Codejie's C++ Space

package jie.java.android.xmlfiletest;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
import org.xmlpull.v1.XmlSerializer;

import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.util.Xml;

public class XmlFileTestActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        writeXmlFile();
        
        readXmlFile();
    }
    
    
    private int writeXmlFile() {
        
        if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
            Log.d("xml", "mounted");
        }
        else {
            Log.d("xml", "not mount.");
        }
        
        File file = new File(Environment.getExternalStorageDirectory(), "my.xml");
        try {
            file.createNewFile();
        }
        catch (IOException e) {
            Log.e("xml", "file.createNewFile() exception." + e.getMessage());
            return -1;
        }
        
        FileOutputStream os = null;
        try {
            os = new FileOutputStream(file);
        } 
        catch (FileNotFoundException e) {
            Log.e("xml", "FileOutputStream exception.");
            return -1;
        }
        
        XmlSerializer serializer = Xml.newSerializer();
        try {
            serializer.setOutput(os, "UTF-8");
            serializer.startDocument(null, true);
            
            serializer.startTag(null, "root");
            serializer.attribute(null, "attr", "123");
            serializer.text("hello");
            serializer.endTag(null, "root");
            
            serializer.endDocument();
            serializer.flush();
            
            os.close();
        }
        catch (Exception e) {
            Log.e("xml", "serializer exception.");
        }
        
        return 0;
    }
    
    private int readXmlFile() {
        
        File file = new File(Environment.getExternalStorageDirectory(), "my.xml");       
        
        try {
            XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
            factory.setNamespaceAware(true);
            XmlPullParser xp = factory.newPullParser();
            
            FileInputStream is = new FileInputStream(file);
            
            xp.setInput(is, "UTF-8");
            
            int type = xp.getEventType();
            while(type != XmlPullParser.END_DOCUMENT) {
                if(type == XmlPullParser.START_DOCUMENT) {
                    
                }
                else if(type == XmlPullParser.START_TAG) {
                    Log.d("xml", "start tag:" + xp.getName());
                    Log.d("xml", "attr: " + xp.getAttributeName(0) + " value:" + xp.getAttributeValue(0));
                }
                else if(type == XmlPullParser.TEXT) {
                    Log.d("xml", "text:" + xp.getText());
                }
                
                type = xp.next();
            }
            
            is.close();
            
        }
        catch (XmlPullParserException e) {
            return -1;
        }
        catch (IOException e) {
            return -1;
        }
        
        return 0;
    }
}