/** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // Each row in the list stores name, wt and icon.
        List<HashMap<String,String>> aList = new ArrayList<HashMap<String,String>>();

        for(int i=0;i<icon.length;i++){
            HashMap<String, String> hm = new HashMap<String,String>();
            hm.put("name", "Name : " + name[i]);
            hm.put("wt","Wt. : " + quantity[i]);
            hm.put("icon", Integer.toString(icon[i]) );
            aList.add(hm);
        }

        // Keys used in Hashmap
        String[] from = { "icon","name","wt" };

        // Ids of views in listview_layout
        int[] to = { R.id.icon,R.id.firstLine,R.id.secondLine};

        // Instantiating an adapter to store each items
        // R.layout.listview_layout defines the layout of each item
        SimpleAdapter adapter = new SimpleAdapter(getBaseContext(), aList, R.layout.listview_layout, from, to);

        // Getting a reference to listview of main.xml layout file
        ListView listView = ( ListView ) findViewById(R.id.listview);

        // Setting the adapter to the listView
        listView.setAdapter(adapter);
    }