title: Having trouble gett my fragment to populate a listView using an asynctask
body: <p>I have been busting my head over this for a whole day now, so I figured I would ask for some help. I am trying to get this fragment to properly populate the listView, but no matter what I do, I get a nullpointer exception. I am sure I am missing something really small and I hope someone can point it out for me :) </p>
  
  <pre><code>package com.jaymzzz;
  
  import android.app.Activity;
  import android.app.ProgressDialog;
  import android.content.Context;
  import android.os.AsyncTask;
  import android.os.Bundle;
  import android.util.Log;
  import android.view.LayoutInflater;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.ListView;
  import android.widget.Toast;
  import com.actionbarsherlock.app.SherlockListFragment;
  import com.actionbarsherlock.widget.SearchView;
  import org.json.JSONArray;
  import org.json.JSONObject;
  import java.util.ArrayList;
  import java.util.List;
  
  public class TestAPICallFragment extends SherlockListFragment implements SearchView.OnQueryTextListener {
  ListView listView;
  ItemListAdapter itemListAdapter;
  Context context;
  
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setRetainInstance(true);
  
  }
  
  @Override
  public void onResume() {
      super.onResume();
      new JSONFromAPI().execute(new String[]{"https://api.jaymzzz.com/api/json"});
  }
  
  public void onAttach(Activity activity) {
      super.onAttach(activity);
      context = this.getActivity();
  }
  
  
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      View fragmentView = inflater.inflate(R.layout.fragment, container, false);
      listView = (ListView) fragmentView.findViewById(android.R.id.list);
      return fragmentView;
  }
  
  
  @Override
  public boolean onQueryTextSubmit(String query) {
      Toast.makeText(getActivity(), query, Toast.LENGTH_SHORT);
      Log.d("errlog", "Search query = " + query);
      return false;
  }
  
  @Override
  public boolean onQueryTextChange(String newText) {
      Log.d("errlog", "Search query changed to " + newText);
      return false;  //To change body of implemented methods use File | Settings | File Templates.
  }
  
  private class JSONFromAPI extends AsyncTask&lt;String, Void, JSONObject&gt; {
  
      ProgressDialog dialog = new ProgressDialog(getActivity());
  
      protected void onPreExecute() {
          dialog.setMessage("Loading...");
          dialog.show();
      }
  
      protected JSONObject doInBackground(String... urlString) {
          String url = urlString[0];
  
          JSONObject json = new utilGetJSONFromAPI().getJSONFromAPI(url);
          Log.d("errlog", "Leaving doInBackground");
  
          if (dialog.isShowing()) {
              dialog.dismiss();
          }
          return json;
      }
  
      protected void onPostExecute(JSONObject json) {
  
          Log.d("errlog", "Initiating onPostExecute()");
  
          List&lt;ItemEntry&gt; items = new ArrayList&lt;ItemEntry&gt;();
  
          try {
              JSONArray message = json.getJSONArray("message");
  
              Log.d("errlog", "Message size: " + message.length());
  
  
              for (int i = 0; i &lt; message.length(); i++) {
                  JSONObject e = message.getJSONObject(i);
                  items.add(new ItemEntry(e.getString("item_name"), e.getString("item_brand_name"), e.getInt("item_id")));
  
              }
          } catch (Exception e) {
              Log.e("errlog", "Error parsing data " + e.toString());
          }
  
          itemListAdapter = new ItemListAdapter(context, R.layout.list_item, R.id.title, R.id.subtitle);
  
          try {
              listView.setAdapter(itemListAdapter); // THE LINE THAT KEEPS FAILING
  
              for (final ItemEntry entry : items) {
                  itemListAdapter.add(entry);
              }
          } catch (Exception e) {
              Toast.makeText(context, "Error Loading data..", Toast.LENGTH_SHORT).show();
              e.printStackTrace();
          }
  
      }
    }
  
  
  }
  </code></pre>
  
  <p>Here is the stack trace as well:</p>
  
  <blockquote>
    <p>12-01 06:33:27.142: WARN/System.err(3003): java.lang.NullPointerException
    12-01 06:33:27.142: WARN/System.err(3003): at com.jaymzzz.TestAPICallFragment$JSONFromAPI.onPostExecute(TestAPICallFragment.java:117)
    12-01 06:33:27.152: WARN/System.err(3003): at com.jaymzzz.TestAPICallFragment$JSONFromAPI.onPostExecute(TestAPICallFragment.java:72)
    12-01 06:33:27.152: WARN/System.err(3003): at >android.os.AsyncTask.finish(AsyncTask.java:602)
    12-01 06:33:27.152: WARN/System.err(3003): at android.os.AsyncTask.access$600(AsyncTask.java:156)
    12-01 06:33:27.152: WARN/System.err(3003): at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)
    12-01 06:33:27.152: WARN/System.err(3003): at >android.os.Handler.dispatchMessage(Handler.java:99)
    12-01 06:33:27.152: WARN/System.err(3003): at android.os.Looper.loop(Looper.java:137)
    12-01 06:33:27.152: WARN/System.err(3003): at android.app.ActivityThread.main(ActivityThread.java:4340)
    12-01 06:33:27.152: WARN/System.err(3003): at java.lang.reflect.Method.invokeNative(Native >Method)
    12-01 06:33:27.162: WARN/System.err(3003): at >java.lang.reflect.Method.invoke(Method.java:511)
    12-01 06:33:27.162: WARN/System.err(3003): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
    12-01 06:33:27.162: WARN/System.err(3003): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
    12-01 06:33:27.162: WARN/System.err(3003): at dalvik.system.NativeStart.main(Native Method)</p>
  </blockquote>
  
  <p>Help, please :)</p>