XMLParsing

package com.androidhive.xmlparsing;

import java.util.ArrayList;
import java.util.HashMap;

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

import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

public class AndroidXMLParsingActivity extends ListActivity {

    // All static variables
    static final String URL = "http://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20weather.forecast%20where%20woeid%20in%28select%20woeid%20from%20geo.places%20where%20text%3D%22Delhi%22%29&diagnostics=true";
    // XML node keys
    static final String KEY_ITEM = "item"; // parent node
    static final String KEY_ID = "title";
    static final String KEY_NAME = "geo:lat";
    static final String KEY_COST = "geo:long";
    static final String KEY_DESC = "yweather:forecast";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ArrayList<HashMap<String, String>> menuItems = new ArrayList<HashMap<String, String>>();

        XMLParser parser = new XMLParser();
        String xml = parser.getXmlFromUrl(URL); // getting XML
        Log.d("xml",xml);

        Document doc = parser.getDomElement(xml); // getting DOM element
        Log.d("doc",""+doc);
        Log.d("parser.getDomElement(xml)",""+parser.getDomElement(xml));

        NodeList nl = doc.getElementsByTagName(KEY_ITEM);
        Log.d("parser.getElementValue(doc);",""+parser.getElementValue(doc));

        parser.getElementValue(doc);
        // looping through all item nodes <item>
        for (int i = 0; i < nl.getLength(); i++) {
            // creating new HashMap
            HashMap<String, String> map = new HashMap<String, String>();
            Element e = (Element) nl.item(i);
            // adding each child node to HashMap key => value
            map.put(KEY_ID, parser.getValue(e, KEY_ID));
            Log.d("KEY_ID",parser.getValue(e, KEY_ID));

            map.put(KEY_NAME, parser.getValue(e, KEY_NAME));
            Log.d("KEY_NAME",parser.getValue(e, KEY_NAME));

            map.put(KEY_COST, "Rs." + parser.getValue(e, KEY_COST));
            Log.d("KEY_COST",parser.getValue(e, KEY_COST));

            map.put(KEY_DESC, parser.getValue(e, KEY_DESC));
            Log.d("KEY_DESC",parser.getValue(e, KEY_DESC));

            Log.d("map",""+map);
            // adding HashList to ArrayList
            menuItems.add(map);
            Log.d("menuItems",""+menuItems);
        }

        // Adding menuItems to ListView
        ListAdapter adapter = new SimpleAdapter(this, menuItems,
                R.layout.list_item,
                new String[] { KEY_NAME, KEY_DESC, KEY_COST }, new int[] {
                        R.id.name, R.id.desciption, R.id.cost });

        setListAdapter(adapter);

        // selecting single ListView item
        ListView lv = getListView();

        lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // getting values from selected ListItem
                String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
                String cost = ((TextView) view.findViewById(R.id.cost)).getText().toString();
                String description = ((TextView) view.findViewById(R.id.desciption)).getText().toString();

                // Starting new intent
                Intent in = new Intent(getApplicationContext(), SingleMenuItemActivity.class);
                in.putExtra(KEY_NAME, name);
                in.putExtra(KEY_COST, cost);
                in.putExtra(KEY_DESC, description);
                startActivity(in);

            }
        });
    }
}