I have previsously parsed this RSS Feed, now that I have updated it to use a AsyncTask it now displays a blank screen instead of a filled listviewCODE:
public class CustomizedListView extends Activity {static String URL= "http://scout.org/rss/feed/all";static final String KEY_ITEM = "item"; static final String KEY_TITLE = "title";static final String KEY_DESCRIPTION = "description";static final String KEY_LINK = "link";static final String KEY_PUB_DATE = "pubDate"; String PATH = Environment.getExternalStorageDirectory()+"/SCOUTS/";ListView list;LazyAdapter adapter;@Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.news); SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences(this); URL= sharedPrefs.getString("news_feed", "-1"); ArrayList<HashMap<String, String>> libraryList = new ArrayList<HashMap<String, String>>(); list=(ListView)findViewById(R.id.listView1); adapter=new LazyAdapter(CustomizedListView.this, libraryList); list.setAdapter(adapter); new MyAsyncTask() .execute();} class MyAsyncTask extends AsyncTask<String, Integer, ArrayList<HashMap<String, String>> > { private ProgressDialog progressDialog = new ProgressDialog(CustomizedListView.this); protected void onPreExecute() { progressDialog.setMessage("Loading Latest WOSM News"); progressDialog.show();} ArrayList<HashMap<String, String>> libraryList = new ArrayList<HashMap<String, String>>(); @Override protected ArrayList<HashMap<String, String>> doInBackground(String... params) { try { new DefaultHttpClient().execute(new HttpGet(URL)) .getEntity().writeTo( new FileOutputStream(new File(PATH,"news.xml"))); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } File dir = Environment.getExternalStorageDirectory(); File yourFile = new File(dir, "/SCOUTS/news.xml"); FileInputStream stream = null; try { stream = new FileInputStream(yourFile); } catch (FileNotFoundException e2) { // TODO Auto-generated catch block e2.printStackTrace(); } String jString = null; try { FileChannel fc = stream.getChannel(); MappedByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size()); /* Instead of using default, pass in a decoder. */ jString = Charset.defaultCharset().decode(bb).toString(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { try { stream.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } final ArrayList<HashMap<String, String>> libraryList = new ArrayList<HashMap<String, String>>(); XMLParser parser = new XMLParser(); String xml = jString; Document doc = parser.getDomElement(xml); NodeList nl = doc.getElementsByTagName(KEY_ITEM); for (int i = 0; i < nl.getLength(); i++) { HashMap<String, String> map = new HashMap<String, String>(); Element e = (Element) nl.item(i); map.put(KEY_TITLE, parser.getValue(e, KEY_TITLE)); map.put(KEY_DESCRIPTION, parser.getValue(e, KEY_DESCRIPTION)); map.put(KEY_LINK, parser.getValue(e, KEY_LINK)); map.put(KEY_PUB_DATE, parser.getValue(e, KEY_PUB_DATE)); libraryList.add(map); } return libraryList;} @Override protected void onPostExecute(ArrayList<HashMap<String, String>> result) { list=(ListView)findViewById(R.id.listView1); adapter=new LazyAdapter(CustomizedListView.this, libraryList); list.setAdapter(adapter); this.progressDialog.dismiss(); list.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { HashMap<String, String> map = libraryList.get(position); Intent in = new Intent(CustomizedListView.this, org.scouts.android.news.Podcast.class); in.putExtra(KEY_TITLE, map.get(KEY_TITLE)); in.putExtra(KEY_DESCRIPTION, map.get(KEY_DESCRIPTION)); in.putExtra(KEY_LINK, map.get(KEY_LINK)); in.putExtra(KEY_PUB_DATE, map.get(KEY_PUB_DATE)); startActivity(in); } }); ;}}}I do not know what is causing it but if you can help, please do
