How to use ListView OnScroll to load item when we reach end of the ListView.

ListView OnScroll AddItem.txt

import java.util.ArrayList;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends AppCompatActivity {
	ListView list;
	ArrayList<String> al ;
	ArrayAdapter<String> aa;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		list = (ListView) findViewById(R.id.list);
		al = new ArrayList<>();
		addItems();
		aa = new ArrayAdapter<>(getApplicationContext(), android.R.layout.simple_list_item_1, al);
		list.setAdapter(aa);
		list.setOnScrollListener(new OnScrollListener() {
			
			@Override
			public void onScrollStateChanged(AbsListView view, int scrollState) {
				
			}
			
			@Override
			public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
				System.out.println(firstVisibleItem+"---"+visibleItemCount+"---"+totalItemCount);
				// add more items to listview when there are two items remaining at the scroll end.
				if(firstVisibleItem + visibleItemCount >= totalItemCount-2){
					addItems();
					aa.notifyDataSetChanged();
				}
			}
		});
	}
	
	public void addItems(){
		int size = al.size();
		for(int i=size;i<(size+10);i++){
			al.add("List item "+(i+1));
		}
	}
}