This is the ppt is very useful for android beginners

1. Android
Google

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 Éclair-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

6. Android Architecture

7. Development Tools
•Java
•Android SDK
•Eclipse IDE (optional)

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 don’t 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>

10. Out-Put !!