如何在android中使用两个web服务?

public class AppConfig {

    private static String TAG = SessionManager.class.getSimpleName();

    // Shared Preferences
    SharedPreferences pref;

    SharedPreferences.Editor editor;
    Context _context;

    // Shared pref mode
    int PRIVATE_MODE = 0;

    // Shared preferences file name
    private static final String PREF_NAME = "Login";

    AppConfig appConfig = new AppConfig(_context.getApplicationContext());

    public static String BASE_URL = appConfig.apiDecider();

    public static String login = BASE_URL + "Login";

    public AppConfig(Context context) {
        this._context = context;
        pref = _context.getSharedPreferences(PREF_NAME, PRIVATE_MODE);
        editor = pref.edit();
    }

    public String apiDecider(){

        String lc = pref.getString("locationSession", null);

        //String lc = locationPref.getString("locationSession", null);

        String url = "";

        if (lc.equals("U") && lc != null) {

            url = "";

        } else if (lc.equals("S") && lc != null) {

            url = "";
        }

        return url;
    }
}