How to quickly check if URL server is available

Question

I have a URL in the form

http://www.mywebsite.com/util/conv?a=1&from=%s&to=%s

And want to check if it is available.

The lin

Answer 1

if (android.os.Build.VERSION.SDK_INT > 9) {
                            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder()
                                    .permitAll().build();

                            StrictMode.setThreadPolicy(policy);
                        }
                        try {
                            URL diachi = new URL("http://example.com");
                            HttpURLConnection huc = (HttpURLConnection) diachi.openConnection();
                            huc.setRequestMethod("HEAD");
                            int responseCode = huc.getResponseCode();

                            if (responseCode != 404) {
                                //URL Exist

                            } else {
                                //URL not Exist
                            }
                        } catch (MalformedURLException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }