android level 1 @ androiod camp @devent 3 by dina wasef

1. Level 1 (beginner level)
Dina Wasef

2. Overview
What is Android ??!!
 Android is an operating system designed for mobile
device based on linux kernel .
 Led by google and owned by Open Handset Alliance.
.

3. Overview
WHY ANDROID ??!!
 Free & open platform (stack).
 Give developper tool and libraries to make rich
appliccation.
 Open for customization
 Android market

4. History of Android

10. ANDROID SOFTWARE STACK

12. Android and Java

13. APK File
 Dalvik executable This is the code that runs
your application.
 Resources are everything that is not code.
(XML,images ,video,layouts ,...etc)
 Native libraries (optionally)

14. INSTALLATION
 Installing Eclipse http://www.eclipse.org/downloads/
 Installing the Android SDK
 Android Software Development Kit (SDK) is all you need to
develop android application
http://developer.android.com/sdk/installing.html

16. Sdk folder >>> tools>>> android

17. HELP >>> Install New Software >>> Add
Http://dl-ssl.google.com/android/eclipse

19. Windows>>preferences>>android

20. HELLO WORLD
New >> Android project

22. Mainfest.xml

23. res/layout/main.xml

24. Strings.xml

25. R.java

26. Hello world.java

27. MAIN BUILDING BLOCKS
 Activity.
 Intents.
 Services.
 Content providers.

28. Activity

29. Activity
 Consider usually as asingle screen that user
see on device like text apps .
 ex. website .
 Each activity has its own cycle .
 It is implemented as aclass .
 When new screen opens prev.one
 paused and put in history stack .

31. INTETS
 They are system msg running inside device
notifies apps for events, from hardware state to
incoming data
 For android to move from screen to screen
called intent
 You create your own intent object to launch aother
apps

32. service
 It is the code that long lived and run
without UI
 ex.media player apps & network
download
 Media player Activity could start service
using Context.startservice() to run in
background to keep music going

33. ContetProvider
 sharable data storage Enable data
sharing between apps
 Simple interface with insert , update
 Android development encourage
other apps to have data while
mainting complete control over data
how to get accessed
 It is aclass the implement standard
set of methods

34. UI
 Declarative
 Programmatic
components
 layout
 Views

35. LAYOUTS
 Linear layout
 Frame layout
 Absolute layout
 Relative layout
 Table layout

36. Linear layout

37. Relative layout