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Android zensar

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Android zensar

  1. 1. Introduction to  Android
  2. 2. Some of the popular operating systems used in mobile gadgets are given below. 1. Symbian Nokia Windows Phone 2. iOS Apple 3. Blackberry O.S Blackberry 4. Android Many Handset manufacturers
  3. 3. “Android is a software stack for mobile devices that includes an operating system, middleware and key applications”
  4. 4. “We want the next killer application to be written for cell phones” - Andy Rubin, Google
  5. 5. • Multiple applications, running simultaneously • User may switch between running applications • Background services • Supports three Orientations • Has access to wi-fi, phone state, audio settings, external memory access.
  6. 6.  Android Market  Self-publish on your own web site  Use a 3rd party application store
  7. 7. • $25 registration fee for developers • developer receives 70% of each sale • remaining amount goes to carriers • Google does not take a percentage • http://www.android.com/market/
  8. 8. • Market got you down? • upload APK to your own web server • http://icecondor.com/download/icecondor-2008-10-26. • use correct MIME type application/vnd.android.package-archive
  9. 9. <------Android enabled Car Stereo Extras
  10. 10.  Android relies on Linux version 2.6 for core system services, acts as a layer between hardware and software. Manages the following;  Security  Memory management  Process management  Network stack  Driver model
  11. 11.  Not a Java VM  Design constraints: slow CPU, little RAM  Will run on OS without swap space  On compiling .class files will be changed to .dex format  The .dex format runs on the Dalvik platform.
  12. 12. A set of C/C++ libraries used by various components of the Android system. Some of the core libraries are listed below: • System C library - an implementation of the standard C system library (libc), tuned for embedded Linux-based devices • Media Libraries - the libraries support playback and recording of many popular audio, video and image formats . • Surface Manager - manages access to the display subsystem and seamlessly composites 2D and 3D graphic • LibWebCore - a modern web browser engine which powers both the Android browser and an embeddable web view • SGL - the underlying 2D graphics engine • FreeType - bitmap and vector font rendering • SQLite - a powerful and lightweight relational database engine available to all applications
  13. 13. • Activity Manager : Maintains the activities/screens of the applications that are displayed • Window Manager: Co-ordinates the orientation of phone, sensors etc. • Content : Manages the data to be transferred between Manager Activities / screens • View System : Controls the various layouts, button and UI level objects • Notification : Deals with the display of AlertBox, Toast msgs. Manager • Telephony : Handles the process like call, sms, mms etc. Manager • Location : Uses Google Maps to access location related info Manager
  14. 14. It supports wireless communications using GSM mobile-phone technology 3G 802.11 Wi-Fi networks Integrated Browser
  15. 15. UI  android.widget.*  android.view.*  android.graphics.*  android.app.Activity etc PhoneState  android.content.res.Configuration  android.hardware.Sensor  android.net.wifi.WifiManager Telephony android.telephony.TelephonyManager android.telephony.SmsManager
  16. 16.  Web android.webkit.WebView  Camera android.hardware.CameraDevice  Local database android.database.*  Maps com.google.android.maps.MapView  Location android.location.LocationManager  Multimedia android.media.MediaPlayer  HTTP org.apache.http.client.*
  17. 17. • API Level is an integer value that uniquely identifies the framework API revision offered by a version of the Android platform: Android 2.3 (Gingerbread) 9/10 Android 2.2 (Froyo) 8 Android 2.0/2.1 (Eclair) 7 Android 1.6 (Donut) 4 Android 1.5 (Cupcake) 3
  18. 18.  Android SDK  Eclipse plugin   Android emulator  Command line tools  Documentation  Debugging tools  Android NDK  Android PDK
  19. 19. Essential for the development of applications on android environment. Consists of the emulator, documentation, debugging tools and command line Also requires ADT plugin for merging with eclipse. Steps you must follow to set up the Android SDK: • Prepare your development computer and ensure it meets the system requirements. • Install the SDK starter package from the table above. (If you're on Windows, download the installer for help with the initial setup.) • Install the ADT plugin for Eclipse (if you'll be developing in Eclipse). • Add Android platforms and other components to your SDK. Installers available at : http://developer.android.com/sdk/index.html, http:// developer.android.com/sdk/eclipse-adt.html#installing
  20. 20. NDK is a companion tool to the Android SDK that lets you build performance-critical portions of your apps in native code. The NDK provides: • A set of tools and build files used to generate native code libraries from C and C++ sources • A way to embed the corresponding native libraries into application packages files (.apks) that can be deployed on Android devices • A set of native system headers and libraries that will be supported in all future releases of the Android platform. Some of the needed Android source code packages available in  http://android.git.kernel.org/ are: 1)Android.platform.bionic, 2)Android.platform.build, 3)Android.platform.system.core, and 4)Android.platform.system.base.
  21. 21. • Designed for platform developers and manufacturers building Android-powered devices. • Manages the porting of android operating system into a device that matches requirements • Allows the developer to alter based on their device Following are the main steps for porting Android:  Download the patches for Android  Update RIL (Radio Interface Library) for target platform  Update Board specific components such as Codec, Camera, Audio, Wifi, Power Management, Bluetooth etc.  Compile Android source code  Burn system image on Target platform
  22. 22. adb push <packagename.apk> /system/app/ ----------put in system folder adb devices – ----lists which devices are currently attached to your computer adb install <packagename.apk> – lets you install an Android application on your phone adb remount – Remounts your system in write mode – this lets you alter system files on your phone using ADB adb push <localfile> <location on your phone> – lets you upload files to your phones filesystem adb pull <location on your phone> <localfile> – lets you download files off your phones filesystem adb logcat – starts dumping log from the console to a local file – useful for debugging apps adb shell <command> – drops you into a basic linux command shell on your phone with no parameters, or lets you run commands directly adb devices – lists which devices are currently attached to your computer
  23. 23. • No support for placing or receiving actual phone calls • No support for camera/video capture (input) • No support for determining battery charge level • Emulator limitations • No support for Bluetooth
  24. 24. • An .apk file extension denotes an Android Package (APK) file. • A variant of the JAR format, is used for the distribution and installation of bundled components onto the Android mobile device platform. • An APK file is an archive that usually contains the following folders: META-INF res and files: AndroidManifest.xml classes.dex resources.arsc
  25. 25.  Java code Dynamic creation of UI e.g: AlertDialog.Builder alt_bld = new AlertDialog.Builder(this);  ImageButton imgBtn = new ImageButton(this); LinearLayout holder = new LinearLayout(this); holder.addView(imgBtn);   alt_bld.setView(holder); alt_bld.show()  XML UI creation before the creation of apk
  26. 26. The Thank You

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