What to do about ListActivity/MapActivity when converting to Fragments using the compatibility library?

Question

I'm converting an existing app to the Fragments API using the compatibility library. I've read that you're supposed to update classes that extend Activity to now use FragmentActivity. This is fine for most cases, but what about classes that extend ListActivity or MapActivity? What is the preferred way to handle this? I was hoping there was a ListFragmentActivity or something along those lines, but I don't see one.

Answer 1

This is what I do when converting a ListActivity to the fragments API:

1. Replace lv = getListView(); with lv = (ListView) findViewById(android.R.id.list);

2. Replace setListAdapter(adapter); with lv.setAdapter(adapter);

3. If you have overriden onListItemClick(), replace it with lv.setOnItemClickListener(new ListView.OnItemClickListener() {...

4. You'll have to set the empty view (that shows when there are no results) manually: lv.setEmptyView(findViewById(android.R.id.empty));

   If I'm using CursorLoader, I normally put this in onLoadFinished():

   // if there are no results
   if (data.getCount() == 0) {
       // let the user know
       lv.setEmptyView(findViewById(android.R.id.empty));
   } else {
       // otherwise clear it, so it won't flash in between cursor loads
       lv.setEmptyView(null);
   }
   

5. Speaking of cursor loaders, I'll also convert the activity to use CursorLoader if it isn't already by that point

Answer 2

At least for the ListActivity You can change it to FragmentActivity (Still implementing OnItemCLickListener) and replace:

lv=getListView() to lv=(ListView) findViewById(R.id.your_list_view_id)

and

setListAdapter(favAdapter) to lv.setAdapter(adapter)