Barcamp Antwerpen - How To Make Your Own Google Latitude

Barcamp Antwerp 21/03/09 Michaël Uyttersprot twitter.com/eMich // www.emich.be

More and more GPS enabled phones  Started all with the Nokia N95 ◦ iPhone 3G ◦ Nokia N79, N85, N97,… ◦ HTC G1 ◦ … and lots of others to come!

It becomes a lot easier to program mobile  apps External devices can be approached easily 

iPhone SDK  Python ME  CLDC a.k.a. J2ME  Native C++ because we all « love » that  … 

I love GPS-enabled services  I love Java  Google Maps does everything I once had in  mind … actually not really 

Great service, but limited to my friends  I want to show my location on my blog  But there is no API yet! 

No wordpress, written my own blog software  No third party moblogging  ◦ Does pictures ◦ Does geotagging based on picture metadata ◦ Does video as well But still no eMich latitude?! I suck… 

Different building blocks  ◦ GPS enabled phone: Nokia N79 ◦ J2ME using the JSR179 specification also known as « Location » ◦ Web server that records GPS coordinates ◦ Google Maps, of course, because eMich maps would be an impossible thing (except Open maps or something blablabla)

Location API  Obtain GPS coordinates from a GPS-enabled  phone Very easy: just a few lines of code! 

Criteria cr = new Criteria(); cr.setHorizontalAccuracy(500); LocationProvider locationProvider = LocationProvider.getInstance(cr); Location location=locationProvider.getLocation(60); Coordinates c = location.getQualifiedCoordinates(); c.getLatitude() c.getLongitude() c.getAltitude()

A thread loops every 10 seconds  Reads coordinates from Location API  Sends them to a web server: test.emich.be  Keeps in DB:  Latitude ◦ Longitude ◦ UserId ◦ Timestamp ◦

Reads last entry  Displays a map with a marker 

Push content based on location  ◦ Wikipedia articles ◦ Commercial messages… Doing fun stuff  ◦ How much time do I spend with my girlfriend? ◦ Mash it up for twitter to mash it up with fights

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Barcamp Antwerpen - How To Make Your Own Google Latitude

by eMich on Mar 24, 2009

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Barcamp Antwerpen - How To Make Your Own Google Latitude — Presentation Transcript