Android 소프트키 메뉴 보유 여부 확인

    public boolean hasSoftKeys() {
        boolean hasSoftwareKeys = true;

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            final Display d = getWindowManager().getDefaultDisplay();

            final DisplayMetrics realDisplayMetrics = new DisplayMetrics();
            d.getRealMetrics(realDisplayMetrics);

            final int realHeight = realDisplayMetrics.heightPixels;
            final int realWidth = realDisplayMetrics.widthPixels;

            final DisplayMetrics displayMetrics = new DisplayMetrics();
            d.getMetrics(displayMetrics);

            final int displayHeight = displayMetrics.heightPixels;
            final int displayWidth = displayMetrics.widthPixels;

            hasSoftwareKeys = (realWidth - displayWidth) > 0 || (realHeight - displayHeight) > 0;
        } else {
            boolean hasMenuKey = ViewConfiguration.get(this).hasPermanentMenuKey();
            boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
            hasSoftwareKeys = !hasMenuKey && !hasBackKey;
        }
        return hasSoftwareKeys;
    }