https://qooah.com/2013/09/24/android-4-4-kitkat-icon-%e6%89%81%e5%b9%b3%e5%8c%96%e3%80%81%e7%8b%80%e6%85%8b%e6%ac%84%e9%80%8f%e6%98%8e%e5%8c%96/