qt-everywhere-src-5.14.1/qtconnectivity/examples/bluetooth/chat/qmlchat.cpp

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#include <QtGui/QGuiApplication>
#include <QtQuick/QQuickView>
#include <QtQml/QQmlEngine>
#include <QtQml/QQmlContext>
#include <QDebug>
#include <QBluetoothLocalDevice>
#include <QtCore/QLoggingCategory>
#ifdef Q_OS_ANDROID
#include <QtAndroidExtras/QtAndroid>
#endif

int main(int argc, char *argv[])
{
    //QLoggingCategory::setFilterRules(QStringLiteral("qt.bluetooth* = true"));
    QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QGuiApplication application(argc, argv);

    QList<QBluetoothHostInfo> infos = QBluetoothLocalDevice::allDevices();
    if (infos.isEmpty())
        qWarning() << "Missing Bluetooth local device. "
                      "Example will not work properly.";

    const QString mainQmlApp = QLatin1String("qrc:/chat.qml");
    QQuickView view;

#ifdef Q_OS_ANDROID
    //workaround for Android's SDP discovery bug (see QTBUG-61392)
    QString uuid;
    if (QtAndroid::androidSdkVersion() >= 23)
        uuid = QStringLiteral("c8e96402-0102-cf9c-274b-701a950fe1e8");
    else
        uuid = QStringLiteral("e8e10f95-1a70-4b27-9ccf-02010264e9c8");
#else
    const QString uuid(QStringLiteral("e8e10f95-1a70-4b27-9ccf-02010264e9c8"));
#endif

    view.engine()->rootContext()->setContextProperty(QStringLiteral("targetUuid"), uuid);
    view.setSource(QUrl(mainQmlApp));
    view.setResizeMode(QQuickView::SizeRootObjectToView);
    // Qt.quit() called in embedded .qml by default only emits
    // quit() signal, so do this (optionally use Qt.exit()).
    QObject::connect(view.engine(), SIGNAL(quit()), qApp, SLOT(quit()));
    view.setGeometry(QRect(100, 100, 360, 480));
    view.show();
    return application.exec();
}