Android XmlPullParser的简单实施

发布时间：2021-11-25 17:08:16 所属栏目：PHP教程来源：互联网

导读：Android XmlPullParser的简单应用 package lxy.litsoft; import java.io.IOException; import java.io.StringReader; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import org.xmlpull.v1.XmlPullParserFactory; im

Android XmlPullParser的简单应用
package lxy.litsoft;

import java.io.IOException;
import java.io.StringReader;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class AppMain extends Activity{
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        try {
            testParser();
        } catch (XmlPullParserException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private void testParser()throws XmlPullParserException,IOException
    {
        /**XmlPullParserFactory: this class is used to create implementation of XML Pull Parser.**/
        //XmlPullParserFactory这个类用于实现一个XML的解析器
        /**newInstance(): Create a new instance of a PullParserFactory that can be used to create XML pull parsers .**/
        //newInstance()方法用于实例化一个PullParserFactory对象，以便于创建XML解析器
        XmlPullParserFactory factory = XmlPullParserFactory.newInstance();

        /**setNamespaceAware():Specifies that the parser produced by this factory will provide support for XML names paces.**/
        //指定由XmlPullParserFactory对象产生的解析器能提供对XML命名空间的支持
        factory.setNamespaceAware(true);

        /**Creates a new instance of a XML Pull Parser using the currently configured factory features.**/
        //用当前的XmlPullParserFactory实例化一个XmlPullParser对象
        XmlPullParser xpp = factory.newPullParser();

        /**Set the input source for parser to the given reader and resets the parser.**/
        //为解析器输入源，源为一个StringReader对象
        /**StringReader:A specialized Reader that reads characters from a String in a sequential manner. **/
        //StringReader类是一个专门的阅读器，以顺序的方式从字符串里读取字符
        xpp.setInput( new StringReader ( "<liu>I am Liuliu</liu><huo>Missing Huohuo</huo>" ) );

        /**Returns the type of the current event (START_TAG, END_TAG, TEXT, etc.)**/
        int eventType = xpp.getEventType();
        while (eventType != XmlPullParser.END_DOCUMENT) {
             if(eventType == XmlPullParser.START_DOCUMENT) {
                 Log.d("test", "Start document");
             } else if(eventType == XmlPullParser.END_DOCUMENT) {
                 Log.d("test", "End document");
             } else if(eventType == XmlPullParser.START_TAG) {
                 Log.d("test", "Start tag: "+xpp.getName());
             } else if(eventType == XmlPullParser.END_TAG) {
                 Log.d("test", "End tag: "+xpp.getName());
             } else if(eventType == XmlPullParser.TEXT) {
                 Log.d("test", "Text: "+xpp.getText());
             }
             eventType = xpp.next();
        }
    }
}
输出结果：

Start document

Start tag: liu

Text:I am LIuliu

End tag: liu

Start tag: huo

Text: Missing Huohuo

End tag: huo

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