Android pull解析xml的实现方法

Android pull解析xml的实现方法

资源文件：

persons.xml

<?xml version="1.0" encoding="utf-8" standalone="yes" ?>
<persons>
  <person id="101">
    <name>jame</name>
    <age>18</age>
  </person>
  <person id="102">
    <name>Tom</name>
    <age>20</age>
  </person>
  <person id="103">
    <name>Jack</name>
    <age>16</age>
  </person>
  <person id="104">
    <name>Rose</name>
    <age>26</age>
  </person>
</persons>

activity布局文件

activity_main.xml

<LinearLayout 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"
  android:orientation="vertical"
  tools:context="${relativePackage}.${activityClass}" > 

  <TextView
    android:id="@+id/tv_content"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/hello_world" /> 

  <Button
    android:id="@+id/bt_read"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="读取xml文件" /> 

</LinearLayout>

javaBean:

public class Person {
  private int id;
  private String name;
  private int age; 

  public Person() {
    super();
  } 

  public Person(int id, String name, int age) {
    super();
    this.id = id;
    this.name = name;
    this.age = age;
  } 

  public int getId() {
    return id;
  } 

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

  public String getName() {
    return name;
  } 

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

  public int getAge() {
    return age;
  } 

  public void setAge(int age) {
    this.age = age;
  } 

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

}

主activity:

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List; 

import org.xmlpull.v1.XmlPullParser; 

import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.util.Xml;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView; 

public class MainActivity extends Activity implements OnClickListener { 

  private TextView tv_content; 

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main); 

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

    findViewById(R.id.bt_read).setOnClickListener(this); 

  } 

  @Override
  public void onClick(View v) {
    try {
      if (Environment.getExternalStorageState().equals(
          Environment.MEDIA_MOUNTED)) { 

        List<Person> persons = new ArrayList<Person>();
        Person person = null; 

        File sd_file = Environment.getExternalStorageDirectory();
        File file = new File(sd_file, "persons.xml");
        InputStream inputStream = new FileInputStream(file);
        // 获取xml Pull解析器
        XmlPullParser pullParser = Xml.newPullParser();
        // 解析文件
        pullParser.setInput(inputStream, "utf-8");
        // 得到事件类型（START_DOCUMENT,END_DOCUMENT,START_TAG, END_TAG, TEXT,
        // etc）
        int eventType = pullParser.getEventType();
        while (eventType != XmlPullParser.END_DOCUMENT) {
          switch (eventType) {
          case XmlPullParser.START_TAG:
            // 获取标签的名称
            String tag_name = pullParser.getName();
            if ("person".equals(tag_name)) {
              person = new Person();
              persons.add(person); 

              // String value = pullParser.getAttributeValue(null,
              // "id");
              String value = pullParser.getAttributeValue(0);
              person.setId(Integer.parseInt(value));
            } else if ("name".equals(tag_name)) {
              // pullParser.next();
              // String text = pullParser.getText();
              String text = pullParser.nextText();
              person.setName(text); 

            } else if ("age".equals(tag_name)) {
              // pullParser.next();
              // String text = pullParser.getText();
              String text = pullParser.nextText();
              person.setAge(Integer.parseInt(text));
            }
            break; 

          default:
            break;
          }
          eventType = pullParser.next();
        }
        tv_content.setText(persons.toString());
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}

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