Using Protocol Android to retrieve Stripe credit card token with an async request

SomeActivity.java

private void getStripeToken(String stripeApi, String cardNumber, String expMonth, String expYear, String cvc) {
  	
	// Sets basic auth header with Stripe API key and adds post params for number, exp month, exp year, and cvc
	ParamsRequestData requestData = new ParamsRequestData();
	requestData.addBearerAuthHeader(stripeApi);
	requestData.addParam("card[number]", cardNumber);
	requestData.addParam("card[exp_month]", expMonth);
	requestData.addParam("card[exp_year]", expYear);
	requestData.addParam("card[cvc]", cvc);
	
	// Performs async 
	final ProgressDialog prog = ProgressDialog.show(getActivity(), "Getting Stripe token", "", true);
	ProtocolTask task = new ProtocolTask(HttpMethod.HTTP_POST, "https://api.stripe.com/v1/tokens", requestData, new JSONResponseHandler() {

		@Override
		public void handleResponse(JSONObject jsonObject, JSONArray jsonArray) {
			prog.dismiss();
			
			// Handle successful response
			if (this.getStatus() == 200) {
				
				// Gets the token id out of the JSON response
				try {
					String token = jsonObject.getString("id");
					Toast.makeText(getActivity(), "Token - " + token, Toast.LENGTH_SHORT).show();
				} catch (JSONException e) {}
				
			}
			// Handle error response
			else {
				
				// Gets the error message out of the JSON response
				try {
					String errorMessage = jsonObject.getJSONObject("error").getString("message");
					Toast.makeText(getActivity(), "Error - " + errorMessage, Toast.LENGTH_SHORT).show();
				} catch (JSONException e) {}
				
			}
			
		}
		
	});
	task.execute();
	
}