错误NDK is missing a "platforms" directory.

编译错误提示：Gradle sync failed: Could not run build action using Gradle distribution 'https://services.gradle.org/distributions/gradle-4.1-all.zip'.

点击Gradle Console

NDK is missing a "platforms" directory.
If you are using NDK, verify the ndk.dir is set to a valid NDK directory.  It is currently set to D:\AndroidStudioSDK\ndk-bundle.
If you are not using NDK, unset the NDK variable from ANDROID_NDK_HOME or local.properties to remove this warning.
不言而喻，NDK缺少一个“platforms”目录。如果您正在使用NDK，请验证NDK。将dir设置为有效的NDK目录。目前它被设置为D: AndroidStudioSDK\ndk-bundle。如果不使用NDK，请从ANDROID_NDK_HOME或local中卸载NDK变量。属性删除此警告。

这个错误Google 的坑。目前只有兼容最新的NDK版本才能解决。

解决办法：

1.打开SDK Manager

2.勾选上NDK最新版本，安装成功后Apply

3.安装完成后重新build下项目搞定！

from:https://blog.csdn.net/github_36787585/article/details/82841129