As Cableguy already suggested, you must use a Canvas.
Canvas has the DrawPoint(x, y, Color) method.
The code below draws a red square onto the Activity.
Up to you to extract the x, y and color calues from your data.
Sub Globals
Private cvsActivity As Canvas
End Sub
Sub Activity_Create(FirstTime As Boolean)
cvsActivity.Initialize(Activity)
Draw
End Sub
Private Sub Draw
Private x, y As Int
For x = 100 To 500
For y = 100 To 500
cvsActivity.DrawPoint(x, y, Colors.Red)
Next
Next
End Sub