La méthode getView sous Android

Bonjour
Voici un exemple pour la méthode getView d'Android:

private class MyTag {
TextView txtData;
TextView txtExtra;
}
public View getView(int position, View convertView, ViewGroup parent)
{
MyTag holder;
if (convertView == null){
convertView = inflater.inflate(android.R.layout.simple_list_item_2, null);
holder = new MyTag();

holder.txtData = (TextView)convertView.findViewById(android.R.id.txt1);
holder.txtExtra = (TextView)convertView.findViewById(android.R.id.txt2);
// Nous spécifions nos données au contrôle personnalisé
convertView.setTag(holder);
} else {
holder = (MyTag)convertView.getTag();
}
holder.txtData.setText(data[position]);
holder.txtExtra.setText(""+System.currentTimeMillis());
return convertView;
}

abstract View getView(int position, View convertView, ViewGroup parent)
Get a View that displays the data at the specified position in the data set.

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

Added in API level 1
Get a View that displays the data at the specified position in the data set. You can either create a View manually or inflate it from an XML layout file. When the View is inflated, the parent View (GridView, ListView...) will apply default layout parameters unless you use inflate(int, android.view.ViewGroup, boolean) to specify a root view and to prevent attachment to the root.

Parameters
position The position of the item within the adapter's data set of the item whose view we want.
convertView The old view to reuse, if possible. Note: You should check that this view is non-null and of an appropriate type before using. If it is not possible to convert this view to display the correct data, this method can create a new view. Heterogeneous lists can specify their number of view types, so that this View is always of the right type (see getViewTypeCount() and getItemViewType(int)).
parent The parent that this view will eventually be attached to
Returns
A View corresponding to the data at the specified position.