Andromeda: An Android Framework for Sensor-based Applications

Andromeda
An Android Framework for
Sensor-based Applications

Thursday, October 29, DroidCon '09, Dahlem Cube, Berlin -
2009 Germany

sábado, 19 de novembro de 11

Outline
• Overview
• Andromeda Project
 Features
 Architecture
 Beneﬁts & Limitations
 Roadmap

2009 Germany


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

2009 Germany


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

2009 Germany


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

2009 Germany


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 ”
2009 Germany


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)‫‏‬

2009 Germany


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
2009 Germany


The Big Picture
Notify Client “onChange()”
Andromeda
Client
notifies sensor events Framework

Applications
via getSystemService()‫‏‬ Framework
implements SensorListener
onSensorChanged()‫‏‬

Android OS

Hardware Sensors

2009 Germany


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
2009 Germany


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

2009 Germany


Roadmap
• More human gesture detection:
– Ex: turn over, double shake, etc

• Sensor callibration relatively to the
underlying androphone

2009 Germany


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
2009 Germany


WE HOPE YOU ENJOY AND
THANKS FOR LISTENING!

2009 Germany


Andromeda: An Android Framework for Sensor-based Applications

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