title: onScroll event is not firing for listview
body: <p>I am developing an app where I need to show some list view control. I am just implementing the <code>OnScrollListener</code> in my activity in order to monitor my listview content but it's not invoking the onScroll event when I set the layout for my activity. If i comment that block then it invokes it just fine. How do I solve this issue? </p>
  
  <pre><code>package com.Threadtest;
  
  import com.Threadtest.main.myRunnable;
  
  import android.app.Activity;
  import android.app.ListActivity;
  import android.os.Bundle;
  import android.util.Log;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.AbsListView;
  import android.widget.BaseAdapter;
  import android.widget.ListView;
  import android.widget.TextView;
  import android.widget.AbsListView.OnScrollListener;
  
  public class TestList extends ListActivity implements OnScrollListener {
  
      Aleph0 adapter = new Aleph0();
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.test);
          ListView listview=(ListView)findViewById(android.R.id.list);
          listview.setAdapter(adapter);
          /*setListAdapter(adapter); 
          getListView().setOnScrollListener(this);*/
      }
  
      public void onScroll(AbsListView view,
          int firstVisible, final int visibleCount, int totalCount) {
  
          Log.i("TestList", "firstVisible="+firstVisible+" visibleCount="+visibleCount+" totalCount="+totalCount);
          boolean loadMore = /* maybe add a padding */
              firstVisible + visibleCount &gt;= totalCount;
  
          if(loadMore) {
              Log.i("TestList", "In Notify");
              Thread thread = new Thread()
              {
                    @Override
                    public void run() {
                        try {
                          this.sleep(10000);
                          runOnUiThread(new myRunnable(adapter,visibleCount));
                      } catch (InterruptedException e) {
                          // TODO Auto-generated catch block
                          e.printStackTrace();
                      }
  
  
                    }
                };
  
              thread.start();
  
          }
      }
  
      public void onScrollStateChanged(AbsListView v, int s) { } 
  
      class myRunnable implements Runnable
      {
          Aleph0 adapter;
  
          public myRunnable(Aleph0 adapter,int visibleCount)
          {
  
              this.adapter=adapter;
              this.adapter.count += visibleCount;
          }
          public void run() {
              // TODO Auto-generated method stub
               Log.i("TestList", "List Count="+adapter.count);
                  adapter.notifyDataSetChanged();
          }
  
      }
  
      class Aleph0 extends BaseAdapter {
          int count = 40; /* starting amount */
  
          public int getCount() { return count; }
          public Object getItem(int pos) { return pos; }
          public long getItemId(int pos) { return pos; }
  
          public View getView(int pos, View v, ViewGroup p) {
              if(pos!=count-1)
              {
                  TextView view = new TextView(TestList.this);
                  view.setText("entry " + pos);
                  return view;
              }
              TextView view = new TextView(TestList.this);
              view.setText("Loading.. " + pos);
              return view;
  
          }
      }
  }
  </code></pre>