org.gradle.api.internal.tasks.DefaultTaskInputs$TaskInputUnionFileCollection cannot be cast to org.g

将一个项目导入到Android studio3.0后报错，报错内容和截图如下：

org.gradle.api.internal.tasks.DefaultTaskInputs$TaskInputUnionFileCollection cannot be cast to org.gradle.api.internal.file.collections.DefaultConfigurableFileCollection
Possible causes for this unexpected error include:

• Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)
  Re-download dependencies and sync project (requires network)
• The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.
  

  Stop Gradle build processes (requires restart)

• Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.

In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

解决这个问题也比较简单。

如上图所示这个项目project的build.gradle文件中的gradle版本是2.0.0，但是我的Android studio是3.0.1，这个AS对应的gradle的版本是3.0.1，所以我把build.gradle的gradle的版本改为3.0.1就好了。

修改后的截图如下所示：

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