This slidedeck was presented during the DroidCon `09 Conference @ Dahlem Cube, Berlin - Germany.

1. Andromeda
An Android Framework for
Sensor-based Applications
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

2. Outline
• Overview
• Andromeda Project
 Features
 Architecture
 Benefits & Limitations
 Roadmap
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

3. Overview
• The development of sensor-based applications can
be considered the new “mobile feature app killer”
• They are used for various applications category:
– Games
– Maps & LBS applications
– Utilities
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

4. Overview
• Developing sensor-based apps can be very cumbersome :
– Sensors data handling is very complex (regarding internal calcula)‫‏‬
• Have to handle the acceletarion and orientation sensors data on X, Y and
Z axes
– There is a lack of development patterns for this kind of apps
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

5. Overview
• Developing sensor-based using Andromeda
Framework:
– The Developer does not need to know detailed information
about the sensor
– It is not necessary to worry about the values of the X, Y
and Z axes
• Andromeda provides a mechanism to detect
movements known by the framework
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

6. Andromeda Project
• Andromeda is being developed as part of our Immersion Course
Program (specialization course on software development).
– Scholarship alliance between academic and business entities.
• Motorola
• CIn-UFPE (Informatics Center at Federal University of Pernambuco)‫‏‬
• C.E.S.A.R (Centro de Estudos e Sistemas Avançados do Recife)‫‏‬
• It is an acronym for Android Motion Effects Detection
Architecture.
• Encourages sensor application development using the Google
Android Platform
• It is a specific framework for sensor-based applications for
Android
• The Andromeda main purpose is:
“ To create an additional layer to ease complex sensor
data handling for client applications ”
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

7. Features
• Support for various Android SDK versions.
– SDK 1.1
– SDK 1.5 (Cupcake)‫‏‬
– SDK 1.6 (Donut)‫‏‬
• Integrated to OpenIntents to connect with the Sensor simulator
using the Android emulator
• Detects the following motion effects:
– Shake to the left
– Shake to the right
– Shake up
– Shake down
• Developed using the main design patterns:
– Observer (Java listeners)‫‏‬
– Factory Method (for Adapters dynamic instantiations)‫‏‬
– Adapter (to support various Sensor API SDK changes)‫‏‬
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

8. Andromeda Architecture
Client
Broadcast
Activities Services
Receiver
SensorFramework
registerListener(…) and unregisterListener()‫‏‬
SensorAdapterFactory
SensorAdapter createAdapter(SensorManager sensorManager)‫‏‬
SensorAdapter <Abstract Class>
SensorListenerAdapter SensorEventListenerAdapter
SensorListener SensorEventListener
Android 1.1 Android 1.5
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

9. The Big Picture
Notify Client “onChange()”
Andromeda
Client
notifies sensor events Framework
Applications
via getSystemService()‫‏‬ Framework
implements SensorListener
onSensorChanged()‫‏‬
Android OS
Hardware Sensors
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

10. Benefits & Limitations
• Benefits:
– Ease of development and increase productivity
for sensor-based applications
– Define a more human-like sensor-based API
– Flexible adaptation for previous and incoming
Android SDK versions support
• Limitations:
– Explosion of combination of human
movements
• Combined movements implies in high complexity
– Number of movements to be detected
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

11. Roadmap
• Supports Java Annotations to eliminate
boilerplate code
• Integration with the Android
Instrumentation API in order to support
automated tests for sensor-based
applications
• Promote Andromeda architecture to support
the Eclipse RCP (Rich Client Platform) Plug-
in Architecture
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

12. Roadmap
• More human gesture detection:
– Ex: turn over, double shake, etc
• Sensor callibration relatively to the
underlying androphone
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

13. Do you want to know more
about Andromeda?
Andromeda Project Team
Marcelo Alves
malves.info@gmail.com
Ramon Rabello
ramon.rabello@gmail.com
Stefano Malinconico
stefanocmalinconico@gmail.com
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11

14. WE HOPE YOU ENJOY AND
THANKS FOR LISTENING!
Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany
sábado, 19 de novembro de 11