Workaround for random crashes running tests on Android 4.3 emulator.

            rotate_by += 360.0f;

        // view.animate() modifies the view's rotation attribute, so it ends up equivalent to view.setRotation()

        // we use rotationBy() instead of rotation(), so we get the minimal rotation for clockwise vs anti-clockwise

        if( main_activity.is_test && Build.VERSION.SDK_INT <= Build.VERSION_CODES.JELLY_BEAN_MR2 ) {

            // We randomly get a java.lang.ArrayIndexOutOfBoundsException crash when running MainTests suite

            // on Android emulator with Android 4.3, from deep below ViewPropertyAnimator.start().

            // Unclear why this is - I haven't seen this on real devices and can't find out info about it.

            view.setRotation(ui_rotation);

        }

        else {

            view.animate().rotationBy(rotate_by).setDuration(view_rotate_animation_duration).setInterpolator(new AccelerateDecelerateInterpolator()).start();

        }

    }

    public void layoutUI() {

        layoutUI(false);