Create ListView in code

/*from   www .  j av a  2s .c  om*/
package com.java2s.myapplication3.app;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends ListActivity  {
    String[] presidents = {
            "XML",
            "HTML",
            "CSS",
            "Java",
            "Javascript"
    };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setListAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, presidents));
    }

    public void onListItemClick(
            ListView parent, View v, int position, long id)
    {
        Toast.makeText (this,
                "You have selected " + presidents [position],
                Toast.LENGTH_SHORT).show();
    }

}