public void next(int id) {
   if (!DbAdapter.is_open) {
     dbadapter.open();
   }
   lista.clear();
   lista.addAll(dbadapter.searchRowCatName(id));
   adapter.notifyDataSetChanged();
   dbadapter.close();
 }
 public void onCreate(Bundle icicle) {
   super.onCreate(icicle);
   dbadapter = new DbAdapter(getApplicationContext());
   if (!DbAdapter.is_open) {
     dbadapter.open();
   }
   getActionBar().setDisplayHomeAsUpEnabled(true);
   int element = 0;
   lista = dbadapter.searchRowCatName(element);
   dbadapter.close();
   adapter = new Cele_Cats_Adapter(this, lista);
   adapter.notifyDataSetChanged();
   getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
   setListAdapter(adapter);
 }