the SDK platform-tools version(xxx) is too old to check APIs cimpiled with API xxx.

the SDK platform-tools version(23.1) is too old to check APIs cimpiled with API 24.

今天导入新项目后遇到此问题，进入settings-->Android SDK -->SDK Tools-->Android SDK Tools 升级到最新版本即可解决此问题。

接下来又遇到：Error:java.lang.UnsupportedClassVersionError: com/android/dx/command/Main : Unsupported major.minor version 52.0

解决方法：在Build Tools Version 那儿将24.0.0 改为23.0.3就解决了。