RSS simply means Really Simple syndication, this is a xml document which is created by a website.
You need to parse this xml file and show the information:-

Here is the code that can help you :-

Step 1:-Declare the variable of which you want to extract information:-

 private String windSpeed, city,country,windChillDegree;

Step 2:-Function to Fetch String response using url:-

private String fetchResponse()
    {
      String result = "";
      String myQuery = "http://weather.yahooapis.com/forecastrss?w=2459115";

      HttpClient httpClient = new DefaultHttpClient();
      HttpGet httpGet = new HttpGet(myQuery);

      try{
        HttpEntity httpEntity = httpClient.execute(httpGet).getEntity();

        if (httpEntity != null){
            InputStream inputStream = httpEntity.getContent();
            Reader in = new InputStreamReader(inputStream);
            BufferedReader bufferedreader = new BufferedReader(in);
            StringBuilder stringBuilder = new StringBuilder();

            String stringReadLine = null;

            while ((stringReadLine = bufferedreader.readLine()) != null) {
                stringBuilder.append(stringReadLine + "\n");    
            }

            result = stringBuilder.toString();  
           }

           } catch (ClientProtocolException e) {
            e.printStackTrace();
           } catch (IOException e) {
            e.printStackTrace();
           }
       return result;
    }

Step 3:-Create a function that convert above string response to Document:-

private Document convertStringToDocument(String src)
      {
        Document document = null;
        DocumentBuilderFactory dbFactory =DocumentBuilderFactory.newInstance();
        DocumentBuilder parser;
          try {
            parser = dbFactory.newDocumentBuilder();
        document = parser.parse(new ByteArrayInputStream(src.getBytes()));
          } catch (ParserConfigurationException e1) {
            e1.printStackTrace();
            Toast.makeText(AndroidYahooWeatherDOMActivity.this, 
                    e1.toString(), Toast.LENGTH_LONG).show();
        } catch (SAXException e) {
            e.printStackTrace();
            Toast.makeText(AndroidYahooWeatherDOMActivity.this, 
                    e.toString(), Toast.LENGTH_LONG).show();
        } catch (IOException e) {
            e.printStackTrace();
            Toast.makeText(AndroidYahooWeatherDOMActivity.this, 
                    e.toString(), Toast.LENGTH_LONG).show();
        }

        return document;
    }

Step 4:-Create a function that parse the converted document:-

private void parseWeather(Document srcDoc)
  {       
        Node locationNode = srcDoc.getElementsByTagName("yweather:location").item(0);
        city = locationNode.getAttributes()
                .getNamedItem("city")
                .getNodeValue()
                .toString();
        country = locationNode.getAttributes()
                .getNamedItem("country")
                .getNodeValue()
                .toString();

       Node windNode = srcDoc.getElementsByTagName("yweather:wind").item(0);
       windChill = windNode.getAttributes()
                .getNamedItem("chill")
                .getNodeValue()
                .toString();
       windChillDegree = windNode.getAttributes()
                .getNamedItem("speed")
                .getNodeValue()
                .toString();
    }

Step 5:- Now create the asynctask where you can call the function to fetch String response:-

class FetchXmlDocumentAsynctask extends AsyncTask<String, Void, String> 
     {
       private Exception exception;
       protected String doInBackground(String... urls)
        {
         String info= fetchYahooInformatiom();
          return  info;
        }

        protected void onPostExecute(String info) {
            Document weatherDoc = convertStringToDocument(info);
                    parseWeather(weatherDoc);
                    /*
                      Here you got values in variables "windSpeed","city","country","windChillDegree", 
                      now you can show them in textfields

                    */
        }
    }