Android EditText in ListView - keyboard

Question

I've got a problem with my EditText. I use the following adapter:

public class RowTextViewAdapter extends BaseAdapter {

...

  public View getView(int position, View convertView, ViewGroup parent) {

  ViewHolder holder = null;

    if (rowTitles.get(position).equals("edit")) {
        if(et == null){
            et = new EditText(activity);
            et.setText("Test");
        }
        return et;
    }
    else {
        convertView = new TextRow(activity);
        holder = new ViewHolder(((TextRow) convertView).getTextView(), ((TextRow) convertView).getImageView());
        convertView.setTag(holder);
        holder.getTextView().setText(StringManager.getInstance().getText(rowTitles.get(position), activity));
        holder.getImageView().setImageBitmap(assetController.getBitmap(additiveIcons.get(position) + ".png", null));
        return convertView;
    }
  }
}

and ListActivity:

public class AppSettingActivity extends ListActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        adapter = new RowTextViewAdapter(this);
        adapter.addRowView("account", "arrowDw");
        adapter.addRowView("password", "arrowDw");
        setListAdapter(adapter);
   }

...

   protected void onListItemClick(ListView listView, View view, int position, long id) {
    switch (position) {
        case 0: accIsEditable = adapter.setEditable(position); break;
        case 1: 
            if(accIsEditable) {
                                    //TODO do something..
                break;
            }
            pwIsEditable = adapter.setEditable(position);
            break;
          ...
   }
}

If i click on the first item I add a new list item on pos. 1 (pos: 0, 1, 2, ...). Now the EditText field is added to the list.

ListView:
----------------------------          -------------------------    
Account                   v           Account                ^     
----------------------------    ==>   -------------------------     
Passowrd                  v           [::::::::EditText:::::::]      
----------------------------          -------------------------
//more..                              Password               v
----------------------------          -------------------------
                                      //more..
                                      -------------------------

If I click now into the EditText field, it shows the virtual keyboard and loses focus of the EditText. I click again and it gains focus. But if I write something, the text is only showed in the EditText field, if i tap on it and not frequently while i'm writing...

Any idea to fix that update problem?