small tip

[niektuytel]

private static final String TAG = ClassName.class.getSimpleName();
i prefer this way so when you rename the file he will as well change.

[niektuytel]

the value of private void updateShowHideMainScreen(boolean zero2One, float value) goes below 0 and that will crack the hide calculation.

add value = Math.max(0.00f, value); so be sure the lowest value is 0