My first Android development experiment, so don't expect anything nice here. It needs some work to be fully a proper Android app.
Essentially, this is a little instrument tuner and little game to practice your scales, including feedback.
With ANDROID_HOME
set to the location of the sdk and
JAVA_HOME
set to the jdk, connect your debug enabled phone and type:
ant debug && ant installd
These are the two interesting activities
.. and a scale practice activity showing a histogram of how far off you are for certain notes and gives you a final score.