android之xml解析

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简单介绍一下我在用DOM解析方法时遇到的问题:

获取节点的属性时,老是出错误,后面经过多方查找
终于解决,方法如下:
data[i] = nChild.getAttributes().getNamedItem("data").getNodeValue();
其中"data"为属性的名字.


源代码如下:

public class test extends Activity implements OnClickListener {

    File fl;

    private final String net = "http://www.google.com/ig/api?hl=zh-cn&weather=";

    private final String st = "beijing";

    private String addr;

    private String str;

    ListView lv;

    ArrayAdapter<String> adapter;

    private EditText et;

    private TextView tv;

    private TextView tv1;

 

 

    @Override

    public void onCreate(Bundle savedInstanceState) {

       super.onCreate(savedInstanceState);

       setContentView(R.layout.main);

 

       Button bt = (Button) findViewById(R.id.bt);

       bt.setOnClickListener(this);

       et = (EditText) findViewById(R.id.et);

 

    }

    @Override

    public void onClick(View agr0) {

       // TODO Auto-generated method stub

       addr = et.getText().toString();

       switch (agr0.getId()) {

       case R.id.bt:

           if (!addr.trim().equals("")) {  //获取输入的内容,取出空格

              addr = net + addr;

              String[] data = null;

              //Node nRoot = root(addr,"weather").item(0);         //将weather设置为根节点

              Node nRoot = root(addr,"forecast_information").item(0);

              NodeList child = nRoot.getChildNodes();            //获得孩子结点

             

              int childSize = child.getLength();                 //获得子节点的个数  6

                 

              data = new String[childSize];

              for (int i = 0; i < childSize; i++) {

                  Node nChild = child.item(i);                 //第一个子节点,city

                      if (nChild.hasAttributes()) {          //获得子节点

//获得节点属性

data[i] = nChild.getAttributes().getNamedItem("data").getNodeValue();

                        

                     }

                    

                     tv = (TextView) findViewById(R.id.tv);

                     tv.setText("city : "  + data[1]);

             

                     tv1 = (TextView) findViewById(R.id.tv2);

                     tv1.setText("date :" + data[4]);

                   }

               }

               setTitle(et.getText().toString());  //显示查询的城市

           break;

       }

       }

    //}

 

    private NodeList root(final String url ,  final String str){

       NodeList root = null;

       try{

       InputSource is=new InputSource(new InputStreamReader(new URL(url).openStream()));

       DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

           DocumentBuilder dom = factory.newDocumentBuilder();

           Document doc = dom.parse(is);

           root = doc.getElementsByTagName(str);

          

          

       }catch (Exception e){

           e.printStackTrace();

       }

       return root;

    }

}