Introduction into Android Programming

1. Android Programmierung leichtgemacht Lars Vogel Twitter: @vogella Google+: http://gplus.to/vogella

2. Lars Vogel Independent Eclipse und Android Consultant and Trainer Works also for SAP AG as “Product Owner” a a SCRUM team Writes Tutorials for Java, Eclipse and Android with~25 000 visitors per day on http://www.vogella.de

3. During this presentation Android overview Android Programming Q&A

4. What is Android? - Software stack based on Linux with a Java programming interface. - Open Source - Developed officially by the Open Handset Alliance lead by Google

5. On Android you develop in Java Really?

6. Android Programming You use the Java programming language but Android does not run Java Bytecode

7. Android Programming Application runs on the Dalvik virtual machine Tool dx converts Java Bytecode into Dalvik Executable Code (.dex) You use the Java programming language but Android does not run Java Bytecode

8. Main target of Dalvik Low memory consumption and fast execution

9. Overview of the API Capabilities Rich UI components Threads and Background Processing Full network stack (Http, JSON) Database and File System access Access to the hardware (GPS, Camera, Phone) and much more............

10. Restrictions Its a freaking phone

11. Developer Toolchain

12. Android Development Tools (ADT) for Eclipse Eclipse based tooling Windows Linux (i386) Mac OS (Intel)

13. Emulator QEMU-based ARM emulator runs same image as a device Use same toolchain to work with device or emulatorInital startup is slooooowwwwww.....

14. Demo

15. AndroidManifest.xml Central configuration file for your application uses-permission: asked to uses something which requires permission permissions: the new permissions that the app defines instrumentation: the events that should be hooked uses-library: defines the optional libraries which the app uses uses-sdk: which SDK uses the application application: defines activities, services, content provider and broadcast receiver

16. Android programming constructs

17. Main Android programming constructs Activity Views Intents Broadcast Receiver Services ContentProvider

18. Demo Your first project Activity

19. Activity An activity is a single, focused thing that the user can do. Extends “android.app.Activity” Layout of Activity defines UI elements and their arrangements

20. DemoPresentation Timer

21. Life Cyle of an Activity void onCreate(Bundle savedInstanceState) void onStart() void onRestart() void onResume() void onPause() void onStop() void onDestroy() Android may destroy you!

22. I had only the best intents....

24. Explicit: Asking someone to do something

25. Implicit: Asking the system who can do something Intent

26. Implicit Intents new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.vogella.de")); new Intent(Intent.ACTION_CALL, Uri.parse("tel:(+49)12345789"));

27. Demo: Create and call the “Your are done” activity

28. Services © Lars Vogel and others, Licensed under Creative Commons by-nc-nd-3.0 (de)

30. VibratorService

31. LocationService

32. AlarmService

33. ....Access via context.getSystemService(Context.CONST); You can define your own service.

34. Timer check ApplicationLets alert!

35. Broadcast Receiver – Listen to system events Example: BATTERY_LOW, ACTION_BOOT_COMPLETED Defined statically in manifest or temporary via code

36. Security

37. Each apps gets into own Linux user and runs in its own process

39. Phone access

40. Contacts

41. Internet

43. I can talk and hear Internet (java.net, Apache HttpClient, JSON...) Bluetooth Email SMS VoIP (SIP (Session Initiation Protocol))

44. I have feelings Camera API Motion Detection Location API (GIS) Heat Sensor Accelerator

45. Other Capabilities Push to device Storage: File System / Preferences SQLiteDatabase Interactive Widgets on the homescreen Live Wallpapers (as background) Animations and Styling Simple List handling (Multi-) Touch NFS Canvas / OpenGL ES (Game programming....)

46. Performance?

47. Be fast! Avoid ApplicationNotResponding Error Threads not allowed to modify the UI directly Use handler or AsyncTask to update the UI after Thread is done

48. Summary Android powerful and well-designed development platform Marketleader for Smartphones Power to the developer

49. Android: Where to go from here: Android Tutorial http://www.vogella.de/articles/Android/article.html TODAY: 14:00 Talk: Safety First - Android sicher programmieren - Benjamin Reimold and Stephan Linzner

51. Thank you For further questions: Lars.Vogel@gmail.com http://www.vogella.de Twitter http://www.twitter.com/vogella Google+ http://gplus.to/vogella

53. Performance snail 1181451

54. Performance Running man 377100

55. Hang-man 620961

56. Summary http://www.sxc.hu/photo/1184807

57. Question http://www.sxc.hu/photo/418215

58. Reading material http://www.sxc.hu/photo/406547