Android course (lecture1)

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Information about Android course (lecture1)
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Published on March 11, 2014

Author: a_elsayed2010

Source: slideshare.net

Android Course Amira Elsayed Ismail 1

Agenda • Why Learn Android? • Prerequisites. • Android History. • What is Android? • Android Architecture. 2

Why Learn Android? • Run your applications on 59% of the smartphones worldwide (Jul - 2012). • Join in 600,000 applications for android (Jul - 2012). • Not just smartphone, Android OS is being used in, TVs, Microwaves, Car Tapes. Etc… • High job success rates. • Create app sell to market very easily. 3

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Prerequisites • Object-oriented programming. • You must understand terms like (Class, Instance, Method, Superclass and Subclass). • Installation of Eclipse IDE & Android SDK Tools. • Install all SDKs preferably (2.1, 2.2 & 4.x). • An android device. (Optional but highly recommended). 5

Android History • Started by Android Inc. in 2005, which had been financed by Google. • In 2007 Google bought Android Inc. • Android beta was released in Nov 2007. • Android v1.0 was released in Sep 2008. • Latest android version is 4.4 (Kitkat). 6

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What is Android?  Android is an operating system for mobile devices such as smartphones and tablet computers.  Android has beaten Apple iOS, being the leading mobile operating system from first quarter of 2011 9

Android Architecture  Android system is composed of following items:  Linux Kernel.  Libraries.  Applications Framework.  Applications. 10

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Android Architecture (Cont’d)  Linux Kernel  Its customized Linux kernel with a lot more android specific code to support devices.  One of the kernel's main function is to control hardware. 12

Android Architecture (Cont’d)  Libraries  Webkit  Modern web browser engine used in both web view as well as native browser.  Support CSS, Java script, DOM, Ajax etc. 13

Android Architecture (Cont’d)  Libraries  Media framework  PacketVideo, openCORE platform.  Support Audio, Video, Still-frame formats. 14

Android Architecture (Cont’d)  Libraries  SQLite  Self-contained.  Serverless.  Zero-configuration.  SQL Database. 15

Android Architecture (Cont’d)  Libraries  OpenGL|ES(openGL for EmbeddedSystems)  Standard specification for 2D/3D graphics.  Can simulate physics.  Complex 3D scenes can be drawn.  Used in (Virtual reality, Augmented reality, Game programming, Scientific visualization and Flight simulation). 16

Android Architecture (Cont’d)  Libraries  Surface Manager  Manages access to display subsystem.  Seamlessly composites graphic layers 2D/3D layers from different applications. 17

Android Architecture (Cont’d)  Libraries  SGL (Skia graphic library)  An underlying 2D graphics engine.  Used to draw text, geometries & images. 18

Android Architecture (Cont’d)  Libraries  SSL (Secure Sockets Layer)  Cryptographic protocol to provide information security over internet. 19

Android Architecture (Cont’d)  Libraries  FreeType  Bitmap and vector font rendering. 20

Android Architecture (Cont’d)  Android Runtime  Dalvik Virtual Machine  Provides application portability and runtime consistency.  Runs optimized file format (.dex) and Dalvik bytecode. 21

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Android Architecture (Cont’d)  Android Runtime  Core Libraries  Data structures  File Access  Graphics  Network Access  Utilities 23

Android Architecture (Cont’d)  Applications Framework  Activity Manager  Interact with overall activities running in the system.  Manage lifecycle of activities.  Manage stacking of activities. 24

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Android Architecture (Cont’d)  Applications Framework  Window Manager  Dispatch input events to clients.  Transition animation.  Create layout/surfaces (using SurfaceManager). 26

Android Architecture (Cont’d)  Applications Framework  Content Providers  Manage access to structured access of data.  Mainly used for data sharing purposes. 27

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Android Architecture (Cont’d)  Applications Framework  View System  Basic building block for UI components.  Can be extended to build custom UI components. 29

Android Architecture (Cont’d)  Applications Framework  Package Manager  Provides methods for querying and manipulating installed packages. 30

Android Architecture (Cont’d)  Applications Framework  Telephony Manager  Provides access to telephony services on android.  Can monitor telephone state changes. 31

Android Architecture (Cont’d)  Applications Framework  Location Manager  Provide access to system location services.  Able to track location periodically or one- time. 32

Android Architecture (Cont’d)  Applications Framework  Resource Manager  Link external resources to native app at build time.  Resources may include XML Layouts, Bitmaps, raw files etc. 33

Android Architecture (Cont’d)  Applications Framework  Notification Manager  Notify users about events. 34

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