Code example for UsernamePasswordCredentials

	 *            - an AuthScope object 
	public void setBasicAuth(String user, String pass, AuthScope scope)
		UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(
				user, pass);
	 * Cancels any pending (or potentially active) requests associated with the 
	 * passed Context. 
	 * <p> 
	 * <b>Note:</b> This will only affect requests which were created with a 
	 * non-null android Context. This method is intended to be used in the 
	 * onDestroy method of your android activities to destroy all requests which 
	 * are no longer required.