Android Out of Memory, How to Optimize

stringfetch.java

StringBuilder response  = new StringBuilder();
String jsonString;
        URL url;
        HttpURLConnection httpconn;
        
		try {
			url = new URL("http://backend-newsinamap.appspot.com");
			httpconn = (HttpURLConnection) url.openConnection();
			if (httpconn.getResponseCode() == HttpURLConnection.HTTP_OK)
			{
			    BufferedReader input = new BufferedReader(new InputStreamReader(httpconn.getInputStream()),8192);
			    String strLine = null;
			    while ((strLine = input.readLine()) != null)
			    {
			        response.append(strLine);
			    }
			    input.close();
			    jsonString = response.toString();
			}
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}