Best way to get collect pounds or kilos in android from user? : <p>I am going to write a BMI app and I would like to allow the user to enter weight and height in either U.S. units or metric. I am not sure what is the best way to go about this because I would also like to be able for the user to save their preference. Should I use a switch widget? Thanks in advance. Also not sure if I am asking in the right place. </p>
