Android: onPrepareDialogBuilder, onClick & setItemChecked

I've spent over a week trying to figure out a way to do a Limited Multi Selection Preference list. Nothing I've tried works. I'm ready to give up on Android if something seemingly simple is so hard. I've been programming a long time and don't remember being beaten up this badly by something like this. I have to assume I am not understanding something basic. I hope someone can point me in the right direction.

Here is the simplest code I can think off that should work. It does not clear the checkbox even when setting it to false, I've tried true as well. Why do开发者_运维技巧esn't that work? If that will not work, what will?

Any help would be most appreciated.

    @Override
    protected void onPrepareDialogBuilder(Builder builder) 
    {
     CharSequence[] entries = getEntries();
     CharSequence[] entryValues = getEntryValues();

        if (entries == null || entryValues == null || entries.length != entryValues.length ) {
            throw new IllegalStateException(
                    "ListPreference requires an entries array and an entryValues array which are both the same length");
        }

        // Added by WJT since we are loading the entries values after instantiation 
        // we need the clicked indexes to be setup now, they would not have been
        // set up in the constructor
        if ((mClickedDialogEntryIndices == null) || (mClickedDialogEntryIndices.length == 0))
         mClickedDialogEntryIndices = new boolean[getEntries().length];

        restoreCheckedEntries();
        builder.setMultiChoiceItems(entries, mClickedDialogEntryIndices, 
                new DialogInterface.OnMultiChoiceClickListener() 
        {
   public void onClick(DialogInterface dialog, int which, boolean val) 
   {
    mDlg = (AlertDialog)getDialog();
                mListView = (ListView)mDlg.getListView();
    if (val)
             {
              if (mSelectedCount < mLimit)
                 {
               mClickedDialogEntryIndices[which] = val;
                  mSelectedCount++;

                 }
              else
                 {
                  mListView.setItemChecked(which, false);
               Toast.makeText(getContext(),
              R.string.newsLimitExceededMessage,
              Toast.LENGTH_LONG).show();

                 }  // (mSelectedCount < mLimit)

             }
             else
             {
              mClickedDialogEntryIndices[which] = val;
              mSelectedCount--;

             }  // (val)

   }  // void onClick(DialogInterface dialog, int which, boolean val)


        });  //  DialogInterface.OnMultiChoiceClickListener() 

    }  // void onPrepareDialogBuilder(Builder builder) 

Thanks,

\ ^ / i l l

Here's how I would approach the problem:

Step #1: Get this working in a standalone throwaway test activity. Forget preferences. Forget dialogs. Just focus on the functionality of having a CHOICE_MODE_MULTIPLE ListView where, after a certain number of items are checked, the unchecked items become disabled.

Step #2: Get the functionality from Step #1 working in the form of a custom widget. By this, I mean you would implement a subclass of ListView (I guess...might be some container if there's more to it than a ListView) that bakes in all of what you need from Step #1.

Step #3: Create a custom DialogPreference subclass that uses the custom widget from Step #2.

For example, here is a sample project where I have a custom ColorMixer widget, rolled into a ColorPreference.