Map/Location

Hi, I tried to put the following parameters in OH, but from android smartphones I do not see the map but only the black screen

Thanks for help

------------------- RULES-------------------
rule "Initialize Location"
when
System started
then
DemoLocation.postUpdate(new PointType(“45.3097228,9.50371599999994”))
end

-------------------SITEMAP-------------------
Frame label=“Map/Location” {
Mapview item=DemoLocation height=10
}

------------------- ITEMS-------------------
Location DemoLocation “Lodi Italy”