Andromeda: An Android Framework for Sensor-based Applications

Thursday, October 29, 2009

DroidCon '09, Dahlem Cube, Berlin - Germany

AndromedaAn Android Framework for Sensor-based Applications


sábado, 19 de novembro de 11



Outline• Overview• Andromeda Project

Features Architecture Benefits & Limitations Roadmap






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






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






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






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 ”






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) ‏








SensorFrameworkregisterListener(…) and unregisterListener() ‏

SensorAdapterFactorySensorAdapter createAdapter(SensorManager sensorManager) ‏

SensorEventListenerAdapterSensorListenerAdapter

SensorListenerAndroid 1.1

SensorEventListenerAndroid 1.5

Services Broadcast Receiver Activities

Andromeda Architecture

SensorAdapter <Abstract Class>

Client




The Big Picture



Hardware Sensors

Android OS

Andromeda Framework

Applications Framework

Client

via getSystemService()‏

implements SensorListener

Notify Client “onChange()”

notifies sensor events

onSensorChanged()‏




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






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






Roadmap• More human gesture detection:

– Ex: turn over, double shake, etc

• Sensor callibration relatively to the underlying androphone






Do you want to know more about Andromeda?

Andromeda Project TeamMarcelo Alves

[email protected]

Ramon [email protected]

Stefano [email protected]




mailto:[email protected]










WE HOPE YOU ENJOY AND THANKS FOR LISTENING!




Andromeda: An Android Framework for Sensor-based Applications

Technology

dahlem cube

development of sensor

andromeda project andromeda

sensorbased apps

sensorbased applications

sensor callibration

sensor simulatorusing

andromeda framework