Android : How to Show Current Location?

Hey Guys i created one Android google map api v2, and now i want to add user current location in map,so can anyone help me for it?

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here is my code

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public class MainActivity extends FragmentActivity {

@Override

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    GoogleMap googleMap;
    googleMap = ((SupportMapFragment)(getSupportFragmentManager().findFragmentById(R.id.map))).getMap();
    LatLng latLng = new LatLng(-33.796923, 150.922433);

    googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
    googleMap.addMarker(new MarkerOptions()
            .position(latLng)
            .title("My Spot")
            .snippet("This is my spot!")
            .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));


    //  googleMap.getUiSettings().setCompassEnabled(true);
  //  googleMap.getUiSettings().setZoomControlsEnabled(true);
   // googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 10));

} }