# MuiltiMedia\_CameraDeviceCallback ## **Overview** Defines the **CameraDeviceCallback** class to response to device changes. **Since:** 1.0 **Version:** 1.0 ## **Summary** ## Files

File Name

Description

camera_device_callback.h

Declares functions in the CameraDeviceCallback class to response to device changes.

## Data Structures

Data Structure Name

Description

OHOS::Media::CameraDeviceCallback

Provides functions to response to device changes.

## Functions

Function Name

Description

OHOS::Media::CameraDeviceCallback::CameraDeviceCallback ()=default

 

A constructor used to create a CameraDeviceCallback instance.

OHOS::Media::CameraDeviceCallback::~CameraDeviceCallback ()=default

virtual 

A destructor used to delete the CameraDeviceCallback instance.

OHOS::Media::CameraDeviceCallback::OnCameraStatus (std::string cameraId, int32_t status)

virtual void 

Called when the camera state changes.

## **Details** ## **Function Documentation** ## CameraDeviceCallback\(\) ``` OHOS::Media::CameraDeviceCallback::CameraDeviceCallback () ``` **Description:** A constructor used to create a **[CameraDeviceCallback](OHOS-Media-CameraDeviceCallback.md)** instance. ## OnCameraStatus\(\) ``` virtual void OHOS::Media::CameraDeviceCallback::OnCameraStatus (std::string cameraId, int32_t status ) ``` **Description:** Called when the camera state changes. **Parameters:**

Name

Description
cameraId Indicates the camera ID.
status Indicates the camera state.
## \~CameraDeviceCallback\(\) ``` virtual OHOS::Media::CameraDeviceCallback::~CameraDeviceCallback () ``` **Description:** A destructor used to delete the **[CameraDeviceCallback](OHOS-Media-CameraDeviceCallback.md)** instance.