Remote Content doesn't refresh

Question

I got a bit of a Problem with my App, i use a .txt File for getting the right URL's to Display my Pictures that the App should show. Everything works fine. But if i change the Content of the Remote .txt File the App keeps loading the same Pictures again. Here is the code for getting the Pics from remote.

private ArrayList<String> getPictures(){
    fileList.clear();
    try {
        URL url = new URL("http://server.com/test.txt");
        BufferedReader in = new BufferedReader(new InputStreamReader(
                url.openStream()));
        String str;
        while ((str = in.readLine()) != null) {
            fileList.add(str);
        }
        in.close();
    } catch (MalformedURLException te) {
        finish();
    } catch (IOException tt) {
        finish();
    }
    return fileList;
}

So i don't have a clue why it isn't getting the new content for i clear the ArrayList each time the method is called!

I hope someone has a Solution for this Problem, it's pretty anoying.

/edit: forgot to post the Method containing the Adapter, so here it is:

private String getAnImageUrl() {
    getPictures();
    ArrayAdapter<String> arrAdapt = new ArrayAdapter<String>(this, R.layout.main, fileList);
    arrAdapt.setNotifyOnChange(true);
    i++;
    if (i >= arrAdapt.getCount()) {
        i = 0;
    }
    return test = arrAdapt.getItem(i).toString();
}

Answer 1

Yeah, I experienced this with my own app downloading some JSON. The easiest way to fix it is to add a random parameter to your URL request like so:

String urlString = "http://server.com/test.txt?" + System.currentTimeMillis();
URL url = new URL(urlString);

Which will add the current system time to your url as a parameter, which will bypass any cached version of the page