title: Android: ListView not refreshing on notifyDataSetChanged();
body: <p>I've got a custom BaseAdapter and an add button in the main activity. The button opens a dialog with a textbox and you can add new elements to the list that way. The problem is that the list is not refreshing. In the onActivityResult() function I print the number of elements in the list and each time I hit OK in the dialog box the number increases, so I know it's just the refreshing that doesn't work. My BaseAdapter and my activity:</p>
  
  <pre><code>class ListaOrase extends BaseAdapter{
      private Activity context;
      ArrayList&lt;String&gt; orase;
  
      public ListaOrase(Activity context){
          this.context=context;
          orase=new ArrayList&lt;String&gt;();
      }
      public void add(String string){
          orase.add(string);
          this.notifyDataSetChanged();
      }
  
      public View getView (int position, View convertView, ViewGroup list)  {
          View element;
          if (convertView == null)
          {
           LayoutInflater inflater = context.getLayoutInflater();
           element = inflater.inflate(R.layout.lista, null);
          }
          else element = convertView;
          TextView elementLista=(TextView)element.findViewById(R.id.elementLista);    
          elementLista.setText(orase.get(position));
          return element;
      }
  
  }
  
  public class WeatherAppActivity extends ListActivity {
  
      Button buton;
      ListaOrase lista;
  
      @Override
      public void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
          lista=new ListaOrase(this);
          buton=(Button)findViewById(R.id.buton);
  
  
          lista.add("Bucuresti");
          lista.add("Sibiu");
          setListAdapter(lista);
  
      }
  
      public void add(View view){
          Intent intent=new Intent();
          intent.setClass(this, Adauga.class);
          startActivityForResult(intent, 0);
      }
  
      public void onActivityResult (int requestCode, int responseCode, Intent data){
          System.out.println("Apelata");
          if(responseCode==1){
              lista.add(data.getStringExtra("oras")); // e chiar getText()
              System.out.println(lista.getCount());
              lista.notifyDataSetChanged();
          }
      }
  }
  </code></pre>
  
  <p>As you can see, I'm trying to refresh (notifyDataSetChanged();) both when adding a new element (in the BaseAdapter extending class) and in method onActivityResult, after the dialog passes the new element to the main Activity. I repeat, the element IS added to the list because the count increases, it just doesn't refresh.</p>
  
  <p>Thanks for your answers! </p>