Speichern von XML aus Url und Lesen Sie es

Mache ich android App und brauche ich zum herunterladen eines xml Datei von einer URL und öffnen Sie Sie,
Wie kann ich das machen?

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    File dir1 = getDir("xmls",Context.MODE_PRIVATE);//Creating an internal dir;
    System.out.println("dir1: " + dir1);

    //Saving The File
    try {
       URL url = new URL("http://www. the url of my xml .xml");
       //The server thinks this request is from an Opera browser!
       String userAgent = "Opera/9.63 (Windows NT 5.1; U; en) Presto/2.1.1";
       System.out.println("Downloading ...");
       downloadFromUrl(url, dir1+"news.xml", userAgent);
       System.out.println("OK");
} catch (Exception e) {
        System.err.println(e);
        System.out.println("Entri pure nel catch");
    }
    //This is the path of the xml file that i have saved
    URL = dir1+"/news.xml" ; 
    ArrayList<HashMap<String, String>> songsList = 
                                       new ArrayList<HashMap<String, String>>();
    XMLParser parser = new XMLParser();
    String xml = parser.getXmlFromUrl(URL); //getting XML from UR
    Document doc = parser.getDomElement(xml); //getting DOM element
    //And then i do all the parsing
    NodeList nl = doc.getElementsByTagName(KEY_CATEGORIA);

Und die XMlParser Klasse ist wie folgt:

public class XMLParser_Categorie {

//constructor
public XMLParser_Categorie() {

}

/**
 * Getting XML from URL making HTTP request
 * @param url string
 * */
public String getXmlFromUrl(String url) {
    String xml = null;

    try {
        //defaultHttpClient
        DefaultHttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(url);

        HttpResponse httpResponse = httpClient.execute(httpPost);
        HttpEntity httpEntity = httpResponse.getEntity();
        xml = EntityUtils.toString(httpEntity);

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    } catch (ClientProtocolException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
    //return XML
    return xml;
}

Ich ändern müssen Sie diese Anweisung:

 DefaultHttpClient httpClient = new DefaultHttpClient();
 HttpPost httpPost = new HttpPost(url);
 HttpResponse httpResponse = httpClient.execute(httpPost);
 HttpEntity httpEntity = httpResponse.getEntity();
 xml = EntityUtils.toString(httpEntity);

Es eine Anfrage von einem lokalen Verzeichnis und nicht eine http-Anforderung.

InformationsquelleAutor JdO | 2013-05-02

Hier ist ein code-snippet für Euch ,

  try {

        URL url = new URL("your url goes here");

        //create the new connection
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

        urlConnection.connect();

        //set the path where we want to save the file
        //in this case, going to save it on the root directory of the
        //sd card.
        File SDCardRoot = Environment.getExternalStorageDirectory();
        //create a new file, specifying the path, and the filename
        //which we want to save the file as.
        File file = new File(SDCardRoot,"Demo.xml");

        //this will be used to write the downloaded data into the file we created
        FileOutputStream fileOutput = new FileOutputStream(file);

        //this will be used in reading the data from the internet
        InputStream inputStream = urlConnection.getInputStream();

        //this is the total size of the file
        int totalSize = urlConnection.getContentLength();
        progressDialog.setMax(totalSize);

        //variable to store total downloaded bytes
        int downloadedSize = 0;

        //create a buffer...
        byte[] buffer = new byte[1024];
        int bufferLength = 0; //used to store a temporary size of the buffer

        //now, read through the input buffer and write the contents to the file
        while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
                //add the data in the buffer to the file in the file output stream (the file on the sd card
                fileOutput.write(buffer, 0, bufferLength);
                //add up the size so we know how much is downloaded
                downloadedSize += bufferLength;

        }
        //close the output stream when done
        fileOutput.close();
        //catch some possible errors...
} catch (MalformedURLException e) {
        e.printStackTrace();
} catch (IOException e) {
        e.printStackTrace();
}