QT5 检测 usb设备插拔

上来直接贴代码

完整工程文件下载

QT5 USB 插拔检测完整工程

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <windows.h>
#include <QMainWindow>
#include <dbt.h>
#include<devguid.h>
#include<SetupAPI.h>
#include<InitGuid.h>
#include <QString>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

private:
Ui::MainWindow *ui;
char FirstDriveFromMask (ULONG unitmask);

protected:
bool nativeEvent(const QByteArray & eventType, void * message, long*result);

private slots:
void on_pushButton_clicked();
};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <locale>

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

#if 1
static const GUID GUID_DEVINTERFACE_LIST[] =
{
// GUID_DEVINTERFACE_USB_DEVICE
{ 0xA5DCBF10, 0x6530, 0x11D2, { 0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED } },
// GUID_DEVINTERFACE_DISK
{ 0x53f56307, 0xb6bf, 0x11d0, { 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b } },
// GUID_DEVINTERFACE_HID,
{ 0x4D1E55B2, 0xF16F, 0x11CF, { 0x88, 0xCB, 0x00, 0x11, 0x11, 0x00, 0x00, 0x30 } },
// GUID_NDIS_LAN_CLASS
{ 0xad498944, 0x762f, 0x11d0, { 0x8d, 0xcb, 0x00, 0xc0, 0x4f, 0xc3, 0x35, 0x8c } }
//// GUID_DEVINTERFACE_COMPORT
//{ 0x86e0d1e0, 0x8089, 0x11d0, { 0x9c, 0xe4, 0x08, 0x00, 0x3e, 0x30, 0x1f, 0x73 } },
//// GUID_DEVINTERFACE_SERENUM_BUS_ENUMERATOR
//{ 0x4D36E978, 0xE325, 0x11CE, { 0xBF, 0xC1, 0x08, 0x00, 0x2B, 0xE1, 0x03, 0x18 } },
//// GUID_DEVINTERFACE_PARALLEL
//{ 0x97F76EF0, 0xF883, 0x11D0, { 0xAF, 0x1F, 0x00, 0x00, 0xF8, 0x00, 0x84, 0x5C } },
//// GUID_DEVINTERFACE_PARCLASS
//{ 0x811FC6A5, 0xF728, 0x11D0, { 0xA5, 0x37, 0x00, 0x00, 0xF8, 0x75, 0x3E, 0xD1 } }
};

//注册插拔事件
HDEVNOTIFY hDevNotify;
DEV_BROADCAST_DEVICEINTERFACE NotifacationFiler;
ZeroMemory(&NotifacationFiler,sizeof(DEV_BROADCAST_DEVICEINTERFACE));
NotifacationFiler.dbcc_size = sizeof(DEV_BROADCAST_DEVICEINTERFACE);
NotifacationFiler.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;

for(int i=0;i<sizeof(GUID_DEVINTERFACE_LIST)/sizeof(GUID);i++)
{
NotifacationFiler.dbcc_classguid = GUID_DEVINTERFACE_LIST[i];//GetCurrentUSBGUID();//m_usb->GetDriverGUID();

hDevNotify = RegisterDeviceNotification((HANDLE)this->winId(),&NotifacationFiler,DEVICE_NOTIFY_WINDOW_HANDLE);
if(!hDevNotify)
{
int Err = GetLastError();
qDebug() << "注册失败" <<endl;
}
//else
}
#endif

}

MainWindow::~MainWindow()
{
delete ui;
}

char MainWindow::FirstDriveFromMask(ULONG unitmask)
{
char i;
for (i = 0; i < 26; ++i)
{
if (unitmask & 0x1)
break;
unitmask = unitmask >> 1;
}
return (i + 'A');
}

bool MainWindow::nativeEvent(const QByteArray &eventType, void *message, long *result)
{
MSG* msg = reinterpret_cast<MSG*>(message);
int msgType = msg->message;
if(msgType==WM_DEVICECHANGE)
{
//qDebug() << "Event DEVICECHANGE Happend" << endl;
PDEV_BROADCAST_HDR lpdb = (PDEV_BROADCAST_HDR)msg->lParam;
switch (msg->wParam) {
case DBT_DEVICEARRIVAL:
if(lpdb->dbch_devicetype == DBT_DEVTYP_VOLUME)
{
PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb;
if(lpdbv->dbcv_flags ==0)
{
//插入u盘
QString USBDisk = QString(this->FirstDriveFromMask(lpdbv ->dbcv_unitmask));
qDebug() << "USB_Arrived and The USBDisk is: "<<USBDisk ;
ui->textBrowser->append("USB_Arrived and The USBDisk is " + USBDisk);

}
}
if(lpdb->dbch_devicetype = DBT_DEVTYP_DEVICEINTERFACE)
{
PDEV_BROADCAST_DEVICEINTERFACE pDevInf  = (PDEV_BROADCAST_DEVICEINTERFACE)lpdb;

QString strname = QString::fromWCharArray(pDevInf->dbcc_name,pDevInf->dbcc_size);

// ui->textBrowser->append("插入设备 ：" + strname);
}
break;
case DBT_DEVICEREMOVECOMPLETE:
qDebug() << "设备移除" <<endl;
if(lpdb->dbch_devicetype == DBT_DEVTYP_VOLUME)
{
PDEV_BROADCAST_VOLUME lpdbv = (PDEV_BROADCAST_VOLUME)lpdb;
if(lpdbv->dbcv_flags == 0)
{
//qDebug() << "USB_Removed";
ui->textBrowser->append("USB_Remove");

}
}
if(lpdb->dbch_devicetype = DBT_DEVTYP_DEVICEINTERFACE)
{
PDEV_BROADCAST_DEVICEINTERFACE pDevInf  = (PDEV_BROADCAST_DEVICEINTERFACE)lpdb;
qDebug()<< "移除设备(name)：" << pDevInf->dbcc_name;
//qDebug()<< "移除设备(guid)：" << pDevInf->dbcc_classguid;
qDebug()<< "移除设备(size)：" << pDevInf->dbcc_size;

QString strname = QString::fromWCharArray(pDevInf->dbcc_name,pDevInf->dbcc_size);

ui->textBrowser->append("移除设备 " + strname);
}
break;
}
}
return false;

}

void MainWindow::on_pushButton_clicked()
{
ui->textBrowser->clear();
}

最后留下一些说明

qt 检测usb插拔基本上是和vc,mfc的做法是一致的，上面的代码段我也是直接从VC工程中拷贝出来的

在QT里的做法

1.头文件

#include <windows.h>
#include <dbt.h>
#include<devguid.h>
#include<SetupAPI.h>
#include<InitGuid.h>

2.重写QMainWindow的方法

bool nativeEvent(const QByteArray & eventType, void * message, long*result);

这里qt4和qt5可能不一样，我这是QT5的写法

在里面处理usb插拔事件

到这一步可以识别U盘，和部分USB设备了，但是还是不能识别usb-key

3 RegisterDeviceNotification

注释掉了几个，要是你的设备还是不能识别，把注释掉的几个打开看看