Android :: Obtain Current GPS Location Via Android

I am about to build an app in Android that will act as a clock in card for employees on the road.

At teh start of a job the user will click a button that will record the GPS location and current time (thus verifying that he is where he should be at a given time) and again at the end of teh job he records the time and GPS location.

SO I reckon this will be easy enough, except that I cant find a way of pulling current location data, the nearest I can find is "onLocationChanged" which implies that I cannot get a stationary GPS read. I know it has to be possible to do this but cannot find a working example of how it would be achieved.