xml解析

xml解析業務方法

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.獲取xml解析器
        XmlPullParser parser = Xml.newPullParser();
        //2. 獲取解析器要解析的內容
        parser.setInput(in, "utf-8");
        //3. 獲取解析的事件類型
        int type = parser.getEventType();
        //4. 不停的向下解析
        while (type != XmlPullParser.END_DOCUMENT) {
        //5.具體判斷解析的是開始節點,還是結束節點
            switch (type) {
                //解析開始節點
            case XmlPullParser.START_TAG:
            //6.具體判斷解析哪一個開始標籤   
                if ("channel".equals(parser.getName())) {
                //創建一個list集合
                    newsLists = new ArrayList<News>();
                } else if ("item".equals(parser.getName())) {
                //對象
                    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://解析結束標籤

                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);
        // 準備listview要顯示的數據,去服務器獲取數據進行封裝
        initListData();

    }

    // 準備listview的數據
    private void initListData() {
        // 不管什麼版本手機只要做耗時的操作(比如連接網絡/拷貝大數據.....)就要開一個子線程.
        new Thread() {
            public void run() {
                try {
                    // 去服務器取數據:url地址
                    String path = "http://www.caijing.com.cn/rss/index.xml";
                    // 創建url對象,指定我們要方訪問的網址
                    URL url = new URL(path);
                    // 拿到httpurlconnection對象,用於發送或者接收數據
                    HttpURLConnection connection = (HttpURLConnection) url
                            .openConnection();
                    // 設置發送get請求
                    connection.setRequestMethod("GET");
                    // 設置請求超時時間
                    connection.setConnectTimeout(5000);
                    // 獲取服務器返回 的狀態碼
                    int code = connection.getResponseCode();
                    // 200 說明請求成功
                    if (code == 200) {
                        // 獲取服務器返回的數據,是以流的形式返回的,由於把流轉換成字符串是非常常見的操作,所以提出一個工具類
                        InputStream in = connection.getInputStream();
                        // 解析xml抽出一個業務方法
                        newsLists = XmlParserUtils.parserXml(in);
                        // 在子線程中要用runOnUiThread方法
                        runOnUiThread(new Runnable() {
                            public void run() {
                        // 更新ＵＩ把數據展示到listview上
                lv.setAdapter(new MyAdapter());
                            }
                        });

                    }

                } catch (Exception e) {
                    e.printStackTrace();
                }
            };
        }.start();

    }

    // 定義數據適配器
    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. 找到控件顯示集合裏面數據
            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顯示圖片數據:用Github開源項目的SmartImageView加載圖片代碼更簡單.在佈局文件中用(SmartImageView的路徑名)<com.jit.lib.SmartImageView/>代替<ImageView/>
            String imageUrl = newsLists.get(position).getImage();
            iv_icon.setImageUrl(imageUrl);
// 2.顯示數據
            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 + "國內新聞");
                break;
            case 2:
                tv_type.setText("跟帖");
                break;
            case 3:
                tv_type.setText("國外新聞");
                break;

            default:
                break;
            }
            return view;
        }

    }

}