无法在null对象上调用方法containsKey（）

Question

当我通过gradle构建我的Android项目时出现此错误。它大概每周发生一次。

FAILURE: Build failed with an exception.

* What went wrong:
Failed to capture snapshot of input files for task ':xxxxxxxx:compileDebugAidl' property 'importDirs' during up-to-date check.
> Cannot invoke method containsKey() on null object

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

知道什么可能导致这个错误吗？谢谢

Answer 1

从@tapchicoma评论到原始问题，问题：NullPointerException in Google Services Plugin现在被标记为4.2.0固定。

所以，最终的解决方案是更新到：

classpath 'com.google.gms:google-services:4.2.0'

Answer 2

在谷歌修复bug之前，降级到播放服务4.0.1似乎已经为我解决了这个问题：

classpath 'com.google.gms:google-services:4.0.1'

https://stackoverflow.com/a/50930048/4096987