A simple report on how a messaging application functions, how to design, is briefly shown.

1. Introduction:
Messaging apps are apps and platforms that enable messaging, many of which
started around social networking platforms.
Messaging apps each have some of the following features:
 One-to-one chat
 Group chat
 Broadcastlists
 Chatbot
 Smart replies suggested replies to incoming messages provided by
Google's Reply platform
* Our application is one to one and group chat.
Required Software:
 Android Studio
 Firebase
Hardware Requirements :
Application Installation Android enabled GSM/CDMA phone
Internet Connection Required
Version 2.1
Memory 128MB

2. Data Flow Diagram:
Use Case Diagram:
Execute online
features
Messaging
Send message
Manage
friend list
Show Chat
Window
Receive
message
Manage chat
history
User
name
&Passwor
d
Setting time
before system
become idle
Sender

3. E-R Diagram:
Message_Receiver
id
Message text
Message id
Message sender
Communic
ation
Message receivers
Message
receiver id
Receiver id
Message id

4. Sequence Diagram:
Sender Server
Receivers
Insert message
Insert password
[If password is ok]
Authorization is valid
Sent message

5. Activity Diagram:
Sender
Server
Message
Received
Show Message
Success
Show Message
Failure
Input id Check id Send Data
Send Message
Failed
Received Data
Valid User Send Message success
Start
Matchc
h

6. Log In interface:
Messageview:
Messagestoragein Database:

7. RealLife Application:
1. Education purpose
2. Communication Purpose
3. Social Purpose

8. Limitations:
o Open Access
o Unable to share pictures and files.
o Unable to make video or voice call.
Future DevelopmentPossibilities:
-All limitations will be solved
Function Point Calculation:
Info Count Simple Average Complex Count
External
Input
2 2 3 5 4
External
Ouput
1 1 5 7 1
External
Inquiries
0 7 8 9 0
Internal
Logic Files
3 6 7 8 18
External
Logic Files
4 1 5 7 4
Count
Total:27
Function point= count total*[0.65+0.01*sum(fi)]
=27*[0.65+0.01*14]
=21.33
Conclusion:
We made a project about messaging application. Here we can send message one
to one and many to many. With this application certain number of people can
be connected with each other.