1.Android OS :
Android is an operating
system based on Linux with a Java programming interface.
Android is from
Google. Android is developed by Google
and later the Open Handset Alliance (OHA)
Code name
| Version number | Initial release date | API level | ||
|---|---|---|---|---|
| Alpha | 1.0 | September 23, 2008 | 1 | |
| Beta | 1.1 | February 9, 2009 | 2 | |
| Cupcake | 1.5 | April 27, 2009 | 3 | |
| Donut | 1.6 | September 15, 2009 | 4 | |
| Eclair | 2.0 – 2.1 | October 26, 2009 | 5 – 7 | |
| Froyo | 2.2 – 2.2.3 | May 20, 2010 | 8 | |
| Gingerbread | 2.3 – 2.3.7 | December 6, 2010 | 9 – 10 | |
| Honeycomb | 3.0 – 3.2.6 | February 22, 2011 | 11 – 13 | |
| Ice Cream Sandwich | 4.0 – 4.0.4 | October 18, 2011 | 14 – 15 | |
| Jelly Bean | 4.1 – 4.3.1 | July 9, 2012 | 16 – 18 | |
| KitKat | 4.4 – 4.4.4 | October 31, 2013 | 19 | |
| Lollipop | 5.0 – 5.1.1 | November 12, 2014 | 21 – 22 | |
| Marshmallow | 6.0 – 6.0.1 | October 5, 2015 | 23 | |
| Nougat | 7.0 – 7.1.1 | August 22, 2016 | 24 – 25 |
2.
Android Components :
1. Activity
2. Views & Viewgroups
3. Intents
4. Services
5. Content Provider
6. Sqlite DB
7. Shared Preference.
What is the Open Handset Alliance (OHA)?
→ It's a consortium of
several companies
Android Development Tools & Softwares
1. Install Java 5 / 6 / 7
2. Install Eclipse IDE 3.7 , Indigo
3. Install Android SDK
4. Install ADT Eclipse plug-in
5. Android Emulator –
Android Virtual Device (AVD) Creation
APK File:
Android Architecture
Views & View Groups
Import android.widget.*;
View classes : View
Group Classes :
1. Button 1. Linear Layout
2. Textview 2. Relative Layout
3. checkbox 3. Frame Layout
4. Edittext 4. Table Layout
5. RadioButton 5. Tab Layout
6. imageview 6. Gridview
7. Toast 7. Listview
8. Gridview ....
9. Listview
10. Datepicker Interfaces :
Important Packages in Android
1. android.widget.*;
2. android.app.*;
3. android.view.*;
4. android.content.*;
5. android.location.*;
6. android.opengl.*;
7. android.media.*;
8. android.database.*;
……………………….. And so on
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