import the plugin
Add a single instance of the item to the root item of your main.qml
to call it from anywhere in your app.

main.qml

import QtQuick 2.10
import QtQuick.Window 2.10
import QtQuick.Controls 2.3
import Indev.net.br.qgoogleanalytics 1.0 // import plugin

Window {
    id: main
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    // instance plugin
    QGoogleAnalytics {
        id: qa
        // enable sending data, Default false
        enabled: true
        // Property tracking ID from Google Analytics Dashboard
        tid: "UA-128496862-1"
        Component.onCompleted: qa.logScreen("Home")
    }

    Button {
        id: button
        text: qsTr("Buton")
        anchors.verticalCenter: parent.verticalCenter
        anchors.horizontalCenter: parent.horizontalCenter
        onClicked: qa.logEvent("User Action", "Clik Button")
    }

    Component.onCompleted: qa.logScreen("Home")
}

which defines the name of the screen.
QGoogleAnalytics :: logException ("screen name")

To define an event category and another to define the name
of the event.
QGoogleAnalytics :: logEvent ("User Action," "Clicked Button")

being one of them obligatory and another not, having its fixed value by default.
The first argument defines the description of the exception, and another defines
whether the hit was fatal or not, taking as false by default.
QGoogleAnalytics :: logException ("Not found database", true)

QGoogleAnalytics :: logException ("Database not found")

QGoogleAnalytics :: logException ("Division by 0", true)