ANDROID OS

ANDROID OS

1. FEATURES

   • Near Field Communication (NFC)
   • Alternate Keyboards
   • Wireless App Downloads
   • No-Touch Control
   • Custom ROMs

2. DEVELOPMENT

   • most of the names of OS are named after desserts
   • launched different versions of Android till now
   • an open source operating system written in Linux
   • launched by Google in 2008

3. ARCHITECTURE

   • LINUX KERNEL
     • Security
     • Memory Management
     • Process Management
     • Network Stack
     • Driver Model
   • LIBRARIES
     • The Android Runtime
     • Media Frameworks
     • Secure Socket Layer (SSL)
     • WebKit
     • Open GL (Graphics Library)
   • APPLICATION FRAMEWORK
     • Activity Manager
     • Telephony Manager
     • View System
     • Location Manager
   • ANDROID RUNTIME

4. VERSION HISTORY

   • Android Inc. was founded in Palo Alto, California
   • ANDROID 1.0
     • released in September 2008
   • ANDROID 1.6 DONUT
     • released in September 2009
     • FEATURES
       • support for carriers that used CDMA-based network
       • Power Control Widget for managing Wi-Fi, Bluetooth, GPS, etc
   • ANDROID 2.0 ECLAIR
     • FEATURES
       • text-to-speech support
       • introduced live wallpapers
       • multiple account support
       • Google Maps navigation
   • ANDROID 4.0 ICE CREAM SANDWICH
     • released in October 2011
     • FEATURES
       • unlock phone using its camera to take a picture of it's owner
       • biometric sign-in support
   • ANDROID 3.0 HONEYCOMB
     • released in February 2011 for installation only on tablets and larger displays of mobile devices
     • FEATURES
       • redesigned UI specifically for large screens
       • notification bar placed on the bottom of a tablet's display
   • ANDROID 4.1-4.3 JELLY BEAN
     • released in October 2012 & July 2013 respectively
     • FEATURES
       • notification features that showed more content or action buttons
       • "Project Butter" to speed up animations & improve Android's touch responsiveness
   • ANDROID 2.2 FROYO ("frozen yogurt")
     • FEATURES
       • Wi-Fi mobile hotspot functions
       • push notifications via Android Cloud to Device Messaging (C2DM) service
       • flash support
   • ANDROID 2.3 GINGERBREAD
     • launched in September 2010
     • FEATURES
       • support using Near Field Communication (NFC)
       • groundwork for the selfie by adding multiple cameras
   • ANDROID 5.0 LOLLIPOP
     • FEATURES
       • Google's new material design language, made liberal use of lighting & shadow effects
   • ANDROID 6.0 MARSHMALLOW
     • FEATURES
       • vertically scrolling app drawer
       • fingerprint biometric unlock
       • USB Type-C support
       • Android Pay
   • ANDROID 4.4 KITKAT
     • FEATURES
       • optimized to run on smartphones that had as little as 512MB of RAM
   • ANDROID 7..0. NOUGAT
     • FEATURES
       • multi-tasking functions for smartphones that have bigger displays
   • ANDROID 1.5 CUPCAKE
     • released in April 2009
     • FEATURES
       • support third-party keyboards
       • ability to upload videos to YouTube
       • phone's screen display to automatically rotate to the right positions
   • ANDROID 8.0 OREO
     • FEATURES
       • native support for picture-in-picture mode
       • notification channels
       • new autofill APIs for better management of passwords & fill data

5. SECURITY TECHNOLOGY/MODEL

   • Security at the operating system level through the Linux kernel
   • Mandatory application sandbox
   • Secure interprocess communication
   • Application signing
   • Application-defined and user-granted permissions

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