small job for qgis developer: display google road map on the qgscanvas in EPSG:3857 -- 2

Here is my code to display google road map on the qgscanvas: QgsDataSourceUri ds; [login to view URL]("type", "xyz"); [login to view URL]("url", QString("https://mt1.google.com/vt/lyrs=m&x={x}&y={y}&z={z}")); QgsRasterLayer* layer = new QgsRasterLayer([login to view URL](), "my map", "wms"); QList<QgsMapLayer*> layers = mCanvas->layers(); [login to view URL](0, layer); mCanvas->setLayers(layers); mCanvas->setExtent(layer->extent()); but the result display incorrect coordinate, investigate information about provider, I can not found information about CRS, map unit,..... When use QGIS desktop, I can add xyz tile layer using google map to the canvas and right click on layer, choose properties to show information about provider, it allready show crs, unit, bounding box,...