Android : GPS Location on Button Press

I am currently writing an app which will access the current location on the press of a button, and print it out. What I have right now is a method which gets the last known location. I have seen in many places that one is to implement a class that gets the location. My current code returns it as a string, but it only gets the location that was last updated by the phone. How can I change this so that when I press the button and call a method that uses this String, it will get the currentLocation rather than the lastLocation? Thank you so much! Also, This is my first ever android app, and I only have intermediate knowledge of Java and class implementation.

public String getLocation(){
    String userLocation;

    try {
        LocationManager locMgr = (LocationManager) this.getSystemService(LOCATION_SERVICE);
        Location recentLoc = locMgr.getLastKnownLocation(LocationManager.GPS_PROVIDER);
        String userLocator = recentLoc.toString();
        userLocation = compressString(userLocator);
        //userLocation = recentLoc.toString();

    }
            catch(Exception e) {
        userLocation = "Location failed";
    }

    return userLocation;
}