android 中解析XML的方法(转)

在XML解析和使用原始XML资源中都涉及过对XML的解析，之前使用的是 DOM4J和 XmlResourceParser 来解析的。本文中将使用XmlPullParser来解析，分别解析不同复杂度的test1.xml、test2.xml、test3.xml。代码如下：

MainActivity：

package com.home.xmlparsetest;

import java.io.IOException;
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.util.Xml;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ExpandableListView;

public class MainActivity extends Activity implements OnClickListener {
  private Button parseBtn1;
  private Button parseBtn2;
  private Button parseBtn3;
  private ExpandableListView listView;

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

  private void initWidget() {
    parseBtn1 = (Button) findViewById(R.id.main_btn_test1);
    parseBtn1.setOnClickListener(this);
    parseBtn2 = (Button) findViewById(R.id.main_btn_test2);
    parseBtn2.setOnClickListener(this);
    parseBtn3 = (Button) findViewById(R.id.main_btn_test3);
    parseBtn3.setOnClickListener(this);
    listView = (ExpandableListView) findViewById(R.id.list);
  }

  @Override
  public void onClick(View v) {
    if (v == parseBtn1) {
      InputStream is = getAssetsStream("test1.xml");
      List<ClassBean> list = parseFile1(is);
      listView.setAdapter(new MyAdapter(this, list));
    } else if (v == parseBtn2) {
      InputStream is = getAssetsStream("test2.xml");
      List<ClassBean> list = parseFile2(is);
      listView.setAdapter(new MyAdapter(this, list));
    } else if (v == parseBtn3) {
      InputStream is = getAssetsStream("test3.xml");
      List<ClassBean> list = parseFile3(is);
      listView.setAdapter(new MyAdapter(this, list));
    }
  }

  /**
   * 得到Assets里面相应的文件流
   * 
   * @param fileName
   * @return
   */
  private InputStream getAssetsStream(String fileName) {
    InputStream is = null;
    try {
      is = getAssets().open(fileName);
    } catch (IOException e) {
      e.printStackTrace();
    }
    return is;
  }

  /**
   * 解析test1.xml
   * 
   * @param is
   * @return list
   */
  private List<ClassBean> parseFile1(InputStream is) {
    List<ClassBean> list = new ArrayList<ClassBean>();
    try {
      XmlPullParser parser = Xml.newPullParser();
      parser.setInput(is, "utf-8");
      int event = parser.getEventType();
      while (event != XmlPullParser.END_DOCUMENT) {
        switch (event) {
        case XmlPullParser.START_DOCUMENT:
          break;
        case XmlPullParser.START_TAG:
          if ("class".equals(parser.getName())) {
            ClassBean bean = new ClassBean();
            bean.setId(parser.getAttributeValue(0));
            bean.setName(parser.nextText());
            list.add(bean);
          }
          break;
        }
        event = parser.next();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
    return list;
  }

  /**
   * 解析test2.xml
   * 
   * @param is
   * @return list
   */
  private List<ClassBean> parseFile2(InputStream is) {
    List<ClassBean> list = null;
    ClassBean bean = null;
    List<StudentBean> sList = null;
    StudentBean be = null;
    try {
      XmlPullParser parser = Xml.newPullParser();
      parser.setInput(is, "utf-8");
      int event = parser.getEventType();
      while (event != XmlPullParser.END_DOCUMENT) {
        switch (event) {
        case XmlPullParser.START_DOCUMENT:
          list = new ArrayList<ClassBean>();
          break;
        case XmlPullParser.START_TAG:
          if ("class".equals(parser.getName())) {
            bean = new ClassBean();
            bean.setId(parser.getAttributeValue(0));
            bean.setName(parser.getAttributeValue(1));
            sList = new ArrayList<StudentBean>();
          } else if ("student".equals(parser.getName())) {
            be = new StudentBean();
            be.setId(parser.getAttributeValue(0));
            be.setName(parser.nextText());
            sList.add(be);
          }
          break;
        case XmlPullParser.END_TAG:
          if ("class".equals(parser.getName())) {
            bean.setList(sList);
            list.add(bean);
            bean = null;
          }
          break;
        }
        event = parser.next();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
    return list;
  }

  /**
   * 解析test3.xml
   * 
   * @param is
   * @return list
   */
  private List<ClassBean> parseFile3(InputStream is) {
    List<ClassBean> list = null;
    ClassBean bean = null;
    List<StudentBean> sList = null;
    StudentBean be = null;
    try {
      XmlPullParser parser = Xml.newPullParser();
      parser.setInput(is, "utf-8");
      int event = parser.getEventType();
      while (event != XmlPullParser.END_DOCUMENT) {
        switch (event) {
        case XmlPullParser.START_DOCUMENT:
          list = new ArrayList<ClassBean>();
          break;
        case XmlPullParser.START_TAG:
          if ("class".equals(parser.getName())) {
            bean = new ClassBean();
            bean.setId(parser.getAttributeValue(0));
            bean.setName(parser.getAttributeValue(1));
            sList = new ArrayList<StudentBean>();
          } else if ("student".equals(parser.getName())) {
            be = new StudentBean();
            be.setId(parser.getAttributeValue(0));
            sList.add(be);
          } else if ("name".equals(parser.getName())) {
            be.setName(parser.nextText());
          } else if ("sex".equals(parser.getName())) {
            be.setSex(parser.nextText());
          }
          break;
        case XmlPullParser.END_TAG:
          if ("class".equals(parser.getName())) {
            bean.setList(sList);
            list.add(bean);
            bean = null;
          }
          break;
        }
        event = parser.next();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
    return list;
  }
}

MyAdapter：

package com.home.xmlparsetest;

import java.util.List;
import android.content.Context;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MyAdapter extends BaseExpandableListAdapter {
  private List<ClassBean> classList;
  private Context context;

  public MyAdapter(Context context, List<ClassBean> classList) {
    this.context = context;
    this.classList = classList;
  }

  @Override
  public Object getChild(int groupPosition, int childPosition) {
    List<StudentBean> sList = classList.get(groupPosition).getList();
    StudentBean be = null;
    if (sList != null) {
      be = sList.get(childPosition);
    }
    return be;
  }

  @Override
  public long getChildId(int groupPosition, int childPosition) {
    return childPosition;
  }

  @Override
  public View getChildView(int groupPosition, int childPosition,
      boolean isLastChild, View convertView, ViewGroup parent) {
    LinearLayout ll = new LinearLayout(context);
    ll.setOrientation(LinearLayout.HORIZONTAL);
    List<StudentBean> sList = classList.get(groupPosition).getList();

    if (sList != null && sList.size() > 0
        && sList.get(childPosition).getId() != null) {
      TextView tv1 = getTextView2();
      tv1.setText(sList.get(childPosition).getId());
      ll.addView(tv1);
    }

    if (sList != null && sList.size() > 0
        && sList.get(childPosition).getName() != null) {
      TextView tv2 = getTextView2();
      tv2.setText(sList.get(childPosition).getName());
      ll.addView(tv2);
    }

    if (sList != null && sList.size() > 0
        && sList.get(childPosition).getSex() != null) {
      TextView tv3 = getTextView2();
      tv3.setText(sList.get(childPosition).getSex());
      ll.addView(tv3);
    }
    return ll;
  }

  @Override
  public int getChildrenCount(int groupPosition) {
    int size = 0;
    List<StudentBean> sList = classList.get(groupPosition).getList();
    if (sList != null) {
      size = sList.size();
    }
    return size;
  }

  @Override
  public Object getGroup(int groupPosition) {
    return classList.get(groupPosition);
  }

  @Override
  public int getGroupCount() {
    return classList.size();
  }

  @Override
  public long getGroupId(int groupPosition) {
    return groupPosition;
  }

  @Override
  public View getGroupView(int groupPosition, boolean isExpanded,
      View convertView, ViewGroup parent) {
    LinearLayout ll = new LinearLayout(context);
    ll.setOrientation(LinearLayout.HORIZONTAL);
    TextView tv1 = getTextView1();
    tv1.setText(classList.get(groupPosition).getId());
    ll.addView(tv1);

    TextView tv2 = getTextView1();
    tv2.setText(classList.get(groupPosition).getName());
    ll.addView(tv2);
    return ll;
  }

  @Override
  public boolean hasStableIds() {
    return true;
  }

  @Override
  public boolean isChildSelectable(int groupPosition, int childPosition) {
    return true;
  }

  private TextView getTextView1() {
    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
        ViewGroup.LayoutParams.WRAP_CONTENT,
        ViewGroup.LayoutParams.WRAP_CONTENT);
    lp.setMargins(0, 0, 20, 0);
    TextView tv = new TextView(context);
    tv.setLayoutParams(lp);
    tv.setGravity(Gravity.CENTER_VERTICAL);
    tv.setPadding(36, 0, 0, 0);
    tv.setTextSize(25);
    return tv;
  }

  private TextView getTextView2() {
    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
        ViewGroup.LayoutParams.WRAP_CONTENT,
        ViewGroup.LayoutParams.WRAP_CONTENT);
    lp.setMargins(20, 0, 50, 0);
    TextView tv = new TextView(context);
    tv.setLayoutParams(lp);
    tv.setGravity(Gravity.CENTER_VERTICAL);
    tv.setPadding(36, 0, 0, 0);
    tv.setTextSize(18);
    return tv;
  }
}

ClassBean实体类：

package com.home.xmlparsetest;

import java.util.List;

public class ClassBean {
  private String id;
  private String name;
  private List<StudentBean> list;

  public String getId() {
    return id;
  }

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

  public String getName() {
    return name;
  }

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

  public List<StudentBean> getList() {
    return list;
  }

  public void setList(List<StudentBean> list) {
    this.list = list;
  }

}

StudentBean：

package com.home.xmlparsetest;

public class StudentBean {
  private String id;
  private String name;
  private String sex;

  public String getId() {
    return id;
  }

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

  public String getName() {
    return name;
  }

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

  public String getSex() {
    return sex;
  }

  public void setSex(String sex) {
    this.sex = sex;
  }

}

布局文件main.xml：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/main_btn_test1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="解析test1" />

        <Button
            android:id="@+id/main_btn_test2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="解析test2" />

        <Button
            android:id="@+id/main_btn_test3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="解析test3" />
    </LinearLayout>

    <ExpandableListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >
    </ExpandableListView>

</LinearLayout>

assets里面的test1.xml：

<?xml version="1.0" encoding="utf-8"?>
<classList>

    <class id="1">一班</class>

    <class id="2">二班</class>

    <class id="3">三班</class>

    <class id="4">四班</class>

</classList>

assets里面的test2.xml：

<?xml version="1.0" encoding="utf-8"?>
<classList>

    <class id="1" name="一班" >
        <student id="1" >张三       </student>
        <student id="2" >李四      </student>
    </class>

    <class id="2" name="二班" >
        <student id="3" >王五</student>
        <student id="4" >赵六</student>
    </class>

    <class id="3" name="三班" >
        <student id="5" >小明</student>
        <student id="6" >小高 </student>
    </class>

    <class id="4" name="四班" >
        <student id="7" >小花</student>
        <student id="8" >小红 </student>
    </class>

</classList>

assets里面的test3.xml：

<?xml version="1.0" encoding="utf-8"?>
<classList>

    <class id="1" name="一班" >
       <student id="1" >
           <name>张三</name>
           <sex>男</sex>
       </student>
       <student id="2" >
           <name>李四</name>
           <sex>男</sex>
       </student>
    </class>

    <class id="2" name="二班" >
       <student id="3" >
           <name>王五</name>
           <sex>男</sex>
       </student>
       <student id="4" >
           <name>赵六</name>
           <sex>男</sex>
       </student>
    </class>

    <class id="3" name="三班" >
        <student id="5" >
           <name>小明</name>
           <sex>男</sex>
       </student>
        <student id="6" >
           <name>小高</name>
           <sex>男</sex>
       </student>
    </class>

    <class id="4" name="四班" >
       <student id="7" >
           <name>小花</name>
           <sex>女</sex>
       </student>
       <student id="8" >
           <name>小红</name>
           <sex>女</sex>
       </student>
    </class>

</classList>

http://www.tuicool.com/articles/EZrqEb