Estou tentando acessarBasecamp API do meu código-fonte Android / Java da seguinte maneira ....

import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;

import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;

public class BCActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        DefaultHttpClient httpClient = new DefaultHttpClient();

        //final String url = "https://encrypted.google.com/webhp?hl=en"; //This url works
        final String url = "https://username:[email protected]/people.xml"; //This don't
        HttpGet http = new HttpGet(url);
        http.addHeader("Accept", "application/xml");
        http.addHeader("Content-Type", "application/xml"); 

        try {

            //  HttpResponse response = httpClient.execute(httpPost);
            HttpResponse response = httpClient.execute(http);

            StatusLine statusLine = response.getStatusLine();
            System.out.println("statusLine : "+ statusLine.toString()); 

            ResponseHandler <String> res = new BasicResponseHandler();  

            String strResponse = httpClient.execute(http, res);
            System.out.println("________**_________________________\n"+strResponse);
            System.out.println("\n________**_________________________\n");

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

        WebView myWebView = (WebView) this.findViewById(R.id.webView);
        myWebView.loadUrl(url);//Here it works and displays XML response

    }
}

Este URL exibe a resposta emWebView, mas mostra exceção não autorizada quando tento acessar através deHttpClient como mostrado acima

Esta é a maneira correta de acessarBasecamp API através do Android / Java? ou Por favor, forneça-me a maneira correta de fazer isso.