I've looked at a lot of tutorials for making a ListView have the alphabetical letters on the side (like the Contacts list), but they all seem to using a ListActivity class and/or data from a database while I'm just using a ListView (no special Activity) and an ArrayList of data. Does anyone know how I can implement that alphabetical-scroll feature in the Contacts list for my own ListView?

Edited Again

I followed this tutorial, which I thought would finally make it work, but I'm still getting a forced close.

class AlphabeticalAdapter extends ArrayAdapter<String> implements SectionIndexer
{
    private HashMap<String, Integer> alphaIndexer;
    private String[] sections;

    public AlphabeticalAdapter(Context c, int resource, List<String> data)
    {
        super(c, resource, data);
        for (int i = 0; i < data.size(); i++)
        {
            String s = data.get(i).substring(0, 1).toUpperCase();
            alphaIndexer.put(s, i);
        }

        Set<String> sectionLetters = alphaIndexer.keySet();
        ArrayList<String> sectionList = new ArrayList<String>(sectionLetters);
        Collections.sort(sectionList);
        sections = new String[sectionList.size()];
        sectionList.toArray(sections);

    }

    public int getPositionForSection(int section)
    {   
        return alphaIndexer.get(sections[section]);
    }

    public int getSectionForPosition(int position)
    {
        return 1;
    }

    public Object[] getSections()
    {
        return sections;
    }
}

In the LogCat, it says java.lang.RuntimeException: Unable to resume activity {(package of another app I made) android.app.SuperNotCalledExcpetion. I thought that was really weird because I don't ref

android listview
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