android_tutorial_teleop null pointer exception on contact

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Installing and building rosjava and rosjava.android successful. After installing android_tutorial_teleop to my tablet, I run it and connect to another machine running a roscore. It connects successfully, shows up in the topic list and rxgraph. It handles normal touch events just fine, moving the little triangle around, however when you touch the joystick it throws a null pointer exception. This problem has persisted for me using 3 different machines, over several versions of rosjava.android. Full error is posted below. Has anyone else encountered this issue, or know of any suggestions for debugging? I have tried playing with virtualJoystickView to try to track down what the issue is, but have been unsuccessful.

Full Step: Follow instructions for installing and Building rosjava_core and android_core adb install MainActivity-debug.apk run on tablet, enter ip address for machine with roscore touch joystick

E/AndroidRuntime( 9030): FATAL EXCEPTION: main
E/AndroidRuntime( 9030): java.lang.NullPointerException
E/AndroidRuntime( 9030):    at org.ros.android.view.VirtualJoystickView.publishVelocity(VirtualJoystickView.java:799)
E/AndroidRuntime( 9030):    at org.ros.android.view.VirtualJoystickView.onContactMove(VirtualJoystickView.java:698)
E/AndroidRuntime( 9030):    at org.ros.android.view.VirtualJoystickView.onTouchEvent(VirtualJoystickView.java:356)
E/AndroidRuntime( 9030):    at android.view.View.dispatchTouchEvent(View.java:5546)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1951)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1712)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:1957)
E/AndroidRuntime( 9030):    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:1684)
E/AndroidRuntime( 9030):    at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1912)
E/AndroidRuntime( 9030):    at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1371)
E/AndroidRuntime( 9030):    at android.app.Activity.dispatchTouchEvent(Activity.java:2364)
E/AndroidRuntime( 9030):    at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1860)
E/AndroidRuntime( 9030):    at android.view.View.dispatchPointerEvent(View.java:5726)
E/AndroidRuntime( 9030):    at android.view.ViewRootImpl.deliverPointerEvent(ViewRootImpl.java:2890)
E/AndroidRuntime( 9030):    at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2466)
E/AndroidRuntime( 9030):    at android.view.ViewRootImpl.processInputEvents(ViewRootImpl.java:845)
E/AndroidRuntime( 9030):    at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2475)
E/AndroidRuntime( 9030):    at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 9030):    at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 9030):    at android.app.ActivityThread.main(ActivityThread.java:4424)
E/AndroidRuntime( 9030):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 9030):    at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 9030):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
E/AndroidRuntime( 9030):    at com.android.internal.os ...