The document is a presentation on getting started with Android application development. It discusses why Android is a good platform, how to set up the development environment, the basic application components in Android like activities and services, debugging tools, and how to publish applications on the Android market. It also provides some resources for learning more about Android development.

1. A Noob’s Guide to Android Application Development By: Chua Zi Yong Singapore Android User Group www.codeandroid.org BarCamp Singapore 3 28/2/2009

2. Who am I? Student from NUS – Bioengineering Interest in mobile platforms C programming sellAndroid != false (Google can pay me if they want =D); Intent intent = new Intent(BarCamp3.this, ShareInterest.class); By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

3. What is in this presentation? Why Android? How to Get Started? “ Deep” Dive How to Publish? Resources Available Q&A

4. Why Android? I am cool! By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

5. Why Android? Open Market Place Instant publishing and feedback! You can create “ANYTHING” By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

6. Why Android? Background applications Finally useful apps fBook notification! Contextual based applications … .. yourapp.apk By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

7. Why Android? Develop on ANY platform FREE (no need to buy!) Windows Linux Mac By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

8. Why Android? Not just on mobile! Netbooks MIDs Desktop Phone?? By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

9. How to get started? Fix me! By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

10. How to get started? Things to install (developer.android.com) Java Developers Kit (JDK ) Eclipse or any other IDE Android SDK Android Developers Tool (ADT) By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

11. “ Deep” Dive By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

12. “ Deep” Dive Applications in Java Import Java libraries Import Android libraries GUI Widgets Animation By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

13. Starting an Application Activity Lifecyle void onCreate void onStart() void onRestart() void onResume() void onPause() void onStop() void onDestroy() By: Chua Zi Yong Singapore Android User Group www.codeandroid.org “ Deep” Dive

14. Applications Fundamentals Activities (Application != Activity) What the user see on the screen 1 app can have multiple activities Draw using xml and call by Activity.setContentView() Services Runs in background indefinitely E.g. music playback even when activity is stopped Broadcast receivers does nothing but receive and react to broadcast announcements E.g. SMS receiver Content providers Data that can be accessed by the application SQlite or any file system By: Chua Zi Yong Singapore Android User Group www.codeandroid.org “ Deep” Dive

15. Applications Fundamentals Intent Intent object holds the content of the message E.g. intent is used when you want to start a new activity and intent will carry the name of the activity and content needed to be pass through Android Manifest Declaring the application's components e.g. libraries Identifying any permissions the application expects to be granted Mostly auto generated by ADT in Eclipse By: Chua Zi Yong Singapore Android User Group www.codeandroid.org “ Deep” Dive

16. Example: PathFinder@SG extending ListActivity Package: com.pathfinder.sg CategoriesListActivity.java PlacesListActivity.java Services: MyPositionService .java (to obtain location from GPS, cell tower) Content Provider: xml file in /res/raw containing location data By: Chua Zi Yong Singapore Android User Group www.codeandroid.org “ Deep” Dive

17. Set view using ListAdapter (since this is ListActivity) Starting GPS/ntw service Staring the Application: OnCreate Android logging class for logcat on DDMS (debugging) By: Chua Zi Yong Singapore Android User Group www.codeandroid.org “ Deep” Dive

18. Moving to Another Activity Using Intent By: Chua Zi Yong Singapore Android User Group www.codeandroid.org Initialize intent variable: Intent(packageContext, Class) Start activity Add extended content to be passed through intent: putExtra(String name, value) Bonus point: If you intend to end current activity and back to previous, use finish() instead “ Deep” Dive

19. Make sure you stop services that is not needed upon exit! i.e. GPS service will otherwise continue to run in background By: Chua Zi Yong Singapore Android User Group www.codeandroid.org Remember to consider other parts of the lifecycle “ Deep” Dive

20. By: Chua Zi Yong Singapore Android User Group www.codeandroid.org Android Manifest User permission needed Declare activities within the application “ Deep” Dive

21. Applications Debugging DDMS in Eclipse using ADB By: Chua Zi Yong Singapore Android User Group www.codeandroid.org “ Deep” Dive

22. How to Publish? By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

23. How to Publish? Export and signing your app Export your application from Eclipse project Application will be exported as .apk Sign myapp.apk with Keytool and Jarsigner (within JDK) Take note on validity date of private key during keygen – recommend at least “10000 days” http://developer.android.com/guide/publishing/app-signing.html By: Chua Zi Yong Singapore Android User Group www.codeandroid.org Suggested commands $ keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -validity 10000 $ jarsigner -verbose -keystore my-release-key.keystore my_application.apk alias_name

24. How to Publish? Publishing on Android Market Sign up as an Android developer at developer.android.com USD$25 sign up fee Upload and monitor! By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

25. How to Publish? Market Business Policies Payment - 70% developer 30% telco Currently paid apps in UK and US No obscene materials (porn etc) 24 hour return policy Dispute resolution handled by developer and user directly Google holds the right to remove application if found of violation http://www.codeandroid.org/forum/?wpforumaction=viewtopic&t=1.0 By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

26. Resources By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

27. Resources Android Resources developer.android.com Open Source Codes for Android Application code.google.com/hosting/ Online Tutorials www.anddev.org Developers Group Google Group (Android Beginner, Developer, Discuss) Codeandroid.org (Singapore Android User Group) By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

28. Resources GUI XML Tool for Android DroidDraw Hacking/Flashing Android ROMs XDA Developers List of all applications on Android Market http://www.cyrket.com/ By: Chua Zi Yong Singapore Android User Group www.codeandroid.org

29. Q&A By: Chua Zi Yong Singapore Android User Group www.codeandroid.org ??