HttpTask menuTask = new HttpTask(this, getApp().getHttp());
menuTask.connect(new HttpTaskHandler(this) {
	@Override
	protected boolean onSuccess(Activity activity, String response) {
		// do stuff with response
		return false;
	}
});
menuTask.execute(getString(R.string.api_url));

public class HttpTask extends IgnitedAsyncTask<Activity, String, Void, String> {

	private static final String LOG_TAG = "HttpTask";

	private IgnitedHttp http;

	private static int runningTasks = 0;
	private static ProgressDialog loader;

	public HttpTask(Activity context, IgnitedHttp http) {
        this.connect(context);
        this.http = http;
	}

	private synchronized void startTask() {
		runningTasks++;
	}

	private synchronized void endTask() {
		runningTasks--;
	}

	private synchronized void showLoader(Activity context) {
		loader = ProgressDialog.show(context, context.getString(R.string.please_wait), context.getString(R.string.loading_data), true, false);
	}

	private synchronized void hideLoader() {
		loader.dismiss();
	}

	@Override
	public boolean onTaskStarted(Activity context) {
		if(runningTasks == 0) {
			showLoader(context);
    	}
		startTask();
		return true;
	}

    @Override
    public boolean onTaskSuccess(Activity context, String response) {
    	endTask();
    	if(runningTasks == 0) {
    		hideLoader();
    	}
    	disconnect();
    	return false;
    }

    @Override
    public String run(String... urls) throws ConnectException, IOException {
		Log.d(LOG_TAG, String.format("Loading: %s", urls[0]));
		IgnitedHttpResponse resp = http.get(urls[0], true).retries(3).expecting(200).send();

		return resp.getResponseBodyAsString();
    }

    @Override
    public boolean onTaskFailed(Activity context, Exception error) {
    	endTask();

    	if(runningTasks == 0) {
    		hideLoader();
    	}

    	// should show error here

        super.onTaskFailed(context, error); // prints a stack trace
        return true;
    }

}


public abstract class HttpTaskHandler implements IgnitedAsyncTaskHandler<Activity, Void, String> {

	private Activity activity;

	public HttpTaskHandler(Activity activity) {
		this.activity = activity;
	}

	protected abstract boolean onSuccess(Activity activity, String response);

	@Override
	public Activity getContext() {
		return activity;
	}

	@Override
	public boolean onTaskCompleted(Activity arg0, String arg1) {
		return false;
	}

	@Override
	public boolean onTaskFailed(Activity arg0, Exception arg1) {
		return false;
	}

	@Override
	public boolean onTaskProgress(Activity arg0, Void... arg1) {
		return false;
	}

	@Override
	public boolean onTaskStarted(Activity activity) {
		return false;
	}

	@Override
	public boolean onTaskSuccess(Activity activity, String response) {
		return onSuccess(activity, response);
	}

	@Override
	public void setContext(Activity activity) {
		this.activity = activity;
	}

}