qt c++ 判断蓝牙是否连接
时间: 2024-09-14 15:08:21 浏览: 96
qt界面C++连接蓝牙手环测心率血压血氧
在Qt C++中,判断蓝牙设备是否已连接通常需要使用QBluetooth模块。首先,你需要创建一个QBluetoothDeviceDiscoveryAgent实例,然后开始扫描并检查是否有可用的蓝牙设备。以下是一个简单的步骤:
1. 包含必要的头文件:
```cpp
#include <QtBluetooth/QBluetooth>
#include <QtBluetooth/QBluetoothAddress>
```
2. 创建QBluetoothDeviceDiscoveryAgent实例:
```cpp
QBluetoothDeviceDiscoveryAgent* discoveryAgent = new QBluetoothDeviceDiscoveryAgent(this);
discoveryAgent->setSearchMode(QBluetoothDeviceDiscoveryAgent::DevicesOnly);
```
3. 开始搜索蓝牙设备:
```cpp
connect(discoveryAgent, &QBluetoothDeviceDiscoveryAgent::newDeviceAvailable, this, &YourClass::deviceFound);
discoveryAgent->start();
```
4. 定义deviceFound()函数来处理新发现的设备:
```cpp
void YourClass::deviceFound(const QBluetoothDeviceInfo& deviceInfo)
{
if (deviceInfo.name().contains("your_device_name")) { // 检查你想连接的设备名称
bool isConnected = deviceInfo.state() == QBluetoothDeviceInfo::Connected; // 判断设备是否已连接
if (isConnected) {
qDebug() << "蓝牙设备已连接";
} else {
qDebug() << "蓝牙设备未连接";
}
}
}
```
5. 结束搜索时停止代理:
```cpp
discoveryAgent->stop();
delete discoveryAgent;
```
阅读全文