本人遇到的问题:IDEA中gradle都OK,在app构建配置窗口显示错误:please select Android SDK。
解决办法:File -> Settings -> Android SDK -> Android SDK Location Edit -> Next, Next (Android SDK is up to date.), Finished。
参考地址:https://stackoverflow.com/questions/21070268/intellij-idea-13-error-please-select-android-sdk