WebAppInterface(Context c, Response response) {
        activity = (Activity) c;
        delegate = response;
        context = c;
    }

    /** Show a toast from the web page */
    @JavascriptInterface
    public void getResponse(final String operation, final String response, final String type) {
        final Handler mainHandler = new Handler(context.getMainLooper());
        mainHandler.post(new Runnable() {
            @Override
            public void run() {
                delegate.didGetResponse(operation, response, type);
                Log.d("Success: ", "Im still here"); <-- why am I not back in main thread?
            }
        });
    }

    public interface Response {
        public void didGetResponse(String operation, String response, String type);
    }