Android 使用Vitamio打造自己的万能播放器（9）—— 在线播放 (在线电视)

package com.nmbb.oplayer.ui.helper;

import java.io.IOException;
import java.util.ArrayList;

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

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 org.xml.sax.SAXException;

import android.content.Context;

import com.nmbb.oplayer.po.OnlineVideo;

/** 从XML读取电视台节目 */
public class XmlReaderHelper {

  /** 获取所有电视分类 */
  public static ArrayList<OnlineVideo> getAllCategory(final Context context) {
    ArrayList<OnlineVideo> result = new ArrayList<OnlineVideo>();
    DocumentBuilderFactory docBuilderFactory = null;
    DocumentBuilder docBuilder = null;
    Document doc = null;
    try {
      docBuilderFactory = DocumentBuilderFactory.newInstance();
      docBuilder = docBuilderFactory.newDocumentBuilder();
      // xml file 放到 assets目录中的
      doc = docBuilder.parse(context.getResources().getAssets()
          .open("online.xml"));
      // root element
      Element root = doc.getDocumentElement();
      NodeList nodeList = root.getElementsByTagName("category");
      for (int i = 0; i < nodeList.getLength(); i++) {
        Node node = nodeList.item(i);// category
        OnlineVideo ov = new OnlineVideo();
        NamedNodeMap attr = node.getAttributes();
        ov.title = attr.getNamedItem("name").getNodeValue();
        ov.id = attr.getNamedItem("id").getNodeValue();
        ov.category = 1;
        ov.level = 2;
        ov.is_category = true;
        result.add(ov);
        // Read Node
      }
    } catch (IOException e) {
    } catch (SAXException e) {
    } catch (ParserConfigurationException e) {
    } finally {
      doc = null;
      docBuilder = null;
      docBuilderFactory = null;
    }
    return result;
  }

  /** 读取分类下所有电视地址 */
  public static ArrayList<OnlineVideo> getVideos(final Context context,
      String categoryId) {
    ArrayList<OnlineVideo> result = new ArrayList<OnlineVideo>();
    DocumentBuilderFactory docBuilderFactory = null;
    DocumentBuilder docBuilder = null;
    Document doc = null;
    try {
      docBuilderFactory = DocumentBuilderFactory.newInstance();
      docBuilder = docBuilderFactory.newDocumentBuilder();
      // xml file 放到 assets目录中的
      doc = docBuilder.parse(context.getResources().getAssets()
          .open("online.xml"));
      // root element
      Element root = doc.getElementById(categoryId);
      if (root != null) {
        NodeList nodeList = root.getChildNodes();
        for (int i = 0, j = nodeList.getLength(); i < j; i++) {
          Node baseNode = nodeList.item(i);

          if (!"item".equals(baseNode.getNodeName()))
            continue;
          String id = baseNode.getFirstChild().getNodeValue();
          if (id == null)
            continue;
          OnlineVideo ov = new OnlineVideo();
          ov.id = id;

          Element el = doc.getElementById(ov.id);
          if (el != null) {
            ov.title = el.getAttribute("title");
            ov.icon_url = el.getAttribute("image");
            ov.level = 3;
            ov.category = 1;
            NodeList nodes = el.getChildNodes();
            for (int m = 0, n = nodes.getLength(); m < n; m++) {
              Node node = nodes.item(m);
              if (!"ref".equals(node.getNodeName()))
                continue;
              String href = node.getAttributes()
                  .getNamedItem("href").getNodeValue();
              if (ov.url == null) {
                ov.url = href;
              } else {
                if (ov.backup_url == null)
                  ov.backup_url = new ArrayList<String>();
                ov.backup_url.add(href);
              }
            }
            if (ov.url != null)
              result.add(ov);
          }
        }
      }
    } catch (IOException e) {
      e.printStackTrace();
    } catch (SAXException e) {
      e.printStackTrace();
    } catch (ParserConfigurationException e) {
      e.printStackTrace();
    } finally {
      doc = null;
      docBuilder = null;
      docBuilderFactory = null;
    }
    return result;
  }
}