我正在尝试在列表标题中添加 Viewpager（使用支持 library4），但它不显示任何内容。这是我的代码，请帮忙。它将在列表标题中而不是作为一个项目，所以它不应该是一个问题。
public class CustomActivity extends ListActivity {
private static int NUM_AWESOME_VIEWS = 20;
private Context cxt;
private CustomPageAdapter pageAdapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] items = { "this", "is", "my", "list", "view", "data" };
this.cxt = this;
ViewPager viewPager = new ViewPager(this);
pageAdapter = new CustomPageAdapter();
viewPager.setAdapter(pageAdapter);
viewPager.requestLayout();
getListView().addHeaderView(viewPager);
setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, items));
}
private class CustomPageAdapter extends PagerAdapter{
@Override
public int getCount() {
return NUM_AWESOME_VIEWS;
}
/**
* Create the page for the given position. The adapter is responsible
* for adding the view to the container given here, although it only
* must ensure this is done by the time it returns from
* {@link #finishUpdate()}.
*
* @param container The containing View in which the page will be shown.
* @param position The page position to be instantiated.
* @return Returns an Object representing the new page. This does not
* need to be a View, but can be some other container of the page.
*/
@Override
public Object instantiateItem(View collection, int position) {
TextView tv = new TextView(cxt);
tv.setText("Bonjour PAUG " + position);
tv.setTextColor(Color.WHITE);
tv.setTextSize(20);
((ViewPager) collection).addView(tv,0);
return tv;
}
/**
* Remove a page for the given position. The adapter is responsible
* for removing the view from its container, although it only must ensure
* this is done by the time it returns from {@link #finishUpdate()}.
*
* @param container The containing View from which the page will be removed.
* @param position The page position to be removed.
* @param object The same object that was returned by
* {@link #instantiateItem(View, int)}.
*/
@Override
public void destroyItem(View collection, int position, Object view) {
((ViewPager) collection).removeView((TextView) view);
}
@Override
public boolean isViewFromObject(View view, Object object) {
return view==((TextView)object);
}
/**
* Called when the a change in the shown pages has been completed. At this
* point you must ensure that all of the pages have actually been added or
* removed from the container as appropriate.
* @param container The containing View which is displaying this adapter's
* page views.
*/
@Override
public void finishUpdate(View arg0) {
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View arg0) {
}
}
}