xml解析

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xml解析业务方法

这里写图片描述

javabean

public class News {    private String title;    private String description;    private String image;    private String type;    private String comment;    public String getTitle() {        return title;    }    public void setTitle(String title) {        this.title = title;    }    public String getDescription() {        return description;    }    public void setDescription(String description) {        this.description = description;    }    public String getImage() {        return image;    }    public void setImage(String image) {        this.image = image;    }    public String getType() {        return type;    }    public void setType(String type) {        this.type = type;    }    public String getComment() {        return comment;    }    public void setComment(String comment) {        this.comment = comment;    }}

XmlParserUtils.java

public class XmlParserUtils {    public static List<News> parserXml(InputStream in) throws Exception {        List<News> newsLists = null;        News news = null;        // 1.获取xml解析器        XmlPullParser parser = Xml.newPullParser();        //2. 获取解析器要解析的内容        parser.setInput(in, "utf-8");        //3. 获取解析的事件类型        int type = parser.getEventType();        //4. 不停的向下解析        while (type != XmlPullParser.END_DOCUMENT) {        //5.具体判断解析的是开始节点,还是结束节点            switch (type) {                //解析开始节点            case XmlPullParser.START_TAG:            //6.具体判断解析哪一个开始标签                   if ("channel".equals(parser.getName())) {                //创建一个list集合                    newsLists = new ArrayList<News>();                } else if ("item".equals(parser.getName())) {                //对象                    news = new News();                } else if ("title".equals(parser.getName())) {                    news.setTitle(parser.nextText());                } else if ("description".equals(parser.getName())) {                    news.setDescription(parser.nextText());                }else if ("image".equals(parser.getName())) {                    news.setIamge(parser.nextText());                }else if ("type".equals(parser.getName())) {                    news.setType(parser.nextText());                }else if ("comment".equals(parser.getName())) {                    news.setComment(parser.nextText());                }                break;            case XmlPullParser.END_TAG://解析结束标签                if ("item".equals(parser.getName())) {                    // 把javabean添加到集合                    newsLists.add(news);                }                break;            }            // 不停向下解析            type = parser.next();        }        return newsLists;    }}

MainActivity

public class MainActivity extends Activity {    private List<News> newsLists;    ListView lv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        // 找到控件        lv = (ListView) findViewById(R.id.lv);        // 准备listview要显示的数据,去服务器获取数据进行封装        initListData();    }    // 准备listview的数据    private void initListData() {        // 不管什么版本手机只要做耗时的操作(比如连接网络/拷贝大数据.....)就要开一个子线程.        new Thread() {            public void run() {                try {                    // 去服务器取数据:url地址                    String path = "http://www.caijing.com.cn/rss/index.xml";                    // 创建url对象,指定我们要方访问的网址                    URL url = new URL(path);                    // 拿到httpurlconnection对象,用于发送或者接收数据                    HttpURLConnection connection = (HttpURLConnection) url                            .openConnection();                    // 设置发送get请求                    connection.setRequestMethod("GET");                    // 设置请求超时时间                    connection.setConnectTimeout(5000);                    // 获取服务器返回 的状态码                    int code = connection.getResponseCode();                    // 200 说明请求成功                    if (code == 200) {                        // 获取服务器返回的数据,是以流的形式返回的,由于把流转换成字符串是非常常见的操作,所以提出一个工具类                        InputStream in = connection.getInputStream();                        // 解析xml抽出一个业务方法                        newsLists = XmlParserUtils.parserXml(in);                        // 在子线程中要用runOnUiThread方法                        runOnUiThread(new Runnable() {                            public void run() {                        // 更新ＵＩ把数据展示到listview上                lv.setAdapter(new MyAdapter());                            }                        });                    }                } catch (Exception e) {                    e.printStackTrace();                }            };        }.start();    }    // 定义数据适配器    private class MyAdapter extends BaseAdapter {        @Override        public int getCount() {            return newsLists.size();        }        @Override        public Object getItem(int position) {            return null;        }        @Override        public long getItemId(int position) {            return 0;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            View view;            if (convertView == null) {                view = View.inflate(getApplicationContext(), R.layout.item,                        null);            } else {                view = convertView;            }            // 1. 找到控件显示集合里面数据            SmartImageView iv_icon = (SmartImageView) view                    .findViewById(R.id.iv_icon);            TextView tv_title = (TextView) view.findViewById(R.id.tv_title);            TextView tv_desc = (TextView) view.findViewById(R.id.tv_desc);            TextView tv_type = (TextView) view.findViewById(R.id.tv_type);// 1.1显示图片数据:用Github开源项目的SmartImageView加载图片代码更简单.在布局文件中用(SmartImageView的路径名)<com.jit.lib.SmartImageView/>代替<ImageView/>            String imageUrl = newsLists.get(position).getImage();            iv_icon.setImageUrl(imageUrl);// 2.显示数据            tv_title.setText(newsLists.get(position).getTitle());            tv_desc.setText(newsLists.get(position).getDescription());            String typee = newsLists.get(position).getType();            String comment = newsLists.get(position).getComment();            int type = Integer.parseInt(typee);            switch (type) {            case 1:                tv_type.setText(comment + "国内新闻");                break;            case 2:                tv_type.setText("跟帖");                break;            case 3:                tv_type.setText("国外新闻");                break;            default:                break;            }            return view;        }    }}

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