AudioEvent

音频事件枚举 每个值代表可能发生的不同类型的音频更改事件，例如，每当音量增大或减小时，就会发生VOLUME_UPDATE。这些事件会被发送给注册的回调。

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枚举成员

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DEVICE_STATE_UPDATE

DEVICE_STATE_UPDATE: 0

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VOLUME_UPDATE

VOLUME_UPDATE: 1

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GLOBAL_VOLUME_MUTE_UPDATE

GLOBAL_VOLUME_MUTE_UPDATE: 2

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SERVER_DOWN

SERVER_DOWN: 3

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SERVER_UP

SERVER_UP: 4

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AUDIO_USAGE_STATE_CHANGE

AUDIO_USAGE_STATE_CHANGE: 5

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MIC_MUTE_STATE_UPDATE

MIC_MUTE_STATE_UPDATE: 6

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VOLUME_MUTE_UPDATE

VOLUME_MUTE_UPDATE: 7

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TELEPHONY_MUTE_UPDATE

TELEPHONY_MUTE_UPDATE: 8

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