Question

Update:

String xmlList = null;
            // defaultHttpClient
            DefaultHttpClient httpClient = new DefaultHttpClient();
            try {

                HttpGet request = new HttpGet(URL);
                HttpResponse response = null;
                response = httpClient.execute(request);
                //HttpResponse httpResponse = httpClient.execute(request);
                HttpEntity httpEntity = response.getEntity();
                xmlList = EntityUtils.toString(httpEntity);

             } 
            catch (MalformedURLException e) {
                xmlList = "URL: is a malformed URL";
                e.printStackTrace();
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
                xmlList = "URL: UnsupportedEncodingException";
            } catch (ClientProtocolException e) {
                e.printStackTrace();
                xmlList = "URL: ClientProtocolException"; 
            } catch (SocketTimeoutException  e) {
                e.printStackTrace();
                xmlList = "URL: SocketTimeoutException";
            } catch (ConnectTimeoutException  e) {
                e.printStackTrace();
                xmlList = "URL: ConnectTimeoutException";
            } catch (IOException e) {
                xmlList = "URL: IOException";
                e.printStackTrace();
            } 
            finally {
                httpClient.getConnectionManager().shutdown();
            }  
            // return XML
            return xmlList; 

UPDATE END

i am building an app that reads data from website and i would like to know what are the exception should be check before execute the request?

the exceptions i am thinking of:

1) bad url
2) host not responding
3) time out
....
....

here is my code:

DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet request = new HttpGet(SongsManager1.URL);
HttpResponse response = null;
response = httpClient.execute(request);
//HttpResponse httpResponse = httpClient.execute(request);
HttpEntity httpEntity = response.getEntity();
xmlList = EntityUtils.toString(httpEntity);

Answer 1

You could do the following checks,

1. ClientProtocolException
2. IOException – This internally catches a lot of exceptions. You can check out the details in the android docs
3. URISyntaxException

You can do an network connectivity check before sending the request. Details are there in the link provided in zapl’s post.