MapsActivity.java

package com.mjchoi.GoogleMapsTutorial;

import java.util.List;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MapView.LayoutParams;
import com.google.android.maps.Overlay;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MapsActivity extends MapActivity {

	MapView mapView;
	MapController mc;
    GeoPoint p;
    LocationManager lm;
    LocationListener locationListener;
    
    /*
    class MapOverlay extends com.google.android.maps.Overlay
    {
        @Override
        public boolean draw(Canvas canvas, MapView mapView, 
        boolean shadow, long when) 
        {
            super.draw(canvas, mapView, shadow);                   
 
            //---translate the GeoPoint to screen pixels---
            Point screenPts = new Point();
            mapView.getProjection().toPixels(p, screenPts);
 
            //---add the marker---
            Bitmap bmp = BitmapFactory.decodeResource(
                getResources(), R.drawable.pushpin);            
            canvas.drawBitmap(bmp, screenPts.x, screenPts.y-50, null);         
            return true;
        }
    } 
	*/
    
	public boolean onKeyDown(int keyCode, KeyEvent event) 
    {
        MapController mc = mapView.getController(); 
        switch (keyCode) 
        {
            case KeyEvent.KEYCODE_3:
                mc.zoomIn();
                break;
            case KeyEvent.KEYCODE_1:
                mc.zoomOut();
                break;
        }
        return super.onKeyDown(keyCode, event);
    }    
	

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

        //---use the LocationManager class to obtain GPS locations---
        lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        
        locationListener = new MyLocationListener();
        
        lm.requestLocationUpdates(
            LocationManager.GPS_PROVIDER, 
            0, 
            0, 
            locationListener);
        
        mapView = (MapView) findViewById(R.id.mapView);
        mapView.setStreetView(true);
        mapView.setSatellite(true);
        LinearLayout zoomLayout = (LinearLayout)findViewById(R.id.zoom);  
        View zoomView = mapView.getZoomControls();
 
        zoomLayout.addView(zoomView, 
            new LinearLayout.LayoutParams(
                LayoutParams.WRAP_CONTENT, 
                LayoutParams.WRAP_CONTENT)); 
        mapView.displayZoomControls(true);
        
        mc = mapView.getController();
/*
        String coordinates[] = {"43.067874", "-89.40936"};
        double lat = Double.parseDouble(coordinates[0]);
        double lng = Double.parseDouble(coordinates[1]);
        
        p = new GeoPoint(
                (int) (lat * 1E6), 
                (int) (lng * 1E6));
     
        mc.animateTo(p);
        mc.setZoom(17); 
*/
        
        //---Add a location marker---
        /*
        MapOverlay mapOverlay = new MapOverlay();
        List<Overlay> listOfOverlays = mapView.getOverlays();
        listOfOverlays.clear();
        listOfOverlays.add(mapOverlay); 
        */
        mapView.invalidate();
		
    }
 
    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }
    
    class MyLocationListener implements LocationListener 
    {
        public void onLocationChanged(Location loc) {
            if (loc != null) {                
                Toast.makeText(getBaseContext(), 
                    "Location changed : \nLat: " + loc.getLatitude() + 
                    " \nLong: " + loc.getLongitude(), 
                    Toast.LENGTH_LONG).show();
                
                GeoPoint p = new GeoPoint(
                        (int) (loc.getLatitude() * 1E6), 
                        (int) (loc.getLongitude() * 1E6));
                mc.animateTo(p);
                mc.setZoom(17);                
                mapView.invalidate();
            }
        }

        public void onProviderDisabled(String provider) {
            // TODO Auto-generated method stub
        }

        public void onProviderEnabled(String provider) {
            // TODO Auto-generated method stub
        }

        public void onStatusChanged(String provider, int status, Bundle extras) {
            // TODO Auto-generated method stub
        }
    }

}