| xiaolanchong |
2018-05-22 21:29 |
楼主，我的为什么连蓝牙设备都找不到，代码看来看去都没问题
#include "Bluetooth.h"
#include "ui_Bluetooth.h"
static const QLatin1String serviceUuid("00001101-0000-1000-8000-00805F9B34FB");
Bluetooth::Bluetooth(QWidget *parent) :
QWidget(parent), localDevice(new QBluetoothLocalDevice),
ui(new Ui::Bluetooth)
{
ui->setupUi(this);
// localDevice = new QBluetoothLocalDevice();
discoveryAgent = new QBluetoothDeviceDiscoveryAgent();
/* 判断蓝牙是否开启，若开启则不可被选中 扫描周围蓝牙设备 */
if( localDevice->hostMode() == QBluetoothLocalDevice::HostPoweredOff)
{
ui->pushButton_openBluetooth->setEnabled(true);
ui->pushButton_upDate->setEnabled(false);
}
else
{
ui->pushButton_openBluetooth->setEnabled(false);
discoveryAgent->start();
}
/* 给socket分配内存，限定套接字协议 */
socket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);
/* 发现设备时会触发deviceDiscovered信号，转到槽显示设备 */
connect(discoveryAgent, SIGNAL(deviceDiscovered(QBluetoothDeviceInfo)),
this, SLOT(addBlueToothDevicesToList(QBluetoothDeviceInfo)));
connect(discoveryAgent, SIGNAL(finished()), this, SLOT(upDateFinish()));
/* 点击显示的蓝牙转到连接槽 */
connect(ui->listWidget_displayBluetoothDevice, SIGNAL(itemClicked(QListWidgetItem*)),
this, SLOT(bluetoothConnect(QlistWidgetItem*)));
}
Bluetooth::~Bluetooth()
{
delete ui;
}
/* 打开蓝牙按钮 点击 */
void Bluetooth::on_pushButton_openBluetooth_clicked()
{
localDevice->powerOn();
ui->pushButton_openBluetooth->setEnabled(false);
ui->pushButton_upDate->setEnabled(true);
/* 设置扫描蓝牙方式 GeneralUnlimitedInquiry:无限调查发现所有可见蓝牙设备 */
//discoveryAgent->setInquiryType(QBluetoothDeviceDiscoveryAgent::GeneralUnlimitedInquiry);
/* 开始扫描蓝牙设备 */
discoveryAgent->start();
}
/* 显示发现的蓝牙设备 */
void Bluetooth::displayBluetoothDevice(const QBluetoothDeviceInfo &info)
{
QString str = QString("%1 %2").arg(info.address().toString()).arg(info.name());
QList<QListWidgetItem *> items = ui->listWidget_displayBluetoothDevice->findItems(str, Qt::MatchExactly);
if (items.empty())
{
QListWidgetItem *item = new QListWidgetItem(str);
/* 蓝牙状态pairingStatus，Pairing枚举类型 0:Unpaired没配对 1:Paired配对但没授权 2:AuthorizedPaired配对且授权 */
QBluetoothLocalDevice::Pairing pairingStatus = localDevice->pairingStatus(info.address());
if (pairingStatus == QBluetoothLocalDevice::Paired || pairingStatus == QBluetoothLocalDevice::AuthorizedPaired )
item->setTextColor(QColor(Qt::green));
else
item->setTextColor(QColor(Qt::black));
ui->listWidget_displayBluetoothDevice->addItem(item);
}
}
/* 连接蓝牙 */
void Bluetooth::bluetoothConnect(QListWidgetItem *item)
{
QString text = item->text();
int index = text.indexOf(' ');
if(index == -1)
return;
QBluetoothAddress address(text.left(index));
QString name(text.mid(index + 1));
/* 输入配对密码 */
QMessageBox::information(this,tr("Info"),tr("The device is connecting..."));
socket->connectToService(address, QBluetoothUuid(serviceUuid) ,QIODevice::ReadWrite);
connect(socket, SIGNAL(connected()), this, SLOT(bluetoothConnectOk()));
connect(socket, SIGNAL(disconnected()), this, SLOT(bluetoothConnectNot()));
}
/* 连接成功 */
void Bluetooth::bluetoothConnectOk()
{
discoveryAgent->stop(); //停止搜索设备
QMessageBox::information(this, tr("成功"), tr("连接成功!"));
}
/* 连接失败 */
void Bluetooth::bluetoothConnectNot()
{
QMessageBox::information(this, tr("错误"), tr("连接失败!"));
}
/* 外部调用socket */
QBluetoothSocket *Bluetooth::getSocket()
{
return socket;
}
/* 刷新 重新扫描周围蓝牙设备 */
void Bluetooth::on_pushButton_upDate_clicked()
{
// discoveryAgent->setInquiryType(QBluetoothDeviceDiscoveryAgent::GeneralUnlimitedInquiry);
discoveryAgent->start();
ui->pushButton_upDate->setEnabled(false);
}
void Bluetooth::upDateFinish()
{
ui->pushButton_upDate->setEnabled(true);
}
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