get current android orientation

BatteryScanActivity.java

    private int getCurrentOrientation() {
        int rotation = getWindowManager().getDefaultDisplay().getRotation();
        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
            switch (rotation) {
                case Surface.ROTATION_0:
                case Surface.ROTATION_90:
                    return ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
                default:
                    return ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
            }
        } else {
            switch (rotation) {
                case Surface.ROTATION_0:
                case Surface.ROTATION_270:
                    return ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
                default:
                    return ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
            }
        }
    }