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Android and android phones

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Android and android phones

  1. 1. ANDROID ANDANDROIDPHONES
  2. 2. WHAT IS ANDROID? Android is a software stack for mobile devices that includes an operating system, middleware and key applications.
  3. 3. BRIEF HISTORY 2005  Google acquires startup Android Inc. to start Android platform  Work on Dalvik VM begins 2007  Open Handset Alliance announced  Early look at SDK 2008  Google sponsors 1st Android Developer Challenge  T-Mobile G1 announced  SDK 1.0 released  Android released open source (Apache License)  Android Dev Phone 1 released
  4. 4. Brief History cont. 2009  SDK 1.5 (Cupcake)  New soft keyboard with “autocomplete” feature  SDK 1.6 (Donut)  Support Wide VGA  SDK 2.0/2.0.1/2.1 (Eclair)  Revamped UI, browser 2010  Nexus One released to the public  SDK 2.2 (Froyo)  Flash support, tethering  SDK 2.3 (Gingerbread)  UI update, system-wide copy-paste
  5. 5. Brief History cont. 2011  SDK 3.0/3.1/3.2 (Honeycomb) for tablets only  New UI for tablets, support multi-core processors  SDK 4.0/4.0.1/4.0.2/4.0.3 (Ice Cream Sandwich)  Changes to the UI, Voice input, NFC Ice cream SandwichHoneycomb Android 4.0+Android 3.0-3.2
  6. 6. What is an Android Phone? SinceGoogle built Android as an open standard device, anyone can build applications for the phone and enhance them. Android is completely customizable!
  7. 7. Android Architecture
  8. 8. Applications for AndroidMore than 10,000 applications are available for free or for purchase on Android Market.
  9. 9. Mobile Applications What are they?  Any application that runs on a mobile device Types  Web apps: run in a web browser  HTML, JavaScript, Flash, server-side components, etc.  Native: compiled binaries for the device  Often make use of web services
  10. 10.  Development process for an Android app
  11. 11. Android Apps Built using Java and new SDK libraries  No support for some Java libraries like Swing & AWT  Oracle currently suing Google over use Java code compiled into Dalvik byte code (.dex)  Optimized for mobile devices (better memory management, battery utilization, etc.) Dalvik VM runs .dex files
  12. 12. Building and running Compiled resources (xml files) Android Debug Bridge  ADB is a client server program that connects clients on developer machine to devices/emulators to facilitate development.  An IDE like Eclipse handles this entire process for you.http://developer.android.com/guide/developing/building/index.html#detailed-build
  13. 13. What is an Android Phone? LikeApple’s iPhone, Android has a touch screen. Some Android phones also have keyboards.
  14. 14. Different designsfor Android homescreens
  15. 15. Google’sHeadquarters
  16. 16. The (bad) Reviews  Resizing is clumsy and difficult.  No easy way to get your music library onto phone.  Video/music player are “hideous.”  Official apps not as polished as iPhone counterparts.  Looking through apps on phone and syncing with computer can be tedious.  Not the simplest device to figure out.  Phone controls inconsistent.  Can be slow.
  17. 17. The (good) Reviews Google’s apps are “simply awesome.” A bit cheaper. Very good mobile browser. Good for tech-savvy people. Developing and improving faster than any other phone on the market. Large room for potential growth and improvements!
  18. 18. Mobile Devices: Advantages(as compared to fixed devices) Always with the user Typically have Internet access Typically GPS enabled Typically have accelerometer & compass Most have cameras & microphones Many apps are free or low-cost
  19. 19. Mobile Devices: Disadvantages Limited screen size Limited battery life Limited processor speed Limited and sometimes slow network access Limited or awkward input: soft keyboard, phone keypad, touch screen, or stylus Limited web browser functionality Range of platforms & configurations across devices
  20. 20. Building and running (more details) Android Asset Packing Tool  Expand figure Allows processes across apps to communicate.  Android Interface Definition Language (AIDL) – Definitions to exchange data between applications (think SOAP)http://developer.android.com/guide/developing/building/index.html#detailed-build
  21. 21. Applications Are Boxed By default, each app is run in its own Linux process  Process started when app’s code needs to be executed  Threads can be started to handle time- consuming operations Each process has its own Dalvik VM By default, each app is assigned unique Linux ID  Permissions are set so app’s files are only visible to that app
  22. 22. Android Architecture
  23. 23. Publishing and Monetizing Paid apps in Android Market, various other markets Free, ad-supported apps in Android Market  Ad networks (Google AdMob, Quattro Wireless)  Sell your own ads Services to other developers  Ex. Skyhook Wireless (http://www.skyhookwireless.com/) Contests (Android Developer Challenge) Selling products from within your app
  24. 24. Android Market http://www.android.com/market/ Has various categories, allows ratings Have both free/paid apps Featured apps on web and on phone The Android Market (and iTunes/App Store) is great for developers  Level playing field, allowing third-party apps  Revenue sharing
  25. 25. Publishing to Android Market Requires Google Developer Account  $25 fee Link to a Merchant Account  Google Checkout  Link to your checking account  Google takes 30% of app purchase price
  26. 26. Android Design Philosophy Applications should be:  Fast  Resource constraints: <200MB RAM, slow processor  Responsive  Apps must respond to user actions within 5 seconds  Secure  Apps declare permissions in manifest  Seamless  Usability is key, persist data, suspend services  Android kills processes in background as needed
  27. 27. Apple vs. Google Android Open Handset Alliance  30+ technology companies  Commitment to openness, shared vision, and concrete plans Compare with Mac/PC battles  Similar (many PC manufacturers, one Apple)  Different (Microsoft sells Windows, Google gives away Android)

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