如何检测当前相机服务的状态

import { camera } from '@kit.CameraKit'; 
import { BusinessError } from '@kit.BasicServicesKit'; 
 
function registerCameraStatus(cameraManager: camera.CameraManager): void { 
  cameraManager.on('cameraStatus', (err: BusinessError, cameraStatusInfo: camera.CameraStatusInfo) => { 
    console.log(`camera : ${cameraStatusInfo.camera.cameraId}`); 
    console.log(`status: ${cameraStatusInfo.status}`); 
  }); 
}
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