# MultiMedia\_CameraDeviceCallback<a name="ZH-CN_TOPIC_0000001057476961"></a>

-   [Overview](#section416119496165625)
-   [Summary](#section1288812454165625)
-   [Files](#files)
-   [Data Structures](#nested-classes)
-   [Functions](#func-members)
-   [Details](#section1524132779165625)
-   [Function](#section2055406260165625)
-   [CameraDeviceCallback\(\)](#ga5e81f9fa5dd53d9d1f8ca0cc4497fd59)
-   [OnCameraStatus\(\)](#ga2ae4d3d8ae13f73986f8dc7cf4bb7960)
-   [\~CameraDeviceCallback\(\)](#gac88b6972227ec2ba65feeb15c31aea83)

## **Overview**<a name="section416119496165625"></a>

**Description:**

Defines the  **CameraDeviceCallback**  class to response to device changes. 

**Since:**

1.0

**Version:**

1.0

## **Summary**<a name="section1288812454165625"></a>

## Files<a name="files"></a>

<a name="table718837617165625"></a>
<table><thead align="left"><tr id="row147843884165625"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p1462975003165625"><a name="p1462975003165625"></a><a name="p1462975003165625"></a>File Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p608776383165625"><a name="p608776383165625"></a><a name="p608776383165625"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row363917246165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p865100287165625"><a name="p865100287165625"></a><a name="p865100287165625"></a><a href="camera_device_callback-h.md">camera_device_callback.h</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1971433287165625"><a name="p1971433287165625"></a><a name="p1971433287165625"></a>Declares functions in the <strong id="b428333906165625"><a name="b428333906165625"></a><a name="b428333906165625"></a>CameraDeviceCallback</strong> class to response to device changes. </p>
</td>
</tr>
</tbody>
</table>

## Data Structures<a name="nested-classes"></a>

<a name="table853346078165625"></a>
<table><thead align="left"><tr id="row1500707927165625"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p1195456100165625"><a name="p1195456100165625"></a><a name="p1195456100165625"></a>Data Structure Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p996452165165625"><a name="p996452165165625"></a><a name="p996452165165625"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row1303711626165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1681406799165625"><a name="p1681406799165625"></a><a name="p1681406799165625"></a><a href="OHOS-Media-CameraDeviceCallback.md">OHOS::Media::CameraDeviceCallback</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p239829102165625"><a name="p239829102165625"></a><a name="p239829102165625"></a>Provides functions to response to device changes. </p>
</td>
</tr>
</tbody>
</table>

## Functions<a name="func-members"></a>

<a name="table676524119165625"></a>
<table><thead align="left"><tr id="row1787115963165625"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p370194005165625"><a name="p370194005165625"></a><a name="p370194005165625"></a>Function</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p1119793100165625"><a name="p1119793100165625"></a><a name="p1119793100165625"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row1330078233165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1363718591165625"><a name="p1363718591165625"></a><a name="p1363718591165625"></a><a href="MultiMedia_CameraDeviceCallback.md#ga5e81f9fa5dd53d9d1f8ca0cc4497fd59">OHOS::Media::CameraDeviceCallback::CameraDeviceCallback</a> ()=default</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p714913040165625"><a name="p714913040165625"></a><a name="p714913040165625"></a> </p>
<p id="p912141723165625"><a name="p912141723165625"></a><a name="p912141723165625"></a>A constructor used to create a <strong id="b2035762557165625"><a name="b2035762557165625"></a><a name="b2035762557165625"></a><a href="OHOS-Media-CameraDeviceCallback.md">CameraDeviceCallback</a></strong> instance. </p>
</td>
</tr>
<tr id="row408125046165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1899801123165625"><a name="p1899801123165625"></a><a name="p1899801123165625"></a><a href="MultiMedia_CameraDeviceCallback.md#gac88b6972227ec2ba65feeb15c31aea83">OHOS::Media::CameraDeviceCallback::~CameraDeviceCallback</a> ()=default</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1513328343165625"><a name="p1513328343165625"></a><a name="p1513328343165625"></a>virtual </p>
<p id="p1826272842165625"><a name="p1826272842165625"></a><a name="p1826272842165625"></a>A destructor used to delete the <strong id="b1366939226165625"><a name="b1366939226165625"></a><a name="b1366939226165625"></a><a href="OHOS-Media-CameraDeviceCallback.md">CameraDeviceCallback</a></strong> instance. </p>
</td>
</tr>
<tr id="row1509074862165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1826501925165625"><a name="p1826501925165625"></a><a name="p1826501925165625"></a><a href="MultiMedia_CameraDeviceCallback.md#ga2ae4d3d8ae13f73986f8dc7cf4bb7960">OHOS::Media::CameraDeviceCallback::OnCameraStatus</a> (std::string cameraId, int32_t status)</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p2058845824165625"><a name="p2058845824165625"></a><a name="p2058845824165625"></a>virtual void </p>
<p id="p1788541084165625"><a name="p1788541084165625"></a><a name="p1788541084165625"></a>Called when the camera state changes. </p>
</td>
</tr>
</tbody>
</table>

## **Details**<a name="section1524132779165625"></a>

## **Function **<a name="section2055406260165625"></a>

## CameraDeviceCallback\(\)<a name="ga5e81f9fa5dd53d9d1f8ca0cc4497fd59"></a>

```
OHOS::Media::CameraDeviceCallback::CameraDeviceCallback ()
```

 **Description:**

A constructor used to create a  **[CameraDeviceCallback](OHOS-Media-CameraDeviceCallback.md)**  instance. 

## OnCameraStatus\(\)<a name="ga2ae4d3d8ae13f73986f8dc7cf4bb7960"></a>

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

 **Description:**

Called when the camera state changes. 

**Parameters:**

<a name="table701818719165625"></a>
<table><thead align="left"><tr id="row666439324165625"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p132476156165625"><a name="p132476156165625"></a><a name="p132476156165625"></a>Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p734435275165625"><a name="p734435275165625"></a><a name="p734435275165625"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row2045950538165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 ">cameraId</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 ">Indicates the camera ID. </td>
</tr>
<tr id="row1639069758165625"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 ">status</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 ">Indicates the camera state. </td>
</tr>
</tbody>
</table>

## \~CameraDeviceCallback\(\)<a name="gac88b6972227ec2ba65feeb15c31aea83"></a>

```
virtual OHOS::Media::CameraDeviceCallback::~CameraDeviceCallback ()
```

 **Description:**

A destructor used to delete the  **[CameraDeviceCallback](OHOS-Media-CameraDeviceCallback.md)**  instance.