Populating an arraylist from an AsyncTask

Question

I have the following ListPreference in a PreferenceActivity that I wish to populate with phone numbers that I retrieve from a web service. How do I go about succeeding in doing this ?

    <PreferenceCategory
        android:title="@string/category_shownumber">

            <ListPreference
                    android:title="@string/shownumber_header"
                    android:summary="@string/shownumber_summary"
                    android:key="shownumber_list"
                    android:defaultValue="@string/shownumber_default"
                    android:entries="@array/listArray"
                    android:entryValues="@array/listValues" />

</PreferenceCategory>

I wish for my android:entries to be from the string array returned by doInBackground in this class :

    private class PullNumbersTask extends AsyncTask<Void, Void, String[]>
{
    private Context ctx; 

    public PullNumbersTask(Context context)
    {
        super();
        this.ctx=context;
    }
    private ProgressDialog Dialog = new ProgressDialog(getParent());

    protected void onPreExecute() 
    {
        Dialog.setMessage("Fetching numbers..");
        Dialog.show();
    }

    @Override
    protected String[] doInBackground(Void... arg0) {
        return (userControl.GetNumbers());
    }


     protected void onPostExecute(String[] result) 
     {
              // Do stuff with my array
     }

Any suggestions?

Answer 1

How about simply calling this in your onPostExecute

listPref.setEntries(result);

(obviously you'd need a reference to the ListPreference object)

edit

To actually get a hold on the ListPreference object, you would do

ListPreference listPref = (ListPreference) findPreference("shownumber_list");

the call to addPreferencesFromResource(R.xml.preferences); must have been done before that (most likely in the onCreate())