title: ListFragment Load more on scroll end
body: <p>I have for my ListFragment and was wondering what the best way to load more content within the list when I reach the bottom, I believe I need to implement a Scroll Listener but I was a little confused on where and when to have the call performed, if someone can shed some light that would be much appreciated, I know my codes a tad bit messy right now too since I am just testing this out, so apologies for that. </p>
  
  <p>Code: 
  <strong>TestListFragment</strong></p>
  
  <pre><code>package com.fragments;
  
  public class TestListFragment extends ListFragment
          implements
          android.support.v4.app.LoaderManager.LoaderCallbacks&lt;List&lt;TestItemModel&gt;&gt; {
  
      TestCustomArrayAdapter _adapter;
  
      @Override
      public void onActivityCreated(Bundle savedInstanceState) {
          super.onActivityCreated(savedInstanceState);
  
          System.out.println("TestListFragment.onActivityCreated");
  
          // Initially there is no data
          setEmptyText("Refresh: No Data Here");
  
          // Create an empty adapter we will use to display the loaded data.
          _adapter = new TestCustomArrayAdapter(getActivity());
          setListAdapter(_adapter);
  
          // Start out with a progress indicator.
          setListShown(false);
  
          // Prepare the loader. Either re-connect with an existing one,
          // or start a new one.
          getLoaderManager().initLoader(0, null, this);
  
      }
  
      @Override
      public void onListItemClick(ListView l, View v, int position, long id) {
          // Insert desired behavior here.
          Log.i("TestListFragment", "Item clicked: " + id);
          TestItemModel ti = this._adapter.getItem(position);
          System.out.println(ti.getId());
  
      }
  
      @Override
      public Loader&lt;List&lt;TestItemModel&gt;&gt; onCreateLoader(int arg0, Bundle arg1) {
          System.out.println("TestListFragment.onCreateLoader");
          return new TestListLoaderAsync(getActivity());
      }
  
      @Override
      public void onLoadFinished(Loader&lt;List&lt;TestItemModel&gt;&gt; arg0,
              List&lt;TestItemModel&gt; data) {
          _adapter.setData(data);
          System.out.println("TestListFragment.onLoadFinished");
          // The list should now be shown.
          if (isResumed()) {
              setListShown(true);
          } else {
              setListShownNoAnimation(true);
          }
      }
  
      @Override
      public void onLoaderReset(Loader&lt;List&lt;TestItemModel&gt;&gt; arg0) {
          _adapter.setData(null);
      }
  
  }
  </code></pre>
  
  <p><strong>TestCustomArrayAdapter</strong></p>
  
  <pre><code>package com.adapters;
  
  public class TestCustomArrayAdapter extends ArrayAdapter&lt;TestItemModel&gt; {
      private final LayoutInflater _inflater;
      public OnItemClickListener _ol;
      public ImageLoader _imageLoader;
  
      public TestCustomArrayAdapter(Context context) {
          super(context, R.layout.test_list_fragment);
          _inflater = (LayoutInflater) context
                  .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  
          // Load up Image Loader
          _imageLoader = new ImageLoader(context);
  
      }
  
      public void setData(List&lt;TestItemModel&gt; data) {
          clear();
          if (data != null) {
              for (TestItemModel appEntry : data) {
                  add(appEntry);
              }
          }
      }
  
      /**
       * Populate new items in the list.
       */
      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
          // create viewHolder
          View view;
  
          // Check Views
          if (convertView == null) {
              view = _inflater.inflate(R.layout.test_single_item, parent, false);
          } else {
              view = convertView;
          }
  
          // Create Items
          TestItemModel item = getItem(position);
  
          TextView itemLabel = (TextView) view.findViewById(R.id.item_label);
          TextView itemId = (TextView) view.findViewById(R.id.item_id);
  
          // Create ImageViews
          ImageView image = (ImageView) view.findViewById(R.id.image_id);
  
          // Create Buttons
          Button btn1 = (Button) view.findViewById(R.id.button_id_1);
          Button btn2 = (Button) view.findViewById(R.id.button_id_2);
          Button btn3 = (Button) view.findViewById(R.id.button_id_3);
  
          // Create Resources
          Resources resources = this.getContext().getResources();
  
          // Create Listeners
          _ol = new OnItemClickListener(position, item);
  
          // Setup TextViews
          itemLabel.setText(item.getName());
          itemId.setText(item.getName());
  
          // Setup Images
          _imageLoader.DisplayImage(item.getBm(), image);
  
          // Setup Buttons
          btn1.setOnClickListener(_ol);
          btn1.setTag(1);
          btn2.setOnClickListener(_ol);
          btn2.setTag(2);
          btn3.setOnClickListener(_ol);
          btn3.setTag(3);
  
          return view;
      }
  
      private class OnItemClickListener implements OnClickListener {
          private int _position;
          private TestItemModel _testItem;
  
          public OnItemClickListener(int position, TestItemModel ti) {
              _position = position;
              _testItem = ti;
          }
  
          // TODO
          // provide functionality for which button was clicked then pass the item
          // to which it was clicked in.
          @Override
          public void onClick(View v) {
              switch (v.getId()) {
              case R.id.button_id_1:
                  // btn1 clicked
                  Toast.makeText(getContext(),
                          " Button1 clicked at positon" + v.getTag(),
                          Toast.LENGTH_SHORT).show();
                  break;
              case R.id.button_id_2:
                  // btn2 clicked
                  Toast.makeText(getContext(),
                          " Button2 clicked at positon" + v.getTag(),
                          Toast.LENGTH_SHORT).show();
                  break;
              case R.id.button_id_3:
                  Toast.makeText(getContext(),
                          " Button3 clicked at positon" + v.getTag(),
                          Toast.LENGTH_SHORT).show();
                  // btn 3 clciked
                  break;
              }
  
              // the view is the button, so you get get the tag it has set with
              // v.getTag() to know what button is pressed.
              Log.v("YOOO",
                      "Button Click at position " + _position + " " + v.getTag()
                              + " Item ID = " + _testItem.getId());
  
          }
      }
  
  }
  </code></pre>
  
  <p><strong>TestListLoaderAsync</strong></p>
  
  <p>package com.tasks;</p>
  
  <p>public class TestListLoaderAsync extends AsyncTaskLoader> {</p>
  
  <pre><code>private List&lt;TestItemModel&gt; _models;
  
  // Test URLS
  private final String[] URLS = {
          "http://www.pressurewasherparts.com.au/upimages/image/Water_Broom/Water%20Broom%203%20Noz%20upright.jpg",
          "http://www.pressurewasherparts.com.au/upimages/image/Water_Broom/Water%20Broom%203%20Noz%20upright.jpg",
          "http://lh3.ggpht.com/_GEnSvSHk4iE/TDSfmyCfn0I/AAAAAAAAF8Y/cqmhEoxbwys/s144-c/_MG_3675.jpg",
          "http://lh6.ggpht.com/_Nsxc889y6hY/TBp7jfx-cgI/AAAAAAAAHAg/Rr7jX44r2Gc/s144-c/IMGP9775a.jpg",
          "http://lh3.ggpht.com/_lLj6go_T1CQ/TCD8PW09KBI/AAAAAAAAQdc/AqmOJ7eg5ig/s144-c/Juvenile%20Gannet%20despute.jpg",
          "http://lh6.ggpht.com/_ZN5zQnkI67I/TCFFZaJHDnI/AAAAAAAABVk/YoUbDQHJRdo/s144-c/P9250508.JPG",
          "http://lh4.ggpht.com/_XjNwVI0kmW8/TCOwNtzGheI/AAAAAAAAC84/SxFJhG7Scgo/s144-c/0014.jpg",
          "http://lh6.ggpht.com/_lnDTHoDrJ_Y/TBvKsJ9qHtI/AAAAAAAAG6g/Zll2zGvrm9c/s144-c/000007.JPG",
          "http://lh6.ggpht.com/_qvCl2efjxy0/TCIVI-TkuGI/AAAAAAAAOUY/vbk9MURsv48/s144-c/DSC_0844.JPG",
          "http://lh4.ggpht.com/_TPlturzdSE8/TBv4ugH60PI/AAAAAAAAMsI/p2pqG85Ghhs/s144-c/_MG_3963.jpg",
          "http://lh4.ggpht.com/_4f1e_yo-zMQ/TCe5h9yN-TI/AAAAAAAAXqs/8X2fIjtKjmw/s144-c/IMG_1786.JPG",
          "http://lh6.ggpht.com/_iFt5VZDjxkY/TB9rQyWnJ4I/AAAAAAAADpU/lP2iStizJz0/s144-c/DSCF1014.JPG",
          "http://lh5.ggpht.com/_hepKlJWopDg/TB-_WXikaYI/AAAAAAAAElI/715k4NvBM4w/s144-c/IMG_0075.JPG",
          "http://lh6.ggpht.com/_OfRSx6nn68g/TCzsQic_z3I/AAAAAAABOOI/5G4Kwzb2qhk/s144-c/EASTER%20ISLAND_Hanga%20Roa_31.5.08_46.JPG",
          "http://lh6.ggpht.com/_ZGv_0FWPbTE/TB-_GLhqYBI/AAAAAAABVxs/cVEvQzt0ke4/s144-c/IMG_1288_hf.jpg",
          "http://lh6.ggpht.com/_a29lGRJwo0E/TBqOK_tUKmI/AAAAAAAAVbw/UloKpjsKP3c/s144-c/31012332.jpg",
          "http://lh3.ggpht.com/_55Lla4_ARA4/TB6xbyxxJ9I/AAAAAAABTWo/GKe24SwECns/s144-c/Bluebird%20049.JPG",
          "http://lh3.ggpht.com/_iVnqmIBYi4Y/TCaOH6rRl1I/AAAAAAAA1qg/qeMerYQ6DYo/s144-c/Kwiat_100626_0016.jpg",
          "http://lh6.ggpht.com/_QFsB_q7HFlo/TCItd_2oBkI/AAAAAAAAFsk/4lgJWweJ5N8/s144-c/3705226938_d6d66d6068_o.jpg",
          "http://lh5.ggpht.com/_JTI0xxNrKFA/TBsKQ9uOGNI/AAAAAAAChQg/z8Exh32VVTA/s144-c/CRW_0015-composite.jpg",
          "http://lh6.ggpht.com/_loGyjar4MMI/S-InVNkTR_I/AAAAAAAADJY/Fb5ifFNGD70/s144-c/Moving%20Rock.jpg",
          "http://lh4.ggpht.com/_L7i4Tra_XRY/TBtxjScXLqI/AAAAAAAAE5o/ue15HuP8eWw/s144-c/opera%20house%20II.jpg",
          "http://lh3.ggpht.com/_rfAz5DWHZYs/S9cstBTv1iI/AAAAAAAAeYA/EyZPUeLMQ98/s144-c/DSC_6425.jpg",
          "http://lh6.ggpht.com/_iGI-XCxGLew/S-iYQWBEG-I/AAAAAAAACB8/JuFti4elptE/s144-c/norvig-polar-bear.jpg",
          "http://lh3.ggpht.com/_M3slUPpIgmk/SlbnavqG1cI/AAAAAAAACvo/z6-CnXGma7E/s144-c/mf_003.jpg",
          "http://lh4.ggpht.com/_loGyjar4MMI/S-InQvd_3hI/AAAAAAAADIw/dHvCFWfyHxQ/s144-c/Rainbokeh.jpg",
          "http://lh4.ggpht.com/_yy6KdedPYp4/SB5rpK3Zv0I/AAAAAAAAOM8/mokl_yo2c9E/s144-c/Point%20Reyes%20road%20.jpg",
          "http://lh5.ggpht.com/_6_dLVKawGJA/SMwq86HlAqI/AAAAAAAAG5U/q1gDNkmE5hI/s144-c/mobius-glow.jpg",
          "http://lh3.ggpht.com/_QFsB_q7HFlo/TCItc19Jw3I/AAAAAAAAFs4/nPfiz5VGENk/s144-c/4551649039_852be0a952_o.jpg",
          "http://lh6.ggpht.com/_TQY-Nm7P7Jc/TBpjA0ks2MI/AAAAAAAABcI/J6ViH98_poM/s144-c/IMG_6517.jpg",
          "http://lh3.ggpht.com/_rfAz5DWHZYs/S9cLAeKuueI/AAAAAAAAeYU/E19G8DOlJRo/s144-c/DSC_4397_8_9_tonemapped2.jpg",
          "http://lh4.ggpht.com/_TQY-Nm7P7Jc/TBpi6rKfFII/AAAAAAAABbg/79FOc0Dbq0c/s144-c/david_lee_sakura.jpg",
          "http://lh3.ggpht.com/_TQY-Nm7P7Jc/TBpi8EJ4eDI/AAAAAAAABb0/AZ8Cw1GCaIs/s144-c/Hokkaido%20Swans.jpg",
          "http://lh3.ggpht.com/_1aZMSFkxSJI/TCIjB6od89I/AAAAAAAACHM/CLWrkH0ziII/s144-c/079.jpg",
          "http://lh5.ggpht.com/_loGyjar4MMI/S-InWuHkR9I/AAAAAAAADJE/wD-XdmF7yUQ/s144-c/Colorado%20River%20Sunset.jpg",
          "http://lh3.ggpht.com/_0YSlK3HfZDQ/TCExCG1Zc3I/AAAAAAAAX1w/9oCH47V6uIQ/s144-c/3138923889_a7fa89cf94_o.jpg",
          "http://lh6.ggpht.com/_K29ox9DWiaM/TAXe4Fi0xTI/AAAAAAAAVIY/zZA2Qqt2HG0/s144-c/IMG_7100.JPG",
          "http://lh6.ggpht.com/_0YSlK3HfZDQ/TCEx16nJqpI/AAAAAAAAX1c/R5Vkzb8l7yo/s144-c/4235400281_34d87a1e0a_o.jpg",
          "http://lh4.ggpht.com/_8zSk3OGcpP4/TBsOVXXnkTI/AAAAAAAAAEo/0AwEmuqvboo/s144-c/yosemite_forrest.jpg",
          "http://lh4.ggpht.com/_6_dLVKawGJA/SLZToqXXVrI/AAAAAAAAG5k/7fPSz_ldN9w/s144-c/coastal-1.jpg",
          "http://lh4.ggpht.com/_WW8gsdKXVXI/TBpVr9i6BxI/AAAAAAABhNg/KC8aAJ0wVyk/s144-c/IMG_6233_1_2-2.jpg",
          "http://lh3.ggpht.com/_loGyjar4MMI/S-InS0tJJSI/AAAAAAAADHU/E8GQJ_qII58/s144-c/Windmills.jpg",
          "http://lh4.ggpht.com/_loGyjar4MMI/S-InbXaME3I/AAAAAAAADHo/4gNYkbxemFM/s144-c/Frantic.jpg",
          "http://lh5.ggpht.com/_loGyjar4MMI/S-InKAviXzI/AAAAAAAADHA/NkyP5Gge8eQ/s144-c/Rice%20Fields.jpg",
          "http://lh3.ggpht.com/_loGyjar4MMI/S-InZA8YsZI/AAAAAAAADH8/csssVxalPcc/s144-c/Seahorse.jpg",
          "http://lh3.ggpht.com/_syQa1hJRWGY/TBwkCHcq6aI/AAAAAAABBEg/R5KU1WWq59E/s144-c/Antelope.JPG",
          "http://lh5.ggpht.com/_MoEPoevCLZc/S9fHzNgdKDI/AAAAAAAADwE/UAno6j5StAs/s144-c/c84_7083.jpg",
          "http://lh4.ggpht.com/_DJGvVWd7IEc/TBpRsGjdAyI/AAAAAAAAFNw/rdvyRDgUD8A/s144-c/Free.jpg",
          "http://lh6.ggpht.com/_iO97DXC99NY/TBwq3_kmp9I/AAAAAAABcz0/apq1ffo_MZo/s144-c/IMG_0682_cp.jpg",
          "http://lh4.ggpht.com/_7V85eCJY_fg/TBpXudG4_PI/AAAAAAAAPEE/8cHJ7G84TkM/s144-c/20100530_120257_0273-Edit-2.jpg" };
  
  public TestListLoaderAsync(Context context) {
      super(context);
  }
  
  @Override
  public List&lt;TestItemModel&gt; loadInBackground() {
  
      System.out.println("TestListLoader.loadInBackground");
  
      // You should perform the heavy task of getting data from
      // Internet or database or other source
      // Here, we are generating some Sample data
  
      // Create corresponding array of entries and load with data.
      List&lt;TestItemModel&gt; entries = new ArrayList&lt;TestItemModel&gt;(5);
      entries.add(new TestItemModel("Java", "1", URLS[1]));
      entries.add(new TestItemModel("C++", "2", URLS[2]));
      entries.add(new TestItemModel("Python", "3", URLS[3]));
      entries.add(new TestItemModel("JavaScript", "4", URLS[4]));
      entries.add(new TestItemModel("D", "5", URLS[5]));
      entries.add(new TestItemModel("C", "6", URLS[6]));
      entries.add(new TestItemModel("Perl", "7", URLS[7]));
      entries.add(new TestItemModel("Fortran", "8", URLS[8]));
      entries.add(new TestItemModel("Cobalt", "9", URLS[9]));
      entries.add(new TestItemModel("Ruby", "10", URLS[10]));
      entries.add(new TestItemModel("Pascal", "11", URLS[11]));
      entries.add(new TestItemModel("HTML", "12", URLS[12]));
      entries.add(new TestItemModel("CSS", "13", URLS[13]));
      entries.add(new TestItemModel("PHP", "14", URLS[14]));
      entries.add(new TestItemModel("MYSQL", "15", URLS[15]));
      entries.add(new TestItemModel("Fortran", "8", URLS[16]));
      entries.add(new TestItemModel("Cobalt", "9", URLS[17]));
      entries.add(new TestItemModel("Ruby", "10", URLS[18]));
      entries.add(new TestItemModel("Pascal", "11", URLS[19]));
      entries.add(new TestItemModel("HTML", "12", URLS[20]));
      entries.add(new TestItemModel("CSS", "13", URLS[21]));
      entries.add(new TestItemModel("PHP", "14", URLS[22]));
      entries.add(new TestItemModel("MYSQL", "15", URLS[23]));
  
      TestItemModel lastItem = new TestItemModel("C#", "16", URLS[0]);
  
      lastItem.setId("TestingId");
      entries.add(lastItem);
  
      return entries;
  }
  
  /**
   * Called when there is new data to deliver to the client. The super class
   * will take care of delivering it; the implementation here just adds a
   * little more logic.
   */
  @Override
  public void deliverResult(List&lt;TestItemModel&gt; listOfData) {
      if (isReset()) {
          // An async query came in while the loader is stopped. We
          // don't need the result.
          if (listOfData != null) {
              onReleaseResources(listOfData);
          }
      }
      List&lt;TestItemModel&gt; oldApps = listOfData;
      _models = listOfData;
  
      if (isStarted()) {
          // If the Loader is currently started, we can immediately
          // deliver its results.
          super.deliverResult(listOfData);
      }
  
      // At this point we can release the resources associated with
      // 'oldApps' if needed; now that the new result is delivered we
      // know that it is no longer in use.
      if (oldApps != null) {
          onReleaseResources(oldApps);
      }
  }
  
  /**
   * Handles a request to start the Loader.
   */
  @Override
  protected void onStartLoading() {
      if (_models != null) {
          // If we currently have a result available, deliver it
          // immediately.
          deliverResult(_models);
      }
  
      if (takeContentChanged() || _models == null) {
          // If the data has changed since the last time it was loaded
          // or is not currently available, start a load.
          forceLoad();
      }
  }
  
  /**
   * Handles a request to stop the Loader.
   */
  @Override
  protected void onStopLoading() {
      // Attempt to cancel the current load task if possible.
      cancelLoad();
  }
  
  /**
   * Handles a request to cancel a load.
   */
  @Override
  public void onCanceled(List&lt;TestItemModel&gt; apps) {
      super.onCanceled(apps);
  
      // At this point we can release the resources associated with 'apps'
      // if needed.
      onReleaseResources(apps);
  }
  
  /**
   * Handles a request to completely reset the Loader.
   */
  @Override
  protected void onReset() {
      super.onReset();
  
      // Ensure the loader is stopped
      onStopLoading();
  
      // At this point we can release the resources associated with 'apps'
      // if needed.
      if (_models != null) {
          onReleaseResources(_models);
          _models = null;
      }
  }
  
  /**
   * Helper function to take care of releasing resources associated with an
   * actively loaded data set.
   */
  protected void onReleaseResources(List&lt;TestItemModel&gt; apps) {
  }
  </code></pre>
  
  <p>}</p>