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Android - Basic Steps

Android Architecture

Linux Kernel

Contains the basic services
  • Security 
  • Memory & process managenemt
  • File & network I/O
  • Device drivers
  • Specific Features as:
    • Power management
    • android shared memory
    • low memory killer

Libraries

  • System C libraries
  • Surface Mgr (Display management)
  • Media Framework (Audio / Video)
  • Webkit (Browser engine)
  • OpenGL (Grpahics engine)
  • Android Runtime (are the ones who runs the applications)
    • Core Libraries 
      • Basic Java classes JAVA.* , JAVAX.*
      • App lifeclycle   ANDROID.*
      • Internet / WS  ORG.*
      • Unit test  JUNIT.*
    • Dalvik virtual machine
      • run the applications as a classes.dex; transforms java bytecode to classes.dex file 
      • this virtual  machine is design to run in limited resources
https://www.youtube.com/watch?v=ptjedOZEXPM

Application Framework

  • Package Manager - Contains all the application in the device
  • Window Manager 
  • View System - Provide the icons, tabs
  • Resource Manager - String, graphics & layouts (language)
  • Activity Manager - Manages app life-cycle and navigation stack
  • Location Manager - Provides location and movements
  • Notification Manager - Show the notification bar as in the sms

Applications

  • Standard applications


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