Android: nothing on the screen with the List View tutorial
<p>I'm following <a href="http://developer.android.com/resources/tutorials/views/hello-listview.html" rel="nofollow">the List View tutorial</a></p>

<p>and I have this code (very minor modifications):</p>

<pre><code>public class GroupsActivity extends ListActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setListAdapter(new ArrayAdapter&lt;String&gt;(this, R.layout.groups_layout, R.array.repetitions_array));

        ListView lv = getListView();
        lv.setTextFilterEnabled(true);

        lv.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView&lt;?&gt; parent, View view,
                int position, long id) {
                // When clicked, show a toast with the TextView text
                Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
                Toast.LENGTH_SHORT).show();
            }
        });
    }
}
</code></pre>

<p>R.layout.groups_layout is an .xml :</p>

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10dp"
android:textSize="16sp" &gt;
&lt;/TextView&gt;
</code></pre>

<p>the problem is that I see nothing on screen.
Any idea what's wrong ?</p>
