How to Call a RESTful Web Service from an Android Application Using the Jersey Framework?

String url = "http://yourapi.com/user";

// Creating a new AsyncTask to handle network operations
private class CallRestService extends AsyncTask<Void, Void, String> {
    @Override
    protected String doInBackground(Void... voids) {
        try {
            // Create HTTP client and request
            HttpClient httpclient = new DefaultHttpClient();
            HttpPut httpPut = new HttpPut(url);

            // Set authentication header
            String auth = "username:password";
            byte[] encodedAuth = Base64.encode(auth.getBytes(), Base64.NO_WRAP);
            String authHeader = "Basic " + new String(encodedAuth);
            httpPut.setHeader("Authorization", authHeader);

            // Execute the request
            HttpResponse response = httpclient.execute(httpPut);
            // Process response
            return EntityUtils.toString(response.getEntity());

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
}

// Example code to call RESTful service
// Ensure to run this in an AsyncTask or separate thread to avoid network on main thread exception
String url = "http://yourapi.com/user";
HttpClient httpclient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);

// Adding Basic Authentication
String username = "your_username";
String password = "your_password";
String auth = username + ":" + password;
String encodedAuth = Base64.encodeToString(auth.getBytes(), Base64.NO_WRAP);
httpGet.setHeader("Authorization", "Basic " + encodedAuth);

// Execute the request
HttpResponse response = httpclient.execute(httpGet);
String responseString = EntityUtils.toString(response.getEntity());
System.out.println(responseString);