例如：

private MapView mapView;
private MyLocationOverlay Location;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.frame_layout);

    mapView = (MapView) this.findViewById(R.id.mapView);
    Location = new MyLocationOverlay(this,mapView);
    Location.enableMyLocation();
    Location.enableCompass();
    mapView.getOverlays().add(Location);
}

@Override
public void onDestroy() {
    Location.disableMyLocation();
    Location.disableCompass();
}