introduction to Android Open Source Bridge June 17 2009 Portland, Oregon

1. Domo Arigato Mr. Roboto
Sean Sullivan
June 17, 2009

2. Wednesday June 17
3:50 PM - Morrison
Domo Arigato Mr. Roboto
Thursday June 18
11:20 AM - Hawthorne
Android Location Services

3. Android is a software stack for mobile devices
that includes an operating system, middleware
and key applications
source: Google

5. source: NY Times, May 27 2009

6. August 2005
Google acquires Android
November 2007
Open Handset Alliance announcement
Android SDK available

7. September 2008
HTC and T-Mobile announce G1
October 2008
Android 1.0
Android Market goes live
G1 available in retail stores in USA
Android open source project

8. February 2009
Android 1.1
HTC and Vodafone announce HTC Magic
April 2009
Android 1.5
HTC Magic available in Spain

10. June 2009
Acer joins Open Handset Alliance
Huawei announces U8230

11. Huawei U8230
source: http://www.huawei.com/news/view.do?id=10855&cid=42

12. Android applications
• multiple applications, running simultaneously
• user may switch between running applications
• background services
• copy and paste

13. Third party applications
lifeaware.net Maverick Android Locale

14. Distributing Android apps
• Android Market
• self-publish on your own web site
• use a 3rd party application store

15. Android Market

16. Android Market
• US$25 registration fee for developers
• developer receives 70% of each sale
• remaining amount goes to carriers
• Google does not take a percentage
• http://www.android.com/market/

17. Self-publishing
• upload application to your own web server
http://icecondor.com/download/icecondor-v20090201.apk
• use correct MIME type
application/vnd.android.package-archive

18. System Architecture

19. Open source project
• http://source.android.com
• Apache 2.0 and GPL v2
• Git repository

20. Android applications
• are written in the Java language
• run on the Dalvik virtual machine
• Android != J2ME

21. Dalvik VM
• not a Java VM
• design constraints: slow CPU, little RAM
• will run on OS without swap space
• http://sites.google.com/site/io/dalvik-vm-internals

22. Application API’s
java.util.*
java.io.*
Java
java.lang.*
etc
android.widget.*
UI android.view.*
android.graphics.*
Telephony android.telephony.*
SMS android.telephony.gsm.SmsManager

23. Application API’s
Web android.webkit.WebView
Camera android.hardware.CameraDevice
Local database android.database.*
Maps com.google.android.maps.MapView
Location android.location.LocationManager
Multimedia android.media.MediaPlayer
HTTP org.apache.http.client.*

24. Getting started
http://developer.android.com

25. Development tools
• Java SDK
• Android SDK
• Eclipse
• Eclipse plugin

26. Android SDK
• Android emulator
• command line tools
• documentation
• example applications

27. Android emulator

28. Eclipse plugin
https://dl-ssl.google.com/android/eclipse/

29. Android applications
• application package file: myapp.apk
• an application is composed of one or more
activities

30. Activity
• an activity is usually a single screen in your
application
• however, activities can also be faceless
• one activity is designated as the entry point
for your application

31. android.app.Activity
import android.app.Activity;
public class MyActivity extends Activity
{
public void onCreate(Bundle savedValues)
{
super.onCreate(savedValues);
setContentView(R.layout.main);
}
}

32. Application
building blocks
• AndroidManifest.xml • Intents &
IntentReceivers
• Activities
• Services
• Views
• Notifications
• Layouts
• ContentProviders

33. UI development
• XML
• Java code

34. Android Views
a view is an object that knows how to draw
itself on the screen

35. ListView

36. DatePicker

37. MapView

38. Additional topics
• Threading • Android IDL (AIDL)
• Security model • Data synchronization
• Internationalization • WiFi API
• Power management • Bluetooth API

39. What’s next for Android?
• more phones
• text to speech API
• “Donut”

40. Questions?

41. Thank you

42. Android resources
• http://developer.android.com
• http://android-developers.blogspot.com
• http://code.google.com/p/apps-for-android/
• http://sites.google.com/site/io/
• http://www.openhandsetalliance.com
• http://source.android.com