CarAudioManager.CarVolumeCallback

public static abstract class CarAudioManager.CarVolumeCallback
extends Object

java.lang.Object
↳	android.car.media.CarAudioManager.CarVolumeCallback

Callback interface to receive volume change events in a car. Extend this class and register it with CarAudioManager.registerCarVolumeCallback(android.car.media.CarAudioManager.CarVolumeCallback) and unregister it via CarAudioManager.unregisterCarVolumeCallback(android.car.media.CarAudioManager.CarVolumeCallback)

Summary

Public constructors
`CarVolumeCallback()`

Public methods
`void`	`onGroupVolumeChanged(int zoneId, int groupId, int flags)` This is called whenever a group volume is changed.
`void`	`onMasterMuteChanged(int zoneId, int flags)` This is called whenever the master mute state is changed.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()`
`boolean`	`equals(Object arg0)`
`void`	`finalize()`
`final Class<?>`	`getClass()`
`int`	`hashCode()`
`final void`	`notify()`
`final void`	`notifyAll()`
`String`	`toString()`
`final void`	`wait(long arg0, int arg1)`
`final void`	`wait(long arg0)`
`final void`	`wait()`

Public constructors

CarVolumeCallback

public CarVolumeCallback ()

Public methods

onGroupVolumeChanged

Added in API level 29

public void onGroupVolumeChanged (int zoneId, 
                int groupId, 
                int flags)

This is called whenever a group volume is changed. The changed-to volume index is not included, the caller is encouraged to get the current group volume index via CarAudioManager.

Parameters
`zoneId`	`int`: Id of the audio zone that volume change happens
`groupId`	`int`: Id of the volume group that volume is changed
`flags`	`int`: see `AudioManager` for flag definitions

onMasterMuteChanged

Added in API level 29

public void onMasterMuteChanged (int zoneId, 
                int flags)

This is called whenever the master mute state is changed. The changed-to master mute state is not included, the caller is encouraged to get the current master mute state via AudioManager.

Parameters
`zoneId`	`int`: Id of the audio zone that master mute state change happens
`flags`	`int`: see `AudioManager` for flag definitions