No items on ListView using SimpleAdapter

Question

I'm trying to display values of my ArrayList in my ListView. Values lists exist, I checked it with a debugger and Log.d

This is my class:

public class SIPSettingsFragment extends ListFragment implements View.OnClickListener, AsyncResponse {

    public SIPSettingsFragment() {
    }

    TextView username, password;
    Button adduser,showUserForm, showUserListForm;
    private ListView listView;
    private ListAdapter adapter;
    private static final String TAG_USERNAME = "usrname";
    public ArrayList<HashMap<String, String>> usersList = new ArrayList<HashMap<String, String>>();

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

        View rootView = inflater.inflate(R.layout.fragment_sipsettings, container, false);

/*
code
*/

Log.d("lab","Size: " +  usersList.size()); //3

        adapter = new SimpleAdapter(this.getActivity(),usersList, R.layout.sipuser_list_item,
                                                new String[] { TAG_USERNAME }, new int[] { R.id.name});
        listView = (ListView) rootView.findViewById(android.R.id.list);


        listView.setAdapter(adapter);

        return rootView;
 }

}

My fragment_sipsettings.xml

  <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/userListLayout"
        android:layout_gravity="center_horizontal">
        <include layout="@layout/sipuser_list_item"/>
           <ListView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@android:id/list" />

    </LinearLayout>

And sipuser_list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:id="@+id/name"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:paddingBottom="2dip"
        android:paddingTop="6dip"
        android:textColor="#43bd00"
        android:textSize="16sp"
        android:textStyle="bold"
        />


</LinearLayout>

And where is problem?

Edit: I put my AsyncTaks class in my SIPSettingsFragment class

 public class DownloadJSON extends AsyncTask<Void, Void, Void> {


        protected Void doInBackground(Void... params) {

            usersList = new ArrayList<>();

            String urlName ="http://192.168.0.196:8080/openapi/localuser/list?{\"syskey\":\"s\"}";

            JSONParser jParser = new JSONParser();

            JSONArray json = jParser.getJSONFromUrl(urlName);

            try {


                for (int i = 0; i < json.length(); i++) {

                    JSONObject c = json.getJSONObject(i);

                    String username = c.getString(TAG_USERNAME);
                  //  String description = c.getString(TAG_DESCRIPTION);
                 //   String displayname = c.getString(TAG_DISPLAYNAME);
                  //  String addr = c.getString(TAG_ADDR);
                  //  String state = c.getString(TAG_STATE);

                    HashMap<String, String> map = new HashMap<>();


                    map.put(TAG_USERNAME,username);
                    // map.put(TAG_DESCRIPTION, description);
                    //   map.put(TAG_DISPLAYNAME, displayname);
                    ////  map.put(TAG_ADDR, addr);
                    //   map.put(TAG_STATE, state);

                    usersList.add(map);

                    Log.d("lab", "Username: " + username);

                }
            }catch (JSONException e){
                Log.d("lab", "JSON EX: " + e.toString());
            }

            return null;
        }

And I execute this in SIPSettingsFragment new DownloadJSON().execute();

But still I don't have data.

EDIT:

I modify:

@Override
        protected void onPostExecute(Void args){
            listView = (ListView) getActivity().findViewById(android.R.id.list);
            adapter = new SimpleAdapter(
                    getActivity(),
                    usersList,
                    R.layout.sipuser_list_item,
                    new String[] { TAG_USERNAME },
                    new int[] { R.id.name}
            );

        listView.setAdapter(adapter);
        ((SimpleAdapter) adapter).notifyDataSetChanged();
    }

But still nothing..

Answer 1

Your adapter has an empty data.

adapter = new SimpleAdapter(this.getActivity(),  //context
               usersList,                        //data
               R.layout.sipuser_list_item,       //resource
               new String[] { TAG_USERNAME },    //from
               new int[] { R.id.name});          //to

userlist is initialized but empty.

If you are using an AsyncTask to change the data, you have to use the notifyDatasetChanged() method to notify the adapter about the update.

public class DownloadJSON extends AsyncTask<Void, Void, Void> {  

   @Override
   protected void onPostExecute(Void result) {
     //....
     adapter.notifyDataSetChanged();
 }

Answer 2

You fetching data using Async class. I assume you need to update the list when its downloaded the JSON data. So you need to update the adapter in onPostExexute

public class DownloadJSON extends AsyncTask<Void, Void, Void> {  
    protected Void doInBackground(Void... params) {
     // Your Existing Code
   }

   protected void onPostExecute(Void result) {
     // Refresh your list here and make sure you have data in your array
     adapter.notifyDataSetChanged();
 }