Android Open Source - edu-video-client Youtube Url Async Task

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Back to project page edu-video-client.

License

The source code is released under:

Apache License

Java Source Code

package com.ngm.explaintome;
/*from ww w  .jav a2  s . c  om*/
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import android.os.AsyncTask;
import android.util.Log;

public class YoutubeUrlAsyncTask extends AsyncTask<String, Void, String> {

  public static interface VideoTaskListener {
    void onUrlRetrieved(final String url);
  }

  /**
   * {@value}
   */
  private static final String TAG = YoutubeUrlAsyncTask.class.getSimpleName();

  private final VideoTaskListener listener;

  public YoutubeUrlAsyncTask(final VideoTaskListener listener) {
    this.listener = listener;
  }

  @Override
  protected String doInBackground(String... params) {
    return getUrlVideoRTSP(params[0]);
  }

  @Override
  protected void onPostExecute(String result) {
    super.onPostExecute(result);
    listener.onUrlRetrieved(result);
  }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected void onProgressUpdate(Void... values) {
        super.onProgressUpdate(values);
    }

    public String getUrlVideoRTSP(String urlYoutube) {
    try {
      String gdy = "http://gdata.youtube.com/feeds/api/videos/";
      DocumentBuilder documentBuilder = DocumentBuilderFactory
          .newInstance().newDocumentBuilder();
      String id = extractYoutubeId(urlYoutube);
      URL url = new URL(gdy + id);
      HttpURLConnection connection = (HttpURLConnection) url
          .openConnection();
      Document doc = documentBuilder.parse(connection.getInputStream());
      Element el = doc.getDocumentElement();
      NodeList list = el.getElementsByTagName("media:content");// /media:content
      String cursor = urlYoutube;
      for (int i = 0; i < list.getLength(); i++) {
        Node node = list.item(i);
        if (node != null) {
          NamedNodeMap nodeMap = node.getAttributes();
          HashMap<String, String> maps = new HashMap<String, String>();
          for (int j = 0; j < nodeMap.getLength(); j++) {
            Attr att = (Attr) nodeMap.item(j);
            maps.put(att.getName(), att.getValue());
          }
          if (maps.containsKey("yt:format")) {
            String f = maps.get("yt:format");
            if (maps.containsKey("url")) {
              cursor = maps.get("url");
            }
            if (f.equals("1"))
              return cursor;
          }
        }
      }
      return cursor;
    } catch (Exception ex) {
      Log.e(TAG, ex.toString());
    }
    return urlYoutube;

  }

  private String extractYoutubeId(String url) {
    String id = null;
    String query;
    try {
      query = new URL(url).getQuery();
      if (query != null) {
        String[] param = query.split("&");
        for (String row : param) {
          String[] param1 = row.split("=");
          if (param1[0].equals("v")) {
            id = param1[1];
          }
        }
      } else {
        if (url.contains("embed")) {
          id = url.substring(url.lastIndexOf("/") + 1);
        }
      }
    } catch (MalformedURLException e) {
      Log.e(TAG, e.getMessage());
    }
    return id;
  }

}

Java Source Code List

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