https://qooah.com/2013/02/10/1%e6%9c%88%e6%9c%80%e6%9a%a2%e9%8a%b710%e6%ac%be-android-%e7%94%a2%e5%93%81-samsung-%e5%8c%85%e6%94%ac8%e4%bb%b6/