public void finalize() {
active = false;
INSTANCE = null;
SensorBus.getInstance().unsubscribe(this);
if(featureRunner!= null && featureRunner.isAlive()) {
featureRunner.stop();
}
featureRunner= null;
Log.d(TAG, "Destroyed FeatureCalculation");
}
private FeatureCalculation() {
active = true;
SensorBus.getInstance().subscribe(this);
}