LambdaMC

A demo Haskell Android app to calculate option prices by Monte Carlo simulation. Based on the example app at https://github.com/neurocyte/android-haskell-activity

Functionality is limited, but it may be a useful reference for anybody developing a Haskell Android app:

• Android Pause / Resume functionality.
• Screen Rotation support.
• Background worker thread updates the UI when the calculation is complete.
• Interaction between various Android UI elements and Haskell code.

Google Play listing: https://play.google.com/store/apps/details?id=org.dragongate_technologies

Files

• LambdaMC.hs : Haskell app code
• DgAndr.hs : Haskell wrapper for various Android library functions
• DgMath.hs : Haskell option pricing code
• LambdaMC.java : Minimal Java code to support the main Activity
• LicenseActivity.java : Java Activity to display license information (need to move more code to Haskell-land)

Prerequisites

1. An Android cross-compiler built with the ghc-android tool at https://github.com/neurocyte/ghc-android
2. The foreign-jni package from https://github.com/neurocyte/foreign-jni
3. The Haskell packages base, deepseq, transformers, mtl, text, time

Building

./build_workaround.sh ( to work around the -shared and -r issue described at neurocyte/android-haskell-activity#3 )

Install

sudo adb install -r bin/LambdaMC-debug.apk