Even it is not really what you are looking for, you can also find the real dimensions of the pixels with the code below.
Private jo As JavaObject
Private xdpi, ydpi As Double
jo = Root
jo = jo.RunMethodJO("getResources", Null)
jo = jo.RunMethodJO("getDisplayMetrics", Null)
xdpi = jo.GetField("xdpi")
ydpi = jo.GetField("ydpi")
xdpi and ydpi are the dots per inch values, the number of pixels per inch, for the device.
You could use these values if you want to display anything in real dimensions., like a ruler.
Otherwise you need to understand what are dip (device independent pixels) Anchors and AutoScale in the Designer.