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Introduction to android development

Introduction to android development. Dr. Razi Iqbal razi. iqbal @leads.edu.pk. What is Android?. Its an OS for mobile phones It is a modified form of Linux It runs on Linux Kernel 2.6 Bought by Google in 2005 Android is open source Source Code is available at

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Introduction to android development

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  1. Introduction to android development Dr. Razi Iqbal razi.iqbal@leads.edu.pk

  2. What is Android? • Its an OS for mobile phones • It is a modified form of Linux • It runs on Linux Kernel 2.6 • Bought by Google in 2005 • Android is open source • Source Code is available at http://source.android.com/ • Different hardware vendors can build their devices and run Android on them

  3. Android Versions

  4. Android Features • Storage • SQLite • Connectivity • GSM • CDMA • LTE • Wi-Fi • WiMax • Messaging • Multitouch • Multitasking

  5. Android Architecture

  6. Android Architecture • Linux Kernel • Android runs on Linux Kernel 2.6. • A Kernel is collection of programs that helps in interaction of software and hardware. These programs are called drivers. • Android because of its foundation on Linux Kernel contains all the basic functionality of Linux e.g. Memory Management. • A device with certain hardware should have a proper driver in the Linux Kernel to work properly • Bluetooth will not work until the driver is available for that hardware.

  7. Android Architecture • Libraries • Android contains some core libraries which help build different other libraries. • Some of the most important libraries are • Media Framework • Contains all the codecs for media • WebKit • It is a browser engine that runs HTML content • SQLite • Handles storage of data

  8. Android Architecture • Android Runtime • Dalvik Virtual Machine • It is a virtual machine like JVM. • It does not run .class file, instead it runs .dex files • These files are created from .class files at compilation time. • Multiple instances of DVM can run simultaneously. • Core Libraries • It contains different libraries from Java SE and Java ME

  9. Android Architecture • Application Framework • As a developer we directly interact with this layer. • This layer contains libraries which provide basic functionality for android like call, messaging and resource management etc. • Some of them are • Activity Manager • It takes care of the activity life cycle • Location Manager • It handles the location

  10. Android Architecture • Applications • Based on all the previously mentioned layers, our applications will be available at Applications Layer. • Almost all the applications are handled at this layer. • Default apps also fall in this category • Some of the default apps are • Phone • Messaging • Mail

  11. Android Smart Phones Galaxy S II Motorola Atrix 4G, HTC EVO 4G

  12. Android Tablets Asus Eee Pad Transformer TF101 Samsung Galaxy Tab 10.1

  13. Android EBook Readers Amazon’s Kindle Fire Barnes and Noble’s NOOK Color

  14. Android Based TV Scandinavia Android TV

  15. Mashup Compatibility Combination of two or more service to create an App. • Geolocation + Social networking • Geolocation + Gaming • Camera + Geolocation • Contacts + Maps

  16. Components of Android Programming Activities • Android Application are composed of Activities • Each Application will have at least one Activity • Activities are like container • Code • User Interface • Its like Form for Windows in Vb.net Activity Hello World !

  17. Components of Android Programming Intents Intent = Action + Data • It can be transition between two activities • It can be launching an app from one app • It’s a message to Android System to tell app will do something

  18. Components of Android Programming Cursorless Control • Unlike PCs, no cursor on screen • Fingers are used to perform Screen Actions • Multitouch gestures • Zooming • Dragging • Long Press right click

  19. Components of Android Programming Views and Widgets • View is a rectangular area on screen for drawing • Menu • Context Menu • Widgets are advanced UI Controls • Buttons • Checkboxes • DatePickers etc.

  20. Components of Android Programming Background Service • Service is a program that doesn’t need to have a UI • A background service runs in the background • Antivirus application in windows is a background service • Alarm app runs in background for mobile phones

  21. Android Hardware Tools

  22. Google APIs • Android can do more than Calls and Messages • It can help in navigating • It can help in showing a friend on map

  23. Android in Cloud • Information can be stored in Cloud • Information can be retrieved from Cloud

  24. Android Development Tools

  25. Requirements Any PC running • Windows • Min. Windows Xp • Mac OS X • Min. 10.5.8 • Linux • Ubuntu Linux • Eclipse • Min. 3.6.2 • JDK • Min JDK 6

  26. JDK Error

  27. Eclipse + AVD

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