DOM解析XML文件1-ArrayAdapter_simple_list_item_1布局

1.新建名为domxmls的Android Application Project

2.User.java

package com.example.domain;

public class User {

    private Integer id;
    private String name;

    public User() {
        super();
        // TODO Auto-generated constructor stub
    }

    public User(Integer id, String name) {
        super();
        this.id = id;
        this.name = name;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + "]";
    }

}

3.users.xml—-保存在assets文件夹中不会被编译

<?xml version="1.0" encoding="UTF-8"?>
<users>
    <user>
        <id>1</id>
        <name>chj</name>
    </user>
    <user>
        <id>2</id>
        <name>bc</name>
    </user>
    <user>
        <id>3</id>
        <name>wmm</name>
    </user>
    <user>
        <id>4</id>
        <name>yxh</name>
    </user>
    <user>
        <id>5</id>
        <name>hl</name>
    </user>
    <user>
        <id>1</id>
        <name>chj</name>
    </user>
    <user>
        <id>2</id>
        <name>bc</name>
    </user>
    <user>
        <id>3</id>
        <name>wmm</name>
    </user>
    <user>
        <id>4</id>
        <name>yxh</name>
    </user>
    <user>
        <id>5</id>
        <name>hl</name>
    </user>
    <user>
        <id>1</id>
        <name>chj</name>
    </user>
    <user>
        <id>2</id>
        <name>bc</name>
    </user>
    <user>
        <id>3</id>
        <name>wmm</name>
    </user>
    <user>
        <id>4</id>
        <name>yxh</name>
    </user>
    <user>
        <id>5</id>
        <name>hl</name>
    </user>
</users>

4.MainActivity.java
注意：这里采用的是ListView的simple_list_item_1布局

package com.example.domxml;

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

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.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

import com.example.domain.User;

public class MainActivity extends Activity {

    private List<User> users = new ArrayList<User>();

    //声明控件对象 视图V
    private ListView lv_users;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //获取控件对象
        lv_users=(ListView) findViewById(R.id.lv_users); //视图 jsp html


        try {
            // dom解析 users.xml asserts目录中
            domParser();
            //定义要显示的数组 Model
            String names[] = new String[users.size()];

            for(int i=0;i<users.size();i++){
                //用户名存储到names数组中
                names[i]=users.get(i).getName();
            }
            //适配器 控制层 C
            ListAdapter adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, names);
            //设置适配器
            lv_users.setAdapter(adapter);

        } catch (ParserConfigurationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /** * 解析方法 * * @throws ParserConfigurationException * @throws IOException * @throws SAXException */
    private void domParser() throws ParserConfigurationException, IOException,
            SAXException {
        // 1.创建DocumentBuilderFactory对象
        DocumentBuilderFactory builderFactory = DocumentBuilderFactory
                .newInstance();
        // 2.通过工厂对象获取DocumentBuilder
        DocumentBuilder builder = builderFactory.newDocumentBuilder();
        //
        // 3 获取要解析的xml文件 对应的输入流
        InputStream is = getAssets().open("users.xml");

        // 4.利用DocumentBuilder的parse方法获取解析的users.xml的document对象
        Document document = builder.parse(is);

        // 5.处理解析
        // 1.获取文档的跟节点 users
        Element root = document.getDocumentElement();
        // 2.获取当前根节点下面所有user节点的集合
        NodeList nodeList = root.getElementsByTagName("user");

        // 遍历孩子节点
        for (int i = 0; i < nodeList.getLength(); i++) {
            // 获取具体的孩子节点
            Node node = nodeList.item(i); // user
            // 创建user对象
            User user = new User();

            // 获取user节点的所有孩子节点 id name
            NodeList nlist = node.getChildNodes();

            // 遍历孩子节点
            for (int index = 0; index < nlist.getLength(); index++) {
                // 获取具体的孩子节点
                Node n = nlist.item(index);
                // 判断该节点的名称是否是id
                if (n.getNodeName().equals("id")) {
                    // 设置user的id值
                    user.setId(Integer.valueOf(n.getTextContent()));
                    // 判断该节点的名称是否是name
                } else if (n.getNodeName().equals("name")) {
                    // 设置name值
                    user.setName(n.getTextContent());
                }
            }
            // 添加到集合中
            users.add(user);

        }

    }

}

5.在activity_main.xml中添加ListView控件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="${relativePackage}.${activityClass}" >

    <ListView  android:id="@+id/lv_users" android:layout_width="match_parent" android:layout_height="match_parent" />

</RelativeLayout>

6.显示效果