如何调用相机开放的接口，拍照并获取拍照的图片uri

imageReceiver.on('imageArrival', () => { 
  imageReceiver.readNextImage((err: BusinessError, nextImage: image.Image) => { 
    if (err || nextImage === undefined) { 
      return; 
    } 
    nextImage.getComponent(image.ComponentType.JPEG, async (err: BusinessError, imgComponent: image.Component) => { 
      if (err || imgComponent === undefined) { 
        return; 
      } 
      if (imgComponent.byteBuffer as ArrayBuffer) { 
        console.info(TAG, "接收到图片数据[" + imgComponent.byteBuffer.byteLength + "]") 
        let imageName = "IMG_" + Date.parse(new Date().toString()) + ".jpg"; 
        let context = getContext() as common.UIAbilityContext; 
        let path = context.filesDir + "/" + imageName; 
 
        console.info(TAG, "图片路径:" + path); 
        ...... 
      } 
      nextImage.release() 
    } else { 
      return; 
    } 
  }) 
 }) 
})
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