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Android

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Ravi Shankar
Ravi Shankar

Android is a software platform for mobile devices based on the Linux operating system. It was developed by Google and the Open Handset Alliance. The document then provides a history of Android versions from 1.0 in 2007 to 4.1/4.2 Jelly Bean in 2012. It also describes key Android features like its application framework, Dalvik virtual machine, integrated browser, and hardware integration for graphics, audio, video, Bluetooth, GPS and more. Finally, it outlines the basic building blocks of an Android application like activities, intents, services, content providers and broadcast receivers, and provides an example "Hello World" application code.

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Android Google
Objective Find the Answer of fallowing What is Android ? Android Architecture ? Development Tools ? Basic building Block of Android Applicaton ? Hello World Application.
What is Android ? Android is a Software platform for mobile devices. Based on Linux operation system Develop by Google and (OHA)
Version history Android 1.0(Beta)-5 November 2007 Android 1.0-23 September 2008 Android 1.1- 9 February 2009 Android 1.5 Cupcake-30 April 2009 Android 1.6 Donut-15 September 2009 Android 2.0/2.1 clair-26 October 2009 Android 2.2.x Froyo-20 May 2010 Android 2.3.x Gingerbread-6 December 2010 Android 3.x Honeycomb-22 February 2011 Android 4.0.x Ice Cream Sandwich-19 October 2011 Android 4.1/4.2 Jelly Bean-27 June 2012*
Android Features Application Framework Dalvik virtual machine Integrated (webkit) browser 2D and 3D graphics APIs with HW SQLite Video and audio codecs Bluetooth, EDGE, 3G, and WiFi Camera, GPS, compass, and accelerometer
Android Architecture
Development Tools Java Android SDK Eclipse IDE (optional)
Basic building Block of Android Applicaton Activities-An activity is usually a single screen that the user sees Intents-Intents are messages that are sent among major building blocks Services-Services run in the background and dont have any user interface components. Content Providers-Content Providers are interfaces for sharing data between applications. Broadcast Receivers-Global event events SMS arrives, or call comes in, or battery runs low etc..
Hello World Application Mainlayout.xml public class MainActivit extends <RelativeLayout Activity { xmlns:android="http://schemas.android.com/apk/re s/android" xmlns:tools="http://schemas.android.com/tools" private TextView mEmpName; android:layout_width="fill_parent" @Override android:layout_height="match_parent"> protected void onCreate(Bundle <TextView savedInstanceState) { android:id="@+id/tvHelloText" super.onCreate(savedInstanceState); android:layout_width="wrap_content" setContentView(R.layout.mainlayout); android:layout_height="wrap_content" android:layout_centerHorizontal="true" } android:layout_centerVertical="true" } android:text="Hello Word" /> </RelativeLayout>
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Android

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Android

  • 2. Objective Find the Answer of fallowing What is Android ? Android Architecture ? Development Tools ? Basic building Block of Android Applicaton ? Hello World Application.
  • 3. What is Android ? Android is a Software platform for mobile devices. Based on Linux operation system Develop by Google and (OHA)
  • 4. Version history Android 1.0(Beta)-5 November 2007 Android 1.0-23 September 2008 Android 1.1- 9 February 2009 Android 1.5 Cupcake-30 April 2009 Android 1.6 Donut-15 September 2009 Android 2.0/2.1 clair-26 October 2009 Android 2.2.x Froyo-20 May 2010 Android 2.3.x Gingerbread-6 December 2010 Android 3.x Honeycomb-22 February 2011 Android 4.0.x Ice Cream Sandwich-19 October 2011 Android 4.1/4.2 Jelly Bean-27 June 2012*
  • 5. Android Features Application Framework Dalvik virtual machine Integrated (webkit) browser 2D and 3D graphics APIs with HW SQLite Video and audio codecs Bluetooth, EDGE, 3G, and WiFi Camera, GPS, compass, and accelerometer
  • 8. Basic building Block of Android Applicaton Activities-An activity is usually a single screen that the user sees Intents-Intents are messages that are sent among major building blocks Services-Services run in the background and dont have any user interface components. Content Providers-Content Providers are interfaces for sharing data between applications. Broadcast Receivers-Global event events SMS arrives, or call comes in, or battery runs low etc..
  • 9. Hello World Application Mainlayout.xml public class MainActivit extends <RelativeLayout Activity { xmlns:android="http://schemas.android.com/apk/re s/android" xmlns:tools="http://schemas.android.com/tools" private TextView mEmpName; android:layout_width="fill_parent" @Override android:layout_height="match_parent"> protected void onCreate(Bundle <TextView savedInstanceState) { android:id="@+id/tvHelloText" super.onCreate(savedInstanceState); android:layout_width="wrap_content" setContentView(R.layout.mainlayout); android:layout_height="wrap_content" android:layout_centerHorizontal="true" } android:layout_centerVertical="true" } android:text="Hello Word" /> </RelativeLayout>