WekaClassifier.java needs to be generated by the Weka Toolkit and copied to: app/src/main/java/com/michaeltroger/activitypredictor/WekaClassifier.java
An example file can be seen as WekaClassifier.java.temp
code is based on Professor Andrew T. Campbell found on http://www.cs.dartmouth.edu/~campbell/cs65/lecture22/lecture22.html and http://www.cs.dartmouth.edu/~campbell/cs65/myruns/myruns_manual.html