Android PagerAdapter not calling instantiateItem

I'm trying to implement ViewPager with PagerAdapter in my app. I'm mainly working off this example. My `PagerAdapter` is called DataPagerAdapter and uses the following constructor and `instantiateItem`, where I inflate a view from `data_list_view.xml`: ``` public class DataPagerAdapter extends PagerAdapter implements TitleProvider { private LayoutInflater mInflater; private static String[] titles = new String[] { "Page 1", "Page 2", "Page 3" }; private final Context context; public DataPagerAdapter( Context context ) { this.context = context; } @Override public String getTitle( int position ) { return titles[ position ]; } @Override public int getCount() { return titles.length; } @Override public Object instantiateItem( View pager, int position ) { ListView v = (ListView) mInflater.inflate(R.layout.data_list_view, null); ((ViewPager)pager).addView( v, 0 ); return v; } @Override public void destroyItem( View pager, int position, Object view ) { ((ViewPager)pager).removeView( (ListView)view ); } @Override public boolean isViewFromObject( View view, Object object ) { return view.equals( object ); } @Override public void finishUpdate( View view ) {} @Override public void restoreState( Parcelable p, ClassLoader c ) {} @Override public Parcelable saveState() { return null; } @Override public void startUpdate( View view ) {} } ``` And in my activity I get my adapter: ``` DataPagerAdapter adapter = new DataPagerAdapter( this ); ``` And then later I want to refer to my dataListView in code: ``` dataListView = (ListView) findViewById(R.id.listViewData); ``` Problem is, the `dataListView` is returned as null by the `findViewById` call since the `instantiateItem` is never processed. When is `instantiateItem` called and is this done automatically (as the example seems to suggest) or do I have to force it somehow?