给我写一个基于QT的用蓝牙连接操作的安卓手机APP软件代码

### 回答1：

我将为您提供一个基于Qt的安卓手机APP软件的代码，使用蓝牙连接操作：#include <QtBluetooth/QBluetoothLocalDevice>
#include <QtBluetooth/QBluetoothServiceInfo>
#include <QtBluetooth/QBluetoothSocket>class BluetoothService : public QObject
{
Q_OBJECT
public:
BluetoothService(QObject *parent = nullptr); void startService(const QBluetoothUuid &uuid);
void stopService();signals:
void serviceStarted();
void serviceStopped();private slots:
void onSocketConnected();private:
QBluetoothLocalDevice m_localDevice;
QBluetoothServiceInfo m_serviceInfo;
QBluetoothSocket *m_socket;
};BluetoothService::BluetoothService(QObject *parent)
: QObject(parent)
, m_socket(nullptr)
{
}void BluetoothService::startService(const QBluetoothUuid &uuid)
{
// Check if Bluetooth is available on this device
if (!m_localDevice.isValid()) {
qWarning() << "Bluetooth is not available on this device";
return;
} // Make it visible to others
m_localDevice.powerOn();
m_localDevice.setHostMode(QBluetoothLocalDevice::HostDiscoverable); // Create a service info
m_serviceInfo.setUuid(uuid);
m_serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceName,
tr("My Bluetooth Service"));
m_serviceInfo.setAttribute(QBluetoothServiceInfo::ServiceDescription,
tr("An example Bluetooth service"));
m_serviceInfo.setAttribute(
QBluetoothServiceInfo::ServiceAvailability,
QBluetoothServiceInfo::Unavailable); // Create a socket
m_socket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol); // Connect to the socket
connect(m_socket, &QBluetoothSocket::connected,
this, &BluetoothService::onSocketConnected); // Register the service
m_serviceInfo.registerService(m_socket); // Emit the service started signal
emit serviceStarted();
}void BluetoothService::stopService()
{
// Unregister service
m_serviceInfo.unregisterService(); // Close the socket
m_socket->close(); // Power off the local device
m_localDevice.setHostMode(QBluetoothLocalDevice::HostPoweredOff); // Delete the socket
delete m_socket; // Emit the service stopped signal
emit serviceStopped();
}void BluetoothService::onSocketConnected()
{
// Set the service availability to available
m_serviceInfo.setAttribute(
QBluetoothServiceInfo::ServiceAvailability,
QBluetoothServiceInfo::Available);
}

### 回答2：
给你编写一个完整的基于QT的安卓手机APP软件代码是不太可能的，因为它需要考虑到许多因素，如UI设计、功能要求以及蓝牙通信协议等等。下面是一个简单的示例代码，用于演示如何使用QT和蓝牙连接操作：

#include <QCoreApplication>
#include <QBluetoothDeviceDiscoveryAgent>
#include <QBluetoothServiceDiscoveryAgent>
#include <QDebug>

class BluetoothManager : public QObject
{
    Q_OBJECT

public:
    explicit BluetoothManager(QObject *parent = nullptr)
        : QObject(parent)
    {
        discoveryAgent = new QBluetoothDeviceDiscoveryAgent(this);
        connect(discoveryAgent, &QBluetoothDeviceDiscoveryAgent::deviceDiscovered,
                this, &BluetoothManager::deviceDiscovered);
        discoveryAgent->start();
    }

public slots:
    void deviceDiscovered(const QBluetoothDeviceInfo &device) const
    {
        qDebug() << "Discovered device: " << device.name() << "\n";
        // 连接设备并执行操作
    }

private:
    QBluetoothDeviceDiscoveryAgent *discoveryAgent;
};

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    BluetoothManager manager;
    // ...
    // 其他应用逻辑

    return a.exec();
}

#include "main.moc"

这个简单的代码片段实现了使用QT和蓝牙设备发现代理来扫描可用的蓝牙设备。当发现新设备时，通过输出调试信息来显示设备的名称。你可以根据你的具体需求和功能要求来扩展这些代码，例如添加UI界面、连接设备并发送接收数据等。

需要注意的是，此示例代码仅仅是一个基础的起点，具体实现还需要根据你的具体需求进行定制。如果希望开发一个完整的安卓手机APP，建议使用QT提供的移动开发框架QML，它提供了更多的UI控件和工具来简化开发过程。另外，还需要学习和理解蓝牙通信协议和相关技术，以确保与蓝牙设备的正确交互。