ArrayList<String>을 String[] 형으로 변환

AlertDialog 에 ArrayList<String> 값을 뿌려주기 위해..

String[] items = resultItemData.toArray(new String[resultItemData.size()]);

AlertDialog.Builder builder = new AlertDialog.Builder(SiteInfoMap.this);
    builder.setTitle("선택");
    builder.setItems(items, new DialogInterface.OnClickListener() {
     public void onClick(DialogInterface dialog, int item) {
      Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();

     }

});
    
AlertDialog alert = builder.create();
alert.show();