How to enable fast scrolling for a ListFragment?

问题:

I use a fragment activity to hold a list fragment which renders a bunch of products:

public class ProductsListActivity extends SherlockFragmentActivity {      @Override     public void onCreate(Bundle savedInstanceState) {         setTheme(R.style.Sherlock___Theme);         super.onCreate(savedInstanceState);         setContentView(R.layout.fragment_products_list);         // setFastScrollEnabled(true) ?     } }

...

<!-- fragment_products_list.xml --> <?xml version="1.0" encoding="utf-8"?> <fragment xmlns:android="http://schemas.android.com/apk/res/android"     android:name="com.example.fragment.ProductsListFragment"     android:id="@+id/list_fragment"     android:layout_width="match_parent"     android:layout_height="match_parent" />

...

public class ProductsListFragment extends SherlockListFragment {      @Override     public void onViewCreated(View view, Bundle savedInstanceState) {         // setFastScrollEnabled(true) ?         super.onViewCreated(view, savedInstanceState);     }      @Override     public void onActivityCreated(Bundle savedInstanceState) {         super.onActivityCreated(savedInstanceState);         ...     } }

I want to enable fast scrolling for the list of products and found another post which describes how to do this for a list activity. But how can I activate fast scrolling for the fragment? It would be okay to define this in XML or via code.

回答1:

The SherlockListFragment also has a getListView() method inherited from ListFragment.

getListView().setFastScrollEnabled(true);

This is how it could look like inside your ListFragment:

@Override public void onActivityCreated(Bundle savedInstanceState) {     super.onActivityCreated(savedInstanceState);      ArrayList<String> strings = new ArrayList<String>();      for(int i = 0; i < 300; i++) strings.add("Item " + i);      ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, strings);     setListAdapter(adapter);      getListView().setFastScrollEnabled(true); }

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