See also:

- `EXTRA_VIBRATE_TYPE`
- `EXTRA_VIBRATE_SETTING`

Constant Value: "android.media.VIBRATE_SETTING_CHANGED"

### VIBRATE_SETTING_OFF

    public static final int VIBRATE_SETTING_OFF

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Vibrate setting that suggests to never vibrate.

See also:

- `setVibrateSetting(int, int)`
- `getVibrateSetting(int)`

Constant Value: 0 (0x00000000)

### VIBRATE_SETTING_ON

    public static final int VIBRATE_SETTING_ON

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Vibrate setting that suggests to vibrate when possible.

See also:

- `setVibrateSetting(int, int)`
- `getVibrateSetting(int)`

Constant Value: 1 (0x00000001)

### VIBRATE_SETTING_ONLY_SILENT

    public static final int VIBRATE_SETTING_ONLY_SILENT

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Vibrate setting that suggests to only vibrate when in the vibrate ringer mode.

See also:

- `setVibrateSetting(int, int)`
- `getVibrateSetting(int)`

Constant Value: 2 (0x00000002)

### VIBRATE_TYPE_NOTIFICATION

    public static final int VIBRATE_TYPE_NOTIFICATION

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Vibrate type that corresponds to notifications.

See also:

- `setVibrateSetting(int, int)`
- `getVibrateSetting(int)`
- `shouldVibrate(int)`

Constant Value: 1 (0x00000001)

### VIBRATE_TYPE_RINGER

    public static final int VIBRATE_TYPE_RINGER

This constant is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Vibrate type that corresponds to the ringer.

See also:

- `setVibrateSetting(int, int)`
- `getVibrateSetting(int)`
- `shouldVibrate(int)`

Constant Value: 0 (0x00000000)

## Public methods

### abandonAudioFocus

    public int abandonAudioFocus (AudioManager.OnAudioFocusChangeListener l)

This method is deprecated.
use `abandonAudioFocusRequest(android.media.AudioFocusRequest)`

Abandon audio focus. Causes the previous focus owner, if any, to receive focus.

Parameters
`l` | `AudioManager.OnAudioFocusChangeListener`: the listener with which focus was requested.

Returns
`int` | `AUDIOFOCUS_REQUEST_FAILED` or `AUDIOFOCUS_REQUEST_GRANTED`

### abandonAudioFocusRequest

    public int abandonAudioFocusRequest (AudioFocusRequest focusRequest)

Abandon audio focus. Causes the previous focus owner, if any, to receive focus.

Parameters
`focusRequest` | `AudioFocusRequest`: the `AudioFocusRequest` that was used when requesting focus with `requestAudioFocus(android.media.AudioFocusRequest)`. This value cannot be `null`.

Returns
`int` | `AUDIOFOCUS_REQUEST_FAILED` or `AUDIOFOCUS_REQUEST_GRANTED`

Throws
`IllegalArgumentException` | if passed a null argument

### addOnCommunicationDeviceChangedListener

    public void addOnCommunicationDeviceChangedListener (Executor executor,
                    AudioManager.OnCommunicationDeviceChangedListener listener)

Adds a listener for being notified of changes to the communication audio device. See `setCommunicationDevice(android.media.AudioDeviceInfo)`.

Parameters
`executor` | `Executor`: This value cannot be `null`. Callback and listener events are dispatched through this `Executor`, providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use `Context.getMainExecutor()`. To dispatch events through a shared thread pool, you can use `AsyncTask#THREAD_POOL_EXECUTOR`.
`listener` | `AudioManager.OnCommunicationDeviceChangedListener`: This value cannot be `null`.

### addOnModeChangedListener

    public void addOnModeChangedListener (Executor executor,
                    AudioManager.OnModeChangedListener listener)

Adds a listener to be notified of changes to the audio mode. See `getMode()`

Parameters
`executor` | `Executor`: This value cannot be `null`. Callback and listener events are dispatched through this `Executor`, providing an easy way to control which thread is used. To dispatch events through the main thread of your application, you can use `Context.getMainExecutor()`. To dispatch events through a shared thread pool, you can use `AsyncTask#THREAD_POOL_EXECUTOR`.
`listener` | `AudioManager.OnModeChangedListener`: This value cannot be `null`.

### adjustStreamVolume

    public void adjustStreamVolume (int streamType,
                    int direction,
                    int flags)

Adjusts the volume of a particular stream by one step in a direction.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

This method has no effect if the device implements a fixed volume policy as indicated by `isVolumeFixed()`.

From N onward, ringer mode adjustments that would toggle Do Not Disturb are not allowed unless the app has been granted Do Not Disturb Access. See `NotificationManager#isNotificationPolicyAccessGranted()`.

Parameters
`streamType` | `int`: The stream type to adjust. One of `STREAM_VOICE_CALL`, `STREAM_SYSTEM`, `STREAM_RING`, `STREAM_MUSIC`, `STREAM_ALARM` or `STREAM_ACCESSIBILITY`.
`direction` | `int`: The direction to adjust the volume. One of `ADJUST_LOWER`, `ADJUST_RAISE`, or `ADJUST_SAME`.
`flags` | `int`: One or more flags.

Throws
`SecurityException` | if the adjustment triggers a Do Not Disturb change and the caller is not granted notification policy access.

See also:

- `adjustVolume(int, int)`
- `setStreamVolume(int, int, int)`

### adjustSuggestedStreamVolume

    public void adjustSuggestedStreamVolume (int direction,
                    int suggestedStreamType,
                    int flags)

Adjusts the volume of the most relevant stream, or the given fallback stream.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

This method has no effect if the device implements a fixed volume policy as indicated by `isVolumeFixed()`.

Parameters
`direction` | `int`: The direction to adjust the volume. One of `ADJUST_LOWER`, `ADJUST_RAISE`, `ADJUST_SAME`, `ADJUST_MUTE`, `ADJUST_UNMUTE`, or `ADJUST_TOGGLE_MUTE`.
`suggestedStreamType` | `int`: The stream type that will be used if there isn't a relevant stream. `USE_DEFAULT_STREAM_TYPE` is valid here.
`flags` | `int`: One or more flags.

See also:

- `adjustVolume(int, int)`
- `adjustStreamVolume(int, int, int)`
- `setStreamVolume(int, int, int)`
- `isVolumeFixed()`

### adjustVolume

    public void adjustVolume (int direction,
                    int flags)

Adjusts the volume of the most relevant stream. For example, if a call is active, it will have the highest priority regardless of if the in-call screen is showing. Another example, if music is playing in the background and a call is not active, the music stream will be adjusted.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

This method has no effect if the device implements a fixed volume policy as indicated by `isVolumeFixed()`.

Parameters
`direction` | `int`: The direction to adjust the volume. One of `ADJUST_LOWER`, `ADJUST_RAISE`, `ADJUST_SAME`, `ADJUST_MUTE`, `ADJUST_UNMUTE`, or `ADJUST_TOGGLE_MUTE`.
`flags` | `int`: One or more flags.

See also:

- `adjustSuggestedStreamVolume(int, int, int)`
- `adjustStreamVolume(int, int, int)`
- `setStreamVolume(int, int, int)`
- `isVolumeFixed()`

### clearCommunicationDevice

    public void clearCommunicationDevice ()

Cancels previous communication device selection made with `setCommunicationDevice(android.media.AudioDeviceInfo)`.

### dispatchMediaKeyEvent

    public void dispatchMediaKeyEvent (KeyEvent keyEvent)

Sends a simulated key event for a media button. To simulate a key press, you must first send a KeyEvent built with a `KeyEvent#ACTION_DOWN` action, then another event with the `KeyEvent#ACTION_UP` action.

The key event will be sent to the current media key event consumer which registered with `AudioManager#registerMediaButtonEventReceiver(PendingIntent)`.

Parameters
`keyEvent` | `KeyEvent`: a `KeyEvent` instance whose key code is one of `KeyEvent#KEYCODE_MUTE`, `KeyEvent#KEYCODE_HEADSETHOOK`, `KeyEvent#KEYCODE_MEDIA_PLAY`, `KeyEvent#KEYCODE_MEDIA_PAUSE`, `KeyEvent#KEYCODE_MEDIA_PLAY_PAUSE`, `KeyEvent#KEYCODE_MEDIA_STOP`, `KeyEvent#KEYCODE_MEDIA_NEXT`, `KeyEvent#KEYCODE_MEDIA_PREVIOUS`, `KeyEvent#KEYCODE_MEDIA_REWIND`, `KeyEvent#KEYCODE_MEDIA_RECORD`, `KeyEvent#KEYCODE_MEDIA_FAST_FORWARD`, `KeyEvent#KEYCODE_MEDIA_CLOSE`, `KeyEvent#KEYCODE_MEDIA_EJECT`, or `KeyEvent#KEYCODE_MEDIA_AUDIO_TRACK`.

### generateAudioSessionId

    public int generateAudioSessionId ()

Return a new audio session identifier not associated with any player or effect. An audio session identifier is a system wide unique identifier for a set of audio streams (one or more mixed together).

The primary use of the audio session ID is to associate audio effects to audio players, such as `MediaPlayer` or `AudioTrack`: all audio effects sharing the same audio session ID will be applied to the mixed audio content of the players that share the same audio session.

This method can for instance be used when creating one of the `AudioEffect` objects to define the audio session of the effect, or to specify a session for a speech synthesis utterance in `TextToSpeech.Engine`.

Returns
`int` | a new unclaimed and unused audio session identifier, or `ERROR` when the system failed to generate a new session, a condition in which audio playback or recording will subsequently fail as well.

### getActivePlaybackConfigurations

    public List<AudioPlaybackConfiguration> getActivePlaybackConfigurations ()

Returns the current active audio playback configurations of the device

Returns
`List<AudioPlaybackConfiguration>` | a non-null list of playback configurations. An empty list indicates there is no playback active when queried.

See also:

- `AudioPlaybackConfiguration`

### getActiveRecordingConfigurations

    public List<AudioRecordingConfiguration> getActiveRecordingConfigurations ()

Returns the current active audio recording configurations of the device.

Returns
`List<AudioRecordingConfiguration>` | a non-null list of recording configurations. An empty list indicates there is no recording active when queried.

See also:

- `AudioRecordingConfiguration`

### getAllowedCapturePolicy

    public int getAllowedCapturePolicy ()

Return the capture policy.

Returns
`int` | the capture policy set by `setAllowedCapturePolicy(int)` or the default if it was not called. Value is `AudioAttributes.ALLOW_CAPTURE_BY_ALL`, `AudioAttributes.ALLOW_CAPTURE_BY_SYSTEM`, or `AudioAttributes.ALLOW_CAPTURE_BY_NONE`

### getAudioHwSyncForSession

    public int getAudioHwSyncForSession (int sessionId)

Retrieves the Hardware A/V synchronization ID corresponding to the given audio session ID. For more details on Hardware A/V synchronization please refer to media tunneling documentation.

Parameters
`sessionId` | `int`: the audio session ID for which the HW A/V sync ID is retrieved.

Returns
`int` | the HW A/V sync ID for this audio session (an integer different from 0).

Throws
`UnsupportedOperationException` | if HW A/V synchronization is not supported.

### getAvailableCommunicationDevices

    public List<AudioDeviceInfo> getAvailableCommunicationDevices ()

Returns a list of audio devices that can be selected for communication use cases via `setCommunicationDevice(android.media.AudioDeviceInfo)`.

Returns
`List<AudioDeviceInfo>` | a list of `AudioDeviceInfo` suitable for use with setCommunicationDevice(). This value cannot be `null`.

### getCommunicationDevice

    public AudioDeviceInfo getCommunicationDevice ()

Returns currently selected audio device for communication.

This API replaces the following deprecated APIs:

- `isBluetoothScoOn()`
- `isSpeakerphoneOn()`

Returns
`AudioDeviceInfo` | an `AudioDeviceInfo` indicating which audio device is currently selected for communication use cases. Can be null on platforms not supporting `PackageManager.FEATURE_TELEPHONY`. is used.

### getDevices

    public AudioDeviceInfo[] getDevices (int flags)

Returns an array of `AudioDeviceInfo` objects corresponding to the audio devices currently connected to the system and meeting the criteria specified in the `flags` parameter.

Parameters
`flags` | `int`: A set of bitflags specifying the criteria to test. Value is either `0` or a combination of `GET_DEVICES_INPUTS`, and `GET_DEVICES_OUTPUTS`

Returns
`AudioDeviceInfo[]` | A (possibly zero-length) array of AudioDeviceInfo objects.

See also:

- `GET_DEVICES_OUTPUTS`
- `GET_DEVICES_INPUTS`
- `GET_DEVICES_ALL`

### getEncodedSurroundMode

    public int getEncodedSurroundMode ()

Gets the surround sound mode.

Returns
`int` | true if successful, otherwise false Value is `ENCODED_SURROUND_OUTPUT_UNKNOWN`, `ENCODED_SURROUND_OUTPUT_AUTO`, `ENCODED_SURROUND_OUTPUT_NEVER`, `ENCODED_SURROUND_OUTPUT_ALWAYS`, or `ENCODED_SURROUND_OUTPUT_MANUAL`

### getMicrophones

    public List<MicrophoneInfo> getMicrophones ()

Returns a list of `MicrophoneInfo` that corresponds to the characteristics of all available microphones. The list is empty when no microphones are available on the device. An error during the query will result in an IOException being thrown.

Returns
`List<MicrophoneInfo>` | a list that contains all microphones' characteristics

Throws
`IOException` | if an error occurs.

### getMode

    public int getMode ()

Returns the current audio mode.

Returns
`int` | the current audio mode. Value is `MODE_NORMAL`, `MODE_RINGTONE`, `MODE_IN_CALL`, `MODE_IN_COMMUNICATION`, or `MODE_CALL_SCREENING`

### getParameters

    public String getParameters (String keys)

Gets a variable number of parameter values from audio hardware.

Parameters
`keys` | `String`: list of parameters

Returns
`String` | list of parameters key value pairs in the form: key1=value1;key2=value2;...

### getPlaybackOffloadSupport

    public static int getPlaybackOffloadSupport (AudioFormat format,
                    AudioAttributes attributes)

Returns whether offloaded playback of an audio format is supported on the device or not and when supported whether gapless transitions are possible or not.

Offloaded playback is the feature where the decoding and playback of an audio stream is not competing with other software resources. In general, it is supported by dedicated hardware, such as audio DSPs.

Note that this query only provides information about the support of an audio format, it does not indicate whether the resources necessary for the offloaded playback are available at that instant.

Parameters
`format` | `AudioFormat`: the audio format (codec, sample rate, channels) being checked. This value cannot be `null`.
`attributes` | `AudioAttributes`: the `AudioAttributes` to be used for playback This value cannot be `null`.

Returns
`int` | `PLAYBACK_OFFLOAD_NOT_SUPPORTED` if offload playback if not supported, `PLAYBACK_OFFLOAD_SUPPORTED` if offload playback is supported or `PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED` if gapless transitions are also supported. Value is `PLAYBACK_OFFLOAD_NOT_SUPPORTED`, `PLAYBACK_OFFLOAD_SUPPORTED`, or `PLAYBACK_OFFLOAD_GAPLESS_SUPPORTED`

### getProperty

    public String getProperty (String key)

Returns the value of the property with the specified key.

Parameters
`key` | `String`: One of the strings corresponding to a property key: either `PROPERTY_OUTPUT_SAMPLE_RATE`, `PROPERTY_OUTPUT_FRAMES_PER_BUFFER`, `PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND`, `PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND`, or `PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED`.

Returns
`String` | A string representing the associated value for that property key, or null if there is no value for that key.

### getRingerMode

    public int getRingerMode ()

Returns the current ringtone mode.

Returns
`int` | The current ringtone mode, one of `RINGER_MODE_NORMAL`, `RINGER_MODE_SILENT`, or `RINGER_MODE_VIBRATE`.

See also:

- `setRingerMode(int)`

### getRouting

    public int getRouting (int mode)

This method is deprecated.
Do not query audio routing directly, use isSpeakerphoneOn(), isBluetoothScoOn(), isBluetoothA2dpOn() and isWiredHeadsetOn() methods instead.

Returns the current audio routing bit vector for a specified mode.

Parameters
`mode` | `int`: audio mode to get route (e.g., MODE_RINGTONE)

Returns
`int` | an audio route bit vector that can be compared with ROUTE_xxx bits

### getSpatializer

    public Spatializer getSpatializer ()

Return a handle to the optional platform's `Spatializer`

Returns
`Spatializer` | the `Spatializer` instance. This value cannot be `null`.

See also:

- `to check for the level of support of the effect on the platform`

### getStreamMaxVolume

    public int getStreamMaxVolume (int streamType)

Returns the maximum volume index for a particular stream.

Parameters
`streamType` | `int`: The stream type whose maximum volume index is returned.

Returns
`int` | The maximum valid volume index for the stream.

See also:

- `getStreamVolume(int)`

### getStreamMinVolume

    public int getStreamMinVolume (int streamType)

Returns the minimum volume index for a particular stream.

Parameters
`streamType` | `int`: The stream type whose minimum volume index is returned. Must be one of `STREAM_VOICE_CALL`, `STREAM_SYSTEM`, `STREAM_RING`, `STREAM_MUSIC`, `STREAM_ALARM`, `STREAM_NOTIFICATION`, `STREAM_DTMF` or `STREAM_ACCESSIBILITY`.

Returns
`int` | The minimum valid volume index for the stream.

See also:

- `getStreamVolume(int)`

### getStreamVolume

    public int getStreamVolume (int streamType)

Returns the current volume index for a particular stream.

Parameters
`streamType` | `int`: The stream type whose volume index is returned.

Returns
`int` | The current volume index for the stream.

See also:

- `getStreamMaxVolume(int)`
- `setStreamVolume(int, int, int)`

### getStreamVolumeDb

    public float getStreamVolumeDb (int streamType,
                    int index,
                    int deviceType)

Returns the volume in dB (decibel) for the given stream type at the given volume index, on the given type of audio output device.

Parameters
`streamType` | `int`: stream type for which the volume is queried. Value is `STREAM_VOICE_CALL`, `STREAM_SYSTEM`, `STREAM_RING`, `STREAM_MUSIC`, `STREAM_ALARM`, `STREAM_NOTIFICATION`, `STREAM_DTMF`, or `STREAM_ACCESSIBILITY`
`index` | `int`: the volume index for which the volume is queried. The index value must be between the minimum and maximum index values for the given stream type (see `getStreamMinVolume(int)` and `getStreamMaxVolume(int)`).
`deviceType` | `int`: the type of audio output device for which volume is queried. Value is `AudioDeviceInfo.TYPE_BUILTIN_EARPIECE`, `AudioDeviceInfo.TYPE_BUILTIN_SPEAKER`, `AudioDeviceInfo.TYPE_WIRED_HEADSET`, `AudioDeviceInfo.TYPE_WIRED_HEADPHONES`, `AudioDeviceInfo.TYPE_BLUETOOTH_SCO`, `AudioDeviceInfo.TYPE_BLUETOOTH_A2DP`, `AudioDeviceInfo.TYPE_HDMI`, `AudioDeviceInfo.TYPE_DOCK`, `AudioDeviceInfo.TYPE_USB_ACCESSORY`, `AudioDeviceInfo.TYPE_USB_DEVICE`, `AudioDeviceInfo.TYPE_USB_HEADSET`, `AudioDeviceInfo.TYPE_TELEPHONY`, `AudioDeviceInfo.TYPE_LINE_ANALOG`, `AudioDeviceInfo.TYPE_HDMI_ARC`, `AudioDeviceInfo.TYPE_HDMI_EARC`, `AudioDeviceInfo.TYPE_LINE_DIGITAL`, `AudioDeviceInfo.TYPE_FM`, `AudioDeviceInfo.TYPE_AUX_LINE`, `AudioDeviceInfo.TYPE_IP`, `AudioDeviceInfo.TYPE_BUS`, `AudioDeviceInfo.TYPE_HEARING_AID`, `AudioDeviceInfo.TYPE_BUILTIN_SPEAKER_SAFE`, `AudioDeviceInfo.TYPE_BLE_HEADSET`, or `AudioDeviceInfo.TYPE_BLE_SPEAKER`

Returns
`float` | a volume expressed in dB. A negative value indicates the audio signal is attenuated. A typical maximum value at the maximum volume index is 0 dB (no attenuation nor amplification). Muting is reflected by a value of `Float#NEGATIVE_INFINITY`.

### getVibrateSetting

    public int getVibrateSetting (int vibrateType)

This method is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Returns whether the user's vibrate setting for a vibrate type.

This shouldn't be needed by most clients that want to vibrate, instead see `shouldVibrate(int)`.

Parameters
`vibrateType` | `int`: The type of vibrate. One of `VIBRATE_TYPE_NOTIFICATION` or `VIBRATE_TYPE_RINGER`.

Returns
`int` | The vibrate setting, one of `VIBRATE_SETTING_ON`, `VIBRATE_SETTING_OFF`, or `VIBRATE_SETTING_ONLY_SILENT`.

See also:

- `setVibrateSetting(int, int)`
- `shouldVibrate(int)`

### isBluetoothA2dpOn

    public boolean isBluetoothA2dpOn ()

This method is deprecated.
Use `AudioManager#getDevices(int)` instead to list available audio devices.

Checks whether a Bluetooth A2DP audio peripheral is connected or not.

Returns
`boolean` | true if a Bluetooth A2DP peripheral is connected false if otherwise

### isBluetoothScoAvailableOffCall

    public boolean isBluetoothScoAvailableOffCall ()

Indicates if current platform supports use of SCO for off call use cases. Application wanted to use bluetooth SCO audio when the phone is not in call must first call this method to make sure that the platform supports this feature.

Returns
`boolean` | true if bluetooth SCO can be used for audio when not in call false otherwise

See also:

- `startBluetoothSco()`

### isBluetoothScoOn

    public boolean isBluetoothScoOn ()

Checks whether communications use Bluetooth SCO.

Returns
`boolean` | true if SCO is used for communications; false if otherwise

### isCallScreeningModeSupported

    public boolean isCallScreeningModeSupported ()

Indicates if the platform supports a special call screening and call monitoring mode.

When this mode is supported, it is possible to perform call screening and monitoring functions while other use cases like music or movie playback are active.

Use `setMode(int)` with mode `MODE_CALL_SCREENING` to place the platform in call screening mode.

If call screening mode is not supported, setting mode to MODE_CALL_SCREENING will be ignored and will not change current mode reported by `getMode()`.

Returns
`boolean` | true if call screening mode is supported, false otherwise.

### isHapticPlaybackSupported

    public static boolean isHapticPlaybackSupported ()

Return if audio haptic coupled playback is supported or not.

Returns
`boolean` | whether audio haptic playback supported.

### isMicrophoneMute

    public boolean isMicrophoneMute ()

Checks whether the microphone mute is on or off.

Returns
`boolean` | true if microphone is muted, false if it's not

### isMusicActive

    public boolean isMusicActive ()

Checks whether any music is active.

Returns
`boolean` | true if any music tracks are active.

### isOffloadedPlaybackSupported

    public static boolean isOffloadedPlaybackSupported (AudioFormat format,
                    AudioAttributes attributes)

Returns whether offloaded playback of an audio format is supported on the device.

Offloaded playback is the feature where the decoding and playback of an audio stream is not competing with other software resources. In general, it is supported by dedicated hardware, such as audio DSPs.

Note that this query only provides information about the support of an audio format, it does not indicate whether the resources necessary for the offloaded playback are available at that instant.

Parameters
`format` | `AudioFormat`: the audio format (codec, sample rate, channels) being checked. This value cannot be `null`.
`attributes` | `AudioAttributes`: the `AudioAttributes` to be used for playback This value cannot be `null`.

Returns
`boolean` | true if the given audio format can be offloaded.

### isSpeakerphoneOn

    public boolean isSpeakerphoneOn ()

Checks whether the speakerphone is on or off.

Returns
`boolean` | true if speakerphone is on, false if it's off

### isStreamMute

    public boolean isStreamMute (int streamType)

Returns the current mute state for a particular stream.

Parameters
`streamType` | `int`: The stream to get mute state for.

Returns
`boolean` | The mute state for the given stream.

See also:

- `adjustStreamVolume(int, int, int)`

### isSurroundFormatEnabled

    public boolean isSurroundFormatEnabled (int audioFormat)

Gets whether a certain surround format is enabled or not.

Parameters
`audioFormat` | `int`: a surround format Value is `AudioFormat.ENCODING_AC3`, `AudioFormat.ENCODING_E_AC3`, `AudioFormat.ENCODING_DTS`, `AudioFormat.ENCODING_DTS_HD`, `AudioFormat.ENCODING_AAC_LC`, `AudioFormat.ENCODING_DOLBY_TRUEHD`, `AudioFormat.ENCODING_AC4`, `AudioFormat.ENCODING_E_AC3_JOC`, `AudioFormat.ENCODING_DOLBY_MAT`, `AudioFormat.ENCODING_MPEGH_BL_L3`, `AudioFormat.ENCODING_MPEGH_BL_L4`, `AudioFormat.ENCODING_MPEGH_LC_L3`, `AudioFormat.ENCODING_MPEGH_LC_L4`, `AudioFormat.ENCODING_DTS_UHD`, or `AudioFormat.ENCODING_DRA`

Returns
`boolean` | whether the required surround format is enabled

### isVolumeFixed

    public boolean isVolumeFixed ()

Indicates if the device implements a fixed volume policy.

Some devices may not have volume control and may operate at a fixed volume, and may not enable muting or changing the volume of audio streams. This method will return true on such devices.

The following APIs have no effect when volume is fixed:

- `adjustVolume(int, int)`
- `adjustSuggestedStreamVolume(int, int, int)`
- `adjustStreamVolume(int, int, int)`
- `setStreamVolume(int, int, int)`
- `setRingerMode(int)`
- `setStreamSolo(int, boolean)`
- `setStreamMute(int, boolean)`

Returns
`boolean` |

### isWiredHeadsetOn

    public boolean isWiredHeadsetOn ()

This method is deprecated.
Use `AudioManager#getDevices(int)` instead to list available audio devices.

Checks whether a wired headset is connected or not.

This is not a valid indication that audio playback is actually over the wired headset as audio routing depends on other conditions.

Returns
`boolean` | true if a wired headset is connected. false if otherwise

### loadSoundEffects

    public void loadSoundEffects ()

Load Sound effects. This method must be called when sound effects are enabled.

### playSoundEffect

    public void playSoundEffect (int effectType)

Plays a sound effect (Key clicks, lid open/close...)

Parameters
`effectType` | `int`: The type of sound effect. NOTE: This version uses the UI settings to determine whether sounds are heard or not. Value is `FX_KEY_CLICK`, `FX_FOCUS_NAVIGATION_UP`, `FX_FOCUS_NAVIGATION_DOWN`, `FX_FOCUS_NAVIGATION_LEFT`, `FX_FOCUS_NAVIGATION_RIGHT`, `FX_KEYPRESS_STANDARD`, `FX_KEYPRESS_SPACEBAR`, `FX_KEYPRESS_DELETE`, `FX_KEYPRESS_RETURN`, `FX_KEYPRESS_INVALID`, or `FX_BACK`

### playSoundEffect

    public void playSoundEffect (int effectType,
                    float volume)

Plays a sound effect (Key clicks, lid open/close...)

Parameters
`effectType` | `int`: The type of sound effect. Value is `FX_KEY_CLICK`, `FX_FOCUS_NAVIGATION_UP`, `FX_FOCUS_NAVIGATION_DOWN`, `FX_FOCUS_NAVIGATION_LEFT`, `FX_FOCUS_NAVIGATION_RIGHT`, `FX_KEYPRESS_STANDARD`, `FX_KEYPRESS_SPACEBAR`, `FX_KEYPRESS_DELETE`, `FX_KEYPRESS_RETURN`, `FX_KEYPRESS_INVALID`, or `FX_BACK`
`volume` | `float`: Sound effect volume. The volume value is a raw scalar so UI controls should be scaled logarithmically. If a volume of -1 is specified, the AudioManager.STREAM_MUSIC stream volume minus 3dB will be used. NOTE: This version is for applications that have their own settings panel for enabling and controlling volume.

### registerAudioDeviceCallback

    public void registerAudioDeviceCallback (AudioDeviceCallback callback,
                    Handler handler)

Registers an `AudioDeviceCallback` object to receive notifications of changes to the set of connected audio devices.

Parameters
`callback` | `AudioDeviceCallback`: The `AudioDeviceCallback` object to receive connect/disconnect notifications.
`handler` | `Handler`: Specifies the `Handler` object for the thread on which to execute the callback. If `null`, the `Handler` associated with the main `Looper` will be used. This value may be `null`.

### registerAudioPlaybackCallback

    public void registerAudioPlaybackCallback (AudioManager.AudioPlaybackCallback cb,
                    Handler handler)

Register a callback to be notified of audio playback changes through `AudioPlaybackCallback`

Parameters
`cb` | `AudioManager.AudioPlaybackCallback`: non-null callback to register This value cannot be `null`.
`handler` | `Handler`: the `Handler` object for the thread on which to execute the callback. If `null`, the `Handler` associated with the main `Looper` will be used. This value may be `null`.

### registerAudioRecordingCallback

    public void registerAudioRecordingCallback (AudioManager.AudioRecordingCallback cb,
                    Handler handler)

Register a callback to be notified of audio recording changes through `AudioRecordingCallback`

Parameters
`cb` | `AudioManager.AudioRecordingCallback`: non-null callback to register This value cannot be `null`.
`handler` | `Handler`: the `Handler` object for the thread on which to execute the callback. If `null`, the `Handler` associated with the main `Looper` will be used. This value may be `null`.

### registerMediaButtonEventReceiver

    public void registerMediaButtonEventReceiver (ComponentName eventReceiver)

This method is deprecated.
Use `MediaSession#setMediaButtonReceiver(PendingIntent)` instead.

Register a component to be the sole receiver of MEDIA_BUTTON intents.

Parameters
`eventReceiver` | `ComponentName`: identifier of a `BroadcastReceiver` that will receive the media button intent. This broadcast receiver must be declared in the application manifest. The package of the component must match that of the context you're registering from.

### registerMediaButtonEventReceiver

    public void registerMediaButtonEventReceiver (PendingIntent eventReceiver)

This method is deprecated.
Use `MediaSession#setMediaButtonReceiver(PendingIntent)` instead.

Register a component to be the sole receiver of MEDIA_BUTTON intents. This is like `registerMediaButtonEventReceiver(android.content.ComponentName)`, but allows the buttons to go to any PendingIntent. Note that you should only use this form if you know you will continue running for the full time until unregistering the PendingIntent.

Parameters
`eventReceiver` | `PendingIntent`: target that will receive media button intents. The PendingIntent will be sent an `Intent#ACTION_MEDIA_BUTTON` event when a media button action occurs, with `Intent#EXTRA_KEY_EVENT` added and holding the key code of the media button that was pressed.

### registerRemoteControlClient

    public void registerRemoteControlClient (RemoteControlClient rcClient)

This method is deprecated.
Use `MediaSession` instead.

Registers the remote control client for providing information to display on the remote controls.

Parameters
`rcClient` | `RemoteControlClient`: The remote control client from which remote controls will receive information to display.

See also:

- `RemoteControlClient`

### registerRemoteController

    public boolean registerRemoteController (RemoteController rctlr)

This method is deprecated.
Use `MediaSessionManager#addOnActiveSessionsChangedListener(android.media.session.MediaSessionManager.OnActiveSessionsChangedListener, ComponentName)` and `MediaController` instead.

Registers a `RemoteController` instance for it to receive media metadata updates and playback state information from applications using `RemoteControlClient`, and control their playback.

Registration requires the `RemoteController.OnClientUpdateListener` listener to be one of the enabled notification listeners (see `NotificationListenerService`).

Parameters
`rctlr` | `RemoteController`: the object to register.

Returns
`boolean` | true if the `RemoteController` was successfully registered, false if an error occurred, due to an internal system error, or insufficient permissions.

### removeOnCommunicationDeviceChangedListener

    public void removeOnCommunicationDeviceChangedListener (AudioManager.OnCommunicationDeviceChangedListener listener)

Removes a previously added listener of changes to the communication audio device. See `setCommunicationDevice(android.media.AudioDeviceInfo)`.

Parameters
`listener` | `AudioManager.OnCommunicationDeviceChangedListener`: This value cannot be `null`.

### removeOnModeChangedListener

    public void removeOnModeChangedListener (AudioManager.OnModeChangedListener listener)

Removes a previously added listener for changes to audio mode. See `getMode()`

Parameters
`listener` | `AudioManager.OnModeChangedListener`: This value cannot be `null`.

### requestAudioFocus

    public int requestAudioFocus (AudioFocusRequest focusRequest)

Request audio focus. See the `AudioFocusRequest` for information about the options available to configure your request, and notification of focus gain and loss.

Parameters
`focusRequest` | `AudioFocusRequest`: a `AudioFocusRequest` instance used to configure how focus is requested. This value cannot be `null`.

Returns
`int` | `AUDIOFOCUS_REQUEST_FAILED`, `AUDIOFOCUS_REQUEST_GRANTED` or `AUDIOFOCUS_REQUEST_DELAYED`. Note that the return value is never `AUDIOFOCUS_REQUEST_DELAYED` when focus is requested without building the `AudioFocusRequest` with `AudioFocusRequest.Builder#setAcceptsDelayedFocusGain(boolean)` set to `true`.

Throws
`NullPointerException` | if passed a null argument

### requestAudioFocus

    public int requestAudioFocus (AudioManager.OnAudioFocusChangeListener l,
                    int streamType,
                    int durationHint)

This method is deprecated.
use `requestAudioFocus(android.media.AudioFocusRequest)`

Request audio focus. Send a request to obtain the audio focus

Parameters
`l` | `AudioManager.OnAudioFocusChangeListener`: the listener to be notified of audio focus changes
`streamType` | `int`: the main audio stream type affected by the focus request
`durationHint` | `int`: use `AUDIOFOCUS_GAIN_TRANSIENT` to indicate this focus request is temporary, and focus will be abandonned shortly. Examples of transient requests are for the playback of driving directions, or notifications sounds. Use `AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK` to indicate also that it's ok for the previous focus owner to keep playing if it ducks its audio output. Alternatively use `AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE` for a temporary request that benefits from the system not playing disruptive sounds like notifications, for usecases such as voice memo recording, or speech recognition. Use `AUDIOFOCUS_GAIN` for a focus request of unknown duration such as the playback of a song or a video.

Returns
`int` | `AUDIOFOCUS_REQUEST_FAILED` or `AUDIOFOCUS_REQUEST_GRANTED`

### setAllowedCapturePolicy

    public void setAllowedCapturePolicy (int capturePolicy)

Specifies whether the audio played by this app may or may not be captured by other apps or the system. The default is `AudioAttributes#ALLOW_CAPTURE_BY_ALL`. There are multiple ways to set this policy:

- for each track independently, see `AudioAttributes.Builder#setAllowedCapturePolicy(int)`
- application-wide at runtime, with this method
- application-wide at build time, see `allowAudioPlaybackCapture` in the application manifest.

The most restrictive policy is always applied. See `AudioPlaybackCaptureConfiguration` for more details on which audio signals can be captured.

Parameters
`capturePolicy` | `int`: one of `AudioAttributes#ALLOW_CAPTURE_BY_ALL`, `AudioAttributes#ALLOW_CAPTURE_BY_SYSTEM`, `AudioAttributes#ALLOW_CAPTURE_BY_NONE`. Value is `AudioAttributes.ALLOW_CAPTURE_BY_ALL`, `AudioAttributes.ALLOW_CAPTURE_BY_SYSTEM`, or `AudioAttributes.ALLOW_CAPTURE_BY_NONE`

Throws
`RuntimeException` | if the argument is not a valid value.

### setBluetoothA2dpOn

    public void setBluetoothA2dpOn (boolean on)

This method is deprecated.
Do not use.

Parameters
`on` | `boolean`: set true to route A2DP audio to/from Bluetooth headset; false disable A2DP audio

### setBluetoothScoOn

    public void setBluetoothScoOn (boolean on)

Request use of Bluetooth SCO headset for communications.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

Parameters
`on` | `boolean`: set true to use bluetooth SCO for communications; false to not use bluetooth SCO for communications

### setCommunicationDevice

    public boolean setCommunicationDevice (AudioDeviceInfo device)

Selects the audio device that should be used for communication use cases, for instance voice or video calls. This method can be used by voice or video chat applications to select a different audio device than the one selected by default by the platform.

The device selection is expressed as an `AudioDeviceInfo` among devices returned by `getAvailableCommunicationDevices()`. The selection is active as long as the requesting application process lives, until `clearCommunicationDevice()` is called or until the device is disconnected. It is therefore important for applications to clear the request when a call ends or the the requesting activity or service is stopped or destroyed.

In case of simultaneous requests by multiple applications the priority is given to the application currently controlling the audio mode (see `setMode(int)`). This is the latest application having selected mode `MODE_IN_COMMUNICATION` or mode `MODE_IN_CALL`. Note that `MODE_IN_CALL` can only be selected by the main telephony application with permission `Manifest.permission.MODIFY_PHONE_STATE`.

If the requested devices is not currently available, the request will be rejected and the method will return false.

This API replaces the following deprecated APIs:

- `startBluetoothSco()`
- `stopBluetoothSco()`
- `setSpeakerphoneOn(boolean)`

#### Example

The example below shows how to enable and disable speakerphone mode.

     // Get an AudioManager instance
     AudioManager audioManager = Context.getSystemService(AudioManager.class);
     AudioDeviceInfo speakerDevice = null;
     List devices = audioManager.getAvailableCommunicationDevices();
     for (AudioDeviceInfo device : devices) {
         if (device.getType() == AudioDeviceInfo.TYPE_BUILTIN_SPEAKER) {
             speakerDevice = device;
             break;
         }
     }
     if (speakerDevice != null) {
         // Turn speakerphone ON.
         boolean result = audioManager.setCommunicationDevice(speakerDevice);
         if (!result) {
             // Handle error.
         }
         // Turn speakerphone OFF.
         audioManager.clearCommunicationDevice();
     }

Parameters
`device` | `AudioDeviceInfo`: the requested audio device. This value cannot be `null`.

Returns
`boolean` | `true` if the request was accepted, `false` otherwise.

Throws
`IllegalArgumentException` | If an invalid device is specified.

### setEncodedSurroundMode

    public boolean setEncodedSurroundMode (int mode)

Sets the surround sound mode.
Requires `Manifest.permission.WRITE_SETTINGS`

Parameters
`mode` | `int`: Value is `ENCODED_SURROUND_OUTPUT_UNKNOWN`, `ENCODED_SURROUND_OUTPUT_AUTO`, `ENCODED_SURROUND_OUTPUT_NEVER`, `ENCODED_SURROUND_OUTPUT_ALWAYS`, or `ENCODED_SURROUND_OUTPUT_MANUAL`

Returns
`boolean` | true if successful, otherwise false

### setMicrophoneMute

    public void setMicrophoneMute (boolean on)

Sets the microphone mute on or off.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

Parameters
`on` | `boolean`: set true to mute the microphone; false to turn mute off

### setMode

    public void setMode (int mode)

Sets the audio mode.

The audio mode encompasses audio routing AND the behavior of the telephony layer. Therefore this method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application. In particular, the `MODE_IN_CALL` mode should only be used by the telephony application when it places a phone call, as it will cause signals from the radio layer to feed the platform mixer.

Parameters
`mode` | `int`: the requested audio mode. Informs the HAL about the current audio state so that it can route the audio appropriately. Value is `MODE_NORMAL`, `MODE_RINGTONE`, `MODE_IN_CALL`, `MODE_IN_COMMUNICATION`, or `MODE_CALL_SCREENING`

### setParameters

    public void setParameters (String keyValuePairs)

Sets a variable number of parameter values to audio hardware.

Parameters
`keyValuePairs` | `String`: list of parameters key value pairs in the form: key1=value1;key2=value2;...

### setRingerMode

    public void setRingerMode (int ringerMode)

Sets the ringer mode.

Silent mode will mute the volume and will not vibrate. Vibrate mode will mute the volume and vibrate. Normal mode will be audible and may vibrate according to user settings.

This method has no effect if the device implements a fixed volume policy as indicated by `isVolumeFixed()`. *

From N onward, ringer mode adjustments that would toggle Do Not Disturb are not allowed unless the app has been granted Do Not Disturb Access. See `NotificationManager#isNotificationPolicyAccessGranted()`.

Parameters
`ringerMode` | `int`: The ringer mode, one of `RINGER_MODE_NORMAL`, `RINGER_MODE_SILENT`, or `RINGER_MODE_VIBRATE`.

See also:

- `getRingerMode()`
- `isVolumeFixed()`

### setRouting

    public void setRouting (int mode,
                    int routes,
                    int mask)

This method is deprecated.
Do not set audio routing directly, use setSpeakerphoneOn(), setBluetoothScoOn() methods instead.

Sets the audio routing for a specified mode

Parameters
`mode` | `int`: audio mode to change route. E.g., MODE_RINGTONE.
`routes` | `int`: bit vector of routes requested, created from one or more of ROUTE_xxx types. Set bits indicate that route should be on
`mask` | `int`: bit vector of routes to change, created from one or more of ROUTE_xxx types. Unset bits indicate the route should be left unchanged

### setSpeakerphoneOn

    public void setSpeakerphoneOn (boolean on)

Sets the speakerphone on or off.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

Parameters
`on` | `boolean`: set true to turn on speakerphone; false to turn it off

### setStreamMute

    public void setStreamMute (int streamType,
                    boolean state)

This method is deprecated.
Use `adjustStreamVolume(int, int, int)` with `ADJUST_MUTE` or `ADJUST_UNMUTE` instead.

Mute or unmute an audio stream.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

This method has no effect if the device implements a fixed volume policy as indicated by `isVolumeFixed()`.

This method was deprecated in API level 22. Prior to API level 22 this method had significantly different behavior and should be used carefully. The following applies only to pre-22 platforms:

- The mute command is protected against client process death: if a process with an active mute request on a stream dies, this stream will be unmuted automatically.
- The mute requests for a given stream are cumulative: the AudioManager can receive several mute requests from one or more clients and the stream will be unmuted only when the same number of unmute requests are received.
- For a better user experience, applications MUST unmute a muted stream in onPause() and mute is again in onResume() if appropriate.

Parameters
`streamType` | `int`: The stream to be muted/unmuted.
`state` | `boolean`: The required mute state: true for mute ON, false for mute OFF

See also:

- `isVolumeFixed()`

### setStreamSolo

    public void setStreamSolo (int streamType,
                    boolean state)

This method is deprecated.
Do not use. If you need exclusive audio playback use `requestAudioFocus(AudioFocusRequest)`.

Solo or unsolo a particular stream.

Do not use. This method has been deprecated and is now a no-op. `requestAudioFocus(AudioFocusRequest)` should be used for exclusive audio playback.

Parameters
`streamType` | `int`: The stream to be soloed/unsoloed.
`state` | `boolean`: The required solo state: true for solo ON, false for solo OFF

See also:

- `isVolumeFixed()`

### setStreamVolume

    public void setStreamVolume (int streamType,
                    int index,
                    int flags)

Sets the volume index for a particular stream.

This method has no effect if the device implements a fixed volume policy as indicated by `isVolumeFixed()`.

From N onward, volume adjustments that would toggle Do Not Disturb are not allowed unless the app has been granted Do Not Disturb Access. See `NotificationManager#isNotificationPolicyAccessGranted()`.

Parameters
`streamType` | `int`: The stream whose volume index should be set.
`index` | `int`: The volume index to set. See `getStreamMaxVolume(int)` for the largest valid value.
`flags` | `int`: One or more flags.

Throws
`SecurityException` | if the volume change triggers a Do Not Disturb change and the caller is not granted notification policy access.

See also:

- `getStreamMaxVolume(int)`
- `getStreamVolume(int)`
- `isVolumeFixed()`

### setSurroundFormatEnabled

    public boolean setSurroundFormatEnabled (int audioFormat,
                    boolean enabled)

Sets and persists a certain surround format as enabled or not.

This API is called by TvSettings surround sound menu when user enables or disables a surround sound format. This setting is persisted as global user setting. Applications should revert their changes to surround sound settings unless they intend to modify the global user settings across all apps. The framework does not auto-revert an application's settings after a lifecycle event. Audio focus is not required to apply these settings.
Requires `Manifest.permission.WRITE_SETTINGS`

Parameters
`audioFormat` | `int`: Value is `AudioFormat.ENCODING_AC3`, `AudioFormat.ENCODING_E_AC3`, `AudioFormat.ENCODING_DTS`, `AudioFormat.ENCODING_DTS_HD`, `AudioFormat.ENCODING_AAC_LC`, `AudioFormat.ENCODING_DOLBY_TRUEHD`, `AudioFormat.ENCODING_AC4`, `AudioFormat.ENCODING_E_AC3_JOC`, `AudioFormat.ENCODING_DOLBY_MAT`, `AudioFormat.ENCODING_MPEGH_BL_L3`, `AudioFormat.ENCODING_MPEGH_BL_L4`, `AudioFormat.ENCODING_MPEGH_LC_L3`, `AudioFormat.ENCODING_MPEGH_LC_L4`, `AudioFormat.ENCODING_DTS_UHD`, or `AudioFormat.ENCODING_DRA`
`enabled` | `boolean`: the required surround format state, true for enabled, false for disabled

Returns
`boolean` | true if successful, otherwise false

### setVibrateSetting

    public void setVibrateSetting (int vibrateType,
                    int vibrateSetting)

This method is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Sets the setting for when the vibrate type should vibrate.

This method should only be used by applications that replace the platform-wide management of audio settings or the main telephony application.

Parameters
`vibrateType` | `int`: The type of vibrate. One of `VIBRATE_TYPE_NOTIFICATION` or `VIBRATE_TYPE_RINGER`.
`vibrateSetting` | `int`: The vibrate setting, one of `VIBRATE_SETTING_ON`, `VIBRATE_SETTING_OFF`, or `VIBRATE_SETTING_ONLY_SILENT`.

See also:

- `getVibrateSetting(int)`
- `shouldVibrate(int)`

### setWiredHeadsetOn

    public void setWiredHeadsetOn (boolean on)

This method is deprecated.
Do not use.

Sets audio routing to the wired headset on or off.

Parameters
`on` | `boolean`: set true to route audio to/from wired headset; false disable wired headset audio

### shouldVibrate

    public boolean shouldVibrate (int vibrateType)

This method is deprecated.
Applications should maintain their own vibrate policy based on current ringer mode that can be queried via `getRingerMode()`.

Returns whether a particular type should vibrate according to user settings and the current ringer mode.

This shouldn't be needed by most clients that use notifications to vibrate. The notification manager will not vibrate if the policy doesn't allow it, so the client should always set a vibrate pattern and let the notification manager control whether or not to actually vibrate.

Parameters
`vibrateType` | `int`: The type of vibrate. One of `VIBRATE_TYPE_NOTIFICATION` or `VIBRATE_TYPE_RINGER`.

Returns
`boolean` | Whether the type should vibrate at the instant this method is called.

See also:

- `setVibrateSetting(int, int)`
- `getVibrateSetting(int)`

### startBluetoothSco

    public void startBluetoothSco ()

Start bluetooth SCO audio connection.

Requires Permission: `Manifest.permission.MODIFY_AUDIO_SETTINGS`.

This method can be used by applications wanting to send and received audio to/from a bluetooth SCO headset while the phone is not in call.

As the SCO connection establishment can take several seconds, applications should not rely on the connection to be available when the method returns but instead register to receive the intent `ACTION_SCO_AUDIO_STATE_UPDATED` and wait for the state to be `SCO_AUDIO_STATE_CONNECTED`.

As the ACTION_SCO_AUDIO_STATE_UPDATED intent is sticky, the application can check the SCO audio state before calling startBluetoothSco() by reading the intent returned by the receiver registration. If the state is already CONNECTED, no state change will be received via the intent after calling startBluetoothSco(). It is however useful to call startBluetoothSco() so that the connection stays active in case the current initiator stops the connection.

Unless the connection is already active as described above, the state will always transition from DISCONNECTED to CONNECTING and then either to CONNECTED if the connection succeeds or back to DISCONNECTED if the connection fails (e.g no headset is connected).

When finished with the SCO connection or if the establishment fails, the application must call `stopBluetoothSco()` to clear the request and turn down the bluetooth connection.

Even if a SCO connection is established, the following restrictions apply on audio output streams so that they can be routed to SCO headset:

- the stream type must be `STREAM_VOICE_CALL`
- the format must be mono
- the sampling must be 16kHz or 8kHz

The following restrictions apply on input streams:

- the format must be mono
- the sampling must be 8kHz

Note that the phone application always has the priority on the usage of the SCO connection for telephony. If this method is called while the phone is in call it will be ignored. Similarly, if a call is received or sent while an application is using the SCO connection, the connection will be lost for the application and NOT returned automatically when the call ends.

NOTE: up to and including API version `Build.VERSION_CODES.JELLY_BEAN_MR1`, this method initiates a virtual voice call to the bluetooth headset. After API version `Build.VERSION_CODES.JELLY_BEAN_MR2` only a raw SCO audio connection is established.

See also:

- `stopBluetoothSco()`
- `ACTION_SCO_AUDIO_STATE_UPDATED`

### stopBluetoothSco

    public void stopBluetoothSco ()

Stop bluetooth SCO audio connection.

Requires Permission: `Manifest.permission.MODIFY_AUDIO_SETTINGS`.

This method must be called by applications having requested the use of bluetooth SCO audio with `startBluetoothSco()` when finished with the SCO connection or if connection fails.

See also:

- `startBluetoothSco()`

### unloadSoundEffects

    public void unloadSoundEffects ()

Unload Sound effects. This method can be called to free some memory when sound effects are disabled.

### unregisterAudioDeviceCallback

    public void unregisterAudioDeviceCallback (AudioDeviceCallback callback)

Unregisters an `AudioDeviceCallback` object which has been previously registered to receive notifications of changes to the set of connected audio devices.

Parameters
`callback` | `AudioDeviceCallback`: The `AudioDeviceCallback` object that was previously registered with `AudioManager#registerAudioDeviceCallback` to be unregistered.

### unregisterAudioPlaybackCallback

    public void unregisterAudioPlaybackCallback (AudioManager.AudioPlaybackCallback cb)

Unregister an audio playback callback previously registered with `registerAudioPlaybackCallback(android.media.AudioManager.AudioPlaybackCallback, android.os.Handler)`.

Parameters
`cb` | `AudioManager.AudioPlaybackCallback`: non-null callback to unregister This value cannot be `null`.

### unregisterAudioRecordingCallback

    public void unregisterAudioRecordingCallback (AudioManager.AudioRecordingCallback cb)

Unregister an audio recording callback previously registered with `registerAudioRecordingCallback(android.media.AudioManager.AudioRecordingCallback, android.os.Handler)`.

Parameters
`cb` | `AudioManager.AudioRecordingCallback`: non-null callback to unregister This value cannot be `null`.

### unregisterMediaButtonEventReceiver

    public void unregisterMediaButtonEventReceiver (PendingIntent eventReceiver)

This method is deprecated.
Use `MediaSession` instead.

Unregister the receiver of MEDIA_BUTTON intents.

Parameters
`eventReceiver` | `PendingIntent`: same PendingIntent that was registed with `registerMediaButtonEventReceiver(android.app.PendingIntent)`.

### unregisterMediaButtonEventReceiver

    public void unregisterMediaButtonEventReceiver (ComponentName eventReceiver)

This method is deprecated.
Use `MediaSession` instead.

Unregister the receiver of MEDIA_BUTTON intents.

Parameters
`eventReceiver` | `ComponentName`: identifier of a `BroadcastReceiver` that was registered with `registerMediaButtonEventReceiver(android.content.ComponentName)`.

### unregisterRemoteControlClient

    public void unregisterRemoteControlClient (RemoteControlClient rcClient)

This method is deprecated.
Use `MediaSession` instead.

Unregisters the remote control client that was providing information to display on the remote controls.

Parameters
`rcClient` | `RemoteControlClient`: The remote control client to unregister.

See also:

- `registerRemoteControlClient(RemoteControlClient)`

### unregisterRemoteController

    public void unregisterRemoteController (RemoteController rctlr)

This method is deprecated.
Use `MediaSessionManager#removeOnActiveSessionsChangedListener(android.media.session.MediaSessionManager.OnActiveSessionsChangedListener)` instead.

Unregisters a `RemoteController`, causing it to no longer receive media metadata and playback state information, and no longer be capable of controlling playback.

Parameters
`rctlr` | `RemoteController`: the object to unregister.

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