Android读取XML资源

获取XML文件的基本思路是，通过getResources().getXml()获的XML原始文件，得到XmlResourceParser对象，通过该对象来判断是文档的开头还是结尾，是某个标签的开始还是结尾，并通过一些获取属性的方法来遍历XML文件，从而访问XML文件的内容，下面是一个访问XML文件内容的例子，并将内容更显示在一个TextView上

ReadXMLTest.java

Java代码






/*
* @author hualang
*/
package org.hualang.readxml;

import java.io.IOException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import android.app.Activity;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import org.hualang.readxml.R;

public class ReadXMLTest extends Activity {
private TextView myTextView;
private Button myButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

myTextView = (TextView)findViewById(R.id.text);
myButton = (Button)findViewById(R.id.button);
//设置按钮监听器
myButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//设置定时器
int counter = 0;
//实例化StringBuilder
StringBuilder sb = new StringBuilder("");
//得到Resources资源
Resources r = getResources();
//通过Resources，获得XmlResourceParser实例

XmlResourceParser xrp = r.getXml(R.xml.test);
try {
//如果没有到文件尾继续执行
while (xrp.getEventType() != XmlResourceParser.END_DOCUMENT) {
//如果是开始标签
if (xrp.getEventType() == XmlResourceParser.START_TAG) {
//获取标签名称

String name = xrp.getName();
//判断标签名称是否等于friend

if(name.equals("friend")){
counter++;
//获得标签属性追加到StringBuilder中

sb.append("第"+counter+"个朋友的信息："+"\n");
sb.append(xrp.getAttributeValue(0)+"\n");
sb.append(xrp.getAttributeValue(1)+"\n");
sb.append(xrp.getAttributeValue(2)+"\n");
sb.append(xrp.getAttributeValue(3)+"\n\n");
}
} else if (xrp.getEventType() == XmlPullParser.END_TAG) {
} else if (xrp.getEventType() == XmlPullParser.TEXT) {
}
//下一个标签
xrp.next();
}
myTextView.setText(sb.toString());
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}

/*
* @author hualang
*/
package org.hualang.readxml;

import java.io.IOException;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import android.app.Activity;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
import org.hualang.readxml.R;

public class ReadXMLTest extends Activity {
private TextView myTextView;
private Button myButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

myTextView = (TextView)findViewById(R.id.text);
myButton = (Button)findViewById(R.id.button);
//设置按钮监听器
myButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//设置定时器
int counter = 0;
//实例化StringBuilder
StringBuilder sb = new StringBuilder("");
//得到Resources资源
Resources r = getResources();
//通过Resources，获得XmlResourceParser实例
XmlResourceParser xrp = r.getXml(R.xml.test);
try {
//如果没有到文件尾继续执行
while (xrp.getEventType() != XmlResourceParser.END_DOCUMENT) {
//如果是开始标签
if (xrp.getEventType() == XmlResourceParser.START_TAG) {
//获取标签名称
String name = xrp.getName();
//判断标签名称是否等于friend
if(name.equals("friend")){
counter++;
//获得标签属性追加到StringBuilder中
sb.append("第"+counter+"个朋友的信息："+"\n");
sb.append(xrp.getAttributeValue(0)+"\n");
sb.append(xrp.getAttributeValue(1)+"\n");
sb.append(xrp.getAttributeValue(2)+"\n");
sb.append(xrp.getAttributeValue(3)+"\n\n");
}
} else if (xrp.getEventType() == XmlPullParser.END_TAG) {
} else if (xrp.getEventType() == XmlPullParser.TEXT) {
}
//下一个标签
xrp.next();
}
myTextView.setText(sb.toString());
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
}

main.xml

Java代码






<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="读取XML文件内容"
/>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<Button
android:id="@+id/button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="读取XML文件内容"
/>
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
/>
</LinearLayout>

res/xml目录下的test.xml文件

Java代码






<?xml version="1.0" encoding="utf-8"?> <resources> <friend name="hualang" age="22" gender="male" email="hualang@yahoo.com"/> <friend name="nimo" age="21" gender="female" email="1234567@qq.com"/> </resources>

<?xml version="1.0" encoding="utf-8"?>
<resources>
<friend name="hualang" age="22" gender="male" email="hualang@yahoo.com"/>
<friend name="nimo" age="21" gender="female" email="1234567@qq.com"/>
</resources>

运行结果

注意：如果没有加入import org.hualang.readxml.R;这句话，点击按钮后没有反应，原因不知道



加入import org.hualang.readxml.R;后，运行结果如下