Mobile Me(dia)

Week 10 - Location

Moving from place to place

Location Based Services

Where are you?

GPS with JME/Mobile Processing

import processing.core.*;
import com.mobvcasting.msimplelocation.*;

public class MSimpleLocationTest extends PMIDlet 
{	
	MSimpleLocation loccap;
	
	String captureKey = "Get Location";
    String testKey = "Test Reading";
	String location = "No Location Yet";

    PFont font;
	
	public void setup()
	{
	    loccap = new MSimpleLocation((PMIDlet)this);
	    softkey(captureKey);
        font = loadFont("ArialMT-12.mvlw");
        textFont(font);
	}
	
	public void draw()
	{
          background(255);
          text(location,10,15);
	}

	public void softkeyPressed(String label)
	{
		if (label.equals(captureKey))
		{
			location = "No Location Yet";
			loccap.startLocationSearch(10);
			softkey(testKey);
			redraw();
		}
        else if (label.equals(testKey))
        {
        	location = "reading: " + loccap.getStatus() + " " + loccap.getLatitude(); 
        }
	}
	
	public void libraryEvent(Object library, int event, Object data)
	{
		try
		{
              if (event == 2)
              {
		location = "found location " + ((MSimpleLocation)library).getLatitude() + " " + event;
              }
              else if (event == 3)
              {
                 location = "failed search"; 
              }
		}
		catch (Exception e)
		{
			location = e.getMessage();
		}
	}
}
		
		
		

GPS with Android

package com.mobvcasting.locationexample;

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class LocationExample extends Activity implements LocationListener 
{
    private static final int MENU_FIND_LOCATION = 1;

	TextView latTV;
	TextView lngTV;

	/** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
                
        setContentView(R.layout.main);
        
        latTV = (TextView) this.findViewById(R.id.lattv);
        latTV.setText("Started");
        lngTV = (TextView) this.findViewById(R.id.lngtv);
        
    }
        
    /* Creates the menu items */
    public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(0, MENU_FIND_LOCATION, 0, "Find Location");
        return true;
    }

    /* Handles item selections */
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
	        case MENU_FIND_LOCATION:
	        	latTV.setText("Searching");
	            findLocation();	        	
	            return true;
        }
        return false;
    }
    
    public void findLocation()
    {
    	latTV.setText("button pushed");

    	LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    	List locationProviders = locationManager.getAllProviders();
    	
    	if (!locationProviders.isEmpty())
    	{
    		// Use first location provider
    		String defaultLocationProvider = locationProviders.get(0);
    		latTV.setText(defaultLocationProvider);
    		if (locationProviders.size() > 1)
    			lngTV.setText(locationProviders.get(1));
    		
    		try
    		{
    			// Every Minute
			locationManager.requestLocationUpdates("network", 60000, 0, this);
			// You could use "gps" in place of "network" for more accuracy 
    			
    			Location currentLocation = locationManager.getLastKnownLocation("network");
			// Same thing here with "gps" in place of "network"

    			Double lat = currentLocation.getLatitude()*1E6;
    	    	Double lng = currentLocation.getLongitude()*1E6;
    	    	    	
    	    	latTV.setText("" + lat);
    	    	lngTV.setText("" + lng);
    			
    		}
    		catch (Exception e)
    		{
    			lngTV.setText(e.toString());
    		}
    	}
    	
    }    
    
    public void onLocationChanged(Location currentLocation)
    {
    	Double lat = currentLocation.getLatitude()*1E5;
    	Double lng = currentLocation.getLongitude()*1E5;
    	    	
    	latTV.setText("" + lat);
    	lngTV.setText("" + lng);
    }
    
	public void onProviderDisabled(String arg0) {		
	}

	public void onProviderEnabled(String provider) {
	}

	public void onStatusChanged(String provider, int status, Bundle extras) {
	}
}