类：SystemVolumeChangedEvent
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最后更新时间 (UTC)：2025-07-25。
[null,null,["最后更新时间 (UTC)：2025-07-25。"],[[["\u003cp\u003e\u003ccode\u003eSystemVolumeChangedEvent\u003c/code\u003e is dispatched when the system volume level is changed.\u003c/p\u003e\n"],["\u003cp\u003eIt provides the updated volume data through the \u003ccode\u003edata\u003c/code\u003e property, which is of type \u003ccode\u003eSystemVolumeData\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe event is initiated by \u003ccode\u003eCastReceiverContext\u003c/code\u003e and extends the \u003ccode\u003eEvent\u003c/code\u003e class.\u003c/p\u003e\n"],["\u003cp\u003eThis event's \u003ccode\u003etype\u003c/code\u003e property is set to \u003ccode\u003eEventType.SYSTEM_VOLUME_CHANGED\u003c/code\u003e.\u003c/p\u003e\n"]]],["The `SystemVolumeChangedEvent` is dispatched by `cast.framework.CastReceiverContext` when the system volume is altered. This event, extending `cast.framework.system.Event`, contains `SystemVolumeData`. The `SystemVolumeChangedEvent` constructor requires a non-null `SystemVolumeData` parameter. It has a 'data' property holding the volume information and a 'type' property indicating the event type, inherited from `cast.framework.system.Event`.\n"],null,["# Class: SystemVolumeChangedEvent\n\ncast.[framework](/cast/docs/reference/web_receiver/cast.framework).[system](/cast/docs/reference/web_receiver/cast.framework.system).SystemVolumeChangedEvent\n=============================================================================================================================================================\n\nclass static\n\nAn event dispatched by [cast.framework.CastReceiverContext](/cast/docs/reference/web_receiver/cast.framework.CastReceiverContext) when the\nsystem volume changes.\n\nConstructor\n-----------\n\n### SystemVolumeChangedEvent\n\nnew\nSystemVolumeChangedEvent(volume)\n\n| #### Parameter ||\n|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| volume | [cast.framework.system.SystemVolumeData](/cast/docs/reference/web_receiver/cast.framework.system.SystemVolumeData) The system volume data. Value must not be null. |\n\nExtends\n: [cast.framework.system.Event](/cast/docs/reference/web_receiver/cast.framework.system.Event)\n\nProperties\n----------\n\n### data\n\nnon-null [cast.framework.system.SystemVolumeData](/cast/docs/reference/web_receiver/cast.framework.system.SystemVolumeData)\n\nThe system volume data.\n\n### type\n\nnon-null [cast.framework.system.EventType](/cast/docs/reference/web_receiver/cast.framework.system#.EventType)\n\nThe event type.\n\nInherited from\n: [cast.framework.system.Event#type](/cast/docs/reference/web_receiver/cast.framework.system.Event#type)"]]
