title: notifyDatasetChanged() not working on the adapter
body: <p>i've created a custom list with four textviews...the data in this list is saved through a dialog which has a ok button. when i add the data, it gets saved in the list(works fine till now). when i add the next element, all the rows gets same value as the last one...the notifyDatasetChanged() is also not working...am i wrong somewhere?...this is my code...  </p>
  
  <pre><code>ok.setOnClickListener(new View.OnClickListener() {
                  @Override
                  public void onClick(View view) {
                     String val =  editquantity.getText().toString();
                      valq1 = Integer.parseInt(val);
                      ListView l;
                      l = (ListView) v.findViewById(R.id.order_listview);
                      myAdapter adapter = new myAdapter(getActivity(), row);
                      l.setAdapter(adapter);
                      row.add("");
                      adapter.notifyDataSetChanged();
                      builder.dismiss();
  
                  }
              });
  
              builder.setView(dialog);
              builder.show();
  </code></pre>