custom google map on android

Question

I have a kml file which contains several 100 sidewalks as LineStrings. this would be constant for the entire android app. can i create a custom google map with such a kml file as an overlay and retrieve the same as a whole from the server and display on the phone. please let me know if its possible and if yes..how?

for now i have stored the kml file on the phone itself and try to overlay it on the fly. since the number of sidewalks is large, the phone crashes...