Android讀取XML資源

獲取XML文件的基本思路是，通過getResources().getXml()獲的XML原始文件，得到XmlResourceParser對象，通過該對象來判斷是文檔的開頭還是結尾，是某個標籤的開始還是結尾，並通過一些獲取屬性的方法來遍歷XML文件，從而訪問XML文件的內容，下面是一個訪問XML文件內容的例子，並將內容更顯示在一個TextView上

ReadXMLTest.java

Java代碼

/*
* @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);
//設置按鈕監聽器
myButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
//設置定時器
int counter = 0;
//實例化StringBuilder
StringBuilder sb = new StringBuilder("");
//得到Resources資源
Resources r = getResources();
//通過Resources，獲得XmlResourceParser實例
XmlResourceParser xrp = r.getXml(R.xml.test);
try {
//如果沒有到文件尾繼續執行
while (xrp.getEventType() != XmlResourceParser.END_DOCUMENT) {
//如果是開始標籤
if (xrp.getEventType() == XmlResourceParser.START_TAG) {
//獲取標籤名稱
String name = xrp.getName();
//判斷標籤名稱是否等於friend
if(name.equals("friend")){
counter++;
//獲得標籤屬性追加到StringBuilder中
sb.append("第"+counter+"個朋友的信息："+"\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) {
}
//下一個標籤
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);
       //設置按鈕監聽器
       myButton.setOnClickListener(new OnClickListener() {
		@Override
		public void onClick(View v) {
			//設置定時器
			   int counter = 0;
			   //實例化StringBuilder
		       StringBuilder sb = new StringBuilder("");
		       //得到Resources資源
		       Resources r = getResources();
		       //通過Resources，獲得XmlResourceParser實例
	    	   XmlResourceParser xrp = r.getXml(R.xml.test);
		       try {
		    	   //如果沒有到文件尾繼續執行
				while (xrp.getEventType() != XmlResourceParser.END_DOCUMENT) { 
					//如果是開始標籤
					     if (xrp.getEventType() == XmlResourceParser.START_TAG) {
					    	 //獲取標籤名稱
					          String name = xrp.getName();
					          //判斷標籤名稱是否等於friend
					          if(name.equals("friend")){
					        	  counter++;
					        	  //獲得標籤屬性追加到StringBuilder中
					        	  sb.append("第"+counter+"個朋友的信息："+"\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) { 
					     } 
					     //下一個標籤
					     xrp.next(); 
					}
				myTextView.setText(sb.toString());
			} catch (XmlPullParserException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	});
    }
}

main.xml

Java代碼

<?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="讀取XML文件內容"
/>
<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="讀取XML文件內容"
/>
<TextView  
	android:id="@+id/text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" 
    android:text=""
    />
</LinearLayout>

res/xml目錄下的test.xml文件

Java代碼

<?xml version="1.0" encoding="utf-8"?>
<resources>
<friend name="hualang" age="22" gender="male" email="[email protected]"/>
<friend name="nimo" age="21" gender="female" email="[email protected]"/>
</resources>

<?xml version="1.0" encoding="utf-8"?>
<resources>
	<friend name="hualang" age="22" gender="male" email="[email protected]"/>
	<friend name="nimo" age="21" gender="female" email="[email protected]"/>
</resources>

運行結果

注意：如果沒有加入import org.hualang.readxml.R;這句話，點擊按鈕後沒有反應，原因不知道