Error:Failed to complete Gradle execution.

错误：

Error:Failed to complete Gradle execution.Cause:The version of Gradle you are using (2.10) does not support the forTasks() method on BuildActionExecuter. Support for this is available in Gradle 3.5 and all later versions.

根据字面意思gradle版本太旧了，我用的Android Studio是3.0预览版的，而gradle是2.10版本的，把gradle版本改成3.5以上的就可以了。