Android listview within a fragment

Question

I have an app with 2 tabs. Each tab has it's respective fragment. On one of the tabs I would need to place a listview in order to receive data from stored arrays and place them as a list.

This is my code till now:

public class Frag3 extends Fragment{


    ListView lv1;
    ProgressDialog ShowProgress;
    public ArrayList<Post> PostList = new ArrayList<Post>();
    TextView tv1;
    Button button1;

   @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        if (container == null) {
          return null;
       }
                View view = inflater.inflate(R.layout.tab3, container, false);
                //View tv = view.findViewById(R.id.textView1);

                View listView = view.findViewById(R.id.listView1);

               String[] values = new String[] { "Android", "iPhone", "WindowsMobile",
                    "Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
               "Linux", "OS/2" };

               ArrayAdapter<String> files = new ArrayAdapter<String>(getActivity(), 
                        android.R.layout.simple_list_item_1, 
                        values);

                lv1.setAdapter(files);

        return view;
    }

}

I've tried various options from different web references however none of them seemed to work. Can someone kindly guide me towards a way forward as I'm lost right now and can't seem to understand the next steps.

Solution 1

The biggest issue is mis-matched variable names. You call out lv1 as a class member and set a list adatper against that, but you use listView to find the view. One of those needs to change.

The following change ought to help out:

lv1 = (ListView) view.findViewById(R.id.listView1);    

Solution 2

        public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.tab3, container, false);

        listView = (ListView) view.findViewById(R.id.ListView1);        
        listView.setAdapter(files);

Try doing this in your code

Solution 3

Try extending ListFragment instead of Fragment. This will give you the functionality like onListItemClick for your list. You can also use getListView() when extending ListFragment. Then in your xml you can use the android list id:

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

<TextView android:id="@android:id/empty"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

Then in your onActivityCreated() you can set your list adapter with setListAdapter without having to use findViewById

Comments

[Joakim Engstrom]

If you override the onCreateView in the ListFragment, this, seems by far, the best way to go if you create the layout in xml.