Mensa+

End Presentation

Application Scenario

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Mensa Application

• check mensa traffic

• check menu

• edit food preferences

• (in the future) check card balance

Current Result

Main Screen

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SidebarMain Screen

Current Result

Check-in function

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Not in a canteenChecked-inGPS available?

Current Result

User Preferences

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AppliedSet Preferences

Architecture

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OpenMensaAPI

SQLiteDB

Request via URL

JSON-Object

locate

Read and write userpreferences

JSON-Object

Technologies

• Android SDK

• OpenMensa API

• Location:

• Google Play Services

• File Storage:

• JSON

• SQLite

• Rest API

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Challenges

• Usability Challenge

• clean intuitive user interface

• checking in automatically opens the respective menu

• Connectivity Challenge

• Down-/Uploading only small JSON Files

• Energy Challenge

• GPS usage only on demand using an Floating Action Button

disabled completly on low battery

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Adaptation example – User Preferences

• User sets his preferences

Meal Activity hidesunwanted meals

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Adaptation example – BatteryManager

• User has low battery

GPS function is disabled

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Open Tasks Lessons learnt

• tackle Offline challenge

• cache menues

• implement NFC

functionality

• improve accuracy of

canteen capacities

• Introduction into Android

development

• appreciate StackOverflow

• Time management is hard

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Thank you for your attention.