Shift the coordinates under Android when I use QML + c++.

component_aideQML = new QQmlComponent (engine_configuration);
component_aideQML->loadUrl (QUrl ("qrc: ///qml/help. qml");

helpQML =qobject_cast<QQuickWindow*> component_aideQML->create ();

helpQML->setWidth (450);

helpQML->setHeight (300);
helpQML->setPosition (0.0,0.0.0);

helpQML->setFlags (Qt:: WindowStaysOnTopHint | Qt:: FramelessWindowHint);

helpQML->showNormal ();

import QtQuick 2.9
import QtQuick.Window 2.3
import QtQuick.Controls 2.2
import QtQuick.Controls.Material 2.2
import MyLib 1.0

Window {
   id: main2

   property double trans: anchoraide.Trans 
   property double coef: anchoraide.Coef
   property string texte: anchoraide.texte

   Material.theme: Material.Dark
   Material.accent: Material.Red

   modality: Qt.NonModal

   //visibility: Window.Windowed

   width: 450
   height: 300

   color: "#333333"

   opacity: trans

   Image {
        id: image_fermer
        width: 34
        height: 34
        anchors.top: parent.top
        anchors.topMargin: 0
        anchors.right: parent.right
        anchors.rightMargin: 0
        source: "../res/icons/fermer.png"

        MouseArea{
              anchors.fill: image_fermer

              onClicked:
              {
                     anchoraide.checkPost_command("exit")
              }
        }
     } 
 }

Component.onCompleted:
{
    visible = true
}
}