如何在Android应用中使用HTTP cookie？

CookieManager cookieManager;
CookieStore cookieStore;

cookieManager = new CookieManager();
CookieHandler.setDefault(cookieManager);

public byte[] openURI(String uri) {

    try {
        URI uriObj = new URI(uri);
        DefaultHttpClient client = new DefaultHttpClient();

        // Use the cookieStor with the request
        if (cookieStore == null) {
            cookieStore = client.getCookieStore();
        } else {
            client.setCookieStore(cookieStore);
        }

        HttpGet getRequest = new HttpGet(uriObj);
        HttpResponse response = client.execute(getRequest);

        // Read the response data
                    InputStream instream = response.getEntity().getContent();
        int contentLength = (int) response.getEntity().getContentLength();
        byte[] data = new byte[contentLength];
        instream.read(data);
        response.getEntity().consumeContent();
        return data ;

    } catch (URISyntaxException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return null;        
}