1. A MAJOR PROJECT SYNOPSIS
ON
WI-FI CHAT ROOM
IN ANDROID
Submitted By
Shitanshu Bansal (09563)
Rajat Tiwari (09535)
Muneesh (09537)
Pankaj Jaldeep (09544)
Under the guidance of
Dr. Narottam Chand
Department of Computer Science and Engineering
National Institute of Technology, Hamirpur (H.P.)
November, 2012

2. Page 1
ABSTRACT
The term chat room is primarily used by mass media to describe any form of
synchronous conferencing, occasionally even asynchronous conferencing. Often mobile
users want to have a meeting, even though it is not planned in advance and there is no
Internet connection available. In those situations, requiring each user to connect to a
wide-area network to communicate with each other may not be convenient or practical
because of the lack of Internet connectivity. In those situations the “Wi-Fi Chat Room”
would help the employees to send and receive the information which the employees want
to share. This application is based on “Android Operating system”. The main objective of
this project is to connect different people that are in the range of a same Wi-Fi access
point. This application is 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) Plugin.
We have developed 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 & 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.

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INTRODUCTION
With the availability of mobile computing devices, mobile users have a natural tendency
to share information between them. Often mobile users want to have a meeting, even
though it is not planned in advance and there is no Internet connection available. For
instance, there may be situations that employees find themselves together in a meeting
room, or friends or business acquaintances may encounter each other in an airport
terminal, or some scholars and researchers may meet in a hotel ballroom for a conference
or workshop. In those situations, requiring each user to connect to a wide-area network to
communicate with each other may not be convenient or practical because of the lack of
Internet connectivity or because of the time or cost required for such a connection.
So, in those situations the “Wi-Fi Chat Room” would help the employees to send
and receive the information whit the employees want to share. This application will be
based on “Android Operating system”. The chat messages sent are of two types:-
1. Public Chat Messages
2. Private chat Messages
Public messages are delivered to all other chat clients nearby, while private
messages are directed to a specific recipient. As in most chat applications, there is no
history and clients do not expect to receive messages sent earlier or when disconnected.
Disconnection can occur at any time while clients are exchanging messages.

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OBJECTIVES
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.
ANDROID EMULATOR

5. Page 4
THREE USERS IN CHAT ROOM
REFERENCES
[1] http://developer.android.com/guide/topics/fundamentals.html/: OL. Google
Android Developers, Android Develop Guide.
[2] M. Fengsheng Yang, Android Application Development Revelation, China
Machine Press, 2010.
[3] Mark L. Murphy, Beginning Android, Springer-Verlag New York, Inc., 2010.
[4] http://developer.android.com/guide/components/index.html/: Android
Components.

6. Page 5
[5] http://vidhatha.com/android-projects/: Project Overview
[6] http://developer.android.com/reference/java/net/DatagramPacket.html: Datagram
Packet Class
[7] http://developer.android.com/reference/java/net/InetAddress.html: InetAddress
Class
[8] http://developer.android.com/reference/android/app/NotificationManager.html:
NotificationManager Class
[9] http://developer.android.com/reference/java/net/DatagramSocket.html: Datagram
Socket Class
[10] http://developer.android.com/reference/android/net/wifi/WifiManager.html: Wi-Fi
Manager Class
[11] http://developer.android.com/reference/android/net/wifi/WifiInfo.html: Wi-FiInfo
Class
[12] 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.
[13] Fiawoo, S.Y., Design and development of an Android application to process and
display summarized corporate data, Adaptive Science & Technology (ICAST),
2012 IEEE 4th International Conference, 25-27 Oct. 2012, pp. 86 – 91.