Android is an open source operating system designed for mobile devices based on the Linux kernel. It is led by Google and owned by the Open Handset Alliance. Android provides developers with tools and libraries to create rich applications and allows for customization. The Android software stack includes the Dalvik virtual machine, resources like images and XML files, and optionally native code libraries. Key building blocks of Android apps include Activities for screens, Intents for moving between screens, Services for background processes, and ContentProviders for sharing data.

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