Map markers too small on Android

Hi! I have this problem, I add some 32x37px markers on a map and they look Ok on iPhone but they look very small on Android, I like to know if there is a way to change the icon size programmatically. I know how to detect platform and I know I can use another bigger icons for Android but I want to use the same markers and change their size programmatically. Is there a way to do that?
Thanks in advance.
Regards.