Google Maps in Android

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Israel Ferrer - @rallat – israel@bubiloop.com

Who am I?

Israel Ferrer Camachoco-founder and.roid.es & bubiloop.comBusiness Developer at bubiloop.comAndroid Developer

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Israel Ferrer - @rallat - israel@bubiloop.com

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Google I/O 2010

Location and Maps in Android

Israel Ferrer CamachoJune 17, 2010

developer.android.com

Agenda

Google Maps in Android

Location in Android

Show me the code

Questions

Google Maps in AndroidGoogle Maps is an external library to the Android

Features Google Maps Google Maps Android

World Maps

Mode Sat/Street View/Traffic

Places content

Compass

Google Maps in AndroidGeoPoint: longitude/latitude stored as

integer in microdegrees (degrees * 1E6)

Overlay: Base class representing an overlay which may be displayed on top of a map

OverlayItem: The basic component of any ItemizedOverlay.

ItemizedOverlay: A base class for an Overlay which consists of a list of OverlayItems

Google Maps in AndroidMapActivity: Base class with code to manage

the boring necessities of any activity that displays a MapView

MapView: A View which displays a map (with data obtained from the Google Maps service).

MapController: A utility class to manage panning and zooming of a map.

MyLocationOverlay: An Overlay for drawing the user's current location (and accuracy) on the map, and/or a compass-rose inset.

Google Maps in Android¿What?

We can show custom markers with info at someplace in a map

¿How?PrerequisitesShow the map using MapViewCreate our custom marker classMapActivity:

Add marker to our located overlaysAdd this located overlays to our MapView

Prerequisites

Create an Android project with Google APIs support

PrerequisitesManifest Permissions:

Add permission to use Google Maps external library

<uses-library android:name="com.google.android.maps" />

Add permission to use Internet

<uses-permission android:name="android.permission.INTERNET" />

Google Maps API key for mobile:http://tinyurl.com/androidkeyapi

MapViewXML Definition MapView

MapActivityCreate MapActivity to show the MapView

MyLocationOverlayThis object create an overlay that shows your

location.

Custom MarkerObject that extends ItemizedOverlay

Object is initialize with a Drawable our custom marker

Custom MarkerPopulate our custom marker ItemizedOverlay

with OverlayItems

Finally, add our custom marker Overlay to MapView Overlays

Hello Map!

To Sum Up

Location in Android¿What?

Location-based services are technique to figure out where you are

¿How?PrerequisitesLocation ManagerLocation Listener

Prerequisites

Manifest PermissionsGPS Location

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

Network Location

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

Location

Manager

Location-Based Services (LBS) are handle using the LocationManager

Two Location providers in Android: GPS, Network

Define Criteria object to obtain the best provider

Location

Manager

One we get the best provider is time to get locationGet last know location

Get the location changesRequest Location Manager this updates

Location Listener Used for receiving notifications from the LocationManager

when the location has changed

To Sum Up

Maps and LocationEasy to use in your apps

Once we’ve got the location, we can show data on the map just with the method update(location) to refresh de UI

Q&AAll the source from this session is in

http://bblp.to/mobile20

Questions?

ThanksTwitter: @rallat

Mail: israel@bubiloop.com

Projects: bubiloop.com & and.roid.es

Google Maps in Android

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