Textview Text wird nicht geändert

1@Override
2 public void onClick(View v)
3 {
4 tv.setText("Webseite wird geladen");
5 String url = "http://ptb.ceegee-page.de/navigator1.html";
6 String result = "";
7 DefaultHttpClient client = new DefaultHttpClient();
8 HttpGet method = new HttpGet(url);
9 HttpResponse res = null;
10 try
11 {
12 res = client.execute(method);
13 }
14 catch (ClientProtocolException e1)
15 {
16 // TODO Auto-generated catch block
17 Log.e("log_tag", "Error converting result "+e1.toString());
18 }
19 catch (IOException e1)
20 {
21 // TODO Auto-generated catch block
22 tv.setText("Webseite nicht erreichbar (Keine Netzwerkverbindung)");
23 Log.e("log_tag", "Error converting result "+e1.toString());
24 }
25
26 try
27 {
28 InputStream is = res.getEntity().getContent();
29 BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"));
30 StringBuilder sb = new StringBuilder();
31 String line = null;
32 while ((line = reader.readLine()) != null)
33 {
34 sb.append(line + "\n");
35 }
36 result = sb.toString();
37 is.close();
38 tv.setText("Webseite geladen");
39 }
40 catch(Exception e)
41 {
42 Log.e("log_tag", "Error converting result "+e.toString());
43 }
44 }