Second Progress Seminar 2013 The main objective of this project is to connect different people that are in the range of same Wi-Fi access point. This will be completely free and no external source of internet will be needed. The chat will be public, means messages will be broadcasted to every user that is connected. This application will be developed in the Java programming language using the android software development kit(SDK).The development platform or integrated development environment(IDE) is eclipse using the android development tools(ADT) Plug-in. We will develop an application where user does not need any web browser to chat with other user. It has its own user interface. The user can connect to any available Access Point for chat with another user connected with same access point. Tethering and portable hotspot utility available on android can also be used for creating an access point. User Datagram Protocol (UDP) is used for sending the packets across the network.

1. BOSCOBOSCOCHATCHAT
(A Wi-Fi Chat Room)(A Wi-Fi Chat Room)
Android ApplicationAndroid Application
Prepared By :
Name : Dhrubajit Das
Roll no: DC2011MCA0003
Name : Samaresh Debbarma
Roll no: DC2011MCA0034
Guide : Mr. Pranab Das , Asst.Prof(DBCET)

2. ContentsContents
Objective
Introduction
UML Diagrams
Use Case Diagram
Activity Diagram
Class Diagram
Conclusion
References

3. ObjectiveObjective
The main objective of this project is
 To connect different people that are in the range of same Wi-Fi
access point.
 This will be completely free and no external source of internet
will be needed.
 This application will be developed in the Java programming
language using the android software development kit(SDK).
 The development platform or integrated development
environment(IDE) is eclipse using the android development
tools(ADT) Plug-in.

4. IntroductionIntroduction
“BOSCO” is a name extracted from the full name Don Bosco, The
Founder of selesian congregation,
and “CHAT” which basically means chatting.
The chat messages sent are of two types:
1.Public Chat Messages(within a room)
2.Private Chat Messages(peer to peer)

5. 5
UML DiagramUML Diagram –– What is UML?What is UML?
The Unified Modeling Language (UML) is a standard language
for
Specifying Visualizing Constructing Documenting
Business Modeling Communications

6. Use case diagramUse case diagram
UML Use cases diagrams describes the behavior of the
target system from an external point of view. Use cases
describe "the meat" of the actual requirements.
 Use cases. A use case describes a sequence of actions
that provide something of measurable value to an actor
and is drawn as a horizontal ellipse.
 Actors. An actor is a person, organization, or external
system that plays a role in one or more interactions with
your system. Actors are drawn as stick figures.
 Associations. Associations between actors and use cases
are indicated by solid lines. An association exists whenever
an actor is involved with an interaction described by a use
case.

7. Fig : BoscoChat Use Case DiagramFig : BoscoChat Use Case Diagram

8. Activity DiagramActivity Diagram
Activity diagram is another important diagram in UML to describe dynamic
aspects of the system.
Activity diagram is basically a flow chart to represent the flow form one
activity to another activity. The activity can be described as an operation
of the system.
The control flow is drawn from one operation to another. This flow can be
sequential, branched or concurrent. Activity diagrams deals with all type
of flow control by using different elements like fork, join etc.
So the purposes can be described as:
 Draw the activity flow of a system.
 Describe the sequence from one activity to another.
 Describe the parallel, branched and concurrent flow of the system.

9. Fig : BoscoChat Activity DiagramFig : BoscoChat Activity Diagram
yes

10. 10
What is a Class Diagram?What is a Class Diagram?
A Class Diagram is a diagram describing the
structure of a system shows the system's
classes
Attributes
operations (or methods),
Relationships among the classes.

11. ConclusionConclusion
BOSCO CHAT (A Wi-Fi Chat Room in Android) is a new approach
for local communications in mobile world.
 Wi-Fi proximity is a main idea behind Wi-Fi chat. If you and your
potential pal can see at this moment the same Wi-Fi access point
(Wi-Fi network) than it is very probably that you can see each
other.
 In other words, it is very likely that you are close to each other.
Close in the geographical sense, of course.
So, BOSCO CHAT Lets you create discussions (forums) associated
with Wi-Fi access points. It is yet another way to create hyper-
local group messaging.

12. ReferencesReferences
1. http://developer.android.com
2. M. Fengsheng Yang, Android Application Development Revelation,
ChinaMachine Press, 2010.
3. Mark L. Murphy, Beginning Android, Springer Verlag New York, Inc., 2010.
4. http://vidhatha.com/android-projects/: Project Overview
5. D. Muthukumaran et al., Measuring Integrity on Mobile Phone Systems,
Proc.13th ACM Symp. Access Control Models and Technologies, ACM
Press, 2008,pp. 155 –164.
6. Fiawoo, S.Y., Design and development of an Android application to
process anddisplay summarized corporate data, Adaptive Science &
Technology (ICAST),2012 IEEE 4th International Conference, 25-27 Oct.
2012,PP 86-91