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1. Project Supervisor Mijanur Rahman Lecturer Department of CSE
Bangladesh University of Business & Technology Team Member:
Ahammad Karim ID: 10112203030, Intake- 8th, Sec- 1 Md. Raqibul
Hasan ID: 10112203007, Intake- 8th, Sec- 1
3. Introduction Smart phones and PDA have become increasingly
powerful in recent years. Dramatic breakthroughs in processing
power along with number of extra features include in these devices
have opened the doors to a wide range of commercial possibilities.
Our project motivation is to convert physical currency to virtual
currency by developing a smart phone application especially for
Bangladesh. By using this app people can send or receive digital
currency to another people who using these apps.
4. Objectives of the Project The prime objective of Mobile
Payment System using near field communication is to develop a full
fledged Android application which could able to send or receive
virtual money. Significantly reduce the use of physical money
Cashless purchasing in Bangladesh retail and other outlets, as well
as a means to store and transfer money. Make user final transaction
more inclusive and provide financial services to the unbanked
segment of population. Transaction made without internet
5. Academic Objectives Learn the process of the mobile
application development. Understand how Android applications work,
their life cycle, Design and develop useful Android applications
with compelling user Learning Android's APIs for data storage,
retrieval, user preferences, files, databases, and content
providers Utilize the power of background services, threads, and
notifications. Finally, develop a mobile payment system for android
platform.
6. Technology Platform Mobile Platform : Android Application
development framework : Android Developing language : Java User
Interface Language: XML Android API level : 10 and above. Database
: Sqlite Near Field Communication Medium: Bluetooth
7. Reason for Choosing Android Android is open source All
development tools for android is free Development is possible most
OS platform where iOS development is possible only on MAC and all
tools are not free. Most of the smart phone users in Bangladesh are
using Android since to reach maximum users we choose android as app
development platform. Huge resource available
8. Android Architecture
9. Android Application Components Activities visual user
interface focused on a single thing a user can do Services no
visual interface they run in the background Broadcast Receivers
receive and react to broadcast announcements Content Providers
allow data exchange between applications
10. Application Feature Overview Enabling Bluetooth Enabling
Bluetooth visibility Scan for other Bluetooth devices Query the
local Bluetooth adapter for paired Bluetooth devices Establish
RFCOMM channels Searching Bluetooth device in Bluetooth range Make
Bluetooth connection with another android device holding this apps.
Send or receive BDT currency amount to another device holding this
apps. Managing Wallet Accounts Viewing Transaction History Secured
Transaction
11. Application High Level Design
12. Why Bluetooth in our application? Bluetooth is a wireless
technology standard for exchanging data over short distances We use
Bluetooth in this wallet application as Near Field Communication
(NFC) medium because of the absence of NFC chip in all android
device. On the other hand Bluetooth is available in all different
manufacturer android device. Bluetooth is the heart of this
application. Every transaction made by this wallet application is
done through Bluetooth. During connection establishing among two
devices, one is act as server and another is client. Encrypted
Bluetooth connection is made for secure transaction.
13. Implementation Required tools and software to develop
Mobile Payment System application are mentioned below: Java
Standard Edition (SE) 7 or above Eclipse ADT (Android Developer
Tools) Bundle Android powered device for app running and debugging
Device driver Database Implementation: Sqlite using
SqliteOpenHelper Android API
14. Methodology
15. Typical Transaction Flow Diagram
16. Transaction Subsystem by use case diagram
17. Application Snapshots This chapter highlights the results
of the project & the snapshots for each of the activities are
shown along with the discussion of each activity describing its
working. Each snapshot describes every single step of the Mobile
Payment System Application. Four main activities as well as the
options provided to the users in each activity such as menu options
and the activities which are created on the click are also shown
and described in brief.
18. Snapshot The red marked icon represent the Mobile Payment
System Application, on clicking it would open the application which
result the creation of the main activity.
19. Snapshot (continued) This is the first screen or activity
of the project output. If Bluetooth is turned off application
prompt user to enable Bluetooth. If Bluetooth is already enabled
Bluetooth permission request is not appeared.
20. Snapshot (continued) After app main activity launched if
user click menu button of device the red marked menu will appeared
in the screen. By selecting menu user can go individual
activity.
21. Snapshot (continued) If device is not visible to other
device user can enable visibility for certain period by clicking
make discoverable button from menu.
22. Snapshot (continued) After clicking connect a device of
menu the following device list activity appeared in the screen. The
figure showing paired devices list. User can search device by using
name. If user select a device for connect, the application attempt
to connect with that device. Note that, the target device should be
in Bluetooth range and the app should be open on that device. The
activity has some other feature which described later.
23. Snapshot (continued) In device list activity, there is an
option for scanning new device which are not paired before. In
figure, when user click red marked scan for devices then
application scan new device in Bluetooth range. After scanning, if
device is found then the device list will show under scan for
devices button. If user click any devices, application attempt to
connect with that device by exchanging pair key which ensure
connection security among device.
24. Snapshot (continued) After successful connection the
connected device name is showing in red marked area and both device
are ready for making transaction.
25. Snapshot (continued) This is the figure after receiving
currency. The currency amount, device name, date time are showing
in main activity. The wallet balance is updated automatically.
26. Snapshot (continued) This is the transaction history
activity. This activity mange wallet account and show all
transaction as list view.
27. Snapshot (continued) This is simple activity which show
project supervisor name and team members name.
28. Snapshot (continued) When user press back button from main
activity then application prompt user by alert . It is useful
because sometimes user accidently press back button then this alert
will prevent exit the application.
29. Strength of the System Internet or other type of network
access is not required for making transaction Secured encrypted
Bluetooth connection is made during transaction. Extra technical
knowledge is not required to operate the system.
30. Evaluation There are some limitations in this system. Thats
are 1. How the digital currency will authorized by following
government law that is not addressed. 2. If device will destroy or
stole then how user will claim money that is not addressed. 3. Most
of the people of Bangladesh in illiterate. Reaching illiterate
people is challenge. 4. For more secure transaction NFC enabled
phone is best but lack of availability of NFC tag in all device we
use Bluetooth classic technology as medium of NFC. 5. Application
is only Android OS depended. So other mobile platform user cant
take benefit from this application.
31. Future Work Adaption of different online payment system
Develop a centralized system to back up user transaction record. If
people lost device or system crash than user can claim wallet
balance to retrieve. Convert the transaction system by using NFC
tag for keeping transaction more secure.
32. Learning from the project Android App development
fundamental Familiarity with Eclipse Integrated Development
Environment (IDE) Java programming Language basic Use of xml for
layout definition Use of mysqlite for database management in
android Android apps running and deployment Different technique of
debugging android application
33. Conclusions The project exposed us to the latest technology
in the area of mobile platform development. Thus, this project
successfully demonstrated a mobile based payment system Where
Bluetooth is used as Transaction medium. We faced many challenges
and problem during the development time. It was a nice learning
curve to work on Android application development. We are grateful
to the Allah, the Almighty, the Merciful without whose patronage
and blessing this project would not been successfully completed. We
also acknowledged with great thanks to our project supervisor Md.
Mijanur Rahaman for his most valuable suggestions & co-
operations.