package de.itemis.frey.blog.lbsv2;
 
import java.util.Iterator;
import java.util.List;
 
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
 
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.OverlayItem;
 
/**
 * This application demonstrates the use of the google maps view in combination
 * with an ItemizedOverlay.
 *
 * @author frey
 */
public class LocationBasedServicesV2 extends MapActivity {
 
	private MapView myMap;
	private LocationManager locManager;
	private LocationListener locListener;
 
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
 
		initMap();
		initLocationManager();
	}
 
	/**
	 * Initialise the map and adds the zoomcontrols to the LinearLayout.
	 */
	private void initMap() {
		myMap = (MapView) findViewById(R.id.mymap);
 
		View zoomView = myMap.getZoomControls();
		LinearLayout myzoom = (LinearLayout) findViewById(R.id.myzoom);
		myzoom.addView(zoomView);
		myMap.displayZoomControls(true);
 
	}
 
	/**
	 * Initialise the location manager.
	 */
	private void initLocationManager() {
		locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
 
		locListener = new LocationListener() {
 
			public void onLocationChanged(Location newLocation) {
				createAndShowMyItemizedOverlay(newLocation);
			}
 
			public void onProviderDisabled(String arg0) {
			}
 
			public void onProviderEnabled(String arg0) {
			}
 
			public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
			}
		};
		locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,
				locListener);
 
	}
 
	/**
	 * This method will bea called whenever a cahnge of the current position
	 * is submitted via the GPS.
	 * @param newLocation
	 */
	protected void createAndShowMyItemizedOverlay(Location newLocation) {
		List overlays = myMap.getOverlays();
 
		// first remove old overlay
		if (overlays.size() > 0) {
			for (Iterator iterator = overlays.iterator(); iterator.hasNext();) {
				iterator.next();
				iterator.remove();
			}
		}
 
		// transform the location to a geopoint
		GeoPoint geopoint = new GeoPoint(
				(int) (newLocation.getLatitude() * 1E6), (int) (newLocation
						.getLongitude() * 1E6));
 
		// initialize icon
		Drawable icon = getResources().getDrawable(R.drawable.pointer);
		icon.setBounds(0, 0, icon.getIntrinsicWidth(), icon
				.getIntrinsicHeight());
 
		// create my overlay and show it
		MyItemizedOverlay overlay = new MyItemizedOverlay(icon);
		OverlayItem item = new OverlayItem(geopoint, "My Location", null);
		overlay.addItem(item);
		myMap.getOverlays().add(overlay);
 
		// move to location
		myMap.getController().animateTo(geopoint);
 
		// redraw map
		myMap.postInvalidate();
	}
 
	@Override
	protected boolean isRouteDisplayed() {
		return false;
	}
}

package de.itemis.frey.blog.lbsv2;
 
import java.util.ArrayList;
import java.util.List;
 
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
 
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapView;
import com.google.android.maps.OverlayItem;
 
public class MyItemizedOverlay extends ItemizedOverlay {
 
	private List items;
	private Drawable marker;
 
	public MyItemizedOverlay(Drawable defaultMarker) {
		super(defaultMarker);
		items = new ArrayList();
		marker = defaultMarker;
	}
 
	@Override
	protected OverlayItem createItem(int index) {
		return (OverlayItem)items.get(index);
	}
 
	@Override
	public int size() {
		return items.size();
 
	}
 
	/*
	 * (non-Javadoc)
	 *
	 * @see
	 * com.google.android.maps.ItemizedOverlay#draw(android.graphics.Canvas,
	 * com.google.android.maps.MapView, boolean)
	 */
	@Override
	public void draw(Canvas canvas, MapView mapView, boolean shadow) {
		super.draw(canvas, mapView, shadow);
		boundCenterBottom(marker);
 
	}
 
	public void addItem(OverlayItem item) {
		items.add(item);
		populate();
	}
 
}