Apps Trying to download webpage source, code requires a minimal SDK version 3 but other existing function

[RedTie]

I'm trying to download a web page source within android using Java, but else where in my program the minimum requirement for SDK within the Android manifest needs to be set at 11 but the below code (to download source) will only work when minimum SDK version is set to 3.

Is there any changes you would suggest I make to the below code

 public void getHtml() throws ClientProtocolException, IOException
    {
        HttpClient httpClient = new DefaultHttpClient();
        HttpContext localContext = new BasicHttpContext();
        HttpGet httpGet = new HttpGet("WebSiteLink");
        HttpResponse response = httpClient.execute(httpGet, localContext);
        String result = "";
    
        BufferedReader reader = new BufferedReader(
            new InputStreamReader(
              response.getEntity().getContent()
            )
          );
    
        String line = null;
        while ((line = reader.readLine()) != null){
          result += line + "\n";
          Toast.makeText(activity.this, line.toString(), Toast.LENGTH_LONG).show();
    
        }
    
    }

Code above requires minmium SDK version 3

Rest of code requires minimum SDK version 11


When I change minimum SDK in android manifest to 11 above code won't work

(By won't work, I mean I get the error "Unfortunately Test has stopped" and then the app closes)