Question

我想直接在我自己的目录中从Webserver下载XML文件。

我在内部存储中创建新文件夹的代码是

File mydir = context.getDir("LENOX",Context.MODE_PRIVATE);

File fileWithinDir = new File(mydir,"LENOX.xml");

我的下载XML文件类：

public class XMLParser {
ConnectionDetector cd = new ConnectionDetector(ListViewActivity.getAppContext());




public String getXMLFromUrl(String url) {
    String xml = null;

    if (cd.isConnectingToInternet()) {
        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();
        }
    } else {
        return null;
    }

    return xml;
    //return xml
}

public Document getDomElement(String xml) {

    Document doc = null;
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    try {
        DocumentBuilder db = dbf.newDocumentBuilder();

        InputSource is = new InputSource();
        is.setCharacterStream(new StringReader(xml));

        doc = db.parse(new ByteArrayInputStream(xml.getBytes()));
    } catch (ParserConfigurationException e) {
        Log.e("Error Parser: ", e.getMessage());
        return null;
    } catch (SAXException e) {
        Log.e("Error SAX: ", e.getMessage());
        return null;
    } catch (IOException e) {
        Log.e("Error IO: ", e.getMessage());
        return null;
    }
    return doc;
}

public String getValue(Element item, String str) {
    NodeList n = item.getElementsByTagName(str);
    return this.getElementValue(n.item(0));
}

public final String getElementValue(Node elem) {
    Node child;
    if (elem != null) {
        if (elem.hasChildNodes()) {
            for (child = elem.getFirstChild(); child != null; child = child.getNextSibling()) {
                if (child.getNodeType() == Node.TEXT_NODE) {
                    return child.getNodeValue();
                }
            }
        }
    }
    return "";
}

来自here

代码片段...也许它有助于理解

XMLParser parser = new XMLParser();
            String xml = parser.getXMLFromUrl("http://testsite.de/XXX.xml");

是否有任何代码片段用于在我自己的目录中从下载的xml文件创建文件？

Answer 1

如果要在文件中编写String，可以使用以下方法：

 public static void writeStringToFile(String content, File file)throws IOException {
        FileWriter writer = new FileWriter(file);
        writer.write(content);
        writer.flush();
        writer.close();
    }

然而，我重新命令你使用android SharedPreferences。这是最实际的。

public static void writeStringToPreference(Context context,String tag,String    value)
  {
     SharedPreferences sharedP = context.getSharedPreferences(nameSpace, O);
     Editor editor=sharedP.edit();
     editor.putString(tag,value)
     editor.commit();
  }

public static String readStringToPreference(Context context,String tag)  {
  SharedPreferences sharedP = context.getSharedPreferences(nameSpace, O);
  return sharedP.getString(tag);
 }

下载XML文件并将其存储在内部存储中

1 个答案: