Autocompletion:
Some notes:

  1. XML Parsing
  2. ArrayAdapter for adapting the listview visual display
  3. ListView iconized approach: https://w2davids.wordpress.com/android-listview-with-iconsimages-and-sharks-with-lasers/

NOTE: Latest Updated version :
https://w2davids.wordpress.com/android-auto-completionwith-icons/

File: main.xml

<!--?xml version="1.0" encoding="utf-8"?-->




File: country_item.xml

<!--?xml version="1.0" encoding="utf-8"?-->


File: Main.java

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

public class Main extends Activity
	{
		/** Called when the activity is first created. */
		@Override
		public void onCreate(Bundle savedInstanceState)
			{
				super.onCreate(savedInstanceState);
				setContentView(R.layout.listview);
				setTitle("TestAutoCompletion");

                                // Parse countries
				CountryParser countryParser = new CountryParser();
				InputStream inputStream = getResources().openRawResource(R.raw.countries);
				countryParser.parse(inputStream);

                                // Get Countries
				List countryList = getCountryList(countryParser.getList());

                                 AutoCompleteTextView autoSearch = (AutoCompleteTextView)
				 this.findViewById(R.id.auto_search);
				 ArrayAdapter adapter = new ArrayAdapter(getApplicationContext(), R.layout.country_item, countryList);
				 autoSearch.setAdapter(adapter);

                                 // Threshold for how many items to display in dropdown list
				 autoSearch.setThreshold(1);
         }

            private List getCountryList(List countries)
			{
				List list = new ArrayList();
				for (Country c : countries)
					{
						list.add(c.name);
					}
				return list;
			}
}

File: Country.java

public class Country
	{
		public String name;
		public String abbreviation;
		String region;
		public String resourceId;

		public Country()
			{
				// TODO Auto-generated constructor stub
			}

		public Country(String name, String abbreviation, String region, String resourceFilePath)
			{
				this.name = name;
				this.abbreviation = abbreviation;
				this.region= region;
				this.resourceId = resourceFilePath;
			}

		@Override
		public String toString()
			{
				return this.name;
			}
	}

File: CountryParser.java

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

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

import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import android.util.Log;

public class CountryParser
	{

		private static final String tag = "CountryParser";
		private DocumentBuilderFactory factory;
		private DocumentBuilder builder;
		private final HashMap map;
		private final List list;

		public CountryParser()
			{
				this.list = new ArrayList();
				this.map = new HashMap();
			}

		private String getNodeValue(NamedNodeMap map, String key)
			{
				String nodeValue = null;
				Node node = map.getNamedItem(key);
				if (node != null)
					{
						nodeValue = node.getNodeValue();
					}
				return nodeValue;
			}

		public List getList()
			{
				return this.list;
			}

		public String getAbbreviation(String country)
			{
				return this.map.get(country);
			}

		/**
		 * Parse XML file containing body part X/Y/Description
		 *
		 * @param inStream
		 */
		public void parse(InputStream inStream)
			{
				try
					{
						// TODO: after we must do a cache of this XML!!!!
						this.factory = DocumentBuilderFactory.newInstance();
						this.builder = this.factory.newDocumentBuilder();
						this.builder.isValidating();
						Document doc = this.builder.parse(inStream, null);

						doc.getDocumentElement().normalize();

						NodeList countryList = doc.getElementsByTagName("country");
						final int length = countryList.getLength();

						for (int i = 0; i < length; i++)
							{
								final NamedNodeMap attr = countryList.item(i).getAttributes();
								final String countryName = getNodeValue(attr, "name");
								final String countryAbbr = getNodeValue(attr, "abbreviation");
								final String countryRegion = getNodeValue(attr, "region");

								Country country = new Country(countryName, countryAbbr, countryRegion, countryAbbr + ".png");
								this.list.add(country);
								this.map.put(countryName, countryAbbr);
								Log.d(tag, country.toString());
							}
					}
				catch (SAXException e)
					{
						e.printStackTrace();
					}
				catch (IOException e)
					{
						e.printStackTrace();
					}
				catch (ParserConfigurationException e)
					{
						e.printStackTrace();
					}

			}
	}
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