keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000
相關文章：
http://developer.android.com/tools/publishing/app-signing.html
http://wazai.net/1916/%E7%B0%BD%E7%BD%B2%E4%BD%A0%E7%9A%84android%E6%87%89%E7%94%A8%E7%A8%8B%E5%BC%8F-keystore
