Android Sensing Tutorial Hasan Faik Alan 9/7/2017 Example Android - - PowerPoint PPT Presentation

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Android Sensing Tutorial Hasan Faik Alan 9/7/2017 Example Android - - PowerPoint PPT Presentation

Jul 17, 2023 244 likes •584 views

Android Sensing Tutorial Hasan Faik Alan 9/7/2017 Example Android Device CPU : Quad-core 2.5 GHz Krait 400 GPU : Adreno 330 Development - Getting Started http://developer.android.com/develop/ Development - Getting Started

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Android Sensing Tutorial

Hasan Faik Alan

9/7/2017

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Example Android Device

CPU : Quad-core 2.5 GHz Krait 400 GPU : Adreno 330

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Development - Getting Started

http://developer.android.com/develop/

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Development - Getting Started

  • Download Android SDK
  • Create “Hello, World!” application
  • Get an Android Device
  • Sign up for a developer account

http://developer.android.com/develop/

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Android Sensing

Funf Journal: Android Data Collection App http://www.funf.org/

  • Extensible: can be extended to collect any

information that Android OS allows to access

  • Collected data are stored in SQLite databases
  • Sensitive data (e.g., phone numbers, text

messages) are hashed before storing them

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Android Sensor API

http://developer.android.com/reference/android/hardware/SensorManager.html

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Sensor Coordinate System

http://developer.android.com/guide/topics/sensors/sensors_overview.html#sensors-coords

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Example Sensor Data

1|MPU6500 Acceleration Sensor| [-1.6741456,9.370906,2.6886885]|1441670212915 1|AK09911C Magnetic field Sensor| [16.86,-64.26,-62.7]|1441670213400 1|MPU6500 Gyroscope Sensor| [-0.02263687,-0.016777916,-0.008788432]|1441670213508

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Example Sensor Data - GPS

{ "mProvider": "fused", "mLatitude": 40.748431, "mLongitude": 73.985741, "mTime": 1441575797954, "mAccuracy": 29.0, "mAltitude": 83.0, "mSpeed": 0.0, "mBearing": 0.0, ... }

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Example Sensor Data - WiFi

{ "BSSID": "00:21:6c:87:02:d1", "SSID": "eduroam", "capabilities": "[WPA2-EAP-CCMP]", "frequency": 2462, "level": -82 }

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Accelerometer

At rest

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Accelerometer

Rotation around y axis

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Accelerometer

Physical Activity Level Inference

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Example Applications

Sensor Log WiFi Indoor Localization

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Activity Recognition Study

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Activity Recognition Study

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Activity Recognition Study

Running

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In Vehicle

Activity Recognition Study

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Activity Recognition Study

Walking Running In Vehicle

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Android “DetectedActivity” API

https://developers.google.com/android/reference/com/google/android/gms/location/DetectedActivity

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WiFi Localization Study

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Example WiFi Scan Data

{ "BSSID":"00:21:6c:87:02:d1", "SSID":"eduroam", "capabilities":"[WPA2-EAP-CCMP]", "frequency":2462, "level":-82 }

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WiFi Localization Study

WiFi Fingerprints

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WiFi Localization Study

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WiFi Indoor Localization

WiFi Indoor Localization

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WiFi Indoor Localization

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WiFi Indoor Localization

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Crowdsourced WiFi/GSM Databases http://opencellid.org/

"OpenCelliD aims to document all Cell Towers and WiFi APs around the world along with their locations. This database of Cell Towers is built by the community and is free available for download or use via an API."

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Crowdsourced WiFi/GSM Databases http://opensignal.com/

"We produce coverage maps for mobile operators in over 200 countries based on data crowdsourced from millions of users of the OpenSignal"

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Questions?

Thank you.