Android System Design And Power Management
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This document provides an introduction to the Android technology. It discusses that Android is an open-source, Linux-based operating system for mobile devices. The document outlines Android's system architecture, including the Linux kernel, middleware and key components like the Dalvik virtual machine. It also compares Android to other mobile operating systems and notes Android's rapid growth and popularity.
Android System Design And Power Management
- 1. Introduction To Android Technology Nilay Mishra (NilayM@quinnox.com) Swathi C (CSwathi@quinnox.com)
- 2. Android Basics. Android System Architecture . Power Management and Bindings. Dalvik Virtual Machine Android Vs Other OS. Objective
- 3. A Software platform and operating system for smart devices. Based on the Linux kernel. Android was found way back in 2003. It was developed in Palo Alto, California. WHAT IS ANDROID.?
- 5. Android Android has open system architecture that means any one can develop there application according to there need Android is open source over Symbian/iOS/RIM/BADA /others that are copyrighted by there respective companies
- 7. Android, Inc. was founded in Palo Alto, California in October 2003 by Andy Rubin (co-founder of Danger),Rich Miner (co- founder of Wildfire Communications, Inc.) and Nick Sears (once VP at T-Mobile). In July 2005, Google acquired Android Inc. for at least $50 million and Google collaborate with OHA
- 8. A business alliance consisting of 80 companies to develop open standards for mobile devices Companies in OHA are
- 11. Relying on Linux Kernel 2.6/3.4/3.10 for core syste m services Memory and Process Management Network Stack Driver Model Security Providing an abstraction between the H/W and the rest of the S/W stack. Android S/W Stack – Linux Kernel
- 13. Kernel Enhancements Power Management Binder
- 14. Mobile devices depend on battery power and batteries have limited capacity So The main Question is how to handle this???
- 15. PM is built on top of standard Linux Power Management. PM supports more aggressive power management policy. Components make requests to keep the power on through “Wake Locks”. PM supports several different types of wake “Wake Locks”.
- 17. Binder facilitate IPC between applications and service Why is Binder Required?
- 18. Applications and Services may run in separate processes but must communicate and share data IPC can introduce significant processing overhead and security hole
- 19. Dalvik Virtual Machine Providing environment on which every Android application runs Each Android application runs in its own process, with its own instance of the Dalvik VM.
- 20. What is Dalvik machine
- 21. Dalvik Virtual Machine (Cont) Executing the Dalvik Executable (.dex) format .dex format is optimized for minimal memory footprint. Compilation
- 22. Loaded into Dalvik VM
- 23. • Fastest growing mobile OS • Over 300,000+ Android activations a day • Android overtook iOS as the dominant OS in US during 2H 2010 • First phone launched HTC G1 in 2008 • Currently an OS of choice for Motorola, HTC, Samsung, Sony Ericsson, among others • Software updates every few months
- 24. OS Mkt Share # of Apps Revenue Developer Interest Easiness of PL Platform Multitasking Security OS Upgrades App Approval Payments & Avail.
- 25. Android OS: ◦ open platform, allowing the use of 3rd party tools ◦ Key to OS success ◦ can reach core components. More like PC swr iOS: ◦ Restrictive guidelines ◦ Fixed set of tools, nothing outside, nothing deep ◦ No Flash!
- 26. Nilay Mishra (NilayM@quinnox.com) Swathi C (CSwathi@quinnox.com)