package com.example.asynctaskprojest;

import java.io.BufferedInputStream;
import java.io.Closeable;
import java.io.InputStream;
import java.net.URL;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;

public class MainActivity extends Activity 
{
	MyTask mt;
	TextView tvInfo, myTextView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        tvInfo = (TextView) findViewById(R.id.tvInfo);
        myTextView = (TextView) findViewById(R.id.simple_text);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
    
    public void onclick(View v) {
        mt = new MyTask();
        mt.execute();
      }

      class MyTask extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
          super.onPreExecute();
          tvInfo.setText("Begin");
        }

        @Override
        protected Void doInBackground(Void... params) {
        	 InputStream is = null;
             try {
                 DocumentBuilder documentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
                 URL url = new URL("http://www.boi.org.il/currency.xml");
                 is = new BufferedInputStream(url.openStream());
                 Document document = documentBuilder.parse(is);
                 document.getDocumentElement().normalize();

                 NodeList nodes = document.getElementsByTagName("CURRENCY");
                 for (int i = 0; i < nodes.getLength(); i++) {
                     Node node = nodes.item(i);
                     if (node.getNodeType() == Node.ELEMENT_NODE) {
                    	 myTextView.append("\n");
                         myTextView.append("New");
                     }
                 }
             } catch (Throwable e) {
           	 myTextView.append("\n\nhas error: " + e);
             } finally {
              //   closeQuietly(is);
                 myTextView.append("\n\ndone");
             }
             return null;
        }

        @Override
        protected void onPostExecute(Void result) {
          super.onPostExecute(result);
          tvInfo.setText("End");
        }
        
/*
        private static CharSequence getValue(String string, Element element) {
            NodeList nodes = element.getElementsByTagName(string).item(0).getChildNodes();
            Node node = (Node) nodes.item(0);
            return node.getNodeValue();
        }

        private static void closeQuietly(Closeable resource) {
            if (resource != null) {
                try { resource.close(); } catch (Exception e) {}
            }
        }*/

    }