1. Walk n’ Play Group #8 - Team Murali Krishna Goli Viswanath Patimalla
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Walk n’ Play
Group #8 - Team
Murali Krishna Goli
Viswanath Patimalla
Sivarama Krishna Polamraju

2. Instructor: Dr. Said Bettayeb
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Instructor: Dr. Said Bettayeb
Mentor : Dr. Pradeep Buddharaju

3. Agenda Android Motivation Introduction Features How it Works
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Android
Motivation
Introduction
Features
How it Works
Software & Hardware Requirements
Technical Details
Demo
Conclusion

4. Android Open software platform for mobile development.
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Open software platform for mobile development.
Developed by Google.
A complete stack – OS, Middleware, Applications.
An Open Handset Alliance (OHA) project.
Fast application development in Java.
Open source under the Apache 2 license.

5. Why Android..? Budget. Hardware choice. Usability.
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Budget.
Hardware choice.
Usability.
Customizable home screen.
User base.
No License fee.

6. Motivation Smart Phones. Millions of mobile users. Health awareness.
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Smart Phones.
Internet access anywhere.
Social networking.
GPS and Google Maps.
Millions of mobile users.
Health awareness.

7. Note: Physical Activities had some conditions.
Introduction
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Walk n’ Play is a mobile application built for all devices having Android operating system and Accelerometer sensor.
This application provides accurate calories count that burnt against the physical activity based on cutting edge calorie calculation technology, which uses the accelerometer in the device.
Note: Physical Activities had some conditions.

8. Features Tracking amount of calories burnt.
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Tracking amount of calories burnt.
Compete with the intelligent simulator.
Play walking game.
Avatars.
Comparing performance with other users.
Options.
Swarm Leaderboard.
Power saver mode.

9. How it Works Installing the App. Registration. Start Using.
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Installing the App.
Registration.
Start Using.

10. How it Works Name. Weight. Gender. Position of the device on the body.
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Name.
Weight.
Gender.
Position of the device on the body.

11. How it Works
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flow diagram

12. Algorithm
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University of Houston Main Campus Researchers from Computational Physiology Lab developed this algorithm.
Using this algorithm, we calculated an equation which turns the accelerometer readings into calorie count.

13. Software Requirements
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Android SDK.
Eclipse IDE.
ADT Plugin.
Leaderboard API.
Android Emulator.

14. Hardware Requirements
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Any smart phone with Android OS and internet connection.

15. Activity Lifecycle Activity Launched onCreate() onStart() onRestart()
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Activity Launched
onCreate()
onStart()
onRestart()
onResume()
App process killed
Activity Running
onPause()
onStop()
onDestroy()
Activity shutdown
Fig:2 Activity Life Cycle

16. Accelerometer Sensors Changes in x axis Changes in y axis
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Sensors
TYPE_ACCELEROMETER
TYPE_MAGNETIC_FIELD
TYPE_GRAVITY
getDefaultSensor()
TYPE_LINEAR_ACCELERATION
TYPE_PROXIMITY
registerListener()
TYPE_AMBIENT_TEMPERATURE
TYPE_RELATIVE_HUMIDITY
onSensorChanged()
TYPE_GYROSCOPE
TYPE_ORIENTATION
Changes in x axis
Changes in y axis
Changes in z axis
TYPE_ROATATION_VECTOR
TYPE_PRESSURE
Fig:3 Accelerometer Working Sequence

17. Algorithm yes no Calculate tmp by using Accelerometer Energy
T<10sec
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yes no
Collect twenty x, y ,z coordinates values of the accelerometer for every 50ms
Calculate tmp by using Accelerometer Energy
Calculate Accelerometer Energy
yes
tmp<0 no
kcal=0
No calories burnt
Calculate kcal
Display calories burnt
Fig:4 Algorithm Sequence

18. Swarm Leaderboard API Leaderboard?
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Leaderboard?
Leaderboard keeps tracks of the scores of users of the application.
Why only Swarm API?
Easy to integrate! No confusion.
Ease of use for the general user.
Excellent support provided for the developer.
Displays scores day, week, month wise.

19. Shared Preferences Shared Preferences?
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Shared Preferences?
Provides general framework to save and retrieve data.
Primitive data such as float, booleans, int, longs and strings.
Create shared preference object
Create editor object
Store data and commit object
onPause()
onResume()
Access the shared preference object
Access the editor object
Retrieve stored data
Fig:5 Shared Preferences Sequence

20. Services
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Services?
A service is an application which performs long running operations in the background.
Start a service by calling startService()
onPause()
onResume()
Stop a service by calling stopService()
Retrieve the calorie values using shared preference
Fig:6 Services Working Sequence

21. Services onPause() onResume() onPause() onResume()
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Start a service by calling startService()
onPause()
onResume()
onPause()
onResume()
Stop a service by calling stopService()
Retrieve the calorie values using shared preference
Fig7(a)Without Power Saver
Fig7(b)With Power Saver

22. Walk n' Play Spring CSCI6338

23. Conclusion Very simple to install and use. Easy registration process.
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Very simple to install and use.
Easy registration process.
Accurate calorie count.
Compare the calorie count.
Being designed in the way that it utilizes the device resources efficiently.

24. Future Work Multi device operability by using Cloud to save data.
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Multi device operability by using Cloud to save data.

25. References http://developer.android.com
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Private Communication

26. Walk n' Play Spring CSCI6338
Queries..?

27. Walk n' Play Spring CSCI6338
Thank You