This document discusses an Android application for a Sudoku game and its relation to the Android operating system. It first defines Android as a software stack including an OS, middleware and apps. It then explains that an Android app is designed to run on Android devices like smartphones and tablets. It describes the Sudoku game app the presenter created for Android, including difficulty settings and options for sounds and hints. It outlines the four layers of the Android OS - the Linux kernel, libraries and runtime, application framework, and applications. It discusses how the Sudoku app uses specific libraries and components from the Android framework like SQLite for data storage, the 2D graphics library, and the activity manager.

1. Android Application
And
It’s Relation with
Android Operating System
Presented By:
MD: Atibur Rahman

2. What is Android
&
Android Application
Android:
Android is a software stack for mobile devices that includes an operating system,
middleware and key applications.
Android Application:
An Android app is a software application running on the Android platform. Because the
Android platform is built for mobile devices, a typical Android app is designed for a
Smartphone or a tablet PC running on the Android OS.

3. Android Application
Everyone must have heard about Sudoku game. For android I have tried to make that
game. You can play the game in different difficulties. I have added settings for this
game. There any user can choose whether he wants sound and hints or not.

4. Android Operating System
There is four layer in android
Operating System and they are-
Linux Kernel
Libraries and Android Runtime
Application Framework
Applications

5. Sudoku’s Connection with Android Operating
System
Let’s talk about the Libraries that has been used in Sudoku. For Sudoku game I needed a 2D Graphics.
In android libraries there is a 2D graphics provider named SGL. If we need to use 2D graphics we
need to call SGL.
• import android.graphics.Canvas;
• import android.graphics.Paint;
SQLite: As I have to save the game, I need a data storage. SQLite provides the data storage that we
need for the application.

6. DALVIK VIRTUAL MACHINE:
It is extremely low-memory based virtual machine, which was designed especially for Android to run on embedded
systems and work well in low power situations.
I had to check my program before taking it to any phone and see if it is working perfectly. DVM gives us the
support to run our application virtually.
Core Libraries:
The core library contains all of the collection classes, utilities, IO, all the utilities and tools that you’ve come to expected to use.

7. Application Framework
For my Sudoku game I needed to use some features from application framework of android operating system.
View System:
Used to build an application, including lists, grids, text boxes, buttons, and embedded web
browser.
Resource Manager :
Providing access to non-code resources (localized strings, graphics, and layout files).
Activity Manger:
Managing the lifecycle of applications and providing a common navigation back stack.

9. This is a activity.

10. This is a pop up window in
another activity.

11. Thank You
Any Questions?