Android AlertDialog does not show switches or message

Question

In my application, I call the long-click context menu in ListActivity. One of the Priority options is an AlertDialog with three choices of radio buttons. The problem is that it displays an empty dialog box without my 3 options or the message I installed. Here is my code ..

protected Dialog onCreateDialog(int id) {
    AlertDialog dialog;
    switch(id) {
    case DIALOG_SAB_PRIORITY_ID:
        final CharSequence[] items = {"High", "Normal", "Low"};

        AlertDialog.Builder builder = new AlertDialog.Builder(SabMgmt.this);
        builder.setMessage("Select new priority")
               .setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int item) {
                Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
            }
        });

        dialog = builder.create();            
        break;
    default:
        dialog = null;
    }
    return dialog;
}

If instead of the .setSingleChoiceItems parameter, the positive and negative buttons are replaced instead, it will display the buttons and message as expected. What am I doing wrong when setting up the switch list? Here is my calling code as well.

public boolean onContextItemSelected(MenuItem item) {
    AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
    switch (item.getItemId()) {
    case R.id.sabdelete:
        // Correct position (-1) for 1 header
        final SabQueueItem qItem = (SabQueueItem) itla.getItem(info.position-1);
        SabNZBdUtils.deleteItem(qItem.getNzo_id());
        getQueue();
        ListView lv = getListView();
        View v = lv.findViewById(R.id.sablistheader);
        setHeader(v);
        itla.notifyDataSetChanged();
        return true;
    case R.id.sabpriority:
        showDialog(DIALOG_SAB_PRIORITY_ID);
        return true;
    default:
        return super.onContextItemSelected(item);
    }
}

Answer 1

! builder.setMessage singleChoiceItem builder.setTitle. , , . , . , .

protected Dialog onCreateDialog(int id) {
    AlertDialog dialog;
    switch(id) {
    case DIALOG_SAB_PRIORITY_ID:
        final CharSequence[] items = {"High", "Normal", "Low"};

        AlertDialog.Builder builder = new AlertDialog.Builder(SabMgmt.this);
        builder.setTitle("Select new priority")
               .setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int item) {
                Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
            }
        });

        dialog = builder.create();  
        break;
    default:
        dialog = null;
    }
    return dialog;