Android Studio更新带来的问题

I've recently updated the gradle version of my project from 2.14.1 to 3.0. Since then the gradle build is failing every time with this error:

Error:Cause: 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.

One easy way to do this is to add the latest version of the build tools as a dependency in your build.gradle file, for example:

dependencies {    classpath 'com.android.tools.build:gradle:2.2.0-beta1'}

You can then run gradle tasks and gradle will download everything you need.

After Android Studio 2.2 stable released on Sep 19 2016 , the latest version of the build tools is 2.2.0 . So you can fix it by :

dependencies {    classpath 'com.android.tools.build:gradle:2.2.0'}

Another Person Solving:

Okay I got it working. For anyone facing the same problem the way it worked for me is as follows:
Go to your external .gradle folder (for me it was C:\Users\drilon.gradle). Inside caches and daemon folder delete all the version folder (they look like this "2.14.1", or "3.0"). Also go to wrapper -> dists -> delete everything there.
Inside your project root (for me it was C:\Users\drilon\AndroidStudioProjects\PorjectName) go to the .gradle folder and delete everything there.
Rebuild the project