download a file from xml file
===

i insert to 1 xml file url for music mp3 file address but i dont khnow how to download this file 
pleas help me to solve thiis

		
		String xml = parser.getXmlFromUrl(URL); // getting XML from URL
		Document doc = parser.getDomElement(xml); // getting DOM element
		
		NodeList nl = doc.getElementsByTagName(KEY_SONG);
		// looping through all song nodes <song>
		for (int i = 0; i < nl.getLength(); i++) {
			// creating new HashMap
			HashMap<String, String> map = new HashMap<String, String>();
			Element e = (Element) nl.item(i);
			// adding each child node to HashMap key => value
			map.put(KEY_DURATION, parser.getValue(e, KEY_DURATION));
			map.put(KEY_THUMB_URL, parser.getValue(e, KEY_THUMB_URL));
			**map.put(KEY_URL, parser.getValue(e, KEY_URL));**
			// adding HashList to ArrayList
			songsList.add(map);
		}
		

		list=(ListView)findViewById(R.id.list);
		
		// Getting adapter by passing xml data ArrayList
        adapter=new LazyAdapter(this, songsList);        
        list.setAdapter(adapter);
        

        // Click event for single list row
        list.setOnItemClickListener(new OnItemClickListener() {

			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
							
			
				
				
			}
		});	


in the onItemClick i dont khnow what i whrite
